using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Config;
using Godot;

/// <summary>
/// 地牢管理器
/// </summary>
public partial class DungeonManager : Node2D
{
    /// <summary>
    /// 起始房间
    /// </summary>
    public RoomInfo StartRoomInfo => _dungeonGenerator?.StartRoomInfo;
    
    /// <summary>
    /// 当前玩家所在的房间
    /// </summary>
    public RoomInfo ActiveRoomInfo => Player.Current?.AffiliationArea?.RoomInfo;
    
    /// <summary>
    /// 当前玩家所在的区域
    /// </summary>
    public AffiliationArea ActiveAffiliationArea => Player.Current?.AffiliationArea;

    /// <summary>
    /// 是否在地牢里
    /// </summary>
    public bool IsInDungeon { get; private set; }

    private DungeonConfig _config;
    private DungeonTileMap _dungeonTileMap;
    private AutoTileConfig _autoTileConfig;
    private DungeonGenerator _dungeonGenerator;
    //房间内所有静态导航网格数据
    private List<NavigationPolygonData> _roomStaticNavigationList;
    private World _world;
    
    //用于检查房间敌人的计时器
    private float _checkEnemyTimer = 0;


    public DungeonManager()
    {
        //绑定事件
        EventManager.AddEventListener(EventEnum.OnPlayerFirstEnterRoom, OnPlayerFirstEnterRoom);
        EventManager.AddEventListener(EventEnum.OnPlayerEnterRoom, OnPlayerEnterRoom);
    }
    
    /// <summary>
    /// 加载地牢
    /// </summary>
    public void LoadDungeon(DungeonConfig config, Action finish = null)
    {
        _config = config;
        GameApplication.Instance.StartCoroutine(RunLoadDungeonCoroutine(finish));
    }

    /// <summary>
    /// 退出地牢
    /// </summary>
    public void ExitDungeon(Action finish = null)
    {
        IsInDungeon = false;
        GameApplication.Instance.StartCoroutine(RunExitDungeonCoroutine(finish));
    }

    public override void _Process(double delta)
    {
        if (IsInDungeon)
        {
            _checkEnemyTimer += (float)delta;
            if (_checkEnemyTimer >= 1)
            {
                _checkEnemyTimer %= 1;
                //检查房间内的敌人存活状况
                OnCheckEnemy();
            }
            
            //更新敌人视野
            UpdateEnemiesView();
            if (GameApplication.Instance.Debug)
            {
                QueueRedraw();
            }
        }
    }

    //执行加载地牢协程
    private IEnumerator RunLoadDungeonCoroutine(Action finish)
    {
        //打开 loading UI
        UiManager.Open_Loading();
        yield return 0;
        //创建世界场景
        _world = GameApplication.Instance.CreateNewWorld();
        yield return new WaitForFixedProcess(10);
        //生成地牢房间
        _dungeonGenerator = new DungeonGenerator(_config);
        _dungeonGenerator.Generate();
        yield return 0;
        
        //填充地牢
        _autoTileConfig = new AutoTileConfig();
        _dungeonTileMap = new DungeonTileMap(_world.TileRoot);
        _dungeonTileMap.AutoFillRoomTile(_autoTileConfig, _dungeonGenerator.StartRoomInfo, _dungeonGenerator.Random);
        yield return 0;
        
        //生成寻路网格， 这一步操作只生成过道的导航
        _dungeonTileMap.GenerateNavigationPolygon(GameConfig.AisleFloorMapLayer);
        yield return 0;
        //挂载过道导航区域
        _dungeonTileMap.MountNavigationPolygon(_world.TileRoot);
        yield return 0;
        //过道导航区域数据
        _roomStaticNavigationList = new List<NavigationPolygonData>();
        _roomStaticNavigationList.AddRange(_dungeonTileMap.GetPolygonData());
        yield return 0;
        //门导航区域数据
        _roomStaticNavigationList.AddRange(_dungeonTileMap.GetConnectDoorPolygonData());
        yield return new WaitForFixedProcess(10);
        //初始化所有房间
        _dungeonGenerator.EachRoom(InitRoom);
        yield return new WaitForFixedProcess(10);

        //播放bgm
        //SoundManager.PlayMusic(ResourcePath.resource_sound_bgm_Intro_ogg, -17f);

