/*
 * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "Object.h"
#include "AreaTriggerPackets.h"
#include "AreaTriggerTemplate.h"
#include "BattlefieldMgr.h"
#include "CellImpl.h"
#include "CinematicMgr.h"
#include "CombatLogPackets.h"
#include "Common.h"
#include "Creature.h"
#include "DB2Stores.h"
#include "GameTime.h"
#include "GridNotifiersImpl.h"
#include "G3DPosition.hpp"
#include "InstanceScenario.h"
#include "Item.h"
#include "Log.h"
#include "MiscPackets.h"
#include "MovementPackets.h"
#include "MovementTypedefs.h"
#include "ObjectAccessor.h"
#include "ObjectMgr.h"
#include "OutdoorPvPMgr.h"
#include "PathGenerator.h"
#include "PhasingHandler.h"
#include "Player.h"
#include "ReputationMgr.h"
#include "SmoothPhasing.h"
#include "SpellAuraEffects.h"
#include "SpellMgr.h"
#include "SpellPackets.h"
#include "StringConvert.h"
#include "TemporarySummon.h"
#include "Totem.h"
#include "Transport.h"
#include "Unit.h"
#include "UpdateData.h"
#include "Util.h"
#include "VMapFactory.h"
#include "Vehicle.h"
#include "VMapManager2.h"
#include "World.h"
#include <G3D/Vector3.h>
#include <sstream>

constexpr float VisibilityDistances[AsUnderlyingType(VisibilityDistanceType::Max)] =
{
    DEFAULT_VISIBILITY_DISTANCE,
    VISIBILITY_DISTANCE_TINY,
    VISIBILITY_DISTANCE_SMALL,
    VISIBILITY_DISTANCE_LARGE,
    VISIBILITY_DISTANCE_GIGANTIC,
    MAX_VISIBILITY_DISTANCE
};

Object::Object() : m_values(this)
{
    m_objectTypeId      = TYPEID_OBJECT;
    m_objectType        = TYPEMASK_OBJECT;
    m_updateFlag.Clear();

    m_inWorld           = false;
    m_isNewObject       = false;
    m_isDestroyedObject = false;
    m_objectUpdated     = false;
}

WorldObject::~WorldObject()
{
    // this may happen because there are many !create/delete
    if (IsWorldObject() && m_currMap)
    {
        if (GetTypeId() == TYPEID_CORPSE)
        {
            TC_LOG_FATAL("misc", "WorldObject::~WorldObject Corpse Type: %d (%s) deleted but still in map!!",
                ToCorpse()->GetType(), GetGUID().ToString().c_str());
            ABORT();
        }
        ResetMap();
    }
}

Object::~Object()
{
    if (IsInWorld())
    {
        TC_LOG_FATAL("misc", "Object::~Object %s deleted but still in world!!", GetGUID().ToString().c_str());
        if (isType(TYPEMASK_ITEM))
            TC_LOG_FATAL("misc", "Item slot %u", ((Item*)this)->GetSlot());
        ABORT();
    }

    if (m_objectUpdated)
    {
        TC_LOG_FATAL("misc", "Object::~Object %s deleted but still in update list!!", GetGUID().ToString().c_str());
        ABORT();
    }
}

void Object::_Create(ObjectGuid const& guid)
{
    m_objectUpdated = false;
    m_guid = guid;
}

void Object::AddToWorld()
{
    if (m_inWorld)
        return;

    m_inWorld = true;

    // synchronize values mirror with values array (changes will send in updatecreate opcode any way
    ASSERT(!m_objectUpdated);
    ClearUpdateMask(false);
}

void Object::RemoveFromWorld()
{
    if (!m_inWorld)
        return;

    m_inWorld = false;

    // if we remove from world then sending changes not required
    ClearUpdateMask(true);
}

void Object::BuildCreateUpdateBlockForPlayer(UpdateData* data, Player* target) const
{
    if (!target)
        return;

    uint8 updateType = m_isNewObject ? UPDATETYPE_CREATE_OBJECT2 : UPDATETYPE_CREATE_OBJECT;
    uint8 objectType = m_objectTypeId;
    CreateObjectBits flags = m_updateFlag;

    if (target == this)                                      // building packet for yourself
    {
        flags.ThisIsYou = true;
        flags.ActivePlayer = true;
        objectType = TYPEID_ACTIVE_PLAYER;
    }

    if (WorldObject const* worldObject = dynamic_cast<WorldObject const*>(this))
    {
        if (!flags.MovementUpdate && !worldObject->m_movementInfo.transport.guid.IsEmpty())
            flags.MovementTransport = true;

        if (worldObject->GetAIAnimKitId() || worldObject->GetMovementAnimKitId() || worldObject->GetMeleeAnimKitId())
            flags.AnimKit = true;

        if (worldObject->GetSmoothPhasing() && worldObject->GetSmoothPhasing()->GetInfoForSeer(target->GetGUID()))
            flags.SmoothPhasing = true;
    }

    if (Unit const* unit = ToUnit())
    {
        flags.PlayHoverAnim = unit->IsPlayingHoverAnim();

        if (unit->GetVictim())
            flags.CombatVictim = true;
    }

    ByteBuffer buf(0x400, ByteBuffer::Reserve{});
    buf << uint8(updateType);
    buf << GetGUID();
    buf << uint8(objectType);

    BuildMovementUpdate(&buf, flags, target);
    BuildValuesCreate(&buf, target);
    data->AddUpdateBlock(buf);
}

void Object::SendUpdateToPlayer(Player* player)
{
    // send create update to player
    UpdateData upd(player->GetMapId());
    WorldPacket packet;

    if (player->HaveAtClient(this))
        BuildValuesUpdateBlockForPlayer(&upd, player);
    else
        BuildCreateUpdateBlockForPlayer(&upd, player);
    upd.BuildPacket(&packet);
    player->SendDirectMessage(&packet);
}

void Object::BuildValuesUpdateBlockForPlayer(UpdateData* data, Player const* target) const
{
    ByteBuffer buf = PrepareValuesUpdateBuffer();

    BuildValuesUpdate(&buf, target);

    data->AddUpdateBlock(buf);
}

void Object::BuildValuesUpdateBlockForPlayerWithFlag(UpdateData* data, UF::UpdateFieldFlag flags, Player const* target) const
{
    ByteBuffer buf = PrepareValuesUpdateBuffer();

    BuildValuesUpdateWithFlag(&buf, flags, target);

    data->AddUpdateBlock(buf);
}

void Object::BuildDestroyUpdateBlock(UpdateData* data) const
{
    data->AddDestroyObject(GetGUID());
}

void Object::BuildOutOfRangeUpdateBlock(UpdateData* data) const
{
    data->AddOutOfRangeGUID(GetGUID());
}

ByteBuffer Object::PrepareValuesUpdateBuffer() const
{
    ByteBuffer buffer(500, ByteBuffer::Reserve{});
    buffer << uint8(UPDATETYPE_VALUES);
    buffer << GetGUID();
    return buffer;
}

void Object::DestroyForPlayer(Player* target) const
{
    ASSERT(target);

    UpdateData updateData(target->GetMapId());
    BuildDestroyUpdateBlock(&updateData);
    WorldPacket packet;
    updateData.BuildPacket(&packet);
    target->SendDirectMessage(&packet);
}

void Object::SendOutOfRangeForPlayer(Player* target) const
{
    ASSERT(target);

    UpdateData updateData(target->GetMapId());
    BuildOutOfRangeUpdateBlock(&updateData);
    WorldPacket packet;
    updateData.BuildPacket(&packet);
    target->SendDirectMessage(&packet);
}

void Object::BuildMovementUpdate(ByteBuffer* data, CreateObjectBits flags, Player* target) const
{
    std::vector<uint32> const* PauseTimes = nullptr;
    uint32 PauseTimesCount = 0;
    if (GameObject const* go = ToGameObject())
    {
        if (go->GetGoType() == GAMEOBJECT_TYPE_TRANSPORT)
        {
            PauseTimes = go->GetGOValue()->Transport.StopFrames;
            PauseTimesCount = PauseTimes->size();
        }
    }

    data->WriteBit(flags.NoBirthAnim);
    data->WriteBit(flags.EnablePortals);
    data->WriteBit(flags.PlayHoverAnim);
    data->WriteBit(flags.MovementUpdate);
    data->WriteBit(flags.MovementTransport);
    data->WriteBit(flags.Stationary);
    data->WriteBit(flags.CombatVictim);
    data->WriteBit(flags.ServerTime);
    data->WriteBit(flags.Vehicle);
    data->WriteBit(flags.AnimKit);
    data->WriteBit(flags.Rotation);
    data->WriteBit(flags.AreaTrigger);
    data->WriteBit(flags.GameObject);
    data->WriteBit(flags.SmoothPhasing);
    data->WriteBit(flags.ThisIsYou);
    data->WriteBit(flags.SceneObject);
    data->WriteBit(flags.ActivePlayer);
    data->WriteBit(flags.Conversation);
    data->FlushBits();

    if (flags.MovementUpdate)
    {
        Unit const* unit = ToUnit();
        bool HasFallDirection = unit->HasUnitMovementFlag(MOVEMENTFLAG_FALLING);
        bool HasFall = HasFallDirection || unit->m_movementInfo.jump.fallTime != 0;
        bool HasSpline = unit->IsSplineEnabled();
        bool HasInertia = unit->m_movementInfo.inertia.has_value();

        *data << GetGUID();                                             // MoverGUID

        *data << uint32(unit->GetUnitMovementFlags());
        *data << uint32(unit->GetExtraUnitMovementFlags());
        *data << uint32(unit->GetExtraUnitMovementFlags2());

        *data << uint32(unit->m_movementInfo.time);                     // MoveTime
        *data << float(unit->GetPositionX());
        *data << float(unit->GetPositionY());
        *data << float(unit->GetPositionZ());
        *data << float(unit->GetOrientation());

        *data << float(unit->m_movementInfo.pitch);                     // Pitch
        *data << float(unit->m_movementInfo.splineElevation);           // StepUpStartElevation

        *data << uint32(0);                                             // RemoveForcesIDs.size()
        *data << uint32(0);                                             // MoveIndex

        //for (std::size_t i = 0; i < RemoveForcesIDs.size(); ++i)
        //    *data << ObjectGuid(RemoveForcesIDs);

        data->WriteBit(!unit->m_movementInfo.transport.guid.IsEmpty()); // HasTransport
        data->WriteBit(HasFall);                                        // HasFall
        data->WriteBit(HasSpline);                                      // HasSpline - marks that the unit uses spline movement
        data->WriteBit(false);                                          // HeightChangeFailed
        data->WriteBit(false);                                          // RemoteTimeValid
        data->WriteBit(HasInertia);                                     // HasInertia

        if (!unit->m_movementInfo.transport.guid.IsEmpty())
            *data << unit->m_movementInfo.transport;

        if (HasInertia)
        {
            *data << unit->m_movementInfo.inertia->guid;
            *data << unit->m_movementInfo.inertia->force.PositionXYZStream();
            *data << uint32(unit->m_movementInfo.inertia->lifetime);
        }

        if (HasFall)
        {
            *data << uint32(unit->m_movementInfo.jump.fallTime);        // Time
            *data << float(unit->m_movementInfo.jump.zspeed);           // JumpVelocity

            if (data->WriteBit(HasFallDirection))
            {
                *data << float(unit->m_movementInfo.jump.sinAngle);     // Direction
                *data << float(unit->m_movementInfo.jump.cosAngle);
                *data << float(unit->m_movementInfo.jump.xyspeed);      // Speed
            }
        }

        *data << float(unit->GetSpeed(MOVE_WALK));
        *data << float(unit->GetSpeed(MOVE_RUN));
        *data << float(unit->GetSpeed(MOVE_RUN_BACK));
        *data << float(unit->GetSpeed(MOVE_SWIM));
        *data << float(unit->GetSpeed(MOVE_SWIM_BACK));
        *data << float(unit->GetSpeed(MOVE_FLIGHT));
        *data << float(unit->GetSpeed(MOVE_FLIGHT_BACK));
        *data << float(unit->GetSpeed(MOVE_TURN_RATE));
        *data << float(unit->GetSpeed(MOVE_PITCH_RATE));

        if (MovementForces const* movementForces = unit->GetMovementForces())
        {
            *data << uint32(movementForces->GetForces()->size());
            *data << float(movementForces->GetModMagnitude());          // MovementForcesModMagnitude
        }
        else
        {
            *data << uint32(0);
            *data << float(1.0f);                                       // MovementForcesModMagnitude
        }

        data->WriteBit(HasSpline);
        data->FlushBits();

        if (MovementForces const* movementForces = unit->GetMovementForces())
            for (MovementForce const& force : *movementForces->GetForces())
                WorldPackets::Movement::CommonMovement::WriteMovementForceWithDirection(force, *data, unit);

        if (HasSpline)
            WorldPackets::Movement::CommonMovement::WriteCreateObjectSplineDataBlock(*unit->movespline, *data);
    }

    *data << uint32(PauseTimesCount);

    if (flags.Stationary)
    {
        WorldObject const* self = static_cast<WorldObject const*>(this);
        *data << float(self->GetStationaryX());
        *data << float(self->GetStationaryY());
        *data << float(self->GetStationaryZ());
        *data << float(self->GetStationaryO());
    }

    if (flags.CombatVictim)
        *data << ToUnit()->GetVictim()->GetGUID();                      // CombatVictim

    if (flags.ServerTime)
    {
        GameObject const* go = ToGameObject();
        /** @TODO Use IsTransport() to also handle type 11 (TRANSPORT)
            Currently grid objects are not updated if there are no nearby players,
            this causes clients to receive different PathProgress
            resulting in players seeing the object in a different position
        */
        if (go && go->ToTransport())                                    // ServerTime
            *data << uint32(go->GetGOValue()->Transport.PathProgress);
        else
            *data << uint32(GameTime::GetGameTimeMS());
    }

    if (flags.Vehicle)
    {
        Unit const* unit = ToUnit();
        *data << uint32(unit->GetVehicleKit()->GetVehicleInfo()->ID);   // RecID
        *data << float(unit->GetOrientation());                         // InitialRawFacing
    }

    if (flags.AnimKit)
    {
        WorldObject const* self = static_cast<WorldObject const*>(this);
        *data << uint16(self->GetAIAnimKitId());                        // AiID
        *data << uint16(self->GetMovementAnimKitId());                  // MovementID
        *data << uint16(self->GetMeleeAnimKitId());                     // MeleeID
    }

    if (flags.Rotation)
        *data << uint64(ToGameObject()->GetPackedLocalRotation());      // Rotation

    if (PauseTimesCount)
        data->append(PauseTimes->data(), PauseTimes->size());

    if (flags.MovementTransport)
    {
        WorldObject const* self = static_cast<WorldObject const*>(this);
        *data << self->m_movementInfo.transport;
    }

    if (flags.AreaTrigger)
    {
        AreaTrigger const* areaTrigger = ToAreaTrigger();
        AreaTriggerCreateProperties const* createProperties = areaTrigger->GetCreateProperties();
        AreaTriggerTemplate const* areaTriggerTemplate = areaTrigger->GetTemplate();
        AreaTriggerShapeInfo const& shape = areaTrigger->GetShape();

        *data << uint32(areaTrigger->GetTimeSinceCreated());

        *data << areaTrigger->GetRollPitchYaw().PositionXYZStream();

        bool hasAbsoluteOrientation = areaTriggerTemplate && areaTrigger->GetTemplate()->HasFlag(AREATRIGGER_FLAG_HAS_ABSOLUTE_ORIENTATION);
        bool hasDynamicShape        = areaTriggerTemplate && areaTrigger->GetTemplate()->HasFlag(AREATRIGGER_FLAG_HAS_DYNAMIC_SHAPE);
        bool hasAttached            = areaTriggerTemplate && areaTrigger->GetTemplate()->HasFlag(AREATRIGGER_FLAG_HAS_ATTACHED);
        bool hasFaceMovementDir     = areaTriggerTemplate && areaTrigger->GetTemplate()->HasFlag(AREATRIGGER_FLAG_HAS_FACE_MOVEMENT_DIR);
        bool hasFollowsTerrain      = areaTriggerTemplate && areaTrigger->GetTemplate()->HasFlag(AREATRIGGER_FLAG_HAS_FOLLOWS_TERRAIN);
        bool hasUnk1                = areaTriggerTemplate && areaTrigger->GetTemplate()->HasFlag(AREATRIGGER_FLAG_UNK1);
        bool hasTargetRollPitchYaw  = areaTriggerTemplate && areaTrigger->GetTemplate()->HasFlag(AREATRIGGER_FLAG_HAS_TARGET_ROLL_PITCH_YAW);
        bool hasScaleCurveID        = createProperties && createProperties->ScaleCurveId != 0;
        bool hasMorphCurveID        = createProperties && createProperties->MorphCurveId != 0;
        bool hasFacingCurveID       = createProperties && createProperties->FacingCurveId != 0;
        bool hasMoveCurveID         = createProperties && createProperties->MoveCurveId != 0;
        bool hasAreaTriggerSphere   = shape.IsSphere();
        bool hasAreaTriggerBox      = shape.IsBox();
        bool hasAreaTriggerPolygon  = createProperties && shape.IsPolygon();
        bool hasAreaTriggerCylinder = shape.IsCylinder();
        bool hasDisk                = shape.IsDisk();
        bool hasAreaTriggerSpline   = areaTrigger->HasSplines();
        bool hasOrbit               = areaTrigger->HasOrbit();
        bool hasMovementScript      = false;

        data->WriteBit(hasAbsoluteOrientation);
        data->WriteBit(hasDynamicShape);
        data->WriteBit(hasAttached);
        data->WriteBit(hasFaceMovementDir);
        data->WriteBit(hasFollowsTerrain);
        data->WriteBit(hasUnk1);
        data->WriteBit(hasTargetRollPitchYaw);
        data->WriteBit(hasScaleCurveID);
        data->WriteBit(hasMorphCurveID);
        data->WriteBit(hasFacingCurveID);
        data->WriteBit(hasMoveCurveID);
        data->WriteBit(hasAreaTriggerSphere);
        data->WriteBit(hasAreaTriggerBox);
        data->WriteBit(hasAreaTriggerPolygon);
        data->WriteBit(hasAreaTriggerCylinder);
        data->WriteBit(hasDisk);
        data->WriteBit(hasAreaTriggerSpline);
        data->WriteBit(hasOrbit);
        data->WriteBit(hasMovementScript);

        data->FlushBits();

        if (hasAreaTriggerSpline)
        {
            *data << uint32(areaTrigger->GetTimeToTarget());
            *data << uint32(areaTrigger->GetElapsedTimeForMovement());

