/*
 * Copyright (C) 2008-2012 TrinityCore <http://www.trinitycore.org/>
 *
 * 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/>.
 */

/*
 * Scripts for spells with SPELLFAMILY_ROGUE and SPELLFAMILY_GENERIC spells used by rogue players.
 * Ordered alphabetically using scriptname.
 * Scriptnames of files in this file should be prefixed with "spell_rog_".
 */

#include "ScriptMgr.h"
#include "SpellScript.h"
#include "SpellAuraEffects.h"

enum RogueSpells
{
    ROGUE_SPELL_SHIV_TRIGGERED                   = 5940,
    ROGUE_SPELL_GLYPH_OF_PREPARATION             = 56819,
    ROGUE_SPELL_PREY_ON_THE_WEAK                 = 58670,
    ROGUE_SPELL_CHEAT_DEATH_COOLDOWN             = 31231,
};

// Cheat Death
class spell_rog_cheat_death : public SpellScriptLoader
{
    public:
        spell_rog_cheat_death() : SpellScriptLoader("spell_rog_cheat_death") { }

        class spell_rog_cheat_death_AuraScript : public AuraScript
        {
            PrepareAuraScript(spell_rog_cheat_death_AuraScript);

            uint32 absorbChance;

            bool Validate(SpellInfo const* /*spellEntry*/)
            {
                if (!sSpellMgr->GetSpellInfo(ROGUE_SPELL_CHEAT_DEATH_COOLDOWN))
                    return false;
                return true;
            }

            bool Load()
            {
                absorbChance = GetSpellInfo()->Effects[EFFECT_0].CalcValue();
                return GetUnitOwner()->ToPlayer();
            }

            void CalculateAmount(AuraEffect const* /*aurEff*/, int32 & amount, bool & /*canBeRecalculated*/)
            {
                // Set absorbtion amount to unlimited
                amount = -1;
            }

            void Absorb(AuraEffect* /*aurEff*/, DamageInfo & dmgInfo, uint32 & absorbAmount)
            {
                Player* target = GetTarget()->ToPlayer();
                if (dmgInfo.GetDamage() < target->GetHealth() || target->HasSpellCooldown(ROGUE_SPELL_CHEAT_DEATH_COOLDOWN) ||  !roll_chance_i(absorbChance))
                    return;

                target->CastSpell(target, ROGUE_SPELL_CHEAT_DEATH_COOLDOWN, true);
                target->AddSpellCooldown(ROGUE_SPELL_CHEAT_DEATH_COOLDOWN, 0, time(NULL) + 60);

                uint32 health10 = target->CountPctFromMaxHealth(10);

                // hp > 10% - absorb hp till 10%
                if (target->GetHealth() > health10)
                    absorbAmount = dmgInfo.GetDamage() - target->GetHealth() + health10;
                // hp lower than 10% - absorb everything
                else
                    absorbAmount = dmgInfo.GetDamage();
            }

            void Register()
            {
                DoEffectCalcAmount += AuraEffectCalcAmountFn(spell_rog_cheat_death_AuraScript::CalculateAmount, EFFECT_0, SPELL_AURA_SCHOOL_ABSORB);
                OnEffectAbsorb += AuraEffectAbsorbFn(spell_rog_cheat_death_AuraScript::Absorb, EFFECT_0);
            }
        };

        AuraScript* GetAuraScript() const
        {
            return new spell_rog_cheat_death_AuraScript();
        }
};

// 31130 - Nerves of Steel
class spell_rog_nerves_of_steel : public SpellScriptLoader
{
    public:
        spell_rog_nerves_of_steel() : SpellScriptLoader("spell_rog_nerves_of_steel") { }

        class spell_rog_nerves_of_steel_AuraScript : public AuraScript
        {
            PrepareAuraScript(spell_rog_nerves_of_steel_AuraScript);

            uint32 absorbPct;

            bool Load()
            {
                absorbPct = GetSpellInfo()->Effects[EFFECT_0].CalcValue(GetCaster());
                return true;
            }

            void CalculateAmount(AuraEffect const* /*aurEff*/, int32 & amount, bool & /*canBeRecalculated*/)
            {
                // Set absorbtion amount to unlimited
                amount = -1;
            }

            void Absorb(AuraEffect* /*aurEff*/, DamageInfo & dmgInfo, uint32 & absorbAmount)
            {
                // reduces all damage taken while stun or fear
                if (GetTarget()->GetUInt32Value(UNIT_FIELD_FLAGS) & (UNIT_FLAG_FLEEING) || (GetTarget()->GetUInt32Value(UNIT_FIELD_FLAGS) & (UNIT_FLAG_STUNNED) && GetTarget()->HasAuraWithMechanic(1<<MECHANIC_STUN)))
                    absorbAmount = CalculatePctN(dmgInfo.GetDamage(), absorbPct);
            }

            void Register()
            {
                 DoEffectCalcAmount += AuraEffectCalcAmountFn(spell_rog_nerves_of_steel_AuraScript::CalculateAmount, EFFECT_0, SPELL_AURA_SCHOOL_ABSORB);
                 OnEffectAbsorb += AuraEffectAbsorbFn(spell_rog_nerves_of_steel_AuraScript::Absorb, EFFECT_0);
            }
        };

