using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AOT.PostProcess.BlackArea;
using Gameplay.PostProcess.BlackArea;
using Gameplay.Summon;
using Gameplay.Unit;
using PhxhSDK;
using UnityEngine;

namespace Gameplay.Bullet
{
    using cfg.BuffCfg;
    using cfg.BulletCfg;
    using Character;
    using Framework;
    using Buff;
    using Skill;
    using Area;
    using Common;
    using cfg.SkillCfg;

    public class BulletManager
    {

        private static BulletManager _instance;

        public static BulletManager instance
        {
            get
            {
                if (_instance == null)
                {
                    DebugUtil.LogError("Bullet尚未初始化,请先初始化");
                    return null;
                }
                return _instance;
            }
        }

        public static BulletManager CreateInstance()
        {
            if (_instance != null)
            {
                DebugUtil.LogError("请勿重复创建BulletManager");
                return _instance;
            }
            _instance = new BulletManager();
            return _instance;
        }

        public GameObject rootObj;

        private readonly List<ViewBullet> _bullets;
        private readonly List<ViewBullet> _readyBullets;
        private readonly Dictionary<string, int> _loadCount;

        private BulletManager()
        {
            _bullets = new List<ViewBullet>();
            _readyBullets = new List<ViewBullet>();
            _loadCount = new Dictionary<string, int>();
        }

        public void Init()
        {
            rootObj = new GameObject("BulletManager");
        }

        public void RecordLoadCount(string path)
        {
            if (_loadCount.ContainsKey(path))
            {
                _loadCount[path]++;
            }
            else
            {
                _loadCount.Add(path, 1);
            }
        }
        
        public void Dispose()
        {
            // 进行资源清理
            foreach (var kv in _loadCount)
            {
                var path = kv.Key;
                var count = kv.Value;
                for (var i = 0; i < count; ++i)
                {
                    AssetManager.Instance.Unload(path);
                }
            }
            
            _bullets.Clear();
            _readyBullets.Clear();
            _loadCount.Clear();
            
            rootObj.Destroy();
            _instance = null;
        }

        public void LogicUpdate(float dt)
        {
            for (var i = 0; i < _readyBullets.Count; ++i)
            {
                var bullet = _readyBullets[i];
                bullet.Init();
            }

            _bullets.AddRange(_readyBullets);
            _readyBullets.Clear();

            for (var i = 0; i < _bullets.Count; ++i)
            {
                var bullet = _bullets[i];

                // 技能特殊暂停
                if (SkillManager.instance.needSkillPaused
                    && bullet.sender != SkillManager.instance.inSkillingUnit)
                {
                    continue;
                }
                bullet.LogicUpdate(dt);

                if (bullet.needRemove)
                {
                    _bullets.RemoveAt(i);
                    i--;
                }
            }
        }

        /// <summary>
        /// 普通攻击走特殊处理
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="receiver"></param>
        public void DoNormalShoot(GameUnit sender,
            GameUnit receiver)
        {
            // _ = AudioManager.Instance.PlayAudio(1001, sender.transData.pos);
            // 理论上可以走立马销毁的子弹逻辑,但是这里处理成直接addbuff,减少性能消耗

            // 造成伤害
            var normalDamageBuff = BuffManager.instance.CreateBuffById(sender, InnerBuffID.NORMAL_DAMAGE);
            BuffManager.instance.AddBuff(receiver, normalDamageBuff);

            // 打击士气
            var moraleDamageBuff = BuffManager.instance.CreateBuffById(sender, InnerBuffID.MORALE_DAMAGE);
            BuffManager.instance.AddBuff(receiver, moraleDamageBuff);
            
        }

        public ViewBullet EmitBullet(int bulletId,
            GameUnit targetUnit,
            GameUnit sender)
        {
            var bulletConfig = GetConfigById(bulletId);
            if (bulletConfig == null)
            {
                DebugUtil.LogError("不存在的子弹配置:{0}", bulletId);
                return null;
            }

            ViewBullet result = null;
            switch (bulletConfig.BulletType)
            {
                case EBulletType.DIRECT_DAMAGE:
                    // 直接造成伤害
                    AddBuffs2Unit(targetUnit, sender, bulletConfig);
                    break;
                case EBulletType.POS_LOCK:
                    // 锁地板
                    result = _EmitLockPosBullet(targetUnit.transData.cellIndex, sender, bulletConfig);
                    break;
                case EBulletType.UNIT_LOCK:
                    // 锁单位
                    result = _EmitLockUnitBullet(targetUnit, sender, bulletConfig);
                    break;
                default:
                    DebugUtil.LogError("暂未实现的子弹类型:{0}", bulletConfig.BulletType);
                    break;
            }

            if (result != null)
            {
                _readyBullets.Add(result);
            }
            return result;
        }

        public ViewBullet EmitBulletFromSummon(int bulletId, int cellIndex, BaseSummon summon)
        {
            return EmitBullet(bulletId, cellIndex, summon.creator);
        }
        
        public ViewBullet EmitBulletFromSummon(int bulletId, GameUnit target, BaseSummon summon)
        {
            return EmitBullet(bulletId, target, summon.creator);
        }

        public ViewBullet EmitBullet(int bulletId,
            int cellIndex,
            GameUnit sender)
        {
            var bulletConfig = GetConfigById(bulletId);
            if (bulletConfig == null)
            {
                DebugUtil.LogError("不存在的子弹配置:{0}", bulletId);
                return null;
            }