            WorldPackets::Movement::CommonMovement::WriteCreateObjectAreaTriggerSpline(areaTrigger->GetSpline(), *data);
        }

        if (hasTargetRollPitchYaw)
            *data << areaTrigger->GetTargetRollPitchYaw().PositionXYZStream();

        if (hasScaleCurveID)
            *data << uint32(createProperties->ScaleCurveId);

        if (hasMorphCurveID)
            *data << uint32(createProperties->MorphCurveId);

        if (hasFacingCurveID)
            *data << uint32(createProperties->FacingCurveId);

        if (hasMoveCurveID)
            *data << uint32(createProperties->MoveCurveId);

        if (hasAreaTriggerSphere)
        {
            *data << float(shape.SphereDatas.Radius);
            *data << float(shape.SphereDatas.RadiusTarget);
        }

        if (hasAreaTriggerBox)
        {
            *data << float(shape.BoxDatas.Extents[0]);
            *data << float(shape.BoxDatas.Extents[1]);
            *data << float(shape.BoxDatas.Extents[2]);
            *data << float(shape.BoxDatas.ExtentsTarget[0]);
            *data << float(shape.BoxDatas.ExtentsTarget[1]);
            *data << float(shape.BoxDatas.ExtentsTarget[2]);
        }

        if (hasAreaTriggerPolygon)
        {
            *data << int32(createProperties->PolygonVertices.size());
            *data << int32(createProperties->PolygonVerticesTarget.size());
            *data << float(shape.PolygonDatas.Height);
            *data << float(shape.PolygonDatas.HeightTarget);

            for (TaggedPosition<Position::XY> const& vertice : createProperties->PolygonVertices)
                *data << vertice;

            for (TaggedPosition<Position::XY> const& vertice : createProperties->PolygonVerticesTarget)
                *data << vertice;
        }

        if (hasAreaTriggerCylinder)
        {
            *data << float(shape.CylinderDatas.Radius);
            *data << float(shape.CylinderDatas.RadiusTarget);
            *data << float(shape.CylinderDatas.Height);
            *data << float(shape.CylinderDatas.HeightTarget);
            *data << float(shape.CylinderDatas.LocationZOffset);
            *data << float(shape.CylinderDatas.LocationZOffsetTarget);
        }

        if (hasDisk)
        {
            *data << float(shape.DiskDatas.InnerRadius);
            *data << float(shape.DiskDatas.InnerRadiusTarget);
            *data << float(shape.DiskDatas.OuterRadius);
            *data << float(shape.DiskDatas.OuterRadiusTarget);
            *data << float(shape.DiskDatas.Height);
            *data << float(shape.DiskDatas.HeightTarget);
            *data << float(shape.DiskDatas.LocationZOffset);
            *data << float(shape.DiskDatas.LocationZOffsetTarget);
        }

        //if (hasMovementScript)
        //    *data << *areaTrigger->GetMovementScript(); // AreaTriggerMovementScriptInfo

        if (hasOrbit)
            *data << *areaTrigger->GetCircularMovementInfo();
    }

    if (flags.GameObject)
    {
        bool bit8 = false;
        uint32 Int1 = 0;

        GameObject const* gameObject = ToGameObject();

        *data << uint32(gameObject->GetWorldEffectID());

        data->WriteBit(bit8);
        data->FlushBits();
        if (bit8)
            *data << uint32(Int1);
    }

    if (flags.SmoothPhasing)
    {
        SmoothPhasingInfo const* smoothPhasingInfo = static_cast<WorldObject const*>(this)->GetSmoothPhasing()->GetInfoForSeer(target->GetGUID());
        ASSERT(smoothPhasingInfo);

        data->WriteBit(smoothPhasingInfo->ReplaceActive);
        data->WriteBit(smoothPhasingInfo->StopAnimKits);
        data->WriteBit(smoothPhasingInfo->ReplaceObject.has_value());
        data->FlushBits();
        if (smoothPhasingInfo->ReplaceObject)
            *data << *smoothPhasingInfo->ReplaceObject;
    }

    if (flags.SceneObject)
    {
        data->WriteBit(false);                                          // HasLocalScriptData
        data->WriteBit(false);                                          // HasPetBattleFullUpdate
        data->FlushBits();

    //    if (HasLocalScriptData)
    //    {
    //        data->WriteBits(Data.length(), 7);
    //        data->FlushBits();
    //        data->WriteString(Data);
    //    }

    //    if (HasPetBattleFullUpdate)
    //    {
    //        for (std::size_t i = 0; i < 2; ++i)
    //        {
    //            *data << ObjectGuid(Players[i].CharacterID);
    //            *data << int32(Players[i].TrapAbilityID);
    //            *data << int32(Players[i].TrapStatus);
    //            *data << uint16(Players[i].RoundTimeSecs);
    //            *data << int8(Players[i].FrontPet);
    //            *data << uint8(Players[i].InputFlags);

    //            data->WriteBits(Players[i].Pets.size(), 2);
    //            data->FlushBits();
    //            for (std::size_t j = 0; j < Players[i].Pets.size(); ++j)
    //            {
    //                *data << ObjectGuid(Players[i].Pets[j].BattlePetGUID);
    //                *data << int32(Players[i].Pets[j].SpeciesID);
    //                *data << int32(Players[i].Pets[j].CreatureID);
    //                *data << int32(Players[i].Pets[j].DisplayID);
    //                *data << int16(Players[i].Pets[j].Level);
    //                *data << int16(Players[i].Pets[j].Xp);
    //                *data << int32(Players[i].Pets[j].CurHealth);
    //                *data << int32(Players[i].Pets[j].MaxHealth);
    //                *data << int32(Players[i].Pets[j].Power);
    //                *data << int32(Players[i].Pets[j].Speed);
    //                *data << int32(Players[i].Pets[j].NpcTeamMemberID);
    //                *data << uint16(Players[i].Pets[j].BreedQuality);
    //                *data << uint16(Players[i].Pets[j].StatusFlags);
    //                *data << int8(Players[i].Pets[j].Slot);

    //                *data << uint32(Players[i].Pets[j].Abilities.size());
    //                *data << uint32(Players[i].Pets[j].Auras.size());
    //                *data << uint32(Players[i].Pets[j].States.size());
    //                for (std::size_t k = 0; k < Players[i].Pets[j].Abilities.size(); ++k)
    //                {
    //                    *data << int32(Players[i].Pets[j].Abilities[k].AbilityID);
    //                    *data << int16(Players[i].Pets[j].Abilities[k].CooldownRemaining);
    //                    *data << int16(Players[i].Pets[j].Abilities[k].LockdownRemaining);
    //                    *data << int8(Players[i].Pets[j].Abilities[k].AbilityIndex);
    //                    *data << uint8(Players[i].Pets[j].Abilities[k].Pboid);
    //                }

    //                for (std::size_t k = 0; k < Players[i].Pets[j].Auras.size(); ++k)
    //                {
    //                    *data << int32(Players[i].Pets[j].Auras[k].AbilityID);
    //                    *data << uint32(Players[i].Pets[j].Auras[k].InstanceID);
    //                    *data << int32(Players[i].Pets[j].Auras[k].RoundsRemaining);
    //                    *data << int32(Players[i].Pets[j].Auras[k].CurrentRound);
    //                    *data << uint8(Players[i].Pets[j].Auras[k].CasterPBOID);
    //                }

    //                for (std::size_t k = 0; k < Players[i].Pets[j].States.size(); ++k)
    //                {
    //                    *data << uint32(Players[i].Pets[j].States[k].StateID);
    //                    *data << int32(Players[i].Pets[j].States[k].StateValue);
    //                }

    //                data->WriteBits(Players[i].Pets[j].CustomName.length(), 7);
    //                data->FlushBits();
    //                data->WriteString(Players[i].Pets[j].CustomName);
    //            }
    //        }

    //        for (std::size_t i = 0; i < 3; ++i)
    //        {
    //            *data << uint32(Enviros[j].Auras.size());
    //            *data << uint32(Enviros[j].States.size());
    //            for (std::size_t j = 0; j < Enviros[j].Auras.size(); ++j)
    //            {
    //                *data << int32(Enviros[j].Auras[j].AbilityID);
    //                *data << uint32(Enviros[j].Auras[j].InstanceID);
    //                *data << int32(Enviros[j].Auras[j].RoundsRemaining);
    //                *data << int32(Enviros[j].Auras[j].CurrentRound);
    //                *data << uint8(Enviros[j].Auras[j].CasterPBOID);
    //            }

    //            for (std::size_t j = 0; j < Enviros[j].States.size(); ++j)
    //            {
    //                *data << uint32(Enviros[i].States[j].StateID);
    //                *data << int32(Enviros[i].States[j].StateValue);
    //            }
    //        }

    //        *data << uint16(WaitingForFrontPetsMaxSecs);
    //        *data << uint16(PvpMaxRoundTime);
    //        *data << int32(CurRound);
    //        *data << uint32(NpcCreatureID);
    //        *data << uint32(NpcDisplayID);
    //        *data << int8(CurPetBattleState);
    //        *data << uint8(ForfeitPenalty);
    //        *data << ObjectGuid(InitialWildPetGUID);
    //        data->WriteBit(IsPVP);
    //        data->WriteBit(CanAwardXP);
    //        data->FlushBits();
    //    }
    }

    if (flags.ActivePlayer)
    {
        Player const* player = ToPlayer();

        bool HasSceneInstanceIDs = !player->GetSceneMgr().GetSceneTemplateByInstanceMap().empty();
        bool HasRuneState = ToUnit()->GetPowerIndex(POWER_RUNES) != MAX_POWERS;

        data->WriteBit(HasSceneInstanceIDs);
        data->WriteBit(HasRuneState);
        data->FlushBits();
        if (HasSceneInstanceIDs)
        {
            *data << uint32(player->GetSceneMgr().GetSceneTemplateByInstanceMap().size());
            for (auto const& itr : player->GetSceneMgr().GetSceneTemplateByInstanceMap())
                *data << uint32(itr.first);
        }
        if (HasRuneState)
        {
            float baseCd = float(player->GetRuneBaseCooldown());
            uint32 maxRunes = uint32(player->GetMaxPower(POWER_RUNES));

            *data << uint8((1 << maxRunes) - 1);
            *data << uint8(player->GetRunesState());
            *data << uint32(maxRunes);
            for (uint32 i = 0; i < maxRunes; ++i)
                *data << uint8((baseCd - float(player->GetRuneCooldown(i))) / baseCd * 255);
        }
    }

    if (flags.Conversation)
    {
        Conversation const* self = ToConversation();
        if (data->WriteBit(self->GetTextureKitId() != 0))
            *data << uint32(self->GetTextureKitId());

        data->FlushBits();
    }
}

UF::UpdateFieldFlag Object::GetUpdateFieldFlagsFor(Player const* /*target*/) const
{
    return UF::UpdateFieldFlag::None;
}

void Object::BuildValuesUpdateWithFlag(ByteBuffer* data, UF::UpdateFieldFlag /*flags*/, Player const* /*target*/) const
{
    std::size_t sizePos = data->wpos();
    *data << uint32(0);
    *data << uint32(0);

    data->put<uint32>(sizePos, data->wpos() - sizePos - 4);
}

void Object::AddToObjectUpdateIfNeeded()
{
    if (m_inWorld && !m_objectUpdated)
        m_objectUpdated = AddToObjectUpdate();
}

void Object::ClearUpdateMask(bool remove)
{
    m_values.ClearChangesMask(&Object::m_objectData);

    if (m_objectUpdated)
    {
        if (remove)
            RemoveFromObjectUpdate();
        m_objectUpdated = false;
    }
}

void Object::BuildFieldsUpdate(Player* player, UpdateDataMapType& data_map) const
{
    UpdateDataMapType::iterator iter = data_map.find(player);

    if (iter == data_map.end())
    {
        std::pair<UpdateDataMapType::iterator, bool> p = data_map.emplace(player, UpdateData(player->GetMapId()));
        ASSERT(p.second);
        iter = p.first;
    }

    BuildValuesUpdateBlockForPlayer(&iter->second, iter->first);
}

std::string Object::GetDebugInfo() const
{
    std::stringstream sstr;
    sstr << GetGUID().ToString() + " Entry " << GetEntry();
    return sstr.str();
}

void MovementInfo::OutDebug()
{
    TC_LOG_DEBUG("misc", "MOVEMENT INFO");
    TC_LOG_DEBUG("misc", "%s", guid.ToString().c_str());
    TC_LOG_DEBUG("misc", "flags %s (%u)", Movement::MovementFlags_ToString(flags).c_str(), flags);
    TC_LOG_DEBUG("misc", "flags2 %s (%u)", Movement::MovementFlagsExtra_ToString(flags2).c_str(), flags2);
    TC_LOG_DEBUG("misc", "time %u current time %u", time, getMSTime());
    TC_LOG_DEBUG("misc", "position: `%s`", pos.ToString().c_str());
    if (!transport.guid.IsEmpty())
    {
        TC_LOG_DEBUG("misc", "TRANSPORT:");
        TC_LOG_DEBUG("misc", "%s", transport.guid.ToString().c_str());
        TC_LOG_DEBUG("misc", "position: `%s`", transport.pos.ToString().c_str());
        TC_LOG_DEBUG("misc", "seat: %i", transport.seat);
        TC_LOG_DEBUG("misc", "time: %u", transport.time);
        if (transport.prevTime)
            TC_LOG_DEBUG("misc", "prevTime: %u", transport.prevTime);
        if (transport.vehicleId)
            TC_LOG_DEBUG("misc", "vehicleId: %u", transport.vehicleId);
    }

    if ((flags & (MOVEMENTFLAG_SWIMMING | MOVEMENTFLAG_FLYING)) || (flags2 & MOVEMENTFLAG2_ALWAYS_ALLOW_PITCHING))
        TC_LOG_DEBUG("misc", "pitch: %f", pitch);

    if (flags & MOVEMENTFLAG_FALLING || jump.fallTime)
    {
        TC_LOG_DEBUG("misc", "fallTime: %u j_zspeed: %f", jump.fallTime, jump.zspeed);
        if (flags & MOVEMENTFLAG_FALLING)
            TC_LOG_DEBUG("misc", "j_sinAngle: %f j_cosAngle: %f j_xyspeed: %f", jump.sinAngle, jump.cosAngle, jump.xyspeed);
    }

    if (flags & MOVEMENTFLAG_SPLINE_ELEVATION)
        TC_LOG_DEBUG("misc", "splineElevation: %f", splineElevation);
}

WorldObject::WorldObject(bool isWorldObject) : Object(), WorldLocation(), LastUsedScriptID(0),
m_movementInfo(), m_name(), m_isActive(false), m_isFarVisible(false), m_isWorldObject(isWorldObject), m_zoneScript(nullptr),
m_transport(nullptr), m_zoneId(0), m_areaId(0), m_staticFloorZ(VMAP_INVALID_HEIGHT), m_outdoors(false), m_liquidStatus(LIQUID_MAP_NO_WATER),
m_currMap(nullptr), m_InstanceId(0), _dbPhase(0), m_notifyflags(0)
{
    m_serverSideVisibility.SetValue(SERVERSIDE_VISIBILITY_GHOST, GHOST_VISIBILITY_ALIVE | GHOST_VISIBILITY_GHOST);
    m_serverSideVisibilityDetect.SetValue(SERVERSIDE_VISIBILITY_GHOST, GHOST_VISIBILITY_ALIVE);
}

void WorldObject::SetWorldObject(bool on)
{
    if (!IsInWorld())
        return;

    GetMap()->AddObjectToSwitchList(this, on);
}

bool WorldObject::IsWorldObject() const
{
    if (m_isWorldObject)
        return true;

    if (ToCreature() && ToCreature()->m_isTempWorldObject)
        return true;

    return false;
}

void WorldObject::setActive(bool on)
{
    if (m_isActive == on)
        return;

    if (GetTypeId() == TYPEID_PLAYER)
        return;

    m_isActive = on;

    if (on && !IsInWorld())
        return;