        AuraScript* GetAuraScript() const
        {
            return new spell_rog_nerves_of_steel_AuraScript();
        }
};

class spell_rog_preparation : public SpellScriptLoader
{
    public:
        spell_rog_preparation() : SpellScriptLoader("spell_rog_preparation") { }

        class spell_rog_preparation_SpellScript : public SpellScript
        {
            PrepareSpellScript(spell_rog_preparation_SpellScript);

            bool Load()
            {
                return GetCaster()->GetTypeId() == TYPEID_PLAYER;
            }

            bool Validate(SpellInfo const* /*spellEntry*/)
            {
                if (!sSpellMgr->GetSpellInfo(ROGUE_SPELL_GLYPH_OF_PREPARATION))
                    return false;
                return true;
            }

            void HandleDummy(SpellEffIndex /*effIndex*/)
            {
                Player* caster = GetCaster()->ToPlayer();

                //immediately finishes the cooldown on certain Rogue abilities
                const SpellCooldowns& cm = caster->GetSpellCooldownMap();
                for (SpellCooldowns::const_iterator itr = cm.begin(); itr != cm.end();)
                {
                    SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(itr->first);

                    if (spellInfo->SpellFamilyName == SPELLFAMILY_ROGUE)
                    {
                        if (spellInfo->SpellFamilyFlags[1] & SPELLFAMILYFLAG1_ROGUE_COLDB_SHADOWSTEP ||      // Cold Blood, Shadowstep
                            spellInfo->SpellFamilyFlags[0] & SPELLFAMILYFLAG_ROGUE_VAN_EVAS_SPRINT)           // Vanish, Evasion, Sprint
                            caster->RemoveSpellCooldown((itr++)->first, true);
                        else if (caster->HasAura(ROGUE_SPELL_GLYPH_OF_PREPARATION))
                        {
                            if (spellInfo->SpellFamilyFlags[1] & SPELLFAMILYFLAG1_ROGUE_DISMANTLE ||         // Dismantle
                                spellInfo->SpellFamilyFlags[0] & SPELLFAMILYFLAG_ROGUE_KICK ||               // Kick
                                (spellInfo->SpellFamilyFlags[0] & SPELLFAMILYFLAG_ROGUE_BLADE_FLURRY &&     // Blade Flurry
                                spellInfo->SpellFamilyFlags[1] & SPELLFAMILYFLAG1_ROGUE_BLADE_FLURRY))
                                caster->RemoveSpellCooldown((itr++)->first, true);
                            else
                                ++itr;
                        }
                        else
                            ++itr;
                    }
                    else
                        ++itr;
                }
            }

            void Register()
            {
                // add dummy effect spell handler to Preparation
                OnEffectHitTarget += SpellEffectFn(spell_rog_preparation_SpellScript::HandleDummy, EFFECT_0, SPELL_EFFECT_DUMMY);
            }
        };

        SpellScript* GetSpellScript() const
        {
            return new spell_rog_preparation_SpellScript();
        }
};

// 51685-51689 Prey on the Weak
class spell_rog_prey_on_the_weak : public SpellScriptLoader
{
public:
    spell_rog_prey_on_the_weak() : SpellScriptLoader("spell_rog_prey_on_the_weak") { }

    class spell_rog_prey_on_the_weak_AuraScript : public AuraScript
    {
        PrepareAuraScript(spell_rog_prey_on_the_weak_AuraScript);

        bool Validate(SpellInfo const* /*spellEntry*/)
        {
            if (!sSpellMgr->GetSpellInfo(ROGUE_SPELL_PREY_ON_THE_WEAK))
                return false;
            return true;
        }

        void HandleEffectPeriodic(AuraEffect const* /*aurEff*/)
        {
            Unit* target = GetTarget();
            Unit* victim = target->getVictim();
            if (victim && (target->GetHealthPct() > victim->GetHealthPct()))
            {
                if (!target->HasAura(ROGUE_SPELL_PREY_ON_THE_WEAK))
                {
                    int32 bp = GetSpellInfo()->Effects[EFFECT_0].CalcValue();
                    target->CastCustomSpell(target, ROGUE_SPELL_PREY_ON_THE_WEAK, &bp, 0, 0, true);
                }
            }
            else
                target->RemoveAurasDueToSpell(ROGUE_SPELL_PREY_ON_THE_WEAK);
        }

        void Register()
        {
            OnEffectPeriodic += AuraEffectPeriodicFn(spell_rog_prey_on_the_weak_AuraScript::HandleEffectPeriodic, EFFECT_0, SPELL_AURA_PERIODIC_DUMMY);
        }
    };

