/*
 * Copyright (C) 2012-2020 CypherCore <http://github.com/CypherCore>
 * 
 * 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 3 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/>.
 */

using Framework.Constants;
using Game.AI;
using Game.Entities;
using Game.Scripting;
using Game.Spells;
using System;
using System.Collections.Generic;

namespace Scripts.EasternKingdoms.AlteracValley.Balinda
{
    struct SpellIds
    {
        public const uint ArcaneExplosion = 46608;
        public const uint ConeOfCold = 38384;
        public const uint Fireball = 46988;
        public const uint Frostbolt = 46987;
        public const uint SummonWaterElemental = 45067;
        public const uint Iceblock = 46604;
    }

    struct TextIds
    {
        public const uint SayAggro = 0;
        public const uint SayEvade = 1;
        public const uint SaySalvation = 2;
    }

    struct ActionIds
    {
        public const int BuffYell = -30001; // shared from Battleground
    }

    [Script]
    class boss_balinda : ScriptedAI
    {
        SummonList summons;
        ObjectGuid WaterElementalGUID;
        bool HasCastIceblock;

        public boss_balinda(Creature creature) : base(creature)
        {
            summons = new(me);
            Initialize();
        }

        void Initialize()
        {
            WaterElementalGUID.Clear();
            HasCastIceblock = false;
        }

        public override void Reset()
        {
            Initialize();
            _scheduler.CancelAll();
            summons.DespawnAll();
        }

        public override void JustEngagedWith(Unit who)
        {
            Talk(TextIds.SayAggro);
            _scheduler.Schedule(TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(15), task =>
            {
                DoCastVictim(SpellIds.ArcaneExplosion);
                task.Repeat();
            });
            _scheduler.Schedule(TimeSpan.FromSeconds(8), task =>
            {
                DoCastVictim(SpellIds.ConeOfCold);
                task.Repeat(TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(20));
            });
            _scheduler.Schedule(TimeSpan.FromSeconds(1), task =>
            {
                DoCastVictim(SpellIds.Fireball);
                task.Repeat(TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(9));
            });
            _scheduler.Schedule(TimeSpan.FromSeconds(4), task =>
            {
                DoCastVictim(SpellIds.Frostbolt);
                task.Repeat(TimeSpan.FromSeconds(4), TimeSpan.FromSeconds(12));
            });
            _scheduler.Schedule(TimeSpan.FromSeconds(3), task =>
            {
                if (summons.Empty())
                    DoCast(SpellIds.SummonWaterElemental);
                task.Repeat(TimeSpan.FromSeconds(50));
            });
            _scheduler.Schedule(TimeSpan.FromSeconds(5), task =>
            {
                if (me.GetDistance2d(me.GetHomePosition().GetPositionX(), me.GetHomePosition().GetPositionY()) > 50)
                {
                    EnterEvadeMode();
                    Talk(TextIds.SayEvade);
                }
                Creature elemental = ObjectAccessor.GetCreature(me, WaterElementalGUID);
                if (elemental != null)
                    if (elemental.GetDistance2d(me.GetHomePosition().GetPositionX(), me.GetHomePosition().GetPositionY()) > 50)
                        elemental.GetAI().EnterEvadeMode();
                task.Repeat();
            });
        }

        public override void JustSummoned(Creature summoned)
        {
            summoned.GetAI().AttackStart(SelectTarget(SelectTargetMethod.Random, 0, 50, true));
            summoned.SetFaction(me.GetFaction());
            WaterElementalGUID = summoned.GetGUID();
            summons.Summon(summoned);
        }

        public override void SummonedCreatureDespawn(Creature summoned)
        {
            summons.Despawn(summoned);
        }

        public override void JustDied(Unit killer)
        {
            summons.DespawnAll();
        }

        public override void DoAction(int actionId)
        {
            if (actionId == ActionIds.BuffYell)
                Talk(TextIds.SayAggro);
        }

        public override void DamageTaken(Unit attacker, ref uint damage, DamageEffectType damageType, SpellInfo spellInfo = null)
        {
            if (me.HealthBelowPctDamaged(40, damage) && !HasCastIceblock)
            {
                DoCast(SpellIds.Iceblock);
                HasCastIceblock = true;
            }
        }

        public override void UpdateAI(uint diff)
        {
            if (!UpdateVictim())
                return;

            _scheduler.Update(diff, () => DoMeleeAttackIfReady());
        }
    }
}