    Map* map = FindMap();
    if (!map)
        return;

    if (on)
    {
        if (GetTypeId() == TYPEID_UNIT)
            map->AddToActive(ToCreature());
        else if (GetTypeId() == TYPEID_DYNAMICOBJECT)
            map->AddToActive((DynamicObject*)this);
    }
    else
    {
        if (GetTypeId() == TYPEID_UNIT)
            map->RemoveFromActive(ToCreature());
        else if (GetTypeId() == TYPEID_DYNAMICOBJECT)
            map->RemoveFromActive((DynamicObject*)this);
    }
}

void WorldObject::SetVisibilityDistanceOverride(VisibilityDistanceType type)
{
    ASSERT(type < VisibilityDistanceType::Max);
    if (GetTypeId() == TYPEID_PLAYER)
        return;

    m_visibilityDistanceOverride = VisibilityDistances[AsUnderlyingType(type)];
}

void WorldObject::SetFarVisible(bool on)
{
    if (GetTypeId() == TYPEID_PLAYER)
        return;

    m_isFarVisible = on;
}

void WorldObject::CleanupsBeforeDelete(bool /*finalCleanup*/)
{
    if (IsInWorld())
        RemoveFromWorld();

    if (Transport* transport = GetTransport())
        transport->RemovePassenger(this);
}

void WorldObject::UpdatePositionData()
{
    PositionFullTerrainStatus data;
    GetMap()->GetFullTerrainStatusForPosition(_phaseShift, GetPositionX(), GetPositionY(), GetPositionZ(), data, map_liquidHeaderTypeFlags::AllLiquids, GetCollisionHeight());
    ProcessPositionDataChanged(data);
}

void WorldObject::ProcessPositionDataChanged(PositionFullTerrainStatus const& data)
{
    m_zoneId = m_areaId = data.areaId;
    if (AreaTableEntry const* area = sAreaTableStore.LookupEntry(m_areaId))
        if (area->ParentAreaID)
            m_zoneId = area->ParentAreaID;
    m_outdoors = data.outdoors;
    m_staticFloorZ = data.floorZ;
    m_liquidStatus = data.liquidStatus;
}

void WorldObject::AddToWorld()
{
    Object::AddToWorld();
    GetMap()->GetZoneAndAreaId(_phaseShift, m_zoneId, m_areaId, GetPositionX(), GetPositionY(), GetPositionZ());
}

void WorldObject::RemoveFromWorld()
{
    if (!IsInWorld())
        return;

    UpdateObjectVisibilityOnDestroy();

    Object::RemoveFromWorld();
}

bool WorldObject::IsInWorldPvpZone() const
{
    switch (GetZoneId())
    {
        case 4197: // Wintergrasp
        case 5095: // Tol Barad
        case 6941: // Ashran
            return true;
            break;
        default:
            return false;
            break;
    }
}

InstanceScript* WorldObject::GetInstanceScript() const
{
    Map* map = GetMap();
    return map->IsDungeon() ? ((InstanceMap*)map)->GetInstanceScript() : nullptr;
}

float WorldObject::GetDistanceZ(WorldObject const* obj) const
{
    float dz = std::fabs(GetPositionZ() - obj->GetPositionZ());
    float sizefactor = GetCombatReach() + obj->GetCombatReach();
    float dist = dz - sizefactor;
    return (dist > 0 ? dist : 0);
}

bool WorldObject::_IsWithinDist(WorldObject const* obj, float dist2compare, bool is3D, bool incOwnRadius, bool incTargetRadius) const
{
    float sizefactor = 0;
    sizefactor += incOwnRadius ? GetCombatReach() : 0.0f;
    sizefactor += incTargetRadius ? obj->GetCombatReach() : 0.0f;
    float maxdist = dist2compare + sizefactor;

    Position const* thisOrTransport = this;
    Position const* objOrObjTransport = obj;

    if (GetTransport() && obj->GetTransport() && obj->GetTransport()->GetGUID() == GetTransport()->GetGUID())
    {
        thisOrTransport = &m_movementInfo.transport.pos;
        objOrObjTransport = &obj->m_movementInfo.transport.pos;
    }

    if (is3D)
        return thisOrTransport->IsInDist(objOrObjTransport, maxdist);
    else
        return thisOrTransport->IsInDist2d(objOrObjTransport, maxdist);
}

float WorldObject::GetDistance(WorldObject const* obj) const
{
    float d = GetExactDist(obj) - GetCombatReach() - obj->GetCombatReach();
    return d > 0.0f ? d : 0.0f;
}

float WorldObject::GetDistance(Position const& pos) const
{
    float d = GetExactDist(&pos) - GetCombatReach();
    return d > 0.0f ? d : 0.0f;
}

float WorldObject::GetDistance(float x, float y, float z) const
{
    float d = GetExactDist(x, y, z) - GetCombatReach();
    return d > 0.0f ? d : 0.0f;
}

float WorldObject::GetDistance2d(WorldObject const* obj) const
{
    float d = GetExactDist2d(obj) - GetCombatReach() - obj->GetCombatReach();
    return d > 0.0f ? d : 0.0f;
}

float WorldObject::GetDistance2d(float x, float y) const
{
    float d = GetExactDist2d(x, y) - GetCombatReach();
    return d > 0.0f ? d : 0.0f;
}

bool WorldObject::IsSelfOrInSameMap(WorldObject const* obj) const
{
    if (this == obj)
        return true;
    return IsInMap(obj);
}

bool WorldObject::IsInMap(WorldObject const* obj) const
{
    if (obj)
        return IsInWorld() && obj->IsInWorld() && (GetMap() == obj->GetMap());
    return false;
}

bool WorldObject::IsWithinDist3d(float x, float y, float z, float dist) const
{
    return IsInDist(x, y, z, dist + GetCombatReach());
}

bool WorldObject::IsWithinDist3d(Position const* pos, float dist) const
{
    return IsInDist(pos, dist + GetCombatReach());
}

bool WorldObject::IsWithinDist2d(float x, float y, float dist) const
{
    return IsInDist2d(x, y, dist + GetCombatReach());
}

bool WorldObject::IsWithinDist2d(Position const* pos, float dist) const
{
    return IsInDist2d(pos, dist + GetCombatReach());
}

bool WorldObject::IsWithinDist(WorldObject const* obj, float dist2compare, bool is3D /*= true*/) const
{
    return obj && _IsWithinDist(obj, dist2compare, is3D);
}

bool WorldObject::IsWithinDistInMap(WorldObject const* obj, float dist2compare, bool is3D /*= true*/, bool incOwnRadius /*= true*/, bool incTargetRadius /*= true*/) const
{
    return obj && IsInMap(obj) && IsInPhase(obj) && _IsWithinDist(obj, dist2compare, is3D, incOwnRadius, incTargetRadius);
}

Position WorldObject::GetHitSpherePointFor(Position const& dest) const
{
    G3D::Vector3 vThis(GetPositionX(), GetPositionY(), GetPositionZ() + GetCollisionHeight());
    G3D::Vector3 vObj(dest.GetPositionX(), dest.GetPositionY(), dest.GetPositionZ());
    G3D::Vector3 contactPoint = vThis + (vObj - vThis).directionOrZero() * std::min(dest.GetExactDist(GetPosition()), GetCombatReach());

    return Position(contactPoint.x, contactPoint.y, contactPoint.z, GetAbsoluteAngle(contactPoint.x, contactPoint.y));
}

bool WorldObject::IsWithinLOS(float ox, float oy, float oz, LineOfSightChecks checks, VMAP::ModelIgnoreFlags ignoreFlags) const
{
    if (IsInWorld())
    {
        oz += GetCollisionHeight();
        float x, y, z;
        if (GetTypeId() == TYPEID_PLAYER)
        {
            GetPosition(x, y, z);
            z += GetCollisionHeight();
        }
        else
            GetHitSpherePointFor({ ox, oy, oz }, x, y, z);

        return GetMap()->isInLineOfSight(GetPhaseShift(), x, y, z, ox, oy, oz, checks, ignoreFlags);
    }

    return true;
}

bool WorldObject::IsWithinLOSInMap(WorldObject const* obj, LineOfSightChecks checks, VMAP::ModelIgnoreFlags ignoreFlags) const
{
    if (!IsInMap(obj))
        return false;

    float ox, oy, oz;
    if (obj->GetTypeId() == TYPEID_PLAYER)
    {
        obj->GetPosition(ox, oy, oz);
        oz += GetCollisionHeight();
    }
    else
        obj->GetHitSpherePointFor({ GetPositionX(), GetPositionY(), GetPositionZ() + GetCollisionHeight() }, ox, oy, oz);

    float x, y, z;
    if (GetTypeId() == TYPEID_PLAYER)
    {
        GetPosition(x, y, z);
        z += GetCollisionHeight();
    }
    else
        GetHitSpherePointFor({ obj->GetPositionX(), obj->GetPositionY(), obj->GetPositionZ() + obj->GetCollisionHeight() }, x, y, z);

    return GetMap()->isInLineOfSight(GetPhaseShift(), x, y, z, ox, oy, oz, checks, ignoreFlags);
}

void WorldObject::GetHitSpherePointFor(Position const& dest, float& x, float& y, float& z) const
{
    Position pos = GetHitSpherePointFor(dest);
    x = pos.GetPositionX();
    y = pos.GetPositionY();
    z = pos.GetPositionZ();
}

bool WorldObject::GetDistanceOrder(WorldObject const* obj1, WorldObject const* obj2, bool is3D /* = true */) const
{
    float dx1 = GetPositionX() - obj1->GetPositionX();
    float dy1 = GetPositionY() - obj1->GetPositionY();
    float distsq1 = dx1*dx1 + dy1*dy1;
    if (is3D)
    {
        float dz1 = GetPositionZ() - obj1->GetPositionZ();
        distsq1 += dz1*dz1;
    }

    float dx2 = GetPositionX() - obj2->GetPositionX();
    float dy2 = GetPositionY() - obj2->GetPositionY();
    float distsq2 = dx2*dx2 + dy2*dy2;
    if (is3D)
    {
        float dz2 = GetPositionZ() - obj2->GetPositionZ();
        distsq2 += dz2*dz2;
    }

    return distsq1 < distsq2;
}

bool WorldObject::IsInRange(WorldObject const* obj, float minRange, float maxRange, bool is3D /* = true */) const
{
    float dx = GetPositionX() - obj->GetPositionX();
    float dy = GetPositionY() - obj->GetPositionY();
    float distsq = dx*dx + dy*dy;
    if (is3D)
    {
        float dz = GetPositionZ() - obj->GetPositionZ();
        distsq += dz*dz;
    }

    float sizefactor = GetCombatReach() + obj->GetCombatReach();

    // check only for real range
    if (minRange > 0.0f)
    {
        float mindist = minRange + sizefactor;
        if (distsq < mindist * mindist)
            return false;
    }

    float maxdist = maxRange + sizefactor;
    return distsq < maxdist * maxdist;
}

bool WorldObject::IsInRange2d(float x, float y, float minRange, float maxRange) const
{
    float dx = GetPositionX() - x;
    float dy = GetPositionY() - y;
    float distsq = dx*dx + dy*dy;

    float sizefactor = GetCombatReach();

    // check only for real range
    if (minRange > 0.0f)
    {
        float mindist = minRange + sizefactor;
        if (distsq < mindist * mindist)
            return false;
    }

    float maxdist = maxRange + sizefactor;
    return distsq < maxdist * maxdist;
}

bool WorldObject::IsInRange3d(float x, float y, float z, float minRange, float maxRange) const
{
    float dx = GetPositionX() - x;
    float dy = GetPositionY() - y;
    float dz = GetPositionZ() - z;
    float distsq = dx*dx + dy*dy + dz*dz;

    float sizefactor = GetCombatReach();

    // check only for real range
    if (minRange > 0.0f)
    {
        float mindist = minRange + sizefactor;
        if (distsq < mindist * mindist)
            return false;
    }

    float maxdist = maxRange + sizefactor;
    return distsq < maxdist * maxdist;
}

bool WorldObject::IsInBetween(Position const& pos1, Position const& pos2, float size) const
{
    float dist = GetExactDist2d(pos1);

    // not using sqrt() for performance
    if ((dist * dist) >= pos1.GetExactDist2dSq(pos2))
        return false;

    if (!size)
        size = GetCombatReach() / 2;

    float angle = pos1.GetAbsoluteAngle(pos2);

    // not using sqrt() for performance
    return (size * size) >= GetExactDist2dSq(pos1.GetPositionX() + std::cos(angle) * dist, pos1.GetPositionY() + std::sin(angle) * dist);
}

bool WorldObject::isInFront(WorldObject const* target, float arc) const
{
    return HasInArc(arc, target);
}

bool WorldObject::isInBack(WorldObject const* target, float arc) const
{
    return !HasInArc(2 * float(M_PI) - arc, target);
}

void WorldObject::GetRandomPoint(Position const& pos, float distance, float& rand_x, float& rand_y, float& rand_z) const
{
    if (!distance)
    {
        pos.GetPosition(rand_x, rand_y, rand_z);
        return;
    }

    // angle to face `obj` to `this`
    float angle = (float)rand_norm()*static_cast<float>(2*M_PI);
    float new_dist = (float)rand_norm() + (float)rand_norm();
    new_dist = distance * (new_dist > 1 ? new_dist - 2 : new_dist);

    rand_x = pos.m_positionX + new_dist * std::cos(angle);
    rand_y = pos.m_positionY + new_dist * std::sin(angle);
    rand_z = pos.m_positionZ;

    Trinity::NormalizeMapCoord(rand_x);
    Trinity::NormalizeMapCoord(rand_y);
    UpdateGroundPositionZ(rand_x, rand_y, rand_z);            // update to LOS height if available
}

Position WorldObject::GetRandomPoint(Position const& srcPos, float distance) const
{
    float x, y, z;
    GetRandomPoint(srcPos, distance, x, y, z);
    return Position(x, y, z, GetOrientation());
}

void WorldObject::UpdateGroundPositionZ(float x, float y, float &z) const
{
    float new_z = GetMapHeight(x, y, z);
    if (new_z > INVALID_HEIGHT)
        z = new_z + (isType(TYPEMASK_UNIT) ? static_cast<Unit const*>(this)->GetHoverOffset() : 0.0f);
}

void WorldObject::UpdateAllowedPositionZ(float x, float y, float &z, float* groundZ) const
{
    // TODO: Allow transports to be part of dynamic vmap tree
    if (GetTransport())
    {
        if (groundZ)
            *groundZ = z;

        return;
    }

    if (Unit const* unit = ToUnit())
    {
        if (!unit->CanFly())
        {
            bool canSwim = unit->CanSwim();
            float ground_z = z;
            float max_z;
            if (canSwim)
                max_z = GetMapWaterOrGroundLevel(x, y, z, &ground_z);
            else
                max_z = ground_z = GetMapHeight(x, y, z);

            if (max_z > INVALID_HEIGHT)
            {
                // hovering units cannot go below their hover height
                float hoverOffset = unit->GetHoverOffset();
                max_z += hoverOffset;
                ground_z += hoverOffset;

                if (z > max_z)
                    z = max_z;
                else if (z < ground_z)
                    z = ground_z;
            }

            if (groundZ)
                *groundZ = ground_z;
        }
        else
        {
            float ground_z = GetMapHeight(x, y, z) + unit->GetHoverOffset();
            if (z < ground_z)
                z = ground_z;

            if (groundZ)
               *groundZ = ground_z;
        }
    }
    else
    {
        float ground_z = GetMapHeight(x, y, z);
        if (ground_z > INVALID_HEIGHT)
            z = ground_z;

        if (groundZ)
            *groundZ = ground_z;
    }
}

float WorldObject::GetGridActivationRange() const
{
    if (isActiveObject())
    {
        if (GetTypeId() == TYPEID_PLAYER && ToPlayer()->GetCinematicMgr()->IsOnCinematic())
            return std::max(DEFAULT_VISIBILITY_INSTANCE, GetMap()->GetVisibilityRange());

        return GetMap()->GetVisibilityRange();
    }

    if (Creature const* thisCreature = ToCreature())
        return thisCreature->m_SightDistance;

    return 0.0f;
}

float WorldObject::GetVisibilityRange() const
{
    if (IsVisibilityOverridden() && !ToPlayer())
        return *m_visibilityDistanceOverride;
    else if (IsFarVisible() && !ToPlayer())
        return MAX_VISIBILITY_DISTANCE;
    else
        return GetMap()->GetVisibilityRange();
}

float WorldObject::GetSightRange(WorldObject const* target) const
{
    if (ToUnit())
    {
        if (ToPlayer())
        {
            if (target && target->IsVisibilityOverridden() && !target->ToPlayer())
                return *target->m_visibilityDistanceOverride;
            else if (target && target->IsFarVisible() && !target->ToPlayer())
                return MAX_VISIBILITY_DISTANCE;
            else if (ToPlayer()->GetCinematicMgr()->IsOnCinematic())
                return DEFAULT_VISIBILITY_INSTANCE;
            else
                return GetMap()->GetVisibilityRange();
        }
        else if (ToCreature())
            return ToCreature()->m_SightDistance;
        else
            return SIGHT_RANGE_UNIT;
    }

    if (ToDynObject() && isActiveObject())
    {
        return GetMap()->GetVisibilityRange();
    }

    return 0.0f;
}

bool WorldObject::CheckPrivateObjectOwnerVisibility(WorldObject const* seer) const
{
    if (!IsPrivateObject())
        return true;

    // Owner of this private object
    if (_privateObjectOwner == seer->GetGUID())
        return true;

    // Another private object of the same owner
    if (_privateObjectOwner == seer->GetPrivateObjectOwner())
        return true;

    if (Player const* playerSeer = seer->ToPlayer())
        if (playerSeer->IsInGroup(_privateObjectOwner))
            return true;

    return false;
}

SmoothPhasing* WorldObject::GetOrCreateSmoothPhasing()
{
    if (!_smoothPhasing)
        _smoothPhasing = std::make_unique<SmoothPhasing>();

    return _smoothPhasing.get();
}

bool WorldObject::CanSeeOrDetect(WorldObject const* obj, bool ignoreStealth, bool distanceCheck, bool checkAlert) const
{
    if (this == obj)
        return true;

    if (obj->IsNeverVisibleFor(this) || CanNeverSee(obj))
        return false;

    if (obj->IsAlwaysVisibleFor(this) || CanAlwaysSee(obj))
        return true;

    if (!obj->CheckPrivateObjectOwnerVisibility(this))
        return false;

    if (SmoothPhasing const* smoothPhasing = obj->GetSmoothPhasing())
        if (smoothPhasing->IsBeingReplacedForSeer(GetGUID()))
            return false;

    if (!sConditionMgr->IsObjectMeetingVisibilityByObjectIdConditions(obj->GetTypeId(), obj->GetEntry(), const_cast<WorldObject*>(this)))
        return false;

    bool corpseVisibility = false;
    if (distanceCheck)
    {
        bool corpseCheck = false;
        if (Player const* thisPlayer = ToPlayer())
        {
            if (thisPlayer->isDead() && thisPlayer->GetHealth() > 0 && // Cheap way to check for ghost state
                !(obj->m_serverSideVisibility.GetValue(SERVERSIDE_VISIBILITY_GHOST) & m_serverSideVisibility.GetValue(SERVERSIDE_VISIBILITY_GHOST) & GHOST_VISIBILITY_GHOST))
            {
                if (Corpse* corpse = thisPlayer->GetCorpse())
                {
                    corpseCheck = true;
                    if (corpse->IsWithinDist(thisPlayer, GetSightRange(obj), false))
                        if (corpse->IsWithinDist(obj, GetSightRange(obj), false))
                            corpseVisibility = true;
                }
            }

            if (Unit const* target = obj->ToUnit())
            {
                // Don't allow to detect vehicle accessories if you can't see vehicle
                if (Unit const* vehicle = target->GetVehicleBase())
                    if (!thisPlayer->HaveAtClient(vehicle))
                        return false;
            }
        }