        //初始房间创建玩家标记
        var playerBirthMark = StartRoomInfo.RoomPreinstall.GetPlayerBirthMark();
        //创建玩家
        var player = ActivityObject.Create<Player>(ActivityObject.Ids.Id_role0001);
        if (playerBirthMark != null)
        {
            //player.Position = new Vector2(50, 50);
            player.Position = playerBirthMark.Position;
        }
        player.Name = "Player";
        player.PutDown(RoomLayerEnum.YSortLayer);
        Player.SetCurrentPlayer(player);
        
        //地牢加载即将完成
        _dungeonGenerator.EachRoom(info => info.OnReady());

        //玩家手上添加武器
        //player.PickUpWeapon(ActivityObject.Create<Weapon>(ActivityObject.Ids.Id_weapon0001));
        // var weapon = ActivityObject.Create<Weapon>(ActivityObject.Ids.Id_weapon0001);
        // weapon.PutDown(player.Position, RoomLayerEnum.NormalLayer);
        // var weapon2 = ActivityObject.Create<Weapon>(ActivityObject.Ids.Id_weapon0002);
        // weapon2.PutDown(player.Position, RoomLayerEnum.NormalLayer);
        // var weapon3 = ActivityObject.Create<Weapon>(ActivityObject.Ids.Id_weapon0003);
        // weapon3.PutDown(player.Position, RoomLayerEnum.NormalLayer);
        // var weapon4 = ActivityObject.Create<Weapon>(ActivityObject.Ids.Id_weapon0004);
        // weapon4.PutDown(player.Position, RoomLayerEnum.NormalLayer);

        GameApplication.Instance.Cursor.SetGuiMode(false);
        yield return 0;
        
        //打开游戏中的ui
        UiManager.Open_RoomUI();
        //派发进入地牢事件
        EventManager.EmitEvent(EventEnum.OnEnterDungeon);
        
        IsInDungeon = true;
        QueueRedraw();
        yield return 0;
        //关闭 loading UI
        UiManager.Destroy_Loading();
        if (finish != null)
        {
            finish();
        }
    }

    private IEnumerator RunExitDungeonCoroutine(Action finish)
    {
        //打开 loading UI
        UiManager.Open_Loading();
        yield return 0;
        _world.Pause = true;
        yield return 0;
        _dungeonGenerator.EachRoom(DisposeRoomInfo);
        yield return 0;
        _dungeonTileMap = null;
        _autoTileConfig = null;
        _dungeonGenerator = null;
        _roomStaticNavigationList.Clear();
        _roomStaticNavigationList = null;
        
        UiManager.Hide_RoomUI();
        yield return new WaitForFixedProcess(10);
        Player.SetCurrentPlayer(null);
        _world = null;
        GameApplication.Instance.DestroyWorld();
        yield return new WaitForFixedProcess(10);
        QueueRedraw();
        //鼠标还原
        GameApplication.Instance.Cursor.SetGuiMode(true);
        //派发退出地牢事件
        EventManager.EmitEvent(EventEnum.OnExitDungeon);
        yield return 0;
        //关闭 loading UI
        UiManager.Destroy_Loading();
        if (finish != null)
        {
            finish();
        }
    }
    
    // 初始化房间
    private void InitRoom(RoomInfo roomInfo)
    {
        //挂载房间导航区域
        MountNavFromRoomInfo(roomInfo);
        //创建门
        CreateDoor(roomInfo);
        //创建房间归属区域
        CreateRoomAffiliation(roomInfo);
        //创建静态精灵画布
        CreateRoomStaticSpriteCanvas(roomInfo);
    }
    
    //挂载房间导航区域
    private void MountNavFromRoomInfo(RoomInfo roomInfo)
    {
        var polygonArray = roomInfo.RoomSplit.TileInfo.NavigationList;
        var polygon = new NavigationPolygon();
        var offset = roomInfo.GetOffsetPosition();
        for (var i = 0; i < polygonArray.Count; i++)
        {
            var navigationPolygonData = polygonArray[i];
            var tempPosArray = navigationPolygonData.GetPoints();
            var polygonPointArray = new Vector2[tempPosArray.Length];
            //这里的位置需要加上房间位置
            for (var j = 0; j < tempPosArray.Length; j++)
            {
                polygonPointArray[j] = tempPosArray[j] + roomInfo.GetWorldPosition() - offset;
            }
            polygon.AddOutline(polygonPointArray);

