using System.Collections.Generic;
using Thousandto.Cfg.Data;
using Thousandto.Code.Center;
using Thousandto.Code.Global;
using Thousandto.Core.Asset;
using UnityEngine;

namespace Thousandto.Code.Logic
{
    public class FeiJianBuff : Buff
    {
        //飞剑实例列表
        private List<FeiJianInst> _vfxList = new List<FeiJianInst>();
        //飞剑出生倒计时
        private float _bornTimer = 0f;
        //查找目标辅助列表
        private List<Monster> _helpList = new List<Monster>();
        //闪烁曲线
        private AnimationCurve _curve = null;
        //使用的配置
        private DeclareCloneDaneng _useCfg = null;

        protected override void OnAddBuffSpecial(Character inOwner = null)
        {
            base.OnAddBuffSpecial(inOwner);
            _bornTimer = 0.5f;
            var lpLv = GameCenter.GameSceneSystem.GetLocalPlayerLevel();

            DeclareCloneDaneng.Foreach((cfg) =>
            {
                if (lpLv >= cfg.MinLv && lpLv <= cfg.MaxLv)
                {
                    _useCfg = cfg;
                    return false;
                }
                return true;
            });
        }

        protected override void OnDeleteBuffSpecial(Character owner)
        {
            base.OnDeleteBuffSpecial(owner);
            if (!owner.IsLocalPlayer())
                return;
            for (int i = _vfxList.Count - 1; i >= 0; --i)
            {
                _vfxList[i].Destroy();
            }
            _vfxList.Clear();

            var monsters = GameCenter.GameSceneSystem.FindEntityAll<Monster>();
            if(monsters != null && monsters.Count > 0)
            {
                for(int i = 0; i < monsters.Count; ++i)
                {
                    monsters[i].LockCurHP = false;
                }
            }
        }

        protected override void OnUpdate()
        {
            base.OnUpdate();

            var owner = GameCenter.GameSceneSystem.FindEntity<Character>(OwenId);
            if(owner == null || !owner.IsLocalPlayer())
            {
                return;
            }
            _bornTimer -= Time.deltaTime;
            if (_bornTimer <= 0f)
            {
                _bornTimer = 0.25f;
                for (int i = 0; i < 5; ++i)
                {
                    var monster = FindMonster();
                    if(monster != null)
                    {
                        _vfxList.Add(new FeiJianInst(999, owner, this, monster, _useCfg));
                    }
                }
            }

            for (int i = _vfxList.Count - 1; i >= 0; --i)
            {
                if (_vfxList[i].Update(Time.deltaTime))
                {
                    _vfxList.RemoveAt(i);
                }
            }
        }

        private void AtkMonster(Monster m)
        {
            if (m == null || m.IsDead() || m.CurHP <= 0 || _useCfg == null)
            {
                return;
            }
            if (_curve == null)
            {
                _curve = new AnimationCurve();
                _curve.AddKey(0, 0);
                _curve.AddKey(0, 1);
            }
            
            m.ShowHUD();
            GameCenter.PushFixEvent(LogicEventDefine.EID_EVENT_HUD_SHOWMONSTER_HP, m);
            //播放闪烁效果
            m.Blinker.Start(0.2f, 1f, Color.white, _curve, m.Skin);
            long damageHP = GameCenter.GameSceneSystem.GetLocalPlayerFightPower();

            m.LockCurHP = false;
            if (m.PropMoudle.CurHP > (ulong)damageHP)
            {
                m.PropMoudle.CurHP = m.PropMoudle.CurHP - (ulong)damageHP;
            }
            else
            {
                m.PropMoudle.CurHP = 0;
            }
            m.LockCurHP = true;

            var damage = new MSG_Fight.HitEffectInfo();
            damage.effect = 0;
            damage.targetID = m.ID;
            damage.isDead = false;
            damage.damageHp = damageHP;
            damage.damageWaken = 0;
            GameCenter.PushFixEvent(LogicEventDefine.EID_EVENT_HUD_POPUP_DAMAGE, damage, GameCenter.GameSceneSystem.GetLocalPlayer());

            if (m.PropMoudle.CurHP <= 0)
            {
                MSG_copyMap.ReqKillMonster msg = new MSG_copyMap.ReqKillMonster();
                msg.monsterId = (long)m.ID;
                msg.Send();
            }
        }

        private Monster FindMonster()
        {
            _helpList.Clear();
            var lp = GameCenter.GameSceneSystem.GetLocalPlayer();
            var monsterList = GameCenter.GameSceneSystem.FindEntityAll<Monster>();
            for (int i = 0; i < monsterList.Count; ++i)
            {
                if (monsterList[i].CurHP > 0 && CombatUtil.CanAttackTarget(lp, monsterList[i], false) && lp.GetSqrDistance2d(monsterList[i].Position2d) <= 225f)
                {
                    _helpList.Add(monsterList[i]);
                }
            }
            if (_helpList.Count > 0)
            {
                return _helpList[Random.Range(0, _helpList.Count)];
            }
            return null;
        }

