using System;
using System.Collections.Generic;
using AOT.PostProcess.BlackArea;
using Framework;
using Gameplay.Common;
using Gameplay.Fight.Capture;
using Gameplay.Level;
using Gameplay.Unit;
using Gameplay.Unit.Data;
using Gameplay.Vehicle.Impl;
using UnityEngine;
using Object = UnityEngine.Object;

namespace Gameplay.Area.Ready
{
    public class ReadyAreaManager
    {

        public Map _map;

        private EReadyAreaStatus _areaStatus;

        private List<int> _mapSavedReadyCellIndexs;
        public List<int> mapSavedReadyCellIndexs => _mapSavedReadyCellIndexs;

        public bool isShow { get; private set; }

        public NormalVehicle followVehicle { get; set; }

        public bool isVehicleBuffActive
        {
            get;
            set;
        }

        private List<int> _finalReadyCellIndexs;

        private Dictionary<int, ReadyAreaPoint> _readyAreaDict;
        private Stack<ReadyAreaPoint> _pointsStack;
        public GameObject rootObj;

        private bool _needUpdate;

        public ReadyAreaManager(Map map)
        {
            rootObj = new GameObject("[ReadyArea]");
            _map = map;
            isShow = false;
            _readyAreaDict = new Dictionary<int, ReadyAreaPoint>();
            _pointsStack = new Stack<ReadyAreaPoint>();
            _finalReadyCellIndexs = new List<int>();
        }

        public void Init()
        {
            _InitReadyAreaFromLevel();
            EventManager.Instance.Register<CaptureInst>(EventManager.EventName.INFIGHT_CAPTURE_FINSIHED, _OnCaptureArea);
            EventManager.Instance.Register<GameUnit>(EventManager.EventName.INFIGHT_UNIT_CELLINDEX_CHANGE, _OnCellIndexChanged);
        }

        public void Dispose()
        {
            EventManager.Instance.Unregister<CaptureInst>(EventManager.EventName.INFIGHT_CAPTURE_FINSIHED, _OnCaptureArea);
            EventManager.Instance.Unregister<GameUnit>(EventManager.EventName.INFIGHT_UNIT_CELLINDEX_CHANGE, _OnCellIndexChanged);
            
            _HideAll();
            
            _pointsStack.Clear();
            
            if (rootObj != null)
            {
                Object.Destroy(rootObj);
                rootObj = null;
            }
        }

        private void _OnCellIndexChanged(GameUnit unit)
        {
            _needUpdate = true;
        }

        private void _InitReadyAreaFromLevel()
        {
            _mapSavedReadyCellIndexs = new List<int>();
            var levelData = LevelManager.Instance.CurrentLevel.GetLevelData();
            var areaId = levelData.preparingRegionId;
            var area = _map.MapData.GetRegion(areaId);
            if (area == null)
            {
                DebugUtil.LogError("读取准备区域失败");
                return;
            }
            var allPoints = area.positions;
            foreach (var cellIndex in allPoints)
            {
                if (_mapSavedReadyCellIndexs.Contains(cellIndex))
                {
                    continue;
                }
                _mapSavedReadyCellIndexs.Add(cellIndex);
            }
        }
        
        public void ClipMoveUnits()
        {
            var allUnitsCellIndex = new List<int>();
            var allUnits = GameUnitManager.instance.totalUnits.unitList;
            for (int i = 0; i < allUnits.Count; i++)
            {
                var unit = allUnits[i];
                if (unit.gameunitType == EGameUnitType.Character
                    || unit.gameunitType == EGameUnitType.Vehicle
                    || unit.gameunitType == EGameUnitType.Building)
                {
                    allUnitsCellIndex.Add(unit.transData.cellIndex);
                }
            }
            
            for (int i = 0; i < _mapSavedReadyCellIndexs.Count; i++)
            {
                var cellIndex = _mapSavedReadyCellIndexs[i];
                var hasMoveUnit = allUnitsCellIndex.Contains(cellIndex);
                if (hasMoveUnit)
                {
                    _mapSavedReadyCellIndexs.RemoveAt(i--);
                }
            }
        }
        
        private void _OnCaptureArea(CaptureInst inst)
        {
            if (_mapSavedReadyCellIndexs.Contains(inst.cellIndex))
            {
                return;
            }
            _mapSavedReadyCellIndexs.Add(inst.cellIndex);
            _needUpdate = true;
        }

        private ReadyAreaPoint _GetOrCreate()
        {
            if (_pointsStack.Count > 0)
            {
                return _pointsStack.Pop();
            }
            return new ReadyAreaPoint(PathDefine.ReadyArea.READY_AREA_POINT);
        }

        private void _SetPointsShow(List<int> cellIndexs)
        {
            for (int i = 0; i < cellIndexs.Count; i++)
            {
                var cellIndex = cellIndexs[i];
                _SetPointShow(cellIndex);
            }
        }

        private void _SetPointsHide(List<int> cellIndexs)
        {
            for (int i = 0; i < cellIndexs.Count; i++)
            {
                var cellIndex = cellIndexs[i];
                _SetPointHide(cellIndex);
            }
        }