            //存入汇总列表
            var polygonData = new NavigationPolygonData(navigationPolygonData.Type);
            polygonData.SetPoints(polygonPointArray);
            _roomStaticNavigationList.Add(polygonData);
        }
        polygon.MakePolygonsFromOutlines();
        var navigationPolygon = new NavigationRegion2D();
        navigationPolygon.Name = "NavigationRegion" + (GetChildCount() + 1);
        navigationPolygon.NavigationPolygon = polygon;
        _world.TileRoot.AddChild(navigationPolygon);
    }

    //创建门
    private void CreateDoor(RoomInfo roomInfo)
    {
        foreach (var doorInfo in roomInfo.Doors)
        {
            RoomDoor door;
            switch (doorInfo.Direction)
            {
                case DoorDirection.E:
                    door = ActivityObject.Create<RoomDoor>(ActivityObject.Ids.Id_other_door_e);
                    door.Position = (doorInfo.OriginPosition + new Vector2(0.5f, 2)) * GameConfig.TileCellSize;
                    door.ZIndex = GameConfig.TopMapLayer;
                    break;
                case DoorDirection.W:
                    door = ActivityObject.Create<RoomDoor>(ActivityObject.Ids.Id_other_door_w);
                    door.Position = (doorInfo.OriginPosition + new Vector2(-0.5f, 2)) * GameConfig.TileCellSize;
                    door.ZIndex = GameConfig.TopMapLayer;
                    break;
                case DoorDirection.S:
                    door = ActivityObject.Create<RoomDoor>(ActivityObject.Ids.Id_other_door_s);
                    door.Position = (doorInfo.OriginPosition + new Vector2(2f, 1.5f)) * GameConfig.TileCellSize;
                    door.ZIndex = GameConfig.TopMapLayer;
                    break;
                case DoorDirection.N:
                    door = ActivityObject.Create<RoomDoor>(ActivityObject.Ids.Id_other_door_n);
                    door.Position = (doorInfo.OriginPosition + new Vector2(2f, -0.5f)) * GameConfig.TileCellSize;
                    door.ZIndex = GameConfig.MiddleMapLayer;
                    break;
                default:
                    return;
            }
            doorInfo.Door = door;
            door.Init(doorInfo);
            door.PutDown(RoomLayerEnum.NormalLayer, false);
        }
    }

    //创建房间归属区域
    private void CreateRoomAffiliation(RoomInfo roomInfo)
    {
        var affiliation = new AffiliationArea();
        affiliation.Name = "AffiliationArea" + roomInfo.Id;
        affiliation.Init(roomInfo, new Rect2(
            roomInfo.GetWorldPosition() + new Vector2(GameConfig.TileCellSize, GameConfig.TileCellSize),
            (roomInfo.Size - new Vector2I(2, 2)) * GameConfig.TileCellSize));
        
        roomInfo.AffiliationArea = affiliation;
        _world.AffiliationAreaRoot.AddChild(affiliation);
    }

    //创建静态精灵画布
    private void CreateRoomStaticSpriteCanvas(RoomInfo roomInfo)
    {
        var worldPos = roomInfo.GetWorldPosition();
        var pos = new Vector2I((int)worldPos.X, (int)worldPos.Y);
        
        int minX = pos.X;
        int minY = pos.Y;
        int maxX = minX + roomInfo.GetWidth();
        int maxY = minY + roomInfo.GetHeight();

        //遍历每一个连接的门, 计算计算canvas覆盖范围
        foreach (var doorInfo in roomInfo.Doors)
        {
            var connectDoor = doorInfo.ConnectDoor;
            switch (connectDoor.Direction)
            {
                case DoorDirection.E:
                case DoorDirection.W:
                {
                    var (px1, py1) = connectDoor.GetWorldOriginPosition();
                    var py2 = py1 + 4 * GameConfig.TileCellSize;
                    if (px1 < minX)
                    {
                        minX = px1;
                    }
                    else if (px1 > maxX)
                    {
                        maxX = px1;
                    }

                    if (py1 < minY)
                    {
                        minY = py1;
                    }
                    else if (py1 > maxY)
                    {
                        maxY = py1;
                    }
                    