        WorldObject const* viewpoint = this;
        if (Player const* player = ToPlayer())
            viewpoint = player->GetViewpoint();

        if (!viewpoint)
            viewpoint = this;

        if (!corpseCheck && !viewpoint->IsWithinDist(obj, GetSightRange(obj), false))
            return false;
    }

    // GM visibility off or hidden NPC
    if (!obj->m_serverSideVisibility.GetValue(SERVERSIDE_VISIBILITY_GM))
    {
        // Stop checking other things for GMs
        if (m_serverSideVisibilityDetect.GetValue(SERVERSIDE_VISIBILITY_GM))
            return true;
    }
    else
        return m_serverSideVisibilityDetect.GetValue(SERVERSIDE_VISIBILITY_GM) >= obj->m_serverSideVisibility.GetValue(SERVERSIDE_VISIBILITY_GM);

    // Ghost players, Spirit Healers, and some other NPCs
    if (!corpseVisibility && !(obj->m_serverSideVisibility.GetValue(SERVERSIDE_VISIBILITY_GHOST) & m_serverSideVisibilityDetect.GetValue(SERVERSIDE_VISIBILITY_GHOST)))
    {
        // Alive players can see dead players in some cases, but other objects can't do that
        if (Player const* thisPlayer = ToPlayer())
        {
            if (Player const* objPlayer = obj->ToPlayer())
            {
                if (!thisPlayer->IsGroupVisibleFor(objPlayer))
                    return false;
            }
            else
                return false;
        }
        else
            return false;
    }

    if (obj->IsInvisibleDueToDespawn())
        return false;

    if (!CanDetect(obj, ignoreStealth, checkAlert))
        return false;

    return true;
}

bool WorldObject::CanNeverSee(WorldObject const* obj) const
{
    return GetMap() != obj->GetMap() || !IsInPhase(obj);
}

bool WorldObject::CanDetect(WorldObject const* obj, bool ignoreStealth, bool checkAlert) const
{
    WorldObject const* seer = this;

    // If a unit is possessing another one, it uses the detection of the latter
    // Pets don't have detection, they use the detection of their masters
    if (Unit const* thisUnit = ToUnit())
    {
        if (thisUnit->isPossessing())
        {
            if (Unit* charmed = thisUnit->GetCharmed())
                seer = charmed;
        }
        else if (Unit* controller = thisUnit->GetCharmerOrOwner())
            seer = controller;
    }

    if (obj->IsAlwaysDetectableFor(seer))
        return true;

    if (!ignoreStealth && !seer->CanDetectInvisibilityOf(obj))
        return false;

    if (!ignoreStealth && !seer->CanDetectStealthOf(obj, checkAlert))
        return false;

    return true;
}

bool WorldObject::CanDetectInvisibilityOf(WorldObject const* obj) const
{
    uint32 mask = obj->m_invisibility.GetFlags() & m_invisibilityDetect.GetFlags();

    // Check for not detected types
    if (mask != obj->m_invisibility.GetFlags())
        return false;

    for (uint32 i = 0; i < TOTAL_INVISIBILITY_TYPES; ++i)
    {
        if (!(mask & (1 << i)))
            continue;

        int32 objInvisibilityValue = obj->m_invisibility.GetValue(InvisibilityType(i));
        int32 ownInvisibilityDetectValue = m_invisibilityDetect.GetValue(InvisibilityType(i));

        // Too low value to detect
        if (ownInvisibilityDetectValue < objInvisibilityValue)
            return false;
    }

    return true;
}

bool WorldObject::CanDetectStealthOf(WorldObject const* obj, bool checkAlert) const
{
    // Combat reach is the minimal distance (both in front and behind),
    //   and it is also used in the range calculation.
    // One stealth point increases the visibility range by 0.3 yard.

    if (!obj->m_stealth.GetFlags())
        return true;

    float distance = GetExactDist(obj);
    float combatReach = 0.0f;

    Unit const* unit = ToUnit();
    if (unit)
        combatReach = unit->GetCombatReach();

    if (distance < combatReach)
        return true;

    // Only check back for units, it does not make sense for gameobjects
    if (unit && !HasInArc(float(M_PI), obj))
        return false;

    // Traps should detect stealth always
    if (GameObject const* go = ToGameObject())
        if (go->GetGoType() == GAMEOBJECT_TYPE_TRAP)
            return true;

    GameObject const* go = obj->ToGameObject();
    for (uint32 i = 0; i < TOTAL_STEALTH_TYPES; ++i)
    {
        if (!(obj->m_stealth.GetFlags() & (1 << i)))
            continue;

        if (unit && unit->HasAuraTypeWithMiscvalue(SPELL_AURA_DETECT_STEALTH, i))
            return true;

        // Starting points
        int32 detectionValue = 30;

        // Level difference: 5 point / level, starting from level 1.
        // There may be spells for this and the starting points too, but
        // not in the DBCs of the client.
        detectionValue += int32(GetLevelForTarget(obj) - 1) * 5;

        // Apply modifiers
        detectionValue += m_stealthDetect.GetValue(StealthType(i));
        if (go)
            if (Unit* owner = go->GetOwner())
                detectionValue -= int32(owner->GetLevelForTarget(this) - 1) * 5;

        detectionValue -= obj->m_stealth.GetValue(StealthType(i));

        // Calculate max distance
        float visibilityRange = float(detectionValue) * 0.3f + combatReach;

        // If this unit is an NPC then player detect range doesn't apply
        if (unit && unit->GetTypeId() == TYPEID_PLAYER && visibilityRange > MAX_PLAYER_STEALTH_DETECT_RANGE)
            visibilityRange = MAX_PLAYER_STEALTH_DETECT_RANGE;

        // When checking for alert state, look 8% further, and then 1.5 yards more than that.
        if (checkAlert)
            visibilityRange += (visibilityRange * 0.08f) + 1.5f;

        // If checking for alert, and creature's visibility range is greater than aggro distance, No alert
        Unit const* tunit = obj->ToUnit();
        if (checkAlert && unit && unit->ToCreature() && visibilityRange >= unit->ToCreature()->GetAttackDistance(tunit) + unit->ToCreature()->m_CombatDistance)
            return false;

        if (distance > visibilityRange)
            return false;
    }

    return true;
}

void WorldObject::SendMessageToSet(WorldPacket const* data, bool self) const
{
    if (IsInWorld())
        SendMessageToSetInRange(data, GetVisibilityRange(), self);
}

void WorldObject::SendMessageToSetInRange(WorldPacket const* data, float dist, bool /*self*/) const
{
    Trinity::PacketSenderRef sender(data);
    Trinity::MessageDistDeliverer<Trinity::PacketSenderRef> notifier(this, sender, dist);
    Cell::VisitWorldObjects(this, notifier, dist);
}

void WorldObject::SendMessageToSet(WorldPacket const* data, Player const* skipped_rcvr) const
{
    Trinity::PacketSenderRef sender(data);
    Trinity::MessageDistDeliverer<Trinity::PacketSenderRef> notifier(this, sender, GetVisibilityRange(), false, skipped_rcvr);
    Cell::VisitWorldObjects(this, notifier, GetVisibilityRange());
}

struct CombatLogSender
{
    WorldPackets::CombatLog::CombatLogServerPacket const* i_message;

    explicit CombatLogSender(WorldPackets::CombatLog::CombatLogServerPacket* msg)
        : i_message(msg)
    {
        msg->Write();
    }

    void operator()(Player const* player) const
    {
        if (player->IsAdvancedCombatLoggingEnabled())
            player->SendDirectMessage(i_message->GetFullLogPacket());
        else
            player->SendDirectMessage(i_message->GetBasicLogPacket());
    }
};

void WorldObject::SendCombatLogMessage(WorldPackets::CombatLog::CombatLogServerPacket* combatLog) const
{
    CombatLogSender combatLogSender(combatLog);

    if (Player const* self = ToPlayer())
        combatLogSender(self);

    Trinity::MessageDistDeliverer<CombatLogSender> notifier(this, combatLogSender, GetVisibilityRange());
    Cell::VisitWorldObjects(this, notifier, GetVisibilityRange());
}

void WorldObject::SetMap(Map* map)
{
    ASSERT(map);
    ASSERT(!IsInWorld());
    if (m_currMap == map) // command add npc: first create, than loadfromdb
        return;
    if (m_currMap)
    {
        TC_LOG_FATAL("misc", "WorldObject::SetMap: obj %u new map %u %u, old map %u %u", (uint32)GetTypeId(), map->GetId(), map->GetInstanceId(), m_currMap->GetId(), m_currMap->GetInstanceId());
        ABORT();
    }
    m_currMap = map;
    m_mapId = map->GetId();
    m_InstanceId = map->GetInstanceId();
    if (IsWorldObject())
        m_currMap->AddWorldObject(this);
}

void WorldObject::ResetMap()
{
    ASSERT(m_currMap);
    ASSERT(!IsInWorld());
    if (IsWorldObject())
        m_currMap->RemoveWorldObject(this);
    m_currMap = nullptr;
    //maybe not for corpse
    //m_mapId = 0;
    //m_InstanceId = 0;
}

void WorldObject::AddObjectToRemoveList()
{
    Map* map = FindMap();
    if (!map)
    {
        TC_LOG_ERROR("misc", "Object %s at attempt add to move list not have valid map (Id: %u).", GetGUID().ToString().c_str(), GetMapId());
        return;
    }

    map->AddObjectToRemoveList(this);
}

TempSummon* Map::SummonCreature(uint32 entry, Position const& pos, SummonPropertiesEntry const* properties /*= nullptr*/, uint32 duration /*= 0*/, WorldObject* summoner /*= nullptr*/, uint32 spellId /*= 0*/, uint32 vehId /*= 0*/, ObjectGuid privateObjectOwner /*= ObjectGuid::Empty*/, SmoothPhasingInfo const* smoothPhasingInfo /* = nullptr*/)
{
    uint32 mask = UNIT_MASK_SUMMON;
    if (properties)
    {
        switch (properties->Control)
        {
            case SUMMON_CATEGORY_PET:
                mask = UNIT_MASK_GUARDIAN;
                break;
            case SUMMON_CATEGORY_PUPPET:
                mask = UNIT_MASK_PUPPET;
                break;
            case SUMMON_CATEGORY_VEHICLE:
                mask = UNIT_MASK_MINION;
                break;
            case SUMMON_CATEGORY_WILD:
            case SUMMON_CATEGORY_ALLY:
            case SUMMON_CATEGORY_UNK:
            {
                switch (SummonTitle(properties->Title))
                {
                case SummonTitle::Minion:
                case SummonTitle::Guardian:
                case SummonTitle::Runeblade:
                    mask = UNIT_MASK_GUARDIAN;
                    break;
                case SummonTitle::Totem:
                case SummonTitle::Lightwell:
                    mask = UNIT_MASK_TOTEM;
                    break;
                case SummonTitle::Vehicle:
                case SummonTitle::Mount:
                    mask = UNIT_MASK_SUMMON;
                    break;
                case SummonTitle::Companion:
                    mask = UNIT_MASK_MINION;
                    break;
                default:
                    if (properties->GetFlags().HasFlag(SummonPropertiesFlags::JoinSummonerSpawnGroup))
                        mask = UNIT_MASK_GUARDIAN;
                    break;
                }
                break;
            }
            default:
                return nullptr;
        }
    }

    Unit* summonerUnit = summoner ? summoner->ToUnit() : nullptr;

    TempSummon* summon = nullptr;
    switch (mask)
    {
        case UNIT_MASK_SUMMON:
            summon = new TempSummon(properties, summoner, false);
            break;
        case UNIT_MASK_GUARDIAN:
            summon = new Guardian(properties, summonerUnit, false);
            break;
        case UNIT_MASK_PUPPET:
            summon = new Puppet(properties, summonerUnit);
            break;
        case UNIT_MASK_TOTEM:
            summon = new Totem(properties, summonerUnit);
            break;
        case UNIT_MASK_MINION:
            summon = new Minion(properties, summonerUnit, false);
            break;
    }

    if (!summon->Create(GenerateLowGuid<HighGuid::Creature>(), this, entry, pos, nullptr, vehId, true))
    {
        delete summon;
        return nullptr;
    }

    Transport* transport = summoner ? summoner->GetTransport() : nullptr;
    if (transport)
    {
        float x, y, z, o;
        pos.GetPosition(x, y, z, o);
        transport->CalculatePassengerOffset(x, y, z, &o);
        summon->m_movementInfo.transport.pos.Relocate(x, y, z, o);

        // This object must be added to transport before adding to map for the client to properly display it
        transport->AddPassenger(summon);
    }

    if (summoner && !(properties && properties->GetFlags().HasFlag(SummonPropertiesFlags::IgnoreSummonerPhase)))
        PhasingHandler::InheritPhaseShift(summon, summoner);

    summon->SetCreatedBySpell(spellId);

    summon->SetHomePosition(pos);

    summon->InitStats(duration);

    summon->SetPrivateObjectOwner(privateObjectOwner);

    if (smoothPhasingInfo)
    {
        if (summoner && smoothPhasingInfo->ReplaceObject)
        {
            if (WorldObject* replacedObject = ObjectAccessor::GetWorldObject(*summoner, *smoothPhasingInfo->ReplaceObject))
            {
                SmoothPhasingInfo originalSmoothPhasingInfo = *smoothPhasingInfo;
                originalSmoothPhasingInfo.ReplaceObject = summon->GetGUID();
                replacedObject->GetOrCreateSmoothPhasing()->SetViewerDependentInfo(privateObjectOwner, originalSmoothPhasingInfo);

                summon->SetDemonCreatorGUID(privateObjectOwner);
            }
        }

        summon->GetOrCreateSmoothPhasing()->SetSingleInfo(*smoothPhasingInfo);
    }

    if (!AddToMap(summon->ToCreature()))
    {
        // Returning false will cause the object to be deleted - remove from transport
        if (transport)
            transport->RemovePassenger(summon);

        delete summon;
        return nullptr;
    }

    summon->InitSummon();

    // call MoveInLineOfSight for nearby creatures
    Trinity::AIRelocationNotifier notifier(*summon);
    Cell::VisitAllObjects(summon, notifier, GetVisibilityRange());

    return summon;
}

/**
* Summons group of creatures.
*
* @param group Id of group to summon.
* @param list  List to store pointers to summoned creatures.
*/

void Map::SummonCreatureGroup(uint8 group, std::list<TempSummon*>* list /*= nullptr*/)
{
    std::vector<TempSummonData> const* data = sObjectMgr->GetSummonGroup(GetId(), SUMMONER_TYPE_MAP, group);
    if (!data)
        return;

    for (std::vector<TempSummonData>::const_iterator itr = data->begin(); itr != data->end(); ++itr)
        if (TempSummon* summon = SummonCreature(itr->entry, itr->pos, nullptr, itr->time))
            if (list)
                list->push_back(summon);
}

void WorldObject::SetZoneScript()
{
    if (Map* map = FindMap())
    {
        if (InstanceMap* instanceMap = map->ToInstanceMap())
            m_zoneScript = reinterpret_cast<ZoneScript*>(instanceMap->GetInstanceScript());
        else if (!map->IsBattlegroundOrArena())
        {
            if (Battlefield* bf = sBattlefieldMgr->GetBattlefieldToZoneId(GetZoneId()))
                m_zoneScript = bf;
            else
                m_zoneScript = sOutdoorPvPMgr->GetZoneScript(GetZoneId());
        }
    }
}

Scenario* WorldObject::GetScenario() const
{
    if (IsInWorld())
        if (InstanceMap* instanceMap = GetMap()->ToInstanceMap())
            return instanceMap->GetInstanceScenario();

    return nullptr;
}

TempSummon* WorldObject::SummonCreature(uint32 entry, Position const& pos, TempSummonType despawnType /*= TEMPSUMMON_MANUAL_DESPAWN*/, Milliseconds despawnTime /*= 0s*/, uint32 vehId /*= 0*/, uint32 spellId /*= 0*/, ObjectGuid privateObjectOwner /* = ObjectGuid::Empty */)
{
    if (Map* map = FindMap())
    {
        if (TempSummon* summon = map->SummonCreature(entry, pos, nullptr, despawnTime.count(), this, spellId, vehId, privateObjectOwner))
        {
            summon->SetTempSummonType(despawnType);
            return summon;
        }
    }

    return nullptr;
}

TempSummon* WorldObject::SummonCreature(uint32 id, float x, float y, float z, float o /*= 0*/, TempSummonType despawnType /*= TEMPSUMMON_MANUAL_DESPAWN*/, Milliseconds despawnTime /*= 0s*/, ObjectGuid privateObjectOwner /* = ObjectGuid::Empty */)
{
    if (!x && !y && !z)
        GetClosePoint(x, y, z, GetCombatReach());
    if (!o)
        o = GetOrientation();
    return SummonCreature(id, { x,y,z,o }, despawnType, despawnTime, 0, 0, privateObjectOwner);
}

