using Cysharp.Threading.Tasks;
using HxGame;
using HxGame.Data;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Runtime.Remoting.Metadata.W3cXsd2001;
using System.Security.Policy;
using System.Threading;
using System.Xml;
using System.Xml.Linq;
using UnityEditor;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.Rendering;
using UnityEngine.UI;
using UnityEngine.UIElements;
using static MapManager;

public partial class MapManager : MonoBehaviour
{
    [SerializeField]
    private Transform mapRegion;
    public Dictionary<string, (int maxRow, int maxCol)> allMaps = new Dictionary<string, (int maxRow, int maxCol)>();
    public bool LoadObsXml()
    {
        if (_curOpenMapId < 0)
        {
            UIWindow.Instance.ShowMessage("请先打开地图");
            return false;
        }

        string path = string.Empty;

        path = PathUtil.GetXmlPath(_curOpenMapId, "Obs");

        if (!File.Exists(path))
        {
            UIWindow.Instance.ShowMessage("没有找到网格文件, 将重新计算格子");
            return false;
        }

        XmlDocument xmlDocument = new XmlDocument();
        xmlDocument.Load(path);

        XmlNode xmlRoot = xmlDocument.SelectSingleNode("Item");

        string ID = xmlRoot.Attributes.GetNamedItem("ID").Value;
        mapWidth = Convert.ToInt32(xmlRoot.Attributes.GetNamedItem("MapWidth").Value);
        mapHeight = Convert.ToInt32(xmlRoot.Attributes.GetNamedItem("MapHeight").Value);

        int cellCount = 0;

        _cellWidth = Convert.ToInt32(xmlRoot.Attributes.GetNamedItem("CellWidth").Value);
        _cellHeight = Convert.ToInt32(xmlRoot.Attributes.GetNamedItem("CellHeight").Value);
        _cellRows = mapHeight / _cellHeight;
        _cellCols = mapWidth / _cellWidth;
        cellCount = _cellRows * _cellCols;


        string strData = xmlRoot.Attributes.GetNamedItem("Value").Value;

        //0,0,1,0;0,1,1,1;0,2,1,2;
        string[] values = strData.Split(';');
        if (values.Length != cellCount)
        {
            UIWindow.Instance.ShowMessage("网格数据错误");
            return false;
        }

        cellsNode = new CellNode[cellCount];
        for (int i = 0; i < cellCount; i++)
        {
            string[] strCell = values[i].Split(',');

            if (strCell.Length != 3)
                continue;

            int y = Convert.ToInt32(strCell[0]);
            int x = Convert.ToInt32(strCell[1]);
            int type = Convert.ToInt32(strCell[2]);

            //有些格子之前有点问题
            CellType celltype = (CellType)type;
            if ((celltype & CellType.HadRole) > 0)
                celltype ^= CellType.HadRole;

            cellsNode[i] = new CellNode(x, y, i, celltype);
        }
        return true;
    }
    public void LoadRegionXML(int mapId)
    {
        Transform regionsTrans = UIWindow.Instance.mapTrans.Find("Regions");
        if (regionsTrans == null)
        {
            UIWindow.Instance.ShowMessage("没有找到Regions节点");
            return;
        }

        MapRegions mapRegions = new MapRegions();
        mapRegions.mapWidth = Convert.ToInt32(txtMapWidth.text);
        mapRegions.mapHeight = Convert.ToInt32(txtMapHeight.text);
        mapRegions.regionWidth = Convert.ToInt32(txtRegionWidth.text);
        mapRegions.regionHeight = Convert.ToInt32(txtRegionHeight.text);

        int row = mapRegions.mapWidth / MapManager.CELLSCALE / mapRegions.regionWidth;
        int col = mapRegions.mapHeight / MapManager.CELLSCALE / mapRegions.regionHeight;

        Transform trans = null;
        mapRegions.regions = new Region[row, col];
        for (int i = 0; i < row; i++)
        {
            for (int j = 0; j < col; j++)
            {
                mapRegions.regions[i, j] = new Region();
                mapRegions.regions[i, j].indexX = i;
                mapRegions.regions[i, j].indexY = j;

                string regionName = $"{i}_{j}";
                trans = regionsTrans.Find(regionName);
                if (trans == null)
                {
                    UIWindow.Instance.ShowMessage($"没有找到region节点 name={regionName}");
                    return;
                }

