/*
 * This file is part of the AzerothCore 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 "BattlegroundAV.h"
#include "CreatureScript.h"
#include "ScriptedCreature.h"

enum Spells
{
    SPELL_CHARGE                                  = 22911,
    SPELL_CLEAVE                                  = 40504,
    SPELL_DEMORALIZING_SHOUT                      = 23511,
    SPELL_ENRAGE                                  = 8599,
    SPELL_WHIRLWIND                               = 13736,

    SPELL_NORTH_MARSHAL                           = 45828,
    SPELL_SOUTH_MARSHAL                           = 45829,
    SPELL_STONEHEARTH_MARSHAL                     = 45830,
    SPELL_ICEWING_MARSHAL                         = 45831,
    SPELL_ICEBLOOD_WARMASTER                      = 45822,
    SPELL_TOWER_POINT_WARMASTER                   = 45823,
    SPELL_WEST_FROSTWOLF_WARMASTER                = 45824,
    SPELL_EAST_FROSTWOLF_WARMASTER                = 45826
};

enum Creatures
{
    NPC_NORTH_MARSHAL                             = 14762,
    NPC_SOUTH_MARSHAL                             = 14763,
    NPC_ICEWING_MARSHAL                           = 14764,
    NPC_STONEHEARTH_MARSHAL                       = 14765,
    NPC_EAST_FROSTWOLF_WARMASTER                  = 14772,
    NPC_ICEBLOOD_WARMASTER                        = 14773,
    NPC_TOWER_POINT_WARMASTER                     = 14776,
    NPC_WEST_FROSTWOLF_WARMASTER                  = 14777
};

enum Events
{
    EVENT_CHARGE_TARGET        = 1,
    EVENT_CLEAVE               = 2,
    EVENT_DEMORALIZING_SHOUT   = 3,
    EVENT_WHIRLWIND            = 4,
    EVENT_ENRAGE               = 5,
    EVENT_CHECK_RESET          = 6
};

struct SpellPair
{
    uint32 npcEntry;
    uint32 spellId;
};

uint8 const MAX_SPELL_PAIRS = 8;
SpellPair const _auraPairs[MAX_SPELL_PAIRS] =
{
    { NPC_NORTH_MARSHAL,            SPELL_NORTH_MARSHAL },
    { NPC_SOUTH_MARSHAL,            SPELL_SOUTH_MARSHAL },
    { NPC_STONEHEARTH_MARSHAL,      SPELL_STONEHEARTH_MARSHAL },
    { NPC_ICEWING_MARSHAL,          SPELL_ICEWING_MARSHAL },
    { NPC_EAST_FROSTWOLF_WARMASTER, SPELL_EAST_FROSTWOLF_WARMASTER },
    { NPC_WEST_FROSTWOLF_WARMASTER, SPELL_WEST_FROSTWOLF_WARMASTER },
    { NPC_TOWER_POINT_WARMASTER,    SPELL_TOWER_POINT_WARMASTER },
    { NPC_ICEBLOOD_WARMASTER,       SPELL_ICEBLOOD_WARMASTER }
};

enum Factions
{
    FACTION_AV_ALLIANCE = 1534
};

class npc_av_marshal_or_warmaster : public CreatureScript
{
public:
    npc_av_marshal_or_warmaster() : CreatureScript("npc_av_marshal_or_warmaster") { }

    struct npc_av_marshal_or_warmasterAI : public ScriptedAI
    {
        npc_av_marshal_or_warmasterAI(Creature* creature) : ScriptedAI(creature) { }

        void Reset() override
        {
            events.Reset();
            events.ScheduleEvent(EVENT_CHARGE_TARGET, 2s, 12s);
            events.ScheduleEvent(EVENT_CLEAVE, 1s, 11s);
            events.ScheduleEvent(EVENT_DEMORALIZING_SHOUT, 2s);
            events.ScheduleEvent(EVENT_WHIRLWIND, 5s, 20s);
            events.ScheduleEvent(EVENT_ENRAGE, 5s, 20s);
            events.ScheduleEvent(EVENT_CHECK_RESET, 5s);