TempSummon* WorldObject::SummonPersonalClone(Position const& pos, TempSummonType despawnType /*= TEMPSUMMON_MANUAL_DESPAWN*/, Milliseconds despawnTime /*= 0s*/, uint32 vehId /*= 0*/, uint32 spellId /*= 0*/, Player* privateObjectOwner /*= nullptr*/)
{
    ASSERT(privateObjectOwner);

    if (Map* map = FindMap())
    {
        SmoothPhasingInfo smoothPhasingInfo{GetGUID(), true, true};
        if (TempSummon* summon = map->SummonCreature(GetEntry(), pos, nullptr, despawnTime.count(), privateObjectOwner, spellId, vehId, privateObjectOwner->GetGUID(), &smoothPhasingInfo))
        {
            summon->SetTempSummonType(despawnType);
            return summon;
        }
    }

    return nullptr;
}

GameObject* WorldObject::SummonGameObject(uint32 entry, Position const& pos, QuaternionData const& rot, Seconds respawnTime, GOSummonType summonType)
{
    if (!IsInWorld())
        return nullptr;

    GameObjectTemplate const* goinfo = sObjectMgr->GetGameObjectTemplate(entry);
    if (!goinfo)
    {
        TC_LOG_ERROR("sql.sql", "Gameobject template %u not found in database!", entry);
        return nullptr;
    }

    Map* map = GetMap();
    GameObject* go = GameObject::CreateGameObject(entry, map, pos, rot, 255, GO_STATE_READY);
    if (!go)
        return nullptr;

    PhasingHandler::InheritPhaseShift(go, this);

    go->SetRespawnTime(respawnTime.count());
    if (GetTypeId() == TYPEID_PLAYER || (GetTypeId() == TYPEID_UNIT && summonType == GO_SUMMON_TIMED_OR_CORPSE_DESPAWN)) //not sure how to handle this
        ToUnit()->AddGameObject(go);
    else
        go->SetSpawnedByDefault(false);

    map->AddToMap(go);
    return go;
}

GameObject* WorldObject::SummonGameObject(uint32 entry, float x, float y, float z, float ang, QuaternionData const& rot, Seconds respawnTime, GOSummonType summonType)
{
    if (!x && !y && !z)
    {
        GetClosePoint(x, y, z, GetCombatReach());
        ang = GetOrientation();
    }

    Position pos(x, y, z, ang);
    return SummonGameObject(entry, pos, rot, respawnTime, summonType);
}

Creature* WorldObject::SummonTrigger(float x, float y, float z, float ang, Milliseconds despawnTime, CreatureAI* (*GetAI)(Creature*))
{
    TempSummonType summonType = (despawnTime == 0s) ? TEMPSUMMON_DEAD_DESPAWN : TEMPSUMMON_TIMED_DESPAWN;
    Creature* summon = SummonCreature(WORLD_TRIGGER, x, y, z, ang, summonType, despawnTime);
    if (!summon)
        return nullptr;

    //summon->SetName(GetName());
    if (GetTypeId() == TYPEID_PLAYER || GetTypeId() == TYPEID_UNIT)
    {
        summon->SetFaction(((Unit*)this)->GetFaction());
        summon->SetLevel(((Unit*)this)->GetLevel());
    }

    if (GetAI)
        summon->AIM_Initialize(GetAI(summon));
    return summon;
}

/**
* Summons group of creatures. Should be called only by instances of Creature and GameObject classes.
*
* @param group Id of group to summon.
* @param list  List to store pointers to summoned creatures.
*/
void WorldObject::SummonCreatureGroup(uint8 group, std::list<TempSummon*>* list /*= nullptr*/)
{
    ASSERT((GetTypeId() == TYPEID_GAMEOBJECT || GetTypeId() == TYPEID_UNIT) && "Only GOs and creatures can summon npc groups!");

    std::vector<TempSummonData> const* data = sObjectMgr->GetSummonGroup(GetEntry(), GetTypeId() == TYPEID_GAMEOBJECT ? SUMMONER_TYPE_GAMEOBJECT : SUMMONER_TYPE_CREATURE, group);
    if (!data)
    {
        TC_LOG_WARN("scripts", "%s (%s) tried to summon non-existing summon group %u.", GetName().c_str(), GetGUID().ToString().c_str(), group);
        return;
    }

    for (std::vector<TempSummonData>::const_iterator itr = data->begin(); itr != data->end(); ++itr)
        if (TempSummon* summon = SummonCreature(itr->entry, itr->pos, itr->type, Milliseconds(itr->time)))
            if (list)
                list->push_back(summon);
}

Creature* WorldObject::FindNearestCreature(uint32 entry, float range, bool alive) const
{
    Creature* creature = nullptr;
    Trinity::NearestCreatureEntryWithLiveStateInObjectRangeCheck checker(*this, entry, alive, range);
    Trinity::CreatureLastSearcher<Trinity::NearestCreatureEntryWithLiveStateInObjectRangeCheck> searcher(this, creature, checker);
    Cell::VisitAllObjects(this, searcher, range);
    return creature;
}

GameObject* WorldObject::FindNearestGameObject(uint32 entry, float range, bool spawnedOnly) const
{
    GameObject* go = nullptr;
    Trinity::NearestGameObjectEntryInObjectRangeCheck checker(*this, entry, range, spawnedOnly);
    Trinity::GameObjectLastSearcher<Trinity::NearestGameObjectEntryInObjectRangeCheck> searcher(this, go, checker);
    Cell::VisitGridObjects(this, searcher, range);
    return go;
}

GameObject* WorldObject::FindNearestUnspawnedGameObject(uint32 entry, float range) const
{
    GameObject* go = nullptr;
    Trinity::NearestUnspawnedGameObjectEntryInObjectRangeCheck checker(*this, entry, range);
    Trinity::GameObjectLastSearcher<Trinity::NearestUnspawnedGameObjectEntryInObjectRangeCheck> searcher(this, go, checker);
    Cell::VisitGridObjects(this, searcher, range);
    return go;
}

GameObject* WorldObject::FindNearestGameObjectOfType(GameobjectTypes type, float range) const
{
    GameObject* go = nullptr;
    Trinity::NearestGameObjectTypeInObjectRangeCheck checker(*this, type, range);
    Trinity::GameObjectLastSearcher<Trinity::NearestGameObjectTypeInObjectRangeCheck> searcher(this, go, checker);
    Cell::VisitGridObjects(this, searcher, range);
    return go;
}

Player* WorldObject::SelectNearestPlayer(float distance) const
{
    Player* target = nullptr;

    Trinity::NearestPlayerInObjectRangeCheck checker(this, distance);
    Trinity::PlayerLastSearcher<Trinity::NearestPlayerInObjectRangeCheck> searcher(this, target, checker);
    Cell::VisitGridObjects(this, searcher, distance);

    return target;
}

ObjectGuid WorldObject::GetCharmerOrOwnerOrOwnGUID() const
{
    ObjectGuid guid = GetCharmerOrOwnerGUID();
    if (!guid.IsEmpty())
        return guid;
    return GetGUID();
}

Unit* WorldObject::GetOwner() const
{
    return ObjectAccessor::GetUnit(*this, GetOwnerGUID());
}

Unit* WorldObject::GetCharmerOrOwner() const
{
    if (Unit const* unit = ToUnit())
        return unit->GetCharmerOrOwner();
    else if (GameObject const* go = ToGameObject())
        return go->GetOwner();

    return nullptr;
}

Unit* WorldObject::GetCharmerOrOwnerOrSelf() const
{
    if (Unit* u = GetCharmerOrOwner())
        return u;

    return const_cast<WorldObject*>(this)->ToUnit();
}

Player* WorldObject::GetCharmerOrOwnerPlayerOrPlayerItself() const
{
    ObjectGuid guid = GetCharmerOrOwnerGUID();
    if (guid.IsPlayer())
        return ObjectAccessor::GetPlayer(*this, guid);

    return const_cast<WorldObject*>(this)->ToPlayer();
}

Player* WorldObject::GetAffectingPlayer() const
{
    if (!GetCharmerOrOwnerGUID())
        return const_cast<WorldObject*>(this)->ToPlayer();

    if (Unit* owner = GetCharmerOrOwner())
        return owner->GetCharmerOrOwnerPlayerOrPlayerItself();

    return nullptr;
}

Player* WorldObject::GetSpellModOwner() const
{
    if (Player* player = const_cast<WorldObject*>(this)->ToPlayer())
        return player;

    if (GetTypeId() == TYPEID_UNIT)
    {
        Creature const* creature = ToCreature();
        if (creature->IsPet() || creature->IsTotem())
        {
            if (Unit* owner = creature->GetOwner())
                return owner->ToPlayer();
        }
    }
    else if (GetTypeId() == TYPEID_GAMEOBJECT)
    {
        GameObject const* go = ToGameObject();
        if (Unit* owner = go->GetOwner())
            return owner->ToPlayer();
    }

    return nullptr;
}

// function uses real base points (typically value - 1)
int32 WorldObject::CalculateSpellDamage(Unit const* target, SpellEffectInfo const& spellEffectInfo, int32 const* basePoints /*= nullptr*/, float* variance /*= nullptr*/, uint32 castItemId /*= 0*/, int32 itemLevel /*= -1*/) const
{
    if (variance)
        *variance = 0.0f;

    return spellEffectInfo.CalcValue(this, basePoints, target, variance, castItemId, itemLevel);
}

float WorldObject::GetSpellMaxRangeForTarget(Unit const* target, SpellInfo const* spellInfo) const
{
    if (!spellInfo->RangeEntry)
        return 0.f;

    if (spellInfo->RangeEntry->RangeMax[0] == spellInfo->RangeEntry->RangeMax[1])
        return spellInfo->GetMaxRange();

    if (!target)
        return spellInfo->GetMaxRange(true);

    return spellInfo->GetMaxRange(!IsHostileTo(target));
}

float WorldObject::GetSpellMinRangeForTarget(Unit const* target, SpellInfo const* spellInfo) const
{
    if (!spellInfo->RangeEntry)
        return 0.f;

    if (spellInfo->RangeEntry->RangeMin[0] == spellInfo->RangeEntry->RangeMin[1])
        return spellInfo->GetMinRange();

    if (!target)
        return spellInfo->GetMinRange(true);

    return spellInfo->GetMinRange(!IsHostileTo(target));
}

float WorldObject::ApplyEffectModifiers(SpellInfo const* spellInfo, uint8 effIndex, float value) const
{
    if (Player* modOwner = GetSpellModOwner())
    {
        modOwner->ApplySpellMod(spellInfo, SpellModOp::Points, value);
        switch (effIndex)
        {
            case EFFECT_0:
                modOwner->ApplySpellMod(spellInfo, SpellModOp::PointsIndex0, value);
                break;
            case EFFECT_1:
                modOwner->ApplySpellMod(spellInfo, SpellModOp::PointsIndex1, value);
                break;
            case EFFECT_2:
                modOwner->ApplySpellMod(spellInfo, SpellModOp::PointsIndex2, value);
                break;
            case EFFECT_3:
                modOwner->ApplySpellMod(spellInfo, SpellModOp::PointsIndex3, value);
                break;
            case EFFECT_4:
                modOwner->ApplySpellMod(spellInfo, SpellModOp::PointsIndex4, value);
                break;
        }
    }
    return value;
}

int32 WorldObject::CalcSpellDuration(SpellInfo const* spellInfo) const
{
    int32 comboPoints = 0;
    int32 maxComboPoints = 5;
    if (Unit const* unit = ToUnit())
    {
        comboPoints = unit->GetPower(POWER_COMBO_POINTS);
        maxComboPoints = unit->GetMaxPower(POWER_COMBO_POINTS);
    }

    int32 minduration = spellInfo->GetDuration();
    int32 maxduration = spellInfo->GetMaxDuration();

    int32 duration;
    if (comboPoints && minduration != -1 && minduration != maxduration)
        duration = minduration + int32((maxduration - minduration) * comboPoints / maxComboPoints);
    else
        duration = minduration;

    return duration;
}

int32 WorldObject::ModSpellDuration(SpellInfo const* spellInfo, WorldObject const* target, int32 duration, bool positive, uint32 effectMask) const
{
    // don't mod permanent auras duration
    if (duration < 0)
        return duration;

    // some auras are not affected by duration modifiers
    if (spellInfo->HasAttribute(SPELL_ATTR7_IGNORE_DURATION_MODS))
        return duration;

    // cut duration only of negative effects
    Unit const* unitTarget = target->ToUnit();
    if (!unitTarget)
        return duration;

    if (!positive)
    {
        int32 mechanicMask = spellInfo->GetSpellMechanicMaskByEffectMask(effectMask);
        auto mechanicCheck = [mechanicMask](AuraEffect const* aurEff) -> bool
        {
            if (mechanicMask & (1 << aurEff->GetMiscValue()))
                return true;
            return false;
        };

        // Find total mod value (negative bonus)
        int32 durationMod_always = unitTarget->GetTotalAuraModifier(SPELL_AURA_MECHANIC_DURATION_MOD, mechanicCheck);
        // Find max mod (negative bonus)
        int32 durationMod_not_stack = unitTarget->GetMaxNegativeAuraModifier(SPELL_AURA_MECHANIC_DURATION_MOD_NOT_STACK, mechanicCheck);

        // Select strongest negative mod
        int32 durationMod = std::min(durationMod_always, durationMod_not_stack);
        if (durationMod != 0)
            AddPct(duration, durationMod);

        // there are only negative mods currently
        durationMod_always = unitTarget->GetTotalAuraModifierByMiscValue(SPELL_AURA_MOD_AURA_DURATION_BY_DISPEL, spellInfo->Dispel);
        durationMod_not_stack = unitTarget->GetMaxNegativeAuraModifierByMiscValue(SPELL_AURA_MOD_AURA_DURATION_BY_DISPEL_NOT_STACK, spellInfo->Dispel);

        durationMod = std::min(durationMod_always, durationMod_not_stack);
        if (durationMod != 0)
            AddPct(duration, durationMod);
    }
    else
    {
        // else positive mods here, there are no currently
        // when there will be, change GetTotalAuraModifierByMiscValue to GetMaxPositiveAuraModifierByMiscValue

        // Mixology - duration boost
        if (unitTarget->GetTypeId() == TYPEID_PLAYER)
        {
            if (spellInfo->SpellFamilyName == SPELLFAMILY_POTION && (
                sSpellMgr->IsSpellMemberOfSpellGroup(spellInfo->Id, SPELL_GROUP_ELIXIR_BATTLE) ||
                sSpellMgr->IsSpellMemberOfSpellGroup(spellInfo->Id, SPELL_GROUP_ELIXIR_GUARDIAN)))
            {
                SpellEffectInfo const& effect = spellInfo->GetEffect(EFFECT_0);
                if (unitTarget->HasAura(53042) && unitTarget->HasSpell(effect.TriggerSpell))
                    duration *= 2;
            }
        }
    }

    return std::max(duration, 0);
}

void WorldObject::ModSpellCastTime(SpellInfo const* spellInfo, int32& castTime, Spell* spell /*= nullptr*/) const
{
    if (!spellInfo || castTime < 0)
        return;

    // called from caster
    if (Player* modOwner = GetSpellModOwner())
        modOwner->ApplySpellMod(spellInfo, SpellModOp::ChangeCastTime, castTime, spell);

    Unit const* unitCaster = ToUnit();
    if (!unitCaster)
        return;

    if (!(spellInfo->HasAttribute(SPELL_ATTR0_ABILITY) || spellInfo->HasAttribute(SPELL_ATTR0_TRADESPELL) || spellInfo->HasAttribute(SPELL_ATTR3_NO_DONE_BONUS)) &&
        ((GetTypeId() == TYPEID_PLAYER && spellInfo->SpellFamilyName) || GetTypeId() == TYPEID_UNIT))
        castTime = unitCaster->CanInstantCast() ? 0 : int32(float(castTime) * unitCaster->m_unitData->ModCastingSpeed);
    else if (spellInfo->HasAttribute(SPELL_ATTR0_REQ_AMMO) && !spellInfo->HasAttribute(SPELL_ATTR2_AUTOREPEAT_FLAG))
        castTime = int32(float(castTime) * unitCaster->m_modAttackSpeedPct[RANGED_ATTACK]);
    else if (IsPartOfSkillLine(SKILL_COOKING, spellInfo->Id) && unitCaster->HasAura(67556)) // cooking with Chef Hat.
        castTime = 500;
}

void WorldObject::ModSpellDurationTime(SpellInfo const* spellInfo, int32& duration, Spell* spell /*= nullptr*/) const
{
    if (!spellInfo || duration < 0)
        return;

    if (spellInfo->IsChanneled() && !spellInfo->HasAttribute(SPELL_ATTR5_HASTE_AFFECT_DURATION))
        return;

    // called from caster
    if (Player* modOwner = GetSpellModOwner())
        modOwner->ApplySpellMod(spellInfo, SpellModOp::ChangeCastTime, duration, spell);

    Unit const* unitCaster = ToUnit();
    if (!unitCaster)
        return;

    if (!(spellInfo->HasAttribute(SPELL_ATTR0_ABILITY) || spellInfo->HasAttribute(SPELL_ATTR0_TRADESPELL) || spellInfo->HasAttribute(SPELL_ATTR3_NO_DONE_BONUS)) &&
        ((GetTypeId() == TYPEID_PLAYER && spellInfo->SpellFamilyName) || GetTypeId() == TYPEID_UNIT))
        duration = int32(float(duration) * unitCaster->m_unitData->ModCastingSpeed);
    else if (spellInfo->HasAttribute(SPELL_ATTR0_REQ_AMMO) && !spellInfo->HasAttribute(SPELL_ATTR2_AUTOREPEAT_FLAG))
        duration = int32(float(duration) * unitCaster->m_modAttackSpeedPct[RANGED_ATTACK]);
}

float WorldObject::MeleeSpellMissChance(Unit const* /*victim*/, WeaponAttackType /*attType*/, SpellInfo const* /*spellInfo*/) const
{
    return 0.0f;
}