                //mapRegions.regions[i, j].regionName = trans.GetComponent<Image>().sprite.name;
                mapRegions.regions[i, j].regionName = trans.GetComponent<RawImage>().texture.name;
            }
        }

        mapRegions.SaveXML(mapId);
    }

    public void LoadMapRegions(int mapId)
    {
        _curOpenMapId = mapId;
        if (!allMaps.TryGetValue(mapId.ToString(),out var mapInfo))
        {
            UIWindow.Instance.ShowMessage("地图不存在。。。");
            return;
        }
        int mapRownum = mapInfo.maxRow;
        int mapColumn = mapInfo.maxCol;
        //平铺;
        float jpgscenew = 512f / 100;
        MapManager.Instance.ReseCamera(jpgscenew * mapColumn, jpgscenew * mapRownum);
        MapManager.Instance.GenerateMap(jpgscenew * mapColumn, jpgscenew * mapRownum, 0.48f, 0.32f);
        for (int row = 0; row < mapRownum; row++)
        {
            for (int col = 0; col < mapColumn; col++)
            {
                string filename = $"v{mapId}_r{row + 1}_c{col + 1}";  // 构造文件名，v1000_r1_c1.jpg
                string spPath = PathUtil.GetMapTexure(1000, filename, "jpg");
                GameObject obj = new GameObject(filename);
                obj.transform.SetParent(mapRegion);
                SpriteRenderer sr = obj.AddComponent<SpriteRenderer>();
                float x = col * jpgscenew;
                float y = (mapRownum - row - 1) * jpgscenew;
                obj.transform.position = new Vector2(x, y);
                multithreadLoadTextrue(spPath,sr);
            }
        }
    }
    public void ClearMapRegions()
    {
        ClearMapGrid();
        foreach (Transform child in mapRegion)
        {
            Destroy(child.gameObject);
        }
    }
    private async void multithreadLoadTextrue(string fullPath,SpriteRenderer sr)
    {
        var texture = await loadASyncTexture2D(fullPath, this.GetCancellationTokenOnDestroy());
        if (texture != null)
        {
            sr.sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), Vector2.zero, 100f);
        }
    }

    private UniTask<Texture2D> loadASyncTexture2D(string fullPath,CancellationToken token)
    {
        return UniTask.RunOnThreadPool(async () =>
        {
            if (!File.Exists(fullPath))
            {
                Debug.LogError($"File not found: {fullPath}");
                return null;
            }
            // 在线程池中异步读取文件
            byte[] bytes = await File.ReadAllBytesAsync(fullPath, token);
            // 切换到主线程处理纹理
            await UniTask.Yield(PlayerLoopTiming.Update);
            Texture2D texture = new Texture2D(2, 2); // 初始大小
            if (texture.LoadImage(bytes))
            {
                return texture;
            }
            else
            {
                Debug.LogError($"Failed to load image from {fullPath}");
                return null;
            }
        });
    }
    IEnumerator LoadSpriteT(string spName, GameObject go, SpriteRenderer sprite)
    {
        if (File.Exists(spName))
        {
            byte[] bytes = File.ReadAllBytes(spName);
            Texture2D texture = new Texture2D(2, 2); // 初始大小，稍后调整
            if (texture.LoadImage(bytes)) // 解码 JPG 到 Texture2D
            {
                sprite.sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), Vector2.zero, 100f);
                Debug.Log($"Loaded {spName} successfully");
            }
            else
            {
                Debug.LogError($"Failed to load image from {spName}");
            }
        }
        else
        {
            Debug.LogError($"File not found: {spName}");
        }
        yield break;
        //using (UnityWebRequest req = UnityWebRequestTexture.GetTexture(spName))
        //{
        //    yield return req.SendWebRequest();
        //    if (req.result == UnityWebRequest.Result.Success)
        //    {
        //        Texture2D tt = DownloadHandlerTexture.GetContent(req);
        //        if (tt == null)
        //            yield break;
        //        sprite.sprite = Sprite.Create(tt, new Rect(0, 0, tt.width, tt.height), Vector2.zero, 100f);
        //    }
        //    else
        //    {
        //        UIWindow.Instance.ShowMessage(req.error);
        //    }
        //}
    }

    internal void SaveCellsXml()
    {
        throw new NotImplementedException();
    }
}