    AuraScript* GetAuraScript() const
    {
        return new spell_rog_prey_on_the_weak_AuraScript();
    }
};

class spell_rog_shiv : public SpellScriptLoader
{
    public:
        spell_rog_shiv() : SpellScriptLoader("spell_rog_shiv") { }

        class spell_rog_shiv_SpellScript : public SpellScript
        {
            PrepareSpellScript(spell_rog_shiv_SpellScript);

            bool Load()
            {
                return GetCaster()->GetTypeId() == TYPEID_PLAYER;
            }

            bool Validate(SpellInfo const* /*spellEntry*/)
            {
                if (!sSpellMgr->GetSpellInfo(ROGUE_SPELL_SHIV_TRIGGERED))
                    return false;
                return true;
            }

            void HandleDummy(SpellEffIndex /*effIndex*/)
            {
                Unit* caster = GetCaster();
                if (Unit* unitTarget = GetHitUnit())
                    caster->CastSpell(unitTarget, ROGUE_SPELL_SHIV_TRIGGERED, true);
            }

            void Register()
            {
                // add dummy effect spell handler to Shiv
                OnEffectHitTarget += SpellEffectFn(spell_rog_shiv_SpellScript::HandleDummy, EFFECT_0, SPELL_EFFECT_DUMMY);
            }
        };

        SpellScript* GetSpellScript() const
        {
            return new spell_rog_shiv_SpellScript();
        }
};

class spell_rog_deadly_poison : public SpellScriptLoader
{
    public:
        spell_rog_deadly_poison() : SpellScriptLoader("spell_rog_deadly_poison") { }

        class spell_rog_deadly_poison_SpellScript : public SpellScript
        {
            PrepareSpellScript(spell_rog_deadly_poison_SpellScript);

            bool Load()
            {
                _stackAmount = 0;
                // at this point CastItem must already be initialized
                return GetCaster()->GetTypeId() == TYPEID_PLAYER && GetCastItem();
            }

            void HandleBeforeHit()
            {
                if (Unit* target = GetHitUnit())
                    // Deadly Poison
                    if (AuraEffect const* aurEff = target->GetAuraEffect(SPELL_AURA_PERIODIC_DAMAGE, SPELLFAMILY_ROGUE, 0x10000, 0x80000, 0, GetCaster()->GetGUID()))
                        _stackAmount = aurEff->GetBase()->GetStackAmount();
            }

            void HandleAfterHit()
            {
                if (_stackAmount < 5)
                    return;

                Player* player = GetCaster()->ToPlayer();

                if (Unit* target = GetHitUnit())
                {

                    Item* item = player->GetItemByPos(INVENTORY_SLOT_BAG_0, EQUIPMENT_SLOT_MAINHAND);

                    if (item == GetCastItem())
                        item = player->GetItemByPos(INVENTORY_SLOT_BAG_0, EQUIPMENT_SLOT_OFFHAND);

                    if (!item)
                        return;

                    // item combat enchantments
                    for (uint8 slot = 0; slot < MAX_ENCHANTMENT_SLOT; ++slot)
                    {
                        SpellItemEnchantmentEntry const* enchant = sSpellItemEnchantmentStore.LookupEntry(item->GetEnchantmentId(EnchantmentSlot(slot)));
                        if (!enchant)
                            continue;

                        for (uint8 s = 0; s < 3; ++s)
                        {
                            if (enchant->type[s] != ITEM_ENCHANTMENT_TYPE_COMBAT_SPELL)
                                continue;

                            SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(enchant->spellid[s]);
                            if (!spellInfo)
                            {
                                sLog->outError("Player::CastItemCombatSpell Enchant %i, player (Name: %s, GUID: %u) cast unknown spell %i", enchant->ID, player->GetName(), player->GetGUIDLow(), enchant->spellid[s]);
                                continue;
                            }

                            // Proc only rogue poisons
                            if (spellInfo->SpellFamilyName != SPELLFAMILY_ROGUE || spellInfo->Dispel != DISPEL_POISON)
                                continue;

                            // Do not reproc deadly
                            if (spellInfo->SpellFamilyFlags.IsEqual(0x10000, 0x80000, 0))
                                continue;

                            if (spellInfo->IsPositive())
                                player->CastSpell(player, enchant->spellid[s], true, item);
                            else
                                player->CastSpell(target, enchant->spellid[s], true, item);
                        }
                    }
                }
            }

            void Register()
            {
                BeforeHit += SpellHitFn(spell_rog_deadly_poison_SpellScript::HandleBeforeHit);
                AfterHit += SpellHitFn(spell_rog_deadly_poison_SpellScript::HandleAfterHit);
            }

            uint8 _stackAmount;
        };

        SpellScript* GetSpellScript() const
        {
            return new spell_rog_deadly_poison_SpellScript();
        }
};

void AddSC_rogue_spell_scripts()
{
    new spell_rog_cheat_death();
    new spell_rog_nerves_of_steel();
    new spell_rog_preparation();
    new spell_rog_prey_on_the_weak();
    new spell_rog_shiv();
    new spell_rog_deadly_poison();
}