SpellMissInfo WorldObject::MeleeSpellHitResult(Unit* /*victim*/, SpellInfo const* /*spellInfo*/) const
{
    return SPELL_MISS_NONE;
}

SpellMissInfo WorldObject::MagicSpellHitResult(Unit* victim, SpellInfo const* spellInfo) const
{
    // Can`t miss on dead target (on skinning for example)
    if (!victim->IsAlive() && victim->GetTypeId() != TYPEID_PLAYER)
        return SPELL_MISS_NONE;

    float missChance = [&]()
    {
        if (spellInfo->HasAttribute(SPELL_ATTR7_NO_ATTACK_MISS))
            return 0.0f;

        SpellSchoolMask schoolMask = spellInfo->GetSchoolMask();
        // PvP - PvE spell misschances per leveldif > 2
        int32 lchance = victim->GetTypeId() == TYPEID_PLAYER ? 7 : 11;
        int32 thisLevel = GetLevelForTarget(victim);
        if (GetTypeId() == TYPEID_UNIT && ToCreature()->IsTrigger())
            thisLevel = std::max<int32>(thisLevel, spellInfo->SpellLevel);
        int32 leveldif = int32(victim->GetLevelForTarget(this)) - thisLevel;
        int32 levelBasedHitDiff = leveldif;

        // Base hit chance from attacker and victim levels
        int32 modHitChance = 100;
        if (levelBasedHitDiff >= 0)
        {
            if (victim->GetTypeId() != TYPEID_PLAYER)
            {
                modHitChance = 94 - 3 * std::min(levelBasedHitDiff, 3);
                levelBasedHitDiff -= 3;
            }
            else
            {
                modHitChance = 96 - std::min(levelBasedHitDiff, 2);
                levelBasedHitDiff -= 2;
            }
            if (levelBasedHitDiff > 0)
                modHitChance -= lchance * std::min(levelBasedHitDiff, 7);
        }
        else
            modHitChance = 97 - levelBasedHitDiff;

        // Spellmod from SpellModOp::HitChance
        if (Player* modOwner = GetSpellModOwner())
            modOwner->ApplySpellMod(spellInfo, SpellModOp::HitChance, modHitChance);

        // Spells with SPELL_ATTR3_IGNORE_HIT_RESULT will ignore target's avoidance effects
        if (!spellInfo->HasAttribute(SPELL_ATTR3_IGNORE_HIT_RESULT))
        {
            // Chance hit from victim SPELL_AURA_MOD_ATTACKER_SPELL_HIT_CHANCE auras
            modHitChance += victim->GetTotalAuraModifierByMiscMask(SPELL_AURA_MOD_ATTACKER_SPELL_HIT_CHANCE, schoolMask);
        }

        float HitChance = modHitChance;
        // Increase hit chance from attacker SPELL_AURA_MOD_SPELL_HIT_CHANCE and attacker ratings
        if (Unit const* unit = ToUnit())
            HitChance += unit->m_modSpellHitChance;

        RoundToInterval(HitChance, 0.0f, 100.0f);

        return 100.0f - HitChance;
    }();

    int32 tmp = int32(missChance * 100.0f);

    int32 rand = irand(0, 9999);
    if (tmp > 0 && rand < tmp)
        return SPELL_MISS_MISS;

    // Chance resist mechanic (select max value from every mechanic spell effect)
    int32 resist_chance = victim->GetMechanicResistChance(spellInfo) * 100;

    // Roll chance
    if (resist_chance > 0 && rand < (tmp += resist_chance))
        return SPELL_MISS_RESIST;

    // cast by caster in front of victim
    if (!victim->HasUnitState(UNIT_STATE_CONTROLLED) && (victim->HasInArc(float(M_PI), this) || victim->HasAuraType(SPELL_AURA_IGNORE_HIT_DIRECTION)))
    {
        int32 deflect_chance = victim->GetTotalAuraModifier(SPELL_AURA_DEFLECT_SPELLS) * 100;
        if (deflect_chance > 0 && rand < (tmp += deflect_chance))
            return SPELL_MISS_DEFLECT;
    }

    return SPELL_MISS_NONE;
}

// Calculate spell hit result can be:
// Every spell can: Evade/Immune/Reflect/Sucesful hit
// For melee based spells:
//   Miss
//   Dodge
//   Parry
// For spells
//   Resist
SpellMissInfo WorldObject::SpellHitResult(Unit* victim, SpellInfo const* spellInfo, bool canReflect /*= false*/) const
{
    // Check for immune
    if (victim->IsImmunedToSpell(spellInfo, this))
        return SPELL_MISS_IMMUNE;

    // Damage immunity is only checked if the spell has damage effects, this immunity must not prevent aura apply
    // returns SPELL_MISS_IMMUNE in that case, for other spells, the SMSG_SPELL_GO must show hit
    if (spellInfo->HasOnlyDamageEffects() && victim->IsImmunedToDamage(spellInfo))
        return SPELL_MISS_IMMUNE;

    // All positive spells can`t miss
    /// @todo client not show miss log for this spells - so need find info for this in dbc and use it!
    if (spellInfo->IsPositive() && !IsHostileTo(victim)) // prevent from affecting enemy by "positive" spell
        return SPELL_MISS_NONE;

    if (this == victim)
        return SPELL_MISS_NONE;

    // Return evade for units in evade mode
    if (victim->GetTypeId() == TYPEID_UNIT && victim->ToCreature()->IsEvadingAttacks())
        return SPELL_MISS_EVADE;

    // Try victim reflect spell
    if (canReflect)
    {
        int32 reflectchance = victim->GetTotalAuraModifier(SPELL_AURA_REFLECT_SPELLS);
        reflectchance += victim->GetTotalAuraModifierByMiscMask(SPELL_AURA_REFLECT_SPELLS_SCHOOL, spellInfo->GetSchoolMask());

        if (reflectchance > 0 && roll_chance_i(reflectchance))
            return SPELL_MISS_REFLECT;
    }

    if (spellInfo->HasAttribute(SPELL_ATTR3_IGNORE_HIT_RESULT))
        return SPELL_MISS_NONE;

    switch (spellInfo->DmgClass)
    {
        case SPELL_DAMAGE_CLASS_RANGED:
        case SPELL_DAMAGE_CLASS_MELEE:
            return MeleeSpellHitResult(victim, spellInfo);
        case SPELL_DAMAGE_CLASS_NONE:
            return SPELL_MISS_NONE;
        case SPELL_DAMAGE_CLASS_MAGIC:
            return MagicSpellHitResult(victim, spellInfo);
    }
    return SPELL_MISS_NONE;
}

void WorldObject::SendSpellMiss(Unit* target, uint32 spellID, SpellMissInfo missInfo)
{
    WorldPackets::CombatLog::SpellMissLog spellMissLog;
    spellMissLog.SpellID = spellID;
    spellMissLog.Caster = GetGUID();
    spellMissLog.Entries.emplace_back(target->GetGUID(), missInfo);
    SendMessageToSet(spellMissLog.Write(), true);
}

FactionTemplateEntry const* WorldObject::GetFactionTemplateEntry() const
{
    uint32 factionId = GetFaction();
    FactionTemplateEntry const* entry = sFactionTemplateStore.LookupEntry(factionId);
    if (!entry)
    {
        switch (GetTypeId())
        {
            case TYPEID_PLAYER:
                TC_LOG_ERROR("entities.unit", "Player %s has invalid faction (faction template id) #%u", ToPlayer()->GetName().c_str(), factionId);
                break;
            case TYPEID_UNIT:
                TC_LOG_ERROR("entities.unit", "Creature (template id: %u) has invalid faction (faction template Id) #%u", ToCreature()->GetCreatureTemplate()->Entry, factionId);
                break;
            case TYPEID_GAMEOBJECT:
                if (factionId) // Gameobjects may have faction template id = 0
                    TC_LOG_ERROR("entities.faction", "GameObject (template id: %u) has invalid faction (faction template Id) #%u", ToGameObject()->GetGOInfo()->entry, factionId);
                break;
            default:
                TC_LOG_ERROR("entities.unit", "Object (name=%s, type=%u) has invalid faction (faction template Id) #%u", GetName().c_str(), uint32(GetTypeId()), factionId);
                break;
        }
    }

    return entry;
}

// function based on function Unit::UnitReaction from 13850 client
ReputationRank WorldObject::GetReactionTo(WorldObject const* target) const
{
    // always friendly to self
    if (this == target)
        return REP_FRIENDLY;

    // always friendly to charmer or owner
    if (GetCharmerOrOwnerOrSelf() == target->GetCharmerOrOwnerOrSelf())
        return REP_FRIENDLY;

    Player const* selfPlayerOwner = GetAffectingPlayer();
    Player const* targetPlayerOwner = target->GetAffectingPlayer();

    // check forced reputation to support SPELL_AURA_FORCE_REACTION
    if (selfPlayerOwner)
    {
        if (FactionTemplateEntry const* targetFactionTemplateEntry = target->GetFactionTemplateEntry())
            if (ReputationRank const* repRank = selfPlayerOwner->GetReputationMgr().GetForcedRankIfAny(targetFactionTemplateEntry))
                return *repRank;
    }
    else if (targetPlayerOwner)
    {
        if (FactionTemplateEntry const* selfFactionTemplateEntry = GetFactionTemplateEntry())
            if (ReputationRank const* repRank = targetPlayerOwner->GetReputationMgr().GetForcedRankIfAny(selfFactionTemplateEntry))
                return *repRank;
    }

    Unit const* unit = Coalesce<const Unit>(ToUnit(), selfPlayerOwner);
    Unit const* targetUnit = Coalesce<const Unit>(target->ToUnit(), targetPlayerOwner);
    if (unit && unit->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
    {
        if (targetUnit && targetUnit->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
        {
            if (selfPlayerOwner && targetPlayerOwner)
            {
                // always friendly to other unit controlled by player, or to the player himself
                if (selfPlayerOwner == targetPlayerOwner)
                    return REP_FRIENDLY;

                // duel - always hostile to opponent
                if (selfPlayerOwner->duel && selfPlayerOwner->duel->Opponent == targetPlayerOwner && selfPlayerOwner->duel->State == DUEL_STATE_IN_PROGRESS)
                    return REP_HOSTILE;

                // same group - checks dependant only on our faction - skip FFA_PVP for example
                if (selfPlayerOwner->IsInRaidWith(targetPlayerOwner))
                    return REP_FRIENDLY; // return true to allow config option AllowTwoSide.Interaction.Group to work
                                         // however client seems to allow mixed group parties, because in 13850 client it works like:
                                         // return GetFactionReactionTo(GetFactionTemplateEntry(), target);
            }

            // check FFA_PVP
            if (unit->IsFFAPvP() && targetUnit->IsFFAPvP())
                return REP_HOSTILE;

            if (selfPlayerOwner)
            {
                if (FactionTemplateEntry const* targetFactionTemplateEntry = targetUnit->GetFactionTemplateEntry())
                {
                    if (ReputationRank const* repRank = selfPlayerOwner->GetReputationMgr().GetForcedRankIfAny(targetFactionTemplateEntry))
                        return *repRank;
                    if (!selfPlayerOwner->HasUnitFlag2(UNIT_FLAG2_IGNORE_REPUTATION))
                    {
                        if (FactionEntry const* targetFactionEntry = sFactionStore.LookupEntry(targetFactionTemplateEntry->Faction))
                        {
                            if (targetFactionEntry->CanHaveReputation())
                            {
                                // check contested flags
                                if ((targetFactionTemplateEntry->Flags & FACTION_TEMPLATE_FLAG_CONTESTED_GUARD) &&
                                    selfPlayerOwner->HasPlayerFlag(PLAYER_FLAGS_CONTESTED_PVP))
                                    return REP_HOSTILE;

                                // if faction has reputation, hostile state depends only from AtWar state
                                if (selfPlayerOwner->GetReputationMgr().IsAtWar(targetFactionEntry))
                                    return REP_HOSTILE;
                                return REP_FRIENDLY;
                            }
                        }
                    }
                }
            }
        }
    }

    // do checks dependant only on our faction
    return WorldObject::GetFactionReactionTo(GetFactionTemplateEntry(), target);
}

/*static*/ ReputationRank WorldObject::GetFactionReactionTo(FactionTemplateEntry const* factionTemplateEntry, WorldObject const* target)
{
    // always neutral when no template entry found
    if (!factionTemplateEntry)
        return REP_NEUTRAL;

    FactionTemplateEntry const* targetFactionTemplateEntry = target->GetFactionTemplateEntry();
    if (!targetFactionTemplateEntry)
        return REP_NEUTRAL;

    if (Player const* targetPlayerOwner = target->GetAffectingPlayer())
    {
        // check contested flags
        if ((factionTemplateEntry->Flags & FACTION_TEMPLATE_FLAG_CONTESTED_GUARD) &&
            targetPlayerOwner->HasPlayerFlag(PLAYER_FLAGS_CONTESTED_PVP))
            return REP_HOSTILE;
        if (ReputationRank const* repRank = targetPlayerOwner->GetReputationMgr().GetForcedRankIfAny(factionTemplateEntry))
            return *repRank;
        if (target->IsUnit() && !target->ToUnit()->HasUnitFlag2(UNIT_FLAG2_IGNORE_REPUTATION))
        {
            if (FactionEntry const* factionEntry = sFactionStore.LookupEntry(factionTemplateEntry->Faction))
            {
                if (factionEntry->CanHaveReputation())
                {
                    // CvP case - check reputation, don't allow state higher than neutral when at war
                    ReputationRank repRank = targetPlayerOwner->GetReputationMgr().GetRank(factionEntry);
                    if (targetPlayerOwner->GetReputationMgr().IsAtWar(factionEntry))
                        repRank = std::min(REP_NEUTRAL, repRank);
                    return repRank;
                }
            }
        }
    }

    // common faction based check
    if (factionTemplateEntry->IsHostileTo(targetFactionTemplateEntry))
        return REP_HOSTILE;
    if (factionTemplateEntry->IsFriendlyTo(targetFactionTemplateEntry))
        return REP_FRIENDLY;
    if (targetFactionTemplateEntry->IsFriendlyTo(factionTemplateEntry))
        return REP_FRIENDLY;
    if (factionTemplateEntry->Flags & FACTION_TEMPLATE_FLAG_HOSTILE_BY_DEFAULT)
        return REP_HOSTILE;
    // neutral by default
    return REP_NEUTRAL;
}

bool WorldObject::IsHostileTo(WorldObject const* target) const
{
    return GetReactionTo(target) <= REP_HOSTILE;
}

bool WorldObject::IsFriendlyTo(WorldObject const* target) const
{
    return GetReactionTo(target) >= REP_FRIENDLY;
}

bool WorldObject::IsHostileToPlayers() const
{
    FactionTemplateEntry const* my_faction = GetFactionTemplateEntry();
    if (!my_faction->Faction)
        return false;

    FactionEntry const* raw_faction = sFactionStore.LookupEntry(my_faction->Faction);
    if (raw_faction && raw_faction->ReputationIndex >= 0)
        return false;

    return my_faction->IsHostileToPlayers();
}

bool WorldObject::IsNeutralToAll() const
{
    FactionTemplateEntry const* my_faction = GetFactionTemplateEntry();
    if (!my_faction->Faction)
        return true;

    FactionEntry const* raw_faction = sFactionStore.LookupEntry(my_faction->Faction);
    if (raw_faction && raw_faction->ReputationIndex >= 0)
        return false;

    return my_faction->IsNeutralToAll();
}

SpellCastResult WorldObject::CastSpell(CastSpellTargetArg const& targets, uint32 spellId, CastSpellExtraArgs const& args /*= { }*/)
{
    SpellInfo const* info = sSpellMgr->GetSpellInfo(spellId, args.CastDifficulty != DIFFICULTY_NONE ? args.CastDifficulty : GetMap()->GetDifficultyID());
    if (!info)
    {
        TC_LOG_ERROR("entities.unit", "CastSpell: unknown spell %u by caster %s", spellId, GetGUID().ToString().c_str());
        return SPELL_FAILED_SPELL_UNAVAILABLE;
    }

    if (!targets.Targets)
    {
        TC_LOG_ERROR("entities.unit", "CastSpell: Invalid target passed to spell cast %u by %s", spellId, GetGUID().ToString().c_str());
        return SPELL_FAILED_BAD_TARGETS;
    }