                    if (py2 < minY)
                    {
                        minY = py2;
                    }
                    else if (py2 > maxY)
                    {
                        maxY = py2;
                    }
                }
                    break;
                case DoorDirection.S:
                case DoorDirection.N:
                {
                    var (px1, py1) = connectDoor.GetWorldOriginPosition();
                    var px2 = px1 + 4 * GameConfig.TileCellSize;
                    if (px1 < minX)
                    {
                        minX = px1;
                    }
                    else if (px1 > maxX)
                    {
                        maxX = px1;
                    }

                    if (py1 < minY)
                    {
                        minY = py1;
                    }
                    else if (py1 > maxY)
                    {
                        maxY = py1;
                    }
                    
                    if (px2 < minX)
                    {
                        minX = px2;
                    }
                    else if (px2 > maxX)
                    {
                        maxX = px2;
                    }
                }
                    break;
            }
        }

        minX -= GameConfig.TileCellSize;
        minY -= GameConfig.TileCellSize;
        maxX += GameConfig.TileCellSize;
        maxY += GameConfig.TileCellSize;
        var staticSpriteCanvas = new RoomStaticImageCanvas(
            _world.StaticSpriteRoot,
            new Vector2I(minX, minY),
            maxX - minX, maxY - minY
        );
        staticSpriteCanvas.RoomOffset = new Vector2I(worldPos.X - minX, worldPos.Y - minY);
        roomInfo.StaticImageCanvas = staticSpriteCanvas;
    }

    /// <summary>
    /// 玩家第一次进入某个房间回调
    /// </summary>
    private void OnPlayerFirstEnterRoom(object o)
    {
        var room = (RoomInfo)o;
        room.OnFirstEnter();
        //如果关门了, 那么房间外的敌人就会丢失目标
        if (room.IsSeclusion)
        {
            var playerAffiliationArea = Player.Current.AffiliationArea;
            foreach (var enemy in _world.Enemy_InstanceList)
            {
                //不与玩家处于同一个房间
                if (enemy.AffiliationArea != playerAffiliationArea)
                {
                    if (enemy.StateController.CurrState != AiStateEnum.AiNormal)
                    {
                        enemy.StateController.ChangeState(AiStateEnum.AiNormal);
                    }
                }
            }
        }
    }

    /// <summary>
    /// 玩家进入某个房间回调
    /// </summary>
    private void OnPlayerEnterRoom(object o)
    {
    }
    
    /// <summary>
    /// 检测当前房间敌人是否已经消灭干净, 应当每秒执行一次
    /// </summary>
    private void OnCheckEnemy()
    {
        var activeRoom = ActiveRoomInfo;
        if (activeRoom != null)// && //activeRoom.IsSeclusion)
        {
            if (activeRoom.IsSeclusion) //房间处于关上状态
            {
                if (activeRoom.IsCurrWaveOver()) //所有标记执行完成
                {
                    //是否有存活的敌人
                    var flag = ActiveAffiliationArea.ExistIncludeItem(
                        activityObject => activityObject.CollisionWithMask(PhysicsLayer.Enemy)
                    );
                    //GD.Print("当前房间存活数量: " + count);
                    if (!flag)
                    {
                        activeRoom.OnClearRoom();
                    }
                }
            }
        }
    }

    /// <summary>
    /// 更新敌人视野
    /// </summary>
    private void UpdateEnemiesView()
    {
        _world.Enemy_IsFindTarget = false;
        _world.Enemy_FindTargetAffiliationSet.Clear();
        for (var i = 0; i < _world.Enemy_InstanceList.Count; i++)
        {
            var enemy = _world.Enemy_InstanceList[i];
            var state = enemy.StateController.CurrState;
            if (state == AiStateEnum.AiFollowUp || state == AiStateEnum.AiSurround) //目标在视野内
            {
                if (!_world.Enemy_IsFindTarget)
                {
                    _world.Enemy_IsFindTarget = true;
                    _world.Enemy_FindTargetPosition = Player.Current.GetCenterPosition();
                    _world.Enemy_FindTargetAffiliationSet.Add(Player.Current.AffiliationArea);
                }
                _world.Enemy_FindTargetAffiliationSet.Add(enemy.AffiliationArea);
            }
        }
    }

    private void DisposeRoomInfo(RoomInfo roomInfo)
    {
        roomInfo.Destroy();
    }
    
    public override void _Draw()
    {
        if (GameApplication.Instance.Debug)
        {
            if (_dungeonTileMap != null)
            {
                //绘制ai寻路区域
                Utils.DrawNavigationPolygon(this, _roomStaticNavigationList.ToArray());
            }
            //绘制房间区域
            // if (_dungeonGenerator != null)
            // {
            //     DrawRoomInfo(StartRoom);
            // }
            //绘制边缘线
            
