/*
 * 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 "tc_catch2.h"
#include "LuaEngineTestFixture.h"

/**
 * @brief Phase 3 Tests: Complex Integration and Game Scenarios
 * 
 * These tests verify complex multi-component scenarios
 */

TEST_CASE("Game Event Hooks - Event Handler Patterns", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("World update event pattern")
    {
        std::string script = R"(
            world_state = {tick = 0, updates = 0}
            function on_world_update(diff)
                world_state.tick = world_state.tick + diff
                world_state.updates = world_state.updates + 1
            end
            on_world_update(100)
            on_world_update(100)
            on_world_update(100)
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "world_state.tick") == 300);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "world_state.updates") == 3);
    }

    SECTION("Player event pattern")
    {
        std::string script = R"(
            player_events = {}
            function on_player_login(player_id, player_name)
                table.insert(player_events, {event = 'login', id = player_id, name = player_name})
            end
            on_player_login(1, 'Alice')
            on_player_login(2, 'Bob')
            event_count = #player_events
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "event_count") == 2);
    }

    SECTION("Creature event pattern")
    {
        std::string script = R"(
            creature_events = {}
            function on_creature_spawn(creature_id, creature_name)
                table.insert(creature_events, {event = 'spawn', id = creature_id, name = creature_name})
            end
            on_creature_spawn(100, 'Goblin')
            on_creature_spawn(101, 'Orc')
            event_count = #creature_events
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "event_count") == 2);
    }
}

TEST_CASE("Query Processing - Query Pattern Simulation", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("Async query callback pattern")
    {
        std::string script = R"(
            query_results = {}
            function on_query_complete(query_id, result_data)
                table.insert(query_results, {id = query_id, data = result_data})
            end
            function execute_query(query_id, query_string)
                local result = {rows = 5, status = 'success'}
                on_query_complete(query_id, result)
            end
            execute_query(1, 'SELECT * FROM players')
            execute_query(2, 'SELECT * FROM creatures')
            result_count = #query_results
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "result_count") == 2);
    }

    SECTION("Query result processing")
    {
        std::string script = R"(
            processed_data = {}
            function process_query_result(query_result)
                local processed = {row_count = query_result.rows, success = query_result.status == 'success'}
                table.insert(processed_data, processed)
            end
            process_query_result({rows = 10, status = 'success'})
            process_query_result({rows = 0, status = 'error'})
            process_query_result({rows = 25, status = 'success'})
            success_count = 0
            for i, data in ipairs(processed_data) do
                if data.success then success_count = success_count + 1 end
            end
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "success_count") == 2);
    }
}

TEST_CASE("Complex Scenarios - Multi-System Game World", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("Complete game world simulation")
    {
        std::string script = R"(
            world = {players = {}, creatures = {}, items = {}, events = {}}
            function add_player(id, name, level)
                table.insert(world.players, {id = id, name = name, level = level})
            end
            function spawn_creature(id, name, health)
                table.insert(world.creatures, {id = id, name = name, health = health})
            end
            function create_item(id, name, rarity)
                table.insert(world.items, {id = id, name = name, rarity = rarity})
            end
            function log_event(event_type, data)
                table.insert(world.events, {type = event_type, data = data})
            end
            add_player(1, 'Hero', 50)
            add_player(2, 'Mage', 48)
            spawn_creature(100, 'Goblin', 30)
            spawn_creature(101, 'Orc', 50)
            create_item(1000, 'Sword', 'rare')
            create_item(1001, 'Shield', 'common')
            log_event('combat', {attacker = 1, target = 100})
            log_event('loot', {player = 1, item = 1000})
            player_count = #world.players
            creature_count = #world.creatures
            item_count = #world.items
            event_count = #world.events
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "player_count") == 2);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "creature_count") == 2);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "item_count") == 2);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "event_count") == 2);
    }

    SECTION("Dynamic world state management")
    {
        std::string script = R"(
            state = {day_cycle = 0, weather = 'clear', active_events = {}}
            function update_world(delta_time)
                state.day_cycle = state.day_cycle + delta_time
                if state.day_cycle > 1440 then state.day_cycle = 0 end
            end
            function trigger_event(event_name)
                table.insert(state.active_events, event_name)
            end
            update_world(100)
            update_world(200)
            update_world(300)
            trigger_event('dragon_spawn')
            trigger_event('meteor_shower')
            total_time = state.day_cycle
            event_count = #state.active_events
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "total_time") == 600);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "event_count") == 2);
    }
}

