using Framework;
using Gameplay;
using NPOI.SS.Formula.Functions;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Cysharp.Threading.Tasks;
using TGS;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UIElements;
using static UnityEditor.Searcher.SearcherWindow.Alignment;


public class EditorMap
{
    private static EditorMap _instance;
    public static EditorMap Instance
    {
        get
        {

            if (_instance == null)
            {
                _instance = new EditorMap();
            }

            return _instance;
        }
    }
    
    public delegate void OnMapChanged();
    public OnMapChanged onMapChanged;
    public Map Current
    {
        get => _map;
        set
        {
            _map = value;
            onMapChanged?.Invoke();
        }
    }
    private Map _map;
}
public class MapEditorUtils
{
    public const float UPP = 100;

    public static Dictionary<GameObject, List<int>> mapObjectOccupyCells = new Dictionary<GameObject, List<int>>();
    // public static Map CreateNewMap(int id, string name, int column, int row,  string backgroundPath, MapData.EnvironmentType environmentType)
    // {
    //     OpenMapScene();
    //     
    //     var asset = AssetDatabase.LoadAssetAtPath<GameObject>(MapEditorConstant.MapTemplatePrefab);
    //     var root = GameObject.Instantiate(asset);
    //     var tgs = root.GetComponentInChildren<TerrainGridSystem>();
    //     
    //     tgs.columnCount = column;
    //     tgs.rowCount = row;
    //     
    //     MapData mapData = new MapData(id, name, column, row, environmentType);
    //     var map = Map.Create(root, mapData);
    //     map.SetGroundTexture(AssetDatabase.LoadAssetAtPath<Texture2D>(backgroundPath));
    //     map.ShowInfo((int)Map.InfoMask.ShowAll);
    //     ResetCamera();
    //     return map;
    // }

    public static void OpenMapScene()
    {
        //GameSceneManager.Instance.ChangeScene(GameSceneManager.EnumScene.GameLevel);
        var scene = SceneManager.GetActiveScene();
        if (scene.path == MapEditorConstant.MapEditorScene)
        {
            return;
        }
        else
        {
            EditorSceneManager.OpenScene(MapEditorConstant.MapEditorScene);
        }
    }

    // public static void SaveEditorMap()
    // {
    //     var map = EditorMap.Instance.Current;
    //     if (map != null)
    //     {
    //         var prefabFilePath = string.Format(Constants.MAP_ASSET_FORMAT_PATH, map.GetMapFileName());
    //
    //         // PrefabUtility.SaveAsPrefabAssetAndConnect(map.GameObject,
    //         //     prefabFilePath, InteractionMode.UserAction);
    //         
    //         var configFilePath = string.Format(Constants.MAP_CONFIG_FORMAT_PATH, map.GetMapFileName());
    //         // if (File.Exists(configFilePath))
    //         // {
    //         //     VersionControlSystem.Checkout(configFilePath);
    //         // }
    //         Framework.JsonHelper.SaveJson(configFilePath, map.MapData);
    //
    //         if (File.Exists(prefabFilePath) && File.Exists(configFilePath))
    //         {
    //             CustomPopUpWindow.PopUp($"Save Successfully:\n {prefabFilePath} \n {configFilePath} \n");
    //         }
    //     }
    // }

    // public static Map LoadMap(TerrainGridSystem terrainGridSystem,MapData mapData)
    // {
    //     //OpenMapScene();
    //     //ResetCamera();
    //     //MapUtils.UnLoadMap(EditorMap.Instance.Current);
    //     var map =  MapUtils.LoadMap(terrainGridSystem,mapData);
    //     if (map != null)
    //     {
    //         map.ShowInfo((int)Map.InfoMask.ShowAll);
    //         return map;
    //     }
    //     return null;
    // }

    public static void UnLoadMap(EditorMap editorMap)
    {
        MapUtils.UnLoadMap(editorMap.Current);
        editorMap.Current = null;
    }

    // public static void ResetCamera()
    // {
    //     if (Camera.main == null)
    //     {
    //         var camera = new GameObject("Main Camera").AddComponent<Camera>();
    //         camera.tag = "MainCamera";
    //     }
    //
    //     var mainCamera = Camera.main;
    //     var cameraController = mainCamera.gameObject.GetComponent<CameraController>();
    //     if (!cameraController)
    //     {
    //         cameraController = mainCamera.gameObject.AddComponent<CameraController>();
    //     }
    //
    //     cameraController.Map = EditorMap.Instance.Current != null ? EditorMap.Instance.Current : null;
    //     mainCamera.orthographic = true;
    //     mainCamera.orthographicSize = cameraController.CameraMaxSize;
    //     mainCamera.gameObject.transform.forward = Vector3.down;
    //     mainCamera.gameObject.transform.up = Vector3.forward;
    //     if (Application.isPlaying)
    //     {
    //         if (mainCamera != null)
    //         {
    //             GameObject.DontDestroyOnLoad(mainCamera.gameObject);
    //         }
    //     }
    // }

    /// <summary>
    /// 物件自动吸附格子
    /// </summary>
    /// <param name="mapObject"></param>
    public static void ObjectAutoAdsorptionCell(GameObject mapObject)
    {
        var map = EditorMap.Instance.Current;

        MeshFilter meshFilter = mapObject.GetComponentInChildren<MeshFilter>();

        if (meshFilter != null)
        {
            var bounds = CalculateBounds(meshFilter.sharedMesh);
            
            // Debug.Log($"包围盒大小：{bounds.size}，包围盒中心位置：{bounds.center},最大：{bounds.max},最小：{bounds.min}");

