using System.Collections.Generic;
using Framework;
using Gameplay.Area;
using Gameplay.Common;
using Gameplay.Effect;
using Gameplay.Level;
using Gameplay.Performance;
using Gameplay.Utils;
using LTGame;
using UnityEngine;
namespace Gameplay.PlayerSkill.State
{
    public class PlayerSkillStateChoosePos : BasePlayerSkillState
    {

        private Camera _mainCamera;
        private Map _map;
        private int _layerMask;
        private readonly RaycastHit[] _raycastHits = new RaycastHit[2];

        private int _lastMouseCellIndex;

        private List<int> _cacheAreaCellIndexs = new List<int>();

        private AreaChecker _checker = new AreaChecker();

        private EffectPlayingData _effectData;

        private Color _areaColor;

        public PlayerSkillStateChoosePos(PlayerSkillManager owner) : base(owner, EPlayerSkillState.ChoosePos)
        {

        }

        protected override void _OnEnter(NBaseState exitState,
            object param)
        {
            base._OnEnter(exitState, param);

            _mainCamera = Camera.main;
            _map = LevelManager.Instance.CurrentLevel.Map;
            _layerMask = LayerMask.GetMask("Ground");

            _lastMouseCellIndex = -1;
            _cacheAreaCellIndexs.Clear();
            _checker.InitFromPlayerSkill(owner.readySkillConfig, owner.playerUnit.commonData.troopId);

            _map.ShowInfo(Map.InfoMask.ShowCells, true);

            if (owner.readySkillConfig.ShowEffectId > 0)
            {
                _effectData = EffectManager.instance.PlayEffectById(owner.readySkillConfig.ShowEffectId, Vector3.zero);
                _effectData.autoDestroy = false;
            }

            _areaColor = ColorEx.FromStr(owner.readySkillConfig.ShowAreaColor);
            

            EventManager.Instance.Register<EDReleasePlayerSkill>(EventManager.EventName.INFIGHT_PLAYER_SKILL_RELEASE, _OnRecvRelease);
        }

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

            // 实时获取鼠标指向位置
            var mouseCellIndex = _GetCurrentMouseCellIndex();

            if (_lastMouseCellIndex != mouseCellIndex)
            {
                _lastMouseCellIndex = mouseCellIndex;
                if (_cacheAreaCellIndexs.Count != 0)
                {
                    // 还原地块颜色
                    _map.SetBlocksColor(_cacheAreaCellIndexs, false, Color.clear);
                }

                _cacheAreaCellIndexs.Clear();
                AreaManager.instance.GetCellIndexs(_lastMouseCellIndex, owner.readySkillConfig.ShowAreaId, _cacheAreaCellIndexs);

                if (_effectData != null)
                {
                    _effectData.transform.position = AreaManager.instance.GetCellPosByIndex(_lastMouseCellIndex);
                }

                _map.SetBlocksColor(_cacheAreaCellIndexs, true, _areaColor);
            }

            _FakeInput();
        }

        protected override void _OnExit(NBaseState exitState,
            object param)
        {
            base._OnExit(exitState, param);

            if (_cacheAreaCellIndexs.Count != 0)
            {
                // 还原地块颜色
                _map.SetBlocksColor(_cacheAreaCellIndexs, false, Color.clear);
            }
            _map.ShowInfo(Map.InfoMask.ShowCells, false);

            if (_effectData != null)
            {
                _effectData.Destroy();
                _effectData = null;
            }

            EventManager.Instance.Unregister<EDReleasePlayerSkill>(EventManager.EventName.INFIGHT_PLAYER_SKILL_RELEASE, _OnRecvRelease);
        }

        private void _FakeInput()
        {
            // TODO: 临时逻辑, 用于测试
            if (Input.GetKeyDown(KeyCode.Q))
            {
                var releaseData = new EDReleasePlayerSkill();
                releaseData.isCancel = true;
                EventManager.Instance.Send(EventManager.EventName.INFIGHT_PLAYER_SKILL_RELEASE, releaseData);
            }
        }


        private void _OnRecvRelease(EDReleasePlayerSkill releaseData)
        {
            DebugUtil.Log("接收到释放技能消息");
            isFinished = true;
            var posCanRelease = _checker.CheckAvailable(_lastMouseCellIndex);
            if (!posCanRelease)
            {
                UITipsManager.ShowTips(" ");
                DebugUtil.Log("当前位置不可释放技能");
                nextState = EPlayerSkillState.Idle;
                return;
            }
            if (releaseData.isCancel)
            {
                DebugUtil.Log("玩家取消释放技能");
                nextState = EPlayerSkillState.Idle;
                return;
            }

            DebugUtil.Log("玩家释放技能");
            owner.selectedCellIndex = _lastMouseCellIndex;
            nextState = EPlayerSkillState.Release;
        }

        private int _GetCurrentMouseCellIndex()
        {
            var mousePos = Input.mousePosition;

            var ray = _mainCamera.ScreenPointToRay(mousePos * PerformanceManager.instance.screenScale);
            var raycast = Physics.RaycastNonAlloc(ray, _raycastHits, 1000, _layerMask);
            if (raycast <= 0) return -1;
            var firstHit = _raycastHits[0];
            var hitPoint = firstHit.point;
            if (!_map.WorldPosition2TGSCellIndex(hitPoint, out var cellIndex)) return -1;
            return cellIndex;
        }

    }
}