TEST_CASE("Complex Scenarios - Dungeon Instance Management", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("Instance lifecycle management")
    {
        std::string script = R"(
            instances = {}
            function create_instance(instance_id, map_id, difficulty)
                local instance = {id = instance_id, map = map_id, difficulty = difficulty, players = {}, bosses = {}}
                instances[instance_id] = instance
            end
            function add_player_to_instance(instance_id, player_id)
                if instances[instance_id] then
                    table.insert(instances[instance_id].players, player_id)
                end
            end
            function spawn_boss(instance_id, boss_id, boss_name)
                if instances[instance_id] then
                    table.insert(instances[instance_id].bosses, {id = boss_id, name = boss_name, health = 100})
                end
            end
            create_instance(1, 100, 'normal')
            add_player_to_instance(1, 1)
            add_player_to_instance(1, 2)
            add_player_to_instance(1, 3)
            spawn_boss(1, 1000, 'Boss1')
            spawn_boss(1, 1001, 'Boss2')
            instance_players = #instances[1].players
            instance_bosses = #instances[1].bosses
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "instance_players") == 3);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "instance_bosses") == 2);
    }

    SECTION("Boss encounter progression")
    {
        std::string script = R"(
            encounter = {bosses = {}, phase = 1, progress = 0}
            function add_boss(boss_id, boss_name, health)
                table.insert(encounter.bosses, {id = boss_id, name = boss_name, health = health, defeated = false})
            end
            function damage_boss(boss_index, damage)
                if encounter.bosses[boss_index] then
                    encounter.bosses[boss_index].health = encounter.bosses[boss_index].health - damage
                    if encounter.bosses[boss_index].health <= 0 then
                        encounter.bosses[boss_index].defeated = true
                        encounter.progress = encounter.progress + 1
                    end
                end
            end
            add_boss(1, 'Boss1', 100)
            add_boss(2, 'Boss2', 100)
            damage_boss(1, 150)
            damage_boss(2, 150)
            if encounter.progress >= 2 then encounter.phase = 2 end
            phase = encounter.phase
            progress = encounter.progress
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "phase") == 2);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "progress") == 2);
    }
}

TEST_CASE("Complex Scenarios - Guild and Group Systems", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("Guild management system")
    {
        std::string script = R"(
            guilds = {}
            function create_guild(guild_id, guild_name, leader_id)
                local guild = {id = guild_id, name = guild_name, leader = leader_id, members = {leader_id}, treasury = 0}
                guilds[guild_id] = guild
            end
            function add_member(guild_id, player_id)
                if guilds[guild_id] then table.insert(guilds[guild_id].members, player_id) end
            end
            function deposit_gold(guild_id, amount)
                if guilds[guild_id] then guilds[guild_id].treasury = guilds[guild_id].treasury + amount end
            end
            create_guild(1, 'Legends', 1)
            add_member(1, 2)
            add_member(1, 3)
            add_member(1, 4)
            deposit_gold(1, 1000)
            deposit_gold(1, 500)
            member_count = #guilds[1].members
            treasury = guilds[1].treasury
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "member_count") == 4);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "treasury") == 1500);
    }

    SECTION("Group management")
    {
        std::string script = R"(
            groups = {}
            function create_group(group_id, leader_id)
                local group = {id = group_id, leader = leader_id, members = {leader_id}, max_members = 5}
                groups[group_id] = group
            end
            function add_to_group(group_id, player_id)
                if groups[group_id] and #groups[group_id].members < groups[group_id].max_members then
                    table.insert(groups[group_id].members, player_id)
                    return true
                end
                return false
            end
            create_group(1, 1)
            add_to_group(1, 2)
            add_to_group(1, 3)
            add_to_group(1, 4)
            add_to_group(1, 5)
            member_count = #groups[1].members
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "member_count") == 5);
    }
}

TEST_CASE("Complex Scenarios - Quest and Achievement Systems", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("Quest progression system")
    {
        std::string script = R"(
            quests = {}
            function create_quest(quest_id, title, objectives_count)
                local quest = {id = quest_id, title = title, objectives = {}, completed = false}
                for i = 1, objectives_count do
                    table.insert(quest.objectives, {id = i, completed = false})
                end
                quests[quest_id] = quest
            end
            function complete_objective(quest_id, objective_id)
                if quests[quest_id] and quests[quest_id].objectives[objective_id] then
                    quests[quest_id].objectives[objective_id].completed = true
                end
            end
            function check_quest_completion(quest_id)
                if quests[quest_id] then
                    local all_complete = true
                    for i, obj in ipairs(quests[quest_id].objectives) do
                        if not obj.completed then all_complete = false break end
                    end
                    quests[quest_id].completed = all_complete
                    return all_complete
                end
                return false
            end
            create_quest(1, 'Defeat Goblins', 3)
            complete_objective(1, 1)
            complete_objective(1, 2)
            complete_objective(1, 3)
            check_quest_completion(1)
            is_completed = quests[1].completed
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsBoolean(eluna, "is_completed") == true);
    }