    Spell* spell = new Spell(this, info, args.TriggerFlags, args.OriginalCaster, args.OriginalCastId);
    for (auto const& pair : args.SpellValueOverrides)
        spell->SetSpellValue(pair.first, pair.second);

    spell->m_CastItem = args.CastItem;
    if (args.OriginalCastItemLevel)
        spell->m_castItemLevel = *args.OriginalCastItemLevel;

    return spell->prepare(*targets.Targets, args.TriggeringAura);
}

void WorldObject::SendPlaySpellVisual(WorldObject* target, uint32 spellVisualId, uint16 missReason, uint16 reflectStatus, float travelSpeed, bool speedAsTime /*= false*/)
{
    WorldPackets::Spells::PlaySpellVisual playSpellVisual;
    playSpellVisual.Source = GetGUID();
    playSpellVisual.Target = target->GetGUID();
    playSpellVisual.TargetPosition = target->GetPosition();
    playSpellVisual.SpellVisualID = spellVisualId;
    playSpellVisual.TravelSpeed = travelSpeed;
    playSpellVisual.MissReason = missReason;
    playSpellVisual.ReflectStatus = reflectStatus;
    playSpellVisual.SpeedAsTime = speedAsTime;
    SendMessageToSet(playSpellVisual.Write(), true);
}

void WorldObject::SendPlaySpellVisual(Position const& targetPosition, float launchDelay, uint32 spellVisualId, uint16 missReason, uint16 reflectStatus, float travelSpeed, bool speedAsTime /*= false*/)
{
    WorldPackets::Spells::PlaySpellVisual playSpellVisual;
    playSpellVisual.Source = GetGUID();
    playSpellVisual.TargetPosition = targetPosition;
    playSpellVisual.LaunchDelay = launchDelay;
    playSpellVisual.SpellVisualID = spellVisualId;
    playSpellVisual.TravelSpeed = travelSpeed;
    playSpellVisual.MissReason = missReason;
    playSpellVisual.ReflectStatus = reflectStatus;
    playSpellVisual.SpeedAsTime = speedAsTime;
    SendMessageToSet(playSpellVisual.Write(), true);
}

void WorldObject::SendCancelSpellVisual(uint32 id)
{
    WorldPackets::Spells::CancelSpellVisual cancelSpellVisual;
    cancelSpellVisual.Source = GetGUID();
    cancelSpellVisual.SpellVisualID = id;
    SendMessageToSet(cancelSpellVisual.Write(), true);
}

void WorldObject::SendPlayOrphanSpellVisual(ObjectGuid const& target, uint32 spellVisualId, float travelSpeed, bool speedAsTime /*= false*/, bool withSourceOrientation /*= false*/)
{
    WorldPackets::Spells::PlayOrphanSpellVisual playOrphanSpellVisual;
    playOrphanSpellVisual.SourceLocation = GetPosition();
    if (withSourceOrientation)
    {
        if (IsGameObject())
        {
            QuaternionData rotation = ToGameObject()->GetWorldRotation();
            rotation.toEulerAnglesZYX(playOrphanSpellVisual.SourceRotation.Pos.m_positionZ,
                playOrphanSpellVisual.SourceRotation.Pos.m_positionY,
                playOrphanSpellVisual.SourceRotation.Pos.m_positionX);
        }
        else
            playOrphanSpellVisual.SourceRotation = Position(0.0f, 0.0f, GetOrientation());
    }

    playOrphanSpellVisual.Target = target; // exclusive with TargetLocation
    playOrphanSpellVisual.SpellVisualID = spellVisualId;
    playOrphanSpellVisual.TravelSpeed = travelSpeed;
    playOrphanSpellVisual.SpeedAsTime = speedAsTime;
    playOrphanSpellVisual.LaunchDelay = 0.0f;
    SendMessageToSet(playOrphanSpellVisual.Write(), true);
}

void WorldObject::SendPlayOrphanSpellVisual(Position const& targetLocation, uint32 spellVisualId, float travelSpeed, bool speedAsTime /*= false*/, bool withSourceOrientation /*= false*/)
{
    WorldPackets::Spells::PlayOrphanSpellVisual playOrphanSpellVisual;
    playOrphanSpellVisual.SourceLocation = GetPosition();
    if (withSourceOrientation)
    {
        if (IsGameObject())
        {
            QuaternionData rotation = ToGameObject()->GetWorldRotation();
            rotation.toEulerAnglesZYX(playOrphanSpellVisual.SourceRotation.Pos.m_positionZ,
                playOrphanSpellVisual.SourceRotation.Pos.m_positionY,
                playOrphanSpellVisual.SourceRotation.Pos.m_positionX);
        }
        else
            playOrphanSpellVisual.SourceRotation = Position(0.0f, 0.0f, GetOrientation());
    }

    playOrphanSpellVisual.TargetLocation = targetLocation; // exclusive with Target
    playOrphanSpellVisual.SpellVisualID = spellVisualId;
    playOrphanSpellVisual.TravelSpeed = travelSpeed;
    playOrphanSpellVisual.SpeedAsTime = speedAsTime;
    playOrphanSpellVisual.LaunchDelay = 0.0f;
    SendMessageToSet(playOrphanSpellVisual.Write(), true);
}

void WorldObject::SendCancelOrphanSpellVisual(uint32 id)
{
    WorldPackets::Spells::CancelOrphanSpellVisual cancelOrphanSpellVisual;
    cancelOrphanSpellVisual.SpellVisualID = id;
    SendMessageToSet(cancelOrphanSpellVisual.Write(), true);
}

void WorldObject::SendPlaySpellVisualKit(uint32 id, uint32 type, uint32 duration) const
{
    WorldPackets::Spells::PlaySpellVisualKit playSpellVisualKit;
    playSpellVisualKit.Unit = GetGUID();
    playSpellVisualKit.KitRecID = id;
    playSpellVisualKit.KitType = type;
    playSpellVisualKit.Duration = duration;
    SendMessageToSet(playSpellVisualKit.Write(), true);
}

void WorldObject::SendCancelSpellVisualKit(uint32 id)
{
    WorldPackets::Spells::CancelSpellVisualKit cancelSpellVisualKit;
    cancelSpellVisualKit.Source = GetGUID();
    cancelSpellVisualKit.SpellVisualKitID = id;
    SendMessageToSet(cancelSpellVisualKit.Write(), true);
}

// function based on function Unit::CanAttack from 13850 client
bool WorldObject::IsValidAttackTarget(WorldObject const* target, SpellInfo const* bySpell /*= nullptr*/) const
{
    ASSERT(target);

    // some positive spells can be casted at hostile target
    bool isPositiveSpell = bySpell && bySpell->IsPositive();

    // can't attack self (spells can, attribute check)
    if (!bySpell && this == target)
        return false;

    // can't attack unattackable units
    Unit const* unitTarget = target->ToUnit();
    if (unitTarget && unitTarget->HasUnitState(UNIT_STATE_UNATTACKABLE))
        return false;

    // can't attack GMs
    if (target->GetTypeId() == TYPEID_PLAYER && target->ToPlayer()->IsGameMaster())
        return false;

    Unit const* unit = ToUnit();
    // visibility checks (only units)
    if (unit)
    {
        // can't attack invisible
        if (!bySpell || !bySpell->HasAttribute(SPELL_ATTR6_CAN_TARGET_INVISIBLE))
        {
            if (!unit->CanSeeOrDetect(target, bySpell && bySpell->IsAffectingArea()))
                return false;
        }
    }

    // can't attack dead
    if ((!bySpell || !bySpell->IsAllowingDeadTarget()) && unitTarget && !unitTarget->IsAlive())
        return false;

    // can't attack untargetable
    if ((!bySpell || !bySpell->HasAttribute(SPELL_ATTR6_CAN_TARGET_UNTARGETABLE)) && unitTarget && unitTarget->HasUnitFlag(UNIT_FLAG_UNINTERACTIBLE))
        return false;

    if (Player const* playerAttacker = ToPlayer())
    {
        if (playerAttacker->HasPlayerFlag(PLAYER_FLAGS_UBER))
            return false;
    }

    // check flags
    if (unitTarget && unitTarget->HasUnitFlag(UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_ON_TAXI | UNIT_FLAG_NOT_ATTACKABLE_1 | UNIT_FLAG_NON_ATTACKABLE_2))
        return false;

    Unit const* unitOrOwner = unit;
    GameObject const* go = ToGameObject();
    if (go && go->GetGoType() == GAMEOBJECT_TYPE_TRAP)
        unitOrOwner = go->GetOwner();

    // ignore immunity flags when assisting
    if (unitOrOwner && unitTarget && !(isPositiveSpell && bySpell->HasAttribute(SPELL_ATTR6_ASSIST_IGNORE_IMMUNE_FLAG)))
    {
        if (!unitOrOwner->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) && unitTarget->IsImmuneToNPC())
            return false;

        if (!unitTarget->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) && unitOrOwner->IsImmuneToNPC())
            return false;

        if (!bySpell || !bySpell->HasAttribute(SPELL_ATTR8_ATTACK_IGNORE_IMMUNE_TO_PC_FLAG))
        {
            if (unitOrOwner->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) && unitTarget->IsImmuneToPC())
                return false;

            if (unitTarget->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) && unitOrOwner->IsImmuneToPC())
                return false;
        }
    }

    // CvC case - can attack each other only when one of them is hostile
    if (unit && !unit->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) && unitTarget && !unitTarget->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
        return IsHostileTo(unitTarget) || unitTarget->IsHostileTo(this);

    // Traps without owner or with NPC owner versus Creature case - can attack to creature only when one of them is hostile
    if (go && go->GetGoType() == GAMEOBJECT_TYPE_TRAP)
    {
        Unit const* goOwner = go->GetOwner();
        if (!goOwner || !goOwner->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
            if (unitTarget && !unitTarget->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
                return IsHostileTo(unitTarget) || unitTarget->IsHostileTo(this);
    }

    // PvP, PvC, CvP case
    // can't attack friendly targets
    if (IsFriendlyTo(target) || target->IsFriendlyTo(this))
        return false;

    Player const* playerAffectingAttacker = unit && unit->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) ? GetAffectingPlayer() : go ? GetAffectingPlayer() : nullptr;
    Player const* playerAffectingTarget = unitTarget && unitTarget->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) ? unitTarget->GetAffectingPlayer() : nullptr;

    // Not all neutral creatures can be attacked (even some unfriendly faction does not react aggresive to you, like Sporaggar)
    if ((playerAffectingAttacker && !playerAffectingTarget) || (!playerAffectingAttacker && playerAffectingTarget))
    {
        Player const* player = playerAffectingAttacker ? playerAffectingAttacker : playerAffectingTarget;

        if (Unit const* creature = playerAffectingAttacker ? unitTarget : unit)
        {
            if (creature->IsContestedGuard() && player->HasPlayerFlag(PLAYER_FLAGS_CONTESTED_PVP))
                return true;

            if (FactionTemplateEntry const* factionTemplate = creature->GetFactionTemplateEntry())
            {
                if (!(player->GetReputationMgr().GetForcedRankIfAny(factionTemplate)))
                    if (FactionEntry const* factionEntry = sFactionStore.LookupEntry(factionTemplate->Faction))
                        if (FactionState const* repState = player->GetReputationMgr().GetState(factionEntry))
                            if (!repState->Flags.HasFlag(ReputationFlags::AtWar))
                                return false;

            }
        }
    }

    Creature const* creatureAttacker = ToCreature();
    if (creatureAttacker && (creatureAttacker->GetCreatureTemplate()->type_flags & CREATURE_TYPE_FLAG_TREAT_AS_RAID_UNIT))
        return false;

    if (playerAffectingAttacker && playerAffectingTarget)
        if (playerAffectingAttacker->duel && playerAffectingAttacker->duel->Opponent == playerAffectingTarget && playerAffectingAttacker->duel->State == DUEL_STATE_IN_PROGRESS)
            return true;

    // PvP case - can't attack when attacker or target are in sanctuary
    // however, 13850 client doesn't allow to attack when one of the unit's has sanctuary flag and is pvp
    if (unitTarget && unitTarget->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) && unitOrOwner && unitOrOwner->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED) && (unitTarget->IsInSanctuary() || unitOrOwner->IsInSanctuary()))
        return false;

    // additional checks - only PvP case
    if (playerAffectingAttacker && playerAffectingTarget)
    {
        if (playerAffectingTarget->IsPvP())
            return true;

        if (playerAffectingAttacker->IsFFAPvP() && playerAffectingTarget->IsFFAPvP())
            return true;

        return playerAffectingAttacker->HasPvpFlag(UNIT_BYTE2_FLAG_UNK1) ||
            playerAffectingTarget->HasPvpFlag(UNIT_BYTE2_FLAG_UNK1);
    }

    return true;
}

// function based on function Unit::CanAssist from 13850 client
bool WorldObject::IsValidAssistTarget(WorldObject const* target, SpellInfo const* bySpell /*= nullptr*/) const
{
    ASSERT(target);

    // some negative spells can be casted at friendly target
    bool isNegativeSpell = bySpell && !bySpell->IsPositive();

    // can assist to self
    if (this == target)
        return true;

    // can't assist unattackable units
    Unit const* unitTarget = target->ToUnit();
    if (unitTarget && unitTarget->HasUnitState(UNIT_STATE_UNATTACKABLE))
        return false;

    // can't assist GMs
    if (target->GetTypeId() == TYPEID_PLAYER && target->ToPlayer()->IsGameMaster())
        return false;

    // can't assist own vehicle or passenger
    Unit const* unit = ToUnit();
    if (unit && unitTarget && unit->GetVehicle())
    {
        if (unit->IsOnVehicle(unitTarget))
            return false;

        if (unit->GetVehicleBase()->IsOnVehicle(unitTarget))
            return false;
    }

    // can't assist invisible
    if ((!bySpell || !bySpell->HasAttribute(SPELL_ATTR6_CAN_TARGET_INVISIBLE)) && !CanSeeOrDetect(target, bySpell && bySpell->IsAffectingArea()))
        return false;

    // can't assist dead
    if ((!bySpell || !bySpell->IsAllowingDeadTarget()) && unitTarget && !unitTarget->IsAlive())
        return false;

    // can't assist untargetable
    if ((!bySpell || !bySpell->HasAttribute(SPELL_ATTR6_CAN_TARGET_UNTARGETABLE)) && unitTarget && unitTarget->HasUnitFlag(UNIT_FLAG_UNINTERACTIBLE))
        return false;

    // check flags for negative spells
    if (isNegativeSpell && unitTarget && unitTarget->HasUnitFlag(UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_ON_TAXI | UNIT_FLAG_NOT_ATTACKABLE_1 | UNIT_FLAG_NON_ATTACKABLE_2))
        return false;

    if (isNegativeSpell || !bySpell || !bySpell->HasAttribute(SPELL_ATTR6_ASSIST_IGNORE_IMMUNE_FLAG))
    {
        if (unit && unit->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
        {
            if (!bySpell || !bySpell->HasAttribute(SPELL_ATTR8_ATTACK_IGNORE_IMMUNE_TO_PC_FLAG))
                if (unitTarget && unitTarget->IsImmuneToPC())
                    return false;
        }
        else
        {
            if (unitTarget && unitTarget->IsImmuneToNPC())
                return false;
        }
    }

    // can't assist non-friendly targets
    if (GetReactionTo(target) < REP_NEUTRAL && target->GetReactionTo(this) < REP_NEUTRAL && (!ToCreature() || !(ToCreature()->GetCreatureTemplate()->type_flags & CREATURE_TYPE_FLAG_TREAT_AS_RAID_UNIT)))
        return false;

    // PvP case
    if (unitTarget && unitTarget->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
    {
        if (unit && unit->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
        {
            Player const* selfPlayerOwner = GetAffectingPlayer();
            Player const* targetPlayerOwner = unitTarget->GetAffectingPlayer();
            if (selfPlayerOwner && targetPlayerOwner)
            {
                // can't assist player which is dueling someone
                if (selfPlayerOwner != targetPlayerOwner && targetPlayerOwner->duel)
                    return false;
            }
            // can't assist player in ffa_pvp zone from outside
            if (unitTarget->IsFFAPvP() && !unit->IsFFAPvP())
                return false;

            // can't assist player out of sanctuary from sanctuary if has pvp enabled
            if (unitTarget->IsPvP())
                if (unit->IsInSanctuary() && !unitTarget->IsInSanctuary())
                    return false;
        }
    }
    // PvC case - player can assist creature only if has specific type flags
    // !target->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PVP_ATTACKABLE) &&
    else if (unit && unit->HasUnitFlag(UNIT_FLAG_PLAYER_CONTROLLED))
    {
        if (!bySpell || !bySpell->HasAttribute(SPELL_ATTR6_ASSIST_IGNORE_IMMUNE_FLAG))
            if (unitTarget && !unitTarget->IsPvP())
                if (Creature const* creatureTarget = target->ToCreature())
                    return ((creatureTarget->GetCreatureTemplate()->type_flags & CREATURE_TYPE_FLAG_TREAT_AS_RAID_UNIT) || (creatureTarget->GetCreatureTemplate()->type_flags & CREATURE_TYPE_FLAG_CAN_ASSIST));
    }

    return true;
}

Unit* WorldObject::GetMagicHitRedirectTarget(Unit* victim, SpellInfo const* spellInfo)
{
    // Patch 1.2 notes: Spell Reflection no longer reflects abilities
    if (spellInfo->HasAttribute(SPELL_ATTR0_ABILITY) || spellInfo->HasAttribute(SPELL_ATTR1_CANT_BE_REDIRECTED) || spellInfo->HasAttribute(SPELL_ATTR0_UNAFFECTED_BY_INVULNERABILITY))
        return victim;