            ViewBullet result = null;
            switch (bulletConfig.BulletType)
            {
                case EBulletType.DIRECT_DAMAGE:
                    // 直接造成伤害
                    AddBuffs2CellIndex(cellIndex, sender, bulletConfig);
                    break;
                case EBulletType.POS_LOCK:
                    // 锁地板
                    result = _EmitLockPosBullet(cellIndex, sender, bulletConfig);
                    break;
                case EBulletType.UNIT_LOCK:
                    // 锁单位
                    result = _EmitLockUnitBullet(cellIndex, sender, bulletConfig);
                    break;
                default:
                    DebugUtil.LogError("暂未实现的子弹类型:{0}", bulletConfig.BulletType);
                    break;
            }

            if (result != null)
            {
                _readyBullets.Add(result);
            }
            return result;
        }

        private ViewBullet _EmitLockUnitBullet(GameUnit targetUnit,
            GameUnit sender,
            DataBullet bulletConfig)
        {
            var bullet = new ViewBullet(bulletConfig, sender);
            if (!_CheckBulletFilter(sender, targetUnit, bulletConfig))
            {
                bullet.LockPos(targetUnit.transData.cellIndex);
                return bullet;
            }
            bullet.LockUnit(targetUnit);
            return bullet;
        }

        private ViewBullet _EmitLockUnitBullet(int targetCellIndex,
            GameUnit sender,
            DataBullet bulletConfig)
        {
            var bullet = new ViewBullet(bulletConfig, sender);
            var units = AreaManager.instance.GetUnitsByCellIndex(targetCellIndex);
            var isLocked = false;
            for (var i = 0; i < units.Count; ++i)
            {
                var unit = units[i];
                if (!_CheckBulletFilter(sender, unit, bulletConfig))
                {
                    continue;
                }
                bullet.LockUnit(unit);
                isLocked = true;
                break;
            }
            if (!isLocked)
            {
                // 如果没有目标，锁地板
                DebugUtil.LogError("目标错误.保护处理,锁定当前地板");
                bullet.LockPos(targetCellIndex);
            }
            return bullet;
        }

        public void PreSelectUnits(int cellIndex,
            int bulletId, GameUnit sender,
            List<GameUnit> selectUnits)
        {
            var bulletConfig = GetConfigById(bulletId);
            if (bulletConfig == null) return;
            var units = AreaManager.instance.GetUnitsByCellIndex(cellIndex);
            for (var i = 0; i < units.Count; ++i)
            {
                var unit = units[i];
                if (_CheckBulletFilter(sender, unit, bulletConfig))
                {
                    selectUnits.Add(unit);
                }
            }
        }

        private ViewBullet _EmitLockPosBullet(int targetCellIndex,
            GameUnit creator,
            DataBullet bulletConfig)
        {
            var bullet = new ViewBullet(bulletConfig, creator);
            bullet.LockPos(targetCellIndex);
            return bullet;
        }

        public void AddBuffs2Unit(GameUnit unit,
            GameUnit creator,
            DataBullet bulletConfig)
        {
            var sender = creator;
            if (!_CheckBulletFilter(sender, unit, bulletConfig))
            {
                return;
            }
            _CreateNoLineBullet(bulletConfig, creator, unit);

            if (bulletConfig.LightDuring > 0)
            {
                var cellIndex = unit.transData.cellIndex;
                BlackAreaManager.instance.LightUpCell(cellIndex, bulletConfig.LightDuring);
            }
        }

        public void AddBuffs2CellIndex(int targetCellIndex,
            GameUnit creator,
            DataBullet bulletConfig)
        {
            var areaId = bulletConfig.AreaId;
            if (areaId == -1)
            {
                // 做全局处理
                var units = GameUnitManager.instance.infightUnits.unitList;
                for (var i = 0; i < units.Count; ++i)
                {
                    var unit = units[i];
                    AddBuffs2Unit(unit, creator, bulletConfig);
                }
            }
            else
            {
                var cellIndexs = AreaManager.instance.GetCellIndexs(targetCellIndex, areaId);
                for (var i = 0; i < cellIndexs.Count; ++i)
                {
                    var cellIndex = cellIndexs[i];
                    // 根据filterType 和 cellIndex进行处理
                    var units = AreaManager.instance.GetUnitsByCellIndex(cellIndex);
                    for (var j = 0; j < units.Count; ++j)
                    {
                        var unit = units[j];
                        AddBuffs2Unit(unit, creator, bulletConfig);
                    }
                }
            }
            