    SECTION("Achievement tracking system")
    {
        std::string script = R"(
            achievements = {}
            player_achievements = {}
            function register_achievement(achievement_id, name, points)
                achievements[achievement_id] = {id = achievement_id, name = name, points = points}
            end
            function unlock_achievement(player_id, achievement_id)
                if not player_achievements[player_id] then player_achievements[player_id] = {} end
                if achievements[achievement_id] then
                    table.insert(player_achievements[player_id], achievement_id)
                    return true
                end
                return false
            end
            function get_player_points(player_id)
                local points = 0
                if player_achievements[player_id] then
                    for i, ach_id in ipairs(player_achievements[player_id]) do
                        if achievements[ach_id] then points = points + achievements[ach_id].points end
                    end
                end
                return points
            end
            register_achievement(1, 'First Blood', 10)
            register_achievement(2, 'Monster Slayer', 25)
            register_achievement(3, 'Legend', 50)
            unlock_achievement(1, 1)
            unlock_achievement(1, 2)
            unlock_achievement(1, 3)
            total_points = get_player_points(1)
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "total_points") == 85);
    }
}

TEST_CASE("Complex Scenarios - Economy and Trading", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("Player economy system")
    {
        std::string script = R"(
            players = {}
            function create_player(player_id, name, gold)
                players[player_id] = {id = player_id, name = name, gold = gold}
            end
            function transfer_gold(from_id, to_id, amount)
                if players[from_id] and players[to_id] then
                    if players[from_id].gold >= amount then
                        players[from_id].gold = players[from_id].gold - amount
                        players[to_id].gold = players[to_id].gold + amount
                        return true
                    end
                end
                return false
            end
            create_player(1, 'Alice', 1000)
            create_player(2, 'Bob', 500)
            transfer_gold(1, 2, 200)
            transfer_gold(2, 1, 100)
            alice_gold = players[1].gold
            bob_gold = players[2].gold
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "alice_gold") == 900);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "bob_gold") == 600);
    }

    SECTION("Auction house system")
    {
        std::string script = R"(
            auctions = {}
            auction_counter = 0
            function post_auction(seller_id, item_name, starting_bid, duration)
                auction_counter = auction_counter + 1
                local auction = {id = auction_counter, seller = seller_id, item = item_name, bid = starting_bid}
                table.insert(auctions, auction)
                return auction.id
            end
            function place_bid(auction_id, bidder_id, bid_amount)
                for i, auction in ipairs(auctions) do
                    if auction.id == auction_id then
                        if bid_amount > auction.bid then
                            auction.bid = bid_amount
                            auction.bidder = bidder_id
                            return true
                        end
                    end
                end
                return false
            end
            post_auction(1, 'Sword', 100, 24)
            post_auction(1, 'Shield', 50, 24)
            place_bid(1, 2, 150)
            place_bid(1, 3, 200)
            place_bid(2, 2, 75)
            auction_count = #auctions
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "auction_count") == 2);
    }
}

TEST_CASE("Complex Scenarios - Error Recovery and Resilience", "[LuaEngine][LuaEngineIntegration]")
{
    LuaEngineTestFixture fixture;
    Eluna* eluna = fixture.CreateGlobalElunaInstance();
    REQUIRE(eluna != nullptr);

    SECTION("Graceful degradation on errors")
    {
        std::string script = R"(
            system_state = {errors = 0, warnings = 0, operations = 0}
            function safe_operation(operation_func)
                system_state.operations = system_state.operations + 1
                if operation_func then return true else system_state.errors = system_state.errors + 1 return false end
            end
            safe_operation(true)
            safe_operation(true)
            safe_operation(false)
            safe_operation(true)
            error_count = system_state.errors
            operation_count = system_state.operations
        )";
        REQUIRE(fixture.ExecuteScript(eluna, script));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "error_count") == 1);
        REQUIRE(fixture.GetGlobalAsInt(eluna, "operation_count") == 4);
    }

    SECTION("State preservation after errors")
    {
        REQUIRE(fixture.ExecuteScript(eluna, "game_state = {level = 1, exp = 0}"));
        REQUIRE(!fixture.ExecuteScript(eluna, "undefined_function()"));
        REQUIRE(fixture.ExecuteScript(eluna, "result = game_state.level"));
        REQUIRE(fixture.GetGlobalAsInt(eluna, "result") == 1);
    }
}