            _hasAura = false;
            _attacked = false;
        }

        void JustRespawned() override
        {
            Reset();
        }

        void AttackStart(Unit* victim) override
        {
            ScriptedAI::AttackStart(victim);

            if (!_attacked)
            {
                _attacked = true;

                // Boss should attack as well
                if (BattlegroundMap* bgMap = me->GetMap()->ToBattlegroundMap())
                {
                    if (Battleground* bg = bgMap->GetBG())
                    {
                        if (Creature* mainBoss = bg->GetBGCreature((me->GetFaction() == FACTION_AV_ALLIANCE ? AV_CPLACE_A_BOSS : AV_CPLACE_H_BOSS)))
                        {
                            if (mainBoss->IsAIEnabled && !mainBoss->GetVictim())
                            {
                                mainBoss->AI()->AttackStart(victim);
                            }
                        }
                    }
                }
            }
        }

        void EnterEvadeMode(EvadeReason why) override
        {
            ScriptedAI::EnterEvadeMode(why);

            if (_attacked)
            {
                _attacked = false;

                // Evade boss
                if (BattlegroundMap* bgMap = me->GetMap()->ToBattlegroundMap())
                {
                    if (Battleground* bg = bgMap->GetBG())
                    {
                        if (Creature* mainBoss = bg->GetBGCreature((me->GetFaction() == FACTION_AV_ALLIANCE ? AV_CPLACE_A_BOSS : AV_CPLACE_H_BOSS)))
                        {
                            if (mainBoss->IsAIEnabled && !mainBoss->IsInEvadeMode())
                            {
                                mainBoss->AI()->EnterEvadeMode();
                            }
                        }
                    }
                }
            }
        }

        void UpdateAI(uint32 diff) override
        {
            // I have a feeling this isn't blizzlike, but owell, I'm only passing by and cleaning up.
            if (!_hasAura)
            {
                for (uint8 i = 0; i < MAX_SPELL_PAIRS; ++i)
                    if (_auraPairs[i].npcEntry == me->GetEntry())
                        DoCast(me, _auraPairs[i].spellId);

                _hasAura = true;
            }

            if (!UpdateVictim())
                return;

            events.Update(diff);

            if (me->HasUnitState(UNIT_STATE_CASTING))
                return;

            while (uint32 eventId = events.ExecuteEvent())
            {
                switch (eventId)
                {
                    case EVENT_CHARGE_TARGET:
                        DoCastVictim(SPELL_CHARGE);
                        events.ScheduleEvent(EVENT_CHARGE, 10s, 25s);
                        break;
                    case EVENT_CLEAVE:
                        DoCastVictim(SPELL_CLEAVE);
                        events.ScheduleEvent(EVENT_CLEAVE, 10s, 16s);
                        break;
                    case EVENT_DEMORALIZING_SHOUT:
                        DoCast(me, SPELL_DEMORALIZING_SHOUT);
                        events.ScheduleEvent(EVENT_DEMORALIZING_SHOUT, 10s, 15s);
                        break;
                    case EVENT_WHIRLWIND:
                        DoCast(me, SPELL_WHIRLWIND);
                        events.ScheduleEvent(EVENT_WHIRLWIND, 10s, 25s);
                        break;
                    case EVENT_ENRAGE:
                        DoCast(me, SPELL_ENRAGE);
                        events.ScheduleEvent(EVENT_ENRAGE, 10s, 30s);
                        break;
                    case EVENT_CHECK_RESET:
                        {
                            Position const& _homePosition = me->GetHomePosition();
                            if (me->GetDistance2d(_homePosition.GetPositionX(), _homePosition.GetPositionY()) > 50.0f)
                            {
                                ScriptedAI::EnterEvadeMode();
                                return;
                            }
                            events.ScheduleEvent(EVENT_CHECK_RESET, 5s);
                            break;
                        }
                }
            }

            DoMeleeAttackIfReady();
        }

    private:
        EventMap events;
        bool _hasAura;
        bool _attacked;
    };

    CreatureAI* GetAI(Creature* creature) const override
    {
        return new npc_av_marshal_or_warmasterAI(creature);
    }
};

void AddSC_alterac_valley()
{
    new npc_av_marshal_or_warmaster();
}