            Vector3 centerWorldPos = mapObject.transform.TransformPoint(new Vector3(bounds.center.x, 0f, bounds.center.z));

            Cell cell = map.TerrainGridSystem.CellGetAtPosition(centerWorldPos, true);

            if (cell != null)
            {
                var nearestPoint = FindNearestPoint(cell.index, centerWorldPos);

                mapObject.transform.position = nearestPoint;

                Vector3 centerWorldPos2 = mapObject.transform.TransformPoint(new Vector3(bounds.center.x, 0f, bounds.center.z));

                Vector3 moveVector = mapObject.transform.position - centerWorldPos2;

                mapObject.transform.position += moveVector;

                CalculateFloorArea(mapObject ,bounds);
            }
        }
    }

    
    /// <summary>
    /// 刷地图建筑物占地地块，默认刷为0号地块
    /// </summary>
    public static void CalculateFloorArea(GameObject mapObject, Bounds bounds)
    {
        Dictionary<int, TerrainTypeProperty> terrainTypeConfig = TerrainTypeConfig.DicTerrainTypePropertie;

        var map = EditorMap.Instance.Current;

        if (mapObjectOccupyCells.TryGetValue(mapObject, out var cells))
        {
            foreach (var cell in cells) 
            {
                map.TerrainGridSystem.CellSetColor(cell, Color.clear);
            }
            cells.Clear();
        }
        else
        {
            
            cells = new List<int>();
            mapObjectOccupyCells.Add(mapObject, cells);
        }

        var lowerLeft = mapObject.transform.TransformPoint(new Vector3(bounds.min.x, 0f, bounds.min.y));

        var topRight = mapObject.transform.TransformPoint(new Vector3(bounds.max.x, 0f, bounds.max.y));
        
        var lowerRight = mapObject.transform.TransformPoint(new Vector3(bounds.max.x, 0f, bounds.min.y));
        
        var topLeft = mapObject.transform.TransformPoint(new Vector3(bounds.min.x, 0f, bounds.max.y));

        var minPos = new Vector3(Mathf.Min(lowerLeft.x, topRight.x, lowerRight.x, topLeft.x), 0f,
            Mathf.Min(lowerLeft.z, topRight.z, lowerRight.z, topLeft.z));

        var maxPos = new Vector3(Mathf.Max(lowerLeft.x, topRight.x, lowerRight.x, topLeft.x), 0f,
            Mathf.Max(lowerLeft.z, topRight.z, lowerRight.z, topLeft.z));

        if (map.TerrainGridSystem.CellGetAtPosition(minPos, true) != null &&
            map.TerrainGridSystem.CellGetAtPosition(maxPos, true) != null)
        {
            var minCellPos = map.TGSCellIndex2BlockPosition(map.TerrainGridSystem.CellGetAtPosition(minPos, true).index);

            var maxCellPos = map.TGSCellIndex2BlockPosition(map.TerrainGridSystem.CellGetAtPosition(maxPos, true).index);

            var minX = Mathf.Min(minCellPos.x, maxCellPos.x);
            var maxX = Mathf.Max(minCellPos.x, maxCellPos.x);
            var minY = Mathf.Min(minCellPos.y, maxCellPos.y);
            var maxY = Mathf.Max(minCellPos.y, maxCellPos.y);
        
            //Debug.Log($"最大y：{maxY},最小y：{minY},最大x：{maxX},最小x：{minX}");

            for (int i = minX; i <= maxX; ++i)
            {
                for(int j = minY; j <= maxY; ++j)
                {
                
                    var cellIndex = map.BlockPosition2TGSCellIndex(new(i, j));

                    cells.Add(cellIndex);

                    map.TerrainGridSystem.CellSetColor(cellIndex, terrainTypeConfig[0].Color);
                
                }
            }
        }
        
    }
    
    
    

    /// <summary>
    /// 计算3m以下的包围盒大小
    /// </summary>
    /// <param name="mesh"></param>
    /// <returns></returns>
    public static Bounds CalculateBounds(Mesh mesh)
    {
        float limitHeight = 3f;

        if (mesh != null)
        {
            Vector3[] vertices = mesh.vertices;

            List<Vector3> limitVertices = vertices.Where(vertex => vertex.z <= limitHeight).ToList();

            Bounds bounds = new Bounds(new Vector3(limitVertices[0].x, limitVertices[0].y, 0f), Vector3.zero);

            foreach (Vector3 vertex in limitVertices)
            {
                bounds.Encapsulate(new Vector3(vertex.x, vertex.y, 0f));
            }

            return bounds;
        }
        else
        {
            return new Bounds();
        }
    }



    /// <summary>
    /// 寻找六边形中距离最近的点
    /// </summary>
    /// <param name="cellIndex"></param>
    /// <param name="centerPos"></param>
    /// <returns></returns>
    public static Vector3 FindNearestPoint(int cellIndex, Vector3 centerPos)
    {
        var map = EditorMap.Instance.Current;

        Dictionary<Vector3,float> vertices = new Dictionary<Vector3,float>();

        for (int index = 0;index < map.TerrainGridSystem.CellGetVertexCount(cellIndex); index++)
        {
            var vertex = map.TerrainGridSystem.CellGetVertexPosition(cellIndex, index);
            float distance = Vector3.Distance(vertex, centerPos);
            vertices.Add(vertex, distance);
        }

        vertices.Add(map.TGSCellIndex2WorldPosition(cellIndex), Vector3.Distance(map.TGSCellIndex2WorldPosition(cellIndex), centerPos));

        var neareatPoint = vertices.FirstOrDefault(x => x.Value == vertices.Values.Min()).Key;

        return neareatPoint;
    }
}