        }
    }
    
    //绘制房间区域, debug 用
    private void DrawRoomInfo(RoomInfo roomInfo)
    {
        var cellSize = _world.TileRoot.CellQuadrantSize;
        var pos1 = (roomInfo.Position + roomInfo.Size / 2) * cellSize;
        
        //绘制下一个房间
        foreach (var nextRoom in roomInfo.Next)
        {
            var pos2 = (nextRoom.Position + nextRoom.Size / 2) * cellSize;
            DrawLine(pos1, pos2, Colors.Red);
            DrawRoomInfo(nextRoom);
        }

        DrawString(ResourceManager.DefaultFont16Px, pos1 - new Vector2I(0, 10), "Id: " + roomInfo.Id.ToString());
        DrawString(ResourceManager.DefaultFont16Px, pos1 + new Vector2I(0, 10), "Layer: " + roomInfo.Layer.ToString());

        //绘制门
        foreach (var roomDoor in roomInfo.Doors)
        {
            var originPos = roomDoor.OriginPosition * cellSize;
            switch (roomDoor.Direction)
            {
                case DoorDirection.E:
                    DrawLine(originPos, originPos + new Vector2(3, 0) * cellSize, Colors.Yellow);
                    DrawLine(originPos + new Vector2(0, 4) * cellSize, originPos + new Vector2(3, 4) * cellSize,
                        Colors.Yellow);
                    break;
                case DoorDirection.W:
                    DrawLine(originPos, originPos - new Vector2(3, 0) * cellSize, Colors.Yellow);
                    DrawLine(originPos + new Vector2(0, 4) * cellSize, originPos - new Vector2(3, -4) * cellSize,
                        Colors.Yellow);
                    break;
                case DoorDirection.S:
                    DrawLine(originPos, originPos + new Vector2(0, 3) * cellSize, Colors.Yellow);
                    DrawLine(originPos + new Vector2(4, 0) * cellSize, originPos + new Vector2(4, 3) * cellSize,
                        Colors.Yellow);
                    break;
                case DoorDirection.N:
                    DrawLine(originPos, originPos - new Vector2(0, 3) * cellSize, Colors.Yellow);
                    DrawLine(originPos + new Vector2(4, 0) * cellSize, originPos - new Vector2(-4, 3) * cellSize,
                        Colors.Yellow);
                    break;
            }
            
            //绘制房间区域
            DrawRect(new Rect2(roomInfo.Position * cellSize, roomInfo.Size * cellSize), Colors.Blue, false);

            if (roomDoor.HasCross && roomDoor.RoomInfo.Id < roomDoor.ConnectRoom.Id)
            {
                DrawRect(new Rect2(roomDoor.Cross * cellSize, new Vector2(cellSize * 4, cellSize * 4)), Colors.Yellow, false);
            }
        }
    }
    
    /// <summary>
    /// 将房间类型枚举转为字符串
    /// </summary>
    public static string DungeonRoomTypeToString(DungeonRoomType roomType)
    {
        switch (roomType)
        {
            case DungeonRoomType.Battle: return "battle";
            case DungeonRoomType.Inlet: return "inlet";
            case DungeonRoomType.Outlet: return "outlet";
            case DungeonRoomType.Boss: return "boss";
            case DungeonRoomType.Reward: return "reward";
            case DungeonRoomType.Shop: return "shop";
            case DungeonRoomType.Event: return "event";
        }

        return "battle";
    }
    
        
    /// <summary>
    /// 将房间类型枚举转为描述字符串
    /// </summary>
    public static string DungeonRoomTypeToDescribeString(DungeonRoomType roomType)
    {
        switch (roomType)
        {
            case DungeonRoomType.Battle: return "战斗房间";
            case DungeonRoomType.Inlet: return "起始房间";
            case DungeonRoomType.Outlet: return "结束房间";
            case DungeonRoomType.Boss: return "Boss房间";
            case DungeonRoomType.Reward: return "奖励房间";
            case DungeonRoomType.Shop: return "商店房间";
            case DungeonRoomType.Event: return "事件房间";
        }

        return "战斗房间";
    }
}