    Unit::AuraEffectList const& magnetAuras = victim->GetAuraEffectsByType(SPELL_AURA_SPELL_MAGNET);
    for (AuraEffect const* aurEff : magnetAuras)
    {
        if (Unit* magnet = aurEff->GetBase()->GetCaster())
        {
            if (spellInfo->CheckExplicitTarget(this, magnet) == SPELL_CAST_OK && IsValidAttackTarget(magnet, spellInfo))
            {
                /// @todo handle this charge drop by proc in cast phase on explicit target
                if (spellInfo->HasHitDelay())
                {
                    // Set up missile speed based delay
                    float hitDelay = spellInfo->LaunchDelay;
                    if (spellInfo->HasAttribute(SPELL_ATTR9_SPECIAL_DELAY_CALCULATION))
                        hitDelay += spellInfo->Speed;
                    else if (spellInfo->Speed > 0.0f)
                        hitDelay += std::max(victim->GetDistance(this), 5.0f) / spellInfo->Speed;

                    uint32 delay = uint32(std::floor(hitDelay * 1000.0f));
                    // Schedule charge drop
                    aurEff->GetBase()->DropChargeDelayed(delay, AURA_REMOVE_BY_EXPIRE);
                }
                else
                    aurEff->GetBase()->DropCharge(AURA_REMOVE_BY_EXPIRE);

                return magnet;
            }
        }
    }
    return victim;
}

uint32 WorldObject::GetCastSpellXSpellVisualId(SpellInfo const* spellInfo) const
{
    return spellInfo->GetSpellXSpellVisualId(this);
}

template <typename Container>
void WorldObject::GetGameObjectListWithEntryInGrid(Container& gameObjectContainer, uint32 entry, float maxSearchRange /*= 250.0f*/) const
{
    Trinity::AllGameObjectsWithEntryInRange check(this, entry, maxSearchRange);
    Trinity::GameObjectListSearcher<Trinity::AllGameObjectsWithEntryInRange> searcher(this, gameObjectContainer, check);
    Cell::VisitGridObjects(this, searcher, maxSearchRange);
}

template <typename Container>
void WorldObject::GetCreatureListWithEntryInGrid(Container& creatureContainer, uint32 entry, float maxSearchRange /*= 250.0f*/) const
{
    Trinity::AllCreaturesOfEntryInRange check(this, entry, maxSearchRange);
    Trinity::CreatureListSearcher<Trinity::AllCreaturesOfEntryInRange> searcher(this, creatureContainer, check);
    Cell::VisitGridObjects(this, searcher, maxSearchRange);
}

template <typename Container>
void WorldObject::GetPlayerListInGrid(Container& playerContainer, float maxSearchRange, bool alive /*= true*/) const
{
    Trinity::AnyPlayerInObjectRangeCheck checker(this, maxSearchRange, alive);
    Trinity::PlayerListSearcher<Trinity::AnyPlayerInObjectRangeCheck> searcher(this, playerContainer, checker);
    Cell::VisitWorldObjects(this, searcher, maxSearchRange);
}

void WorldObject::GetNearPoint2D(WorldObject const* searcher, float& x, float& y, float distance2d, float absAngle) const
{
    float effectiveReach = GetCombatReach();

    if (searcher)
    {
        effectiveReach += searcher->GetCombatReach();

        if (this != searcher)
        {
            float myHover = 0.0f, searcherHover = 0.0f;
            if (Unit const* unit = ToUnit())
                myHover = unit->GetHoverOffset();
            if (Unit const* searchUnit = searcher->ToUnit())
                searcherHover = searchUnit->GetHoverOffset();

            float hoverDelta = myHover - searcherHover;
            if (hoverDelta != 0.0f)
                effectiveReach = std::sqrt(std::max(effectiveReach * effectiveReach - hoverDelta * hoverDelta, 0.0f));
        }
    }

    x = GetPositionX() + (effectiveReach + distance2d) * std::cos(absAngle);
    y = GetPositionY() + (effectiveReach + distance2d) * std::sin(absAngle);

    Trinity::NormalizeMapCoord(x);
    Trinity::NormalizeMapCoord(y);
}

void WorldObject::GetNearPoint(WorldObject const* searcher, float& x, float& y, float& z, float distance2d, float absAngle) const
{
    GetNearPoint2D(searcher, x, y, distance2d, absAngle);
    z = GetPositionZ();
    (searcher ? searcher : this)->UpdateAllowedPositionZ(x, y, z);

    // if detection disabled, return first point
    if (!sWorld->getBoolConfig(CONFIG_DETECT_POS_COLLISION))
        return;

    // return if the point is already in LoS
    if (IsWithinLOS(x, y, z))
        return;

    // remember first point
    float first_x = x;
    float first_y = y;
    float first_z = z;

    // loop in a circle to look for a point in LoS using small steps
    for (float angle = float(M_PI) / 8; angle < float(M_PI) * 2; angle += float(M_PI) / 8)
    {
        GetNearPoint2D(searcher, x, y, distance2d, absAngle + angle);
        z = GetPositionZ();
        (searcher ? searcher : this)->UpdateAllowedPositionZ(x, y, z);
        if (IsWithinLOS(x, y, z))
            return;
    }

    // still not in LoS, give up and return first position found
    x = first_x;
    y = first_y;
    z = first_z;
}

void WorldObject::GetClosePoint(float& x, float& y, float& z, float size, float distance2d /*= 0*/, float relAngle /*= 0*/) const
{
    // angle calculated from current orientation
    GetNearPoint(nullptr, x, y, z, distance2d + size, GetOrientation() + relAngle);
}

Position WorldObject::GetNearPosition(float dist, float angle)
{
    Position pos = GetPosition();
    MovePosition(pos, dist, angle);
    return pos;
}

Position WorldObject::GetFirstCollisionPosition(float dist, float angle)
{
    Position pos = GetPosition();
    MovePositionToFirstCollision(pos, dist, angle);
    return pos;
}

Position WorldObject::GetRandomNearPosition(float radius)
{
    Position pos = GetPosition();
    MovePosition(pos, radius * (float)rand_norm(), (float)rand_norm() * static_cast<float>(2 * M_PI));
    return pos;
}

void WorldObject::GetContactPoint(WorldObject const* obj, float& x, float& y, float& z, float distance2d /*= CONTACT_DISTANCE*/) const
{
    // angle to face `obj` to `this` using distance includes size of `obj`
    GetNearPoint(obj, x, y, z, distance2d, GetAbsoluteAngle(obj));
}

void WorldObject::MovePosition(Position &pos, float dist, float angle)
{
    angle += GetOrientation();
    float destx, desty, destz, ground, floor;
    destx = pos.m_positionX + dist * std::cos(angle);
    desty = pos.m_positionY + dist * std::sin(angle);

    // Prevent invalid coordinates here, position is unchanged
    if (!Trinity::IsValidMapCoord(destx, desty, pos.m_positionZ))
    {
        TC_LOG_FATAL("misc", "WorldObject::MovePosition: Object %s has invalid coordinates X: %f and Y: %f were passed!",
            GetGUID().ToString().c_str(), destx, desty);
        return;
    }

    ground = GetMapHeight(destx, desty, MAX_HEIGHT);
    floor = GetMapHeight(destx, desty, pos.m_positionZ);
    destz = std::fabs(ground - pos.m_positionZ) <= std::fabs(floor - pos.m_positionZ) ? ground : floor;

    float step = dist/10.0f;

    for (uint8 j = 0; j < 10; ++j)
    {
        // do not allow too big z changes
        if (std::fabs(pos.m_positionZ - destz) > 6)
        {
            destx -= step * std::cos(angle);
            desty -= step * std::sin(angle);
            ground = GetMap()->GetHeight(GetPhaseShift(), destx, desty, MAX_HEIGHT, true);
            floor = GetMap()->GetHeight(GetPhaseShift(), destx, desty, pos.m_positionZ, true);
            destz = std::fabs(ground - pos.m_positionZ) <= std::fabs(floor - pos.m_positionZ) ? ground : floor;
        }
        // we have correct destz now
        else
        {
            pos.Relocate(destx, desty, destz);
            break;
        }
    }

    Trinity::NormalizeMapCoord(pos.m_positionX);
    Trinity::NormalizeMapCoord(pos.m_positionY);
    UpdateGroundPositionZ(pos.m_positionX, pos.m_positionY, pos.m_positionZ);
    pos.SetOrientation(GetOrientation());
}

void WorldObject::MovePositionToFirstCollision(Position &pos, float dist, float angle)
{
    angle += GetOrientation();
    float destx, desty, destz;
    destx = pos.m_positionX + dist * std::cos(angle);
    desty = pos.m_positionY + dist * std::sin(angle);
    destz = pos.m_positionZ;

    // Prevent invalid coordinates here, position is unchanged
    if (!Trinity::IsValidMapCoord(destx, desty))
    {
        TC_LOG_FATAL("misc", "WorldObject::MovePositionToFirstCollision invalid coordinates X: %f and Y: %f were passed!", destx, desty);
        return;
    }

    // Use a detour raycast to get our first collision point
    PathGenerator path(this);
    path.SetUseRaycast(true);
    path.CalculatePath(destx, desty, destz, false);

    // Check for valid path types before we proceed
    if (!(path.GetPathType() & PATHFIND_NOT_USING_PATH))
        if (path.GetPathType() & ~(PATHFIND_NORMAL | PATHFIND_SHORTCUT | PATHFIND_INCOMPLETE | PATHFIND_FARFROMPOLY_END))
            return;

    G3D::Vector3 result = path.GetPath().back();
    destx = result.x;
    desty = result.y;
    destz = result.z;

    // check static LOS
    float halfHeight = GetCollisionHeight() * 0.5f;
    bool col = false;

    // Unit is flying, check for potential collision via vmaps
    if (path.GetPathType() & PATHFIND_NOT_USING_PATH)
    {
        col = VMAP::VMapFactory::createOrGetVMapManager()->getObjectHitPos(PhasingHandler::GetTerrainMapId(GetPhaseShift(), GetMap(), pos.m_positionX, pos.m_positionY),
            pos.m_positionX, pos.m_positionY, pos.m_positionZ + halfHeight,
            destx, desty, destz + halfHeight,
            destx, desty, destz, -0.5f);

        destz -= halfHeight;

        // Collided with static LOS object, move back to collision point
        if (col)
        {
            destx -= CONTACT_DISTANCE * std::cos(angle);
            desty -= CONTACT_DISTANCE * std::sin(angle);
            dist = std::sqrt((pos.m_positionX - destx) * (pos.m_positionX - destx) + (pos.m_positionY - desty) * (pos.m_positionY - desty));
        }
    }

    // check dynamic collision
    col = GetMap()->getObjectHitPos(GetPhaseShift(),
        pos.m_positionX, pos.m_positionY, pos.m_positionZ + halfHeight,
        destx, desty, destz + halfHeight,
        destx, desty, destz, -0.5f);

    destz -= halfHeight;

    // Collided with a gameobject, move back to collision point
    if (col)
    {
        destx -= CONTACT_DISTANCE * std::cos(angle);
        desty -= CONTACT_DISTANCE * std::sin(angle);
        dist = std::sqrt((pos.m_positionX - destx)*(pos.m_positionX - destx) + (pos.m_positionY - desty) * (pos.m_positionY - desty));
    }

    float groundZ = VMAP_INVALID_HEIGHT_VALUE;
    Trinity::NormalizeMapCoord(pos.m_positionX);
    Trinity::NormalizeMapCoord(pos.m_positionY);
    UpdateAllowedPositionZ(destx, desty, destz, &groundZ);

    pos.SetOrientation(GetOrientation());
    pos.Relocate(destx, desty, destz);

    // position has no ground under it (or is too far away)
    if (groundZ <= INVALID_HEIGHT)
    {
        if (Unit const* unit = ToUnit())
        {
            // unit can fly, ignore.
            if (unit->CanFly())
                return;

            // fall back to gridHeight if any
            float gridHeight = GetMap()->GetGridHeight(GetPhaseShift(), pos.m_positionX, pos.m_positionY);
            if (gridHeight > INVALID_HEIGHT)
                pos.m_positionZ = gridHeight + unit->GetHoverOffset();
        }
    }
}

void WorldObject::PlayDistanceSound(uint32 soundId, Player* target /*= nullptr*/)
{
    if (target)
        target->SendDirectMessage(WorldPackets::Misc::PlaySpeakerbotSound(GetGUID(), soundId).Write());
    else
        SendMessageToSet(WorldPackets::Misc::PlaySpeakerbotSound(GetGUID(), soundId).Write(), true);
}

void WorldObject::PlayDirectSound(uint32 soundId, Player* target /*= nullptr*/, uint32 broadcastTextId /*= 0*/)
{
    if (target)
        target->SendDirectMessage(WorldPackets::Misc::PlaySound(GetGUID(), soundId, broadcastTextId).Write());
    else
        SendMessageToSet(WorldPackets::Misc::PlaySound(GetGUID(), soundId, broadcastTextId).Write(), true);
}

void WorldObject::PlayDirectMusic(uint32 musicId, Player* target /*= nullptr*/)
{
    if (target)
        target->SendDirectMessage(WorldPackets::Misc::PlayMusic(musicId).Write());
    else
        SendMessageToSet(WorldPackets::Misc::PlayMusic(musicId).Write(), true);
}

void WorldObject::DestroyForNearbyPlayers()
{
    if (!IsInWorld())
        return;

    std::list<Player*> targets;
    Trinity::AnyPlayerInObjectRangeCheck check(this, GetVisibilityRange(), false);
    Trinity::PlayerListSearcher<Trinity::AnyPlayerInObjectRangeCheck> searcher(this, targets, check);
    Cell::VisitWorldObjects(this, searcher, GetVisibilityRange());
    for (std::list<Player*>::const_iterator iter = targets.begin(); iter != targets.end(); ++iter)
    {
        Player* player = (*iter);

        if (player == this)
            continue;

        if (!player->HaveAtClient(this))
            continue;

        if (isType(TYPEMASK_UNIT) && ToUnit()->GetCharmerGUID() == player->GetGUID()) /// @todo this is for puppet
            continue;

        DestroyForPlayer(player);
        player->m_clientGUIDs.erase(GetGUID());
    }
}

void WorldObject::UpdateObjectVisibility(bool /*forced*/)
{
    //updates object's visibility for nearby players
    WorldObject* objects[] = { this };
    Trinity::VisibleChangesNotifier notifier({ std::begin(objects), std::end(objects) });
    Cell::VisitWorldObjects(this, notifier, GetVisibilityRange());
}

struct WorldObjectChangeAccumulator
{
    UpdateDataMapType& i_updateDatas;
    WorldObject& i_object;
    GuidSet plr_list;
    WorldObjectChangeAccumulator(WorldObject &obj, UpdateDataMapType &d) : i_updateDatas(d), i_object(obj) { }
    void Visit(PlayerMapType &m)
    {
        Player* source = nullptr;
        for (PlayerMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
        {
            source = iter->GetSource();

            BuildPacket(source);

            if (!source->GetSharedVisionList().empty())
            {
                SharedVisionList::const_iterator it = source->GetSharedVisionList().begin();
                for (; it != source->GetSharedVisionList().end(); ++it)
                    BuildPacket(*it);
            }
        }
    }

    void Visit(CreatureMapType &m)
    {
        Creature* source = nullptr;
        for (CreatureMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
        {
            source = iter->GetSource();
            if (!source->GetSharedVisionList().empty())
            {
                SharedVisionList::const_iterator it = source->GetSharedVisionList().begin();
                for (; it != source->GetSharedVisionList().end(); ++it)
                    BuildPacket(*it);
            }
        }
    }

    void Visit(DynamicObjectMapType &m)
    {
        DynamicObject* source = nullptr;
        for (DynamicObjectMapType::iterator iter = m.begin(); iter != m.end(); ++iter)
        {
            source = iter->GetSource();
            ObjectGuid guid = source->GetCasterGUID();

            if (guid.IsPlayer())
            {
                //Caster may be nullptr if DynObj is in removelist
                if (Player* caster = ObjectAccessor::FindPlayer(guid))
                    if (*caster->m_activePlayerData->FarsightObject == source->GetGUID())
                        BuildPacket(caster);
            }
        }
    }

    void BuildPacket(Player* player)
    {
        // Only send update once to a player
        if (plr_list.find(player->GetGUID()) == plr_list.end() && player->HaveAtClient(&i_object))
        {
            i_object.BuildFieldsUpdate(player, i_updateDatas);
            plr_list.insert(player->GetGUID());
        }
    }

    template<class SKIP> void Visit(GridRefManager<SKIP> &) { }
};

void WorldObject::BuildUpdate(UpdateDataMapType& data_map)
{
    WorldObjectChangeAccumulator notifier(*this, data_map);
    //we must build packets for all visible players
    Cell::VisitWorldObjects(this, notifier, GetVisibilityRange());

    ClearUpdateMask(false);
}

bool WorldObject::AddToObjectUpdate()
{
    GetMap()->AddUpdateObject(this);
    return true;
}

void WorldObject::RemoveFromObjectUpdate()
{
    GetMap()->RemoveUpdateObject(this);
}

ObjectGuid WorldObject::GetTransGUID() const
{
    if (GetTransport())
        return GetTransport()->GetGUID();
    return ObjectGuid::Empty;
}

float WorldObject::GetFloorZ() const
{
    if (!IsInWorld())
        return m_staticFloorZ;
    return std::max<float>(m_staticFloorZ, GetMap()->GetGameObjectFloor(GetPhaseShift(), GetPositionX(), GetPositionY(), GetPositionZ() + Z_OFFSET_FIND_HEIGHT));
}

float WorldObject::GetMapWaterOrGroundLevel(float x, float y, float z, float* ground/* = nullptr*/) const
{
    return GetMap()->GetWaterOrGroundLevel(GetPhaseShift(), x, y, z, ground,
        isType(TYPEMASK_UNIT) ? !static_cast<Unit const*>(this)->HasAuraType(SPELL_AURA_WATER_WALK) : false,
        GetCollisionHeight());
}

float WorldObject::GetMapHeight(float x, float y, float z, bool vmap/* = true*/, float distanceToSearch/* = DEFAULT_HEIGHT_SEARCH*/) const
{
    if (z != MAX_HEIGHT)
        z += Z_OFFSET_FIND_HEIGHT;

    return GetMap()->GetHeight(GetPhaseShift(), x, y, z, vmap, distanceToSearch);
}

std::string WorldObject::GetDebugInfo() const
{
    std::stringstream sstr;
    sstr << WorldLocation::GetDebugInfo() << "\n"
         << Object::GetDebugInfo() << "\n"
         << "Name: " << GetName();
    return sstr.str();
}

template TC_GAME_API void WorldObject::GetGameObjectListWithEntryInGrid(std::list<GameObject*>&, uint32, float) const;
template TC_GAME_API void WorldObject::GetGameObjectListWithEntryInGrid(std::deque<GameObject*>&, uint32, float) const;
template TC_GAME_API void WorldObject::GetGameObjectListWithEntryInGrid(std::vector<GameObject*>&, uint32, float) const;

template TC_GAME_API void WorldObject::GetCreatureListWithEntryInGrid(std::list<Creature*>&, uint32, float) const;
template TC_GAME_API void WorldObject::GetCreatureListWithEntryInGrid(std::deque<Creature*>&, uint32, float) const;
template TC_GAME_API void WorldObject::GetCreatureListWithEntryInGrid(std::vector<Creature*>&, uint32, float) const;

template TC_GAME_API void WorldObject::GetPlayerListInGrid(std::list<Player*>&, float, bool) const;
template TC_GAME_API void WorldObject::GetPlayerListInGrid(std::deque<Player*>&, float, bool) const;
template TC_GAME_API void WorldObject::GetPlayerListInGrid(std::vector<Player*>&, float, bool) const;