        #region//私有类
        private class FeiJianInst
        {
            public FGameObjectVFX Vfx = null;
            //计时器
            private float _timer = 0f;
            private float _maxTime = 2f;

            private Vector3 _ownerPos = Vector3.zero;
            private Vector3 _oriDir = Vector3.zero;
            private Vector3 _tarDir = Vector3.zero;
            private float _tarRadius = 0f;
            private float _timeSpeed = 1f;
            //上一帧的位置，用于计算方向
            private Vector3 _frontPos = Vector3.zero;
            //目标怪物
            private Monster _target = null;
            //父buff
            private FeiJianBuff _parent;

            public FeiJianInst(int vfxId, Character owner, FeiJianBuff parrnt, Monster target, DeclareCloneDaneng useCfg)
            {
                _parent = parrnt;
                _target = target;
                _oriDir = new Vector3(Random.Range(-1f, 1f), 0f, Random.Range(-1f, 1f)).normalized;
                if (_target != null)
                {
                    _tarDir = (_target.Position - owner.Position).normalized;
                    _tarRadius = Vector3.Distance(_target.Position, owner.Position);
                    if(!_target.LockCurHP)
                    {
                        switch (_target.PropMoudle.Cfg.MonsterType)
                        {
                            case 1:
                                _target.PropMoudle.CurHP = (ulong)useCfg.MonsterMaxHp1;
                                _target.PropMoudle.SetBattleProp(AllBattleProp.MaxHP, useCfg.MonsterMaxHp1);
                                break;
                            case 2:
                                _target.PropMoudle.CurHP = (ulong)useCfg.MonsterMaxHp2;
                                _target.PropMoudle.SetBattleProp(AllBattleProp.MaxHP, useCfg.MonsterMaxHp2);
                                break;
                            default:
                                _target.PropMoudle.CurHP = (ulong)useCfg.MonsterMaxHp3;
                                _target.PropMoudle.SetBattleProp(AllBattleProp.MaxHP, useCfg.MonsterMaxHp3);
                                break;
                        }
                    }
                    _target.LockCurHP = true;
                }
                else
                {
                    _tarDir = owner.GetFacingDirection();
                    _tarRadius = 10f;
                }
                _frontPos = owner.Position + Vector3.up * 1f;
                _ownerPos = _frontPos;

                var lod = 0;
                if (!owner.IsLocalPlayer())
                {//只针对其他玩家
                 //这里因为GameSettingKeyCode.OtherPlayerSkillVfxLevel的值是:0屏蔽全部,1弱,2中,3强.
                 //而lod是0最强,往下最弱.
                    lod = FGameObjectVFXRoot.CN_VFX_LEVEL_MAX - GameCenter.GameSetting[GameSettingKeyCode.OtherPlayerSkillVfxLevel]; ;
                }
                _timeSpeed = 1f;
                Vfx = new FGameObjectVFX(ModelTypeCode.SkillVFX, 606, true, false, lod);
                Vfx.SetLayer(owner.Layer);
                Vfx.SetPosition(_frontPos);
                Vfx.Play();
                Vfx.SetForward(_oriDir);
                _timer = 0f;
                Update(0f);
            }

            public void Destroy()
            {
                Vfx.Destroy();
                Vfx = null;
            }

            public bool Update(float dt)
            {
                if (Vfx == null)
                    return true;
                _timeSpeed += dt * 1f;
                _timer += dt * _timeSpeed;
                if (_timer >= _maxTime)
                {
                    _parent.AtkMonster(_target);
                    Vfx.Destroy();
                    Vfx = null;
                    return true;
                }
                else
                {
                    var lerpValue = _timer / _maxTime;
                    var newPos = _ownerPos + Mathf.Lerp(0f, _tarRadius, lerpValue) * Vector3.Slerp(_oriDir, _tarDir, lerpValue).normalized;
                    if (newPos != _frontPos)
                    {
                        Vfx.SetForward(newPos - _frontPos);
                        _frontPos = newPos;
                    }
                    Vfx.SetPosition(newPos);
                }
                return false;
            }
        }
        #endregion
    }
}