            

        }

        private bool _CheckBulletFilter(GameUnit sender,
            GameUnit beHitter,
            DataBullet bulletConfig)
        {
            var onlyCharacterCheck = _CheckOnlyCharacter(beHitter, bulletConfig);
            if (!onlyCharacterCheck)
            {
                return false;
            }
            
            var troopCheck = _CheckTroopSide(sender, beHitter, bulletConfig.FilterType);
            if (!troopCheck)
            {
                return false;
            }
            
            var jobCheck = _CheckJobSide(beHitter, bulletConfig);
            if (!jobCheck)
            {
                return false;
            }
            
            var pretentCheck = _CheckPretentAvaliable(beHitter, bulletConfig);
            if (!pretentCheck)
            {
                return false;
            }
            
            var moraleCheck = _CheckMoraleState(beHitter, bulletConfig);
            if (!moraleCheck)
            {
                return false;
            }
            
            var buffGroupCheck = _CheckHasBuffGroup(beHitter, bulletConfig);
            if (!buffGroupCheck)
            {
                return false;
            }

            return true;
        }

        private bool _CheckPretentAvaliable(GameUnit beHitter, DataBullet bulletConfig)
        {
            if (bulletConfig.CanUseOnPretent)
            {
                return true;
            }
            if (beHitter.statusData.isPretend)
            {
                return false;
            }
            return true;
        }

        private bool _CheckMoraleState(GameUnit beHitter, DataBullet bulletConfig)
        {
            if (bulletConfig.MoraleFilter.Count == 0)
            {
                return true;
            }
            var behitCharacter = beHitter as Character;
            if (behitCharacter == null)
            {
                return false;
            }
            var moraleState = behitCharacter.runtimeData.moraleState;
            if (bulletConfig.MoraleFilter.Contains(moraleState))
            {
                return true;
            }
            
            return false;
        }

        private bool _CheckHasBuffGroup(GameUnit beHitter, DataBullet bulletConfig)
        {
            if (bulletConfig.ExistBuffGroupIdFilter.Count == 0)
            {
                return true;
            }

            var buffManager = beHitter.buffManager;
            if (buffManager == null)
            {
                return false;
            }
            
            for (var i = 0; i < bulletConfig.ExistBuffGroupIdFilter.Count; ++i)
            {
                var buffGroupId = bulletConfig.ExistBuffGroupIdFilter[i];
                if (buffManager.HasBuffGroup(buffGroupId))
                {
                    return true;
                }
            }
            
            return false;
        }

        private bool _CheckOnlyCharacter(GameUnit beHitter, DataBullet bulletConfig)
        {
            var require = bulletConfig.OnlyCharacter;
            if (!require)
            {
                return true;
            }
            var behitCharacter = beHitter as Character;
            if (behitCharacter == null)
            {
                return false;
            }
            return true;
        }

        private bool _CheckJobSide(GameUnit beHitter,
            DataBullet bulletConfig)
        {
            if (bulletConfig.JobFilters == null || bulletConfig.JobFilters.Count == 0)
            {
                return true;
            }
            // 只针对character
            var behitCharacter = beHitter as Character;
            if (behitCharacter == null)
            {
                return false;
            }
            var behitJob = behitCharacter.runtimeData.configData.job;
            if (bulletConfig.JobFilters.Contains(behitJob))
            {
                return true;
            }
            return false;
        }

        private bool _CheckTroopSide(GameUnit sender,
            GameUnit beHitter,
            ETargetType filterType)
        {
            switch (filterType)
            {
                case ETargetType.SelfSide:
                    if (sender.commonData.troopId == beHitter.commonData.troopId)
                    {
                        return true;
                    }
                    return false;
                case ETargetType.EnemySide:
                    if (sender.commonData.troopId != beHitter.commonData.troopId)
                    {
                        return true;
                    }
                    return false;
                case ETargetType.Self:
                    if (sender == beHitter)
                    {
                        return true;
                    }
                    return false;
                default:
                    DebugUtil.LogError("_CheckBulletFilter 暂未实现的filterType:{0}", filterType);
                    return false;
            }
        }

        private void _CreateNoLineBullet(DataBullet bulletConfig,
            GameUnit creator,
            GameUnit beHitter)
        {
            var buffIdList = bulletConfig.BuffList;
            for (var i = 0; i < buffIdList.Count; ++i)
            {
                var buffId = buffIdList[i];
                var addBuff = BuffManager.instance.CreateBuffById(creator, buffId);
                if (addBuff == null)
                {
                    continue;
                }
                BuffManager.instance.AddBuff(beHitter, addBuff);
            }
        }

        public DataBullet GetConfigById(int id)
        {
            return TableManager.Instance.Tables.BulletConfig.Get(id);
        }

    }
}