        private void _HideAll()
        {
            foreach (var kv in _readyAreaDict)
            {
                var point = kv.Value;
                point.Hide();
                _pointsStack.Push(point);
            }
            _readyAreaDict.Clear();
        }

        private void _SetPointShow(int cellIndex)
        {
            if (_readyAreaDict.ContainsKey(cellIndex))
            {
                // 已经在显示了
                return;
            }
            var newPoint = _GetOrCreate();
            newPoint.SetIndex(cellIndex);
            _readyAreaDict.Add(cellIndex, newPoint);
        }

        private void _SetPointHide(int cellIndex)
        {
            if (_readyAreaDict.TryGetValue(cellIndex, out var point))
            {
                point.Hide();
                _readyAreaDict.Remove(cellIndex);
                _pointsStack.Push(point);
            }
        }

        private void _GetPosFromVehicle()
        {
            var vehicleCellIndex = followVehicle.transData.cellIndex;
            var totalAround = AreaManager.instance.GetCellIndexsAround(vehicleCellIndex,
                followVehicle.aroundReadyRange, false);
            _finalReadyCellIndexs.AddRange(totalAround);
        }

        private void _GetPosFromMapSavedReady()
        {
            _finalReadyCellIndexs.AddRange(_mapSavedReadyCellIndexs);
        }

        private bool _CheckCanUp(int cellIndex)
        {
            if (cellIndex == -1) return false;
            if (_map.GetRuntimeBlockProperty(cellIndex, out var runtimeBlockProperty))
            {
                if (!runtimeBlockProperty.selectable)
                {
                    return false;
                }
                if (runtimeBlockProperty.banAttack)
                {
                    return false;
                }
                var hasMoveUnit = AreaManager.instance.CheckContainsMoveUnit(cellIndex);
                if (hasMoveUnit)
                {
                    return false;
                }
                return true;
            }
            return false;
        }

        private void _RemoveNotMatch()
        {
            for (int i = 0; i < _finalReadyCellIndexs.Count; i++)
            {
                var newIndex = _finalReadyCellIndexs[i];
                if (!_CheckCanUp(newIndex))
                {
                    _finalReadyCellIndexs.RemoveAt(i--);
                }
            }
        }

        public void LogicUpdate(float dt)
        {
            if (!isShow) return;

            if (_needUpdate)
            {
                _UpdateArea();
                _needUpdate = false;
            }

            _AutoLightUpReadyArea();
        }

        private void _LightUpList(List<int> cellList)
        {
            for (int i = 0; i < cellList.Count; i++)
            {
                var cellIndex = cellList[i];
                BlackAreaManager.instance.LightUpCell(cellIndex, CodeDefine.Fight.LIGHT_UP_TIME);
            }
        }

        private void _AutoLightUpReadyArea()
        {
            _LightUpList(_finalReadyCellIndexs);
        }

        public bool CheckIsInReadyArea(int cellIndex)
        {
            return _finalReadyCellIndexs.Contains(cellIndex);
        }

        public void ShowReadyArea(EReadyAreaStatus showStatus = EReadyAreaStatus.FromMap,
            GameUnit unit = null)
        {
            if (isShow)
            {
                if (_areaStatus == showStatus)
                {
                    // 重复的调用
                    _needUpdate = true;
                }
                else
                {
                    // 需要切换显示状态
                    HideReadyArea();
                }
            }
            isShow = true;
            _areaStatus = showStatus;
            _SetCurrentVehicle(unit);
            _UpdateArea();
            _SetPointsShow(_finalReadyCellIndexs);
        }

        private void _UpdateArea()
        {
            _finalReadyCellIndexs.Clear();
            if (!LevelManager.Instance.CurrentLevel.isInBattle)
            {
                // 不在战斗中，直接显示地图上的准备区域
                _GetPosFromMapSavedReady();
                return;
            }

            switch (_areaStatus)
            {
                case EReadyAreaStatus.Both:
                    _GetPosFromVehicle();
                    _GetPosFromMapSavedReady();
                    break;
                case EReadyAreaStatus.AroundVehicle:
                    _GetPosFromVehicle();
                    break;
                case EReadyAreaStatus.FromMap:
                    _GetPosFromMapSavedReady();
                    if (isVehicleBuffActive)
                    {
                        _GetPosFromVehicle();
                    }
                    break;
            }

            _RemoveNotMatch();
        }


        private void _SetCurrentVehicle(GameUnit downUnit)
        {
            if (downUnit == null) return;
            if (downUnit.gameunitType != EGameUnitType.Character)
            {
                throw new Exception("不是角色1");
            }
            var character = downUnit as Character.Character;
            if (character == null)
            {
                throw new Exception("不是角色2");
            }
            followVehicle = character.runtimeData.belongVehicle;
        }

        public void HideReadyArea()
        {
            if (!isShow)
            {
                return;
            }
            isShow = false;
            _HideAll();
        }

    }
}