using System.Collections.Generic;
using System.Linq;
using Data;
using UnityEngine;
using UnityEngine.Tilemaps;

namespace Map
{
    public class DoubleMap : MonoBehaviour
    {
        public List<List<int>> mapData = new();
        // public Tilemap dataLevel;
        public Tilemap textureLevel;

        public Dictionary<string, TileBase> tileDict = new();
        void Start()
        {
            TileManager.Instance.Init();
            var mapSize = 10;
            float noiseScale = 0.1f;
            
            for (int x = 0; x < mapSize; x++)
            {
                List<int> col = new();
                for (int y = 0; y < mapSize; y++)
                {
                    // 计算柏林噪声值
                    float noiseValue = Mathf.PerlinNoise(x * noiseScale, y * noiseScale);
                    if (noiseValue < 0.5f) // 小于 0.5 表示 Dirt
                    {
                        col.Add(TileManager.Instance.tileID.GetValueOrDefault("Dirt"));
                    }
                    else // 大于等于 0.5 表示 Grass
                    {
                        col.Add(TileManager.Instance.tileID.GetValueOrDefault("Grass"));
                    }

                }
                mapData.Add(col);
                UpdateTexture();
            }
        }

        public void UpdateTexture()
        {
            for (int i = 0; i < mapData.Count; i++)
            {
                for (int j = 0; j < mapData[i].Count; j++)
                {
                    UpdateTexture(i, j);
                }
            }
        }

        public int GetTile(int x, int y)
        {
            if (x < 0 || x >= mapData.Count)
            {
                return 0;
            }

            var col = mapData[x];
            if (y < 0 || y >= mapData.Count)
            {
                return 0;
            }

            return col[y];
        }

        public void SetTile(int x, int y, string tileName)
        {
            SetTile(x,y,TileManager.Instance.tileID.GetValueOrDefault(tileName));
        }

        public void SetTile(int x, int y, int id)
        {
            mapData[x][y] = id;
            UpdateTexture(x, y);
            UpdateTexture(x, y-1);
            UpdateTexture(x-1, y);
            UpdateTexture(x-1, y-1);
        }
        /// <summary>
        /// 更新对应坐标的贴图
        /// </summary>
        /// <param name="x"></param>
        /// <param name="y"></param>
        /// <returns></returns>
        public void UpdateTexture(int x, int y)
        {
            var lt = GetTile(x, y + 1);
            var rt = GetTile(x + 1, y + 1);
            var lb = GetTile(x, y);
            var rb = GetTile(x + 1, y);
            if (TileManager.Instance.tileToTileBaseMapping.ContainsKey((lt, rt, lb, rb)))
            {
                textureLevel.SetTile(new(x,y),TileManager.Instance.tileToTileBaseMapping[(lt, rt, lb, rb)]);
            }
        }
    }

    public class TileManager:Utils.Singleton<TileManager>
    {
        public Dictionary<string,TileBase> tileBaseMapping = new();
        public Dictionary<(int, int, int, int), TileBase> tileToTileBaseMapping = new();
        public Dictionary<string, int> tileID = new();
        public void Init()
        {
            if (tileToTileBaseMapping.Count > 0)
                return;
            Managers.PackagesImageManager.Instance.Init();
            var imagePack = Managers.PackagesImageManager.Instance;
            var tileType = Managers.DefineManager.Instance.QueryDefinesByType<TileDef>();
            for (var i = 0; i < tileType.Length; i++)
            {
                tileID.Add(tileType[i].name, i);
            }
            
            var tileTextureMappingDef=Managers.DefineManager.Instance.QueryDefinesByType<TileMappingTableDef>();
            foreach (var mappingTableDef in tileTextureMappingDef)
            {
                foreach (var keyVal in mappingTableDef.tileDict)
                {
                    var key = keyVal.Key;
                    var val = keyVal.Value;
                    var parts = key.Split('_');
                    if (parts.Length != 4)
                    {
                        var packName = Managers.DefineManager.Instance.GetDefinePackageName(mappingTableDef);
                        Debug.LogError($"来自{packName}定义的TileMappingTableDef键值{key}内容不合法!\n应该为[瓦片名称_瓦片名称_瓦片名称_瓦片名称]的格式");
                        continue;
                    }

                    if (!(tileID.TryGetValue(parts[0], out var k1) &&
                          tileID.TryGetValue(parts[1], out var k2) &&
                          tileID.TryGetValue(parts[2], out var k3) &&
                          tileID.TryGetValue(parts[3], out var k4)))
                    {
                        var packName = Managers.DefineManager.Instance.GetDefinePackageName(mappingTableDef);
                        Debug.LogError($"来自{packName}定义的TileMappingTableDef键值{key}中存在未定义的瓦片名称");
                        continue;
                    }

                    var sprite = imagePack.GetSprite(val);
                    if (sprite == null)
                    {
                        var packName = Managers.DefineManager.Instance.GetDefinePackageName(mappingTableDef);
                        Debug.LogError($"来自{packName}定义的TileMappingTableDef键值{val}中存在未定义的图片名称");
                        continue;
                    }

                    if (tileToTileBaseMapping.ContainsKey((k1, k2, k3, k4)))
                    {
                        var packName = Managers.DefineManager.Instance.GetDefinePackageName(mappingTableDef);
                        Debug.LogWarning($"来自{packName}定义的TileMappingTableDef键值{(k1, k2, k3, k4)}存在重复索引，将忽略重复项");
                        continue;
                    }

                    var tile = LoadTile(sprite);
                    tileToTileBaseMapping[(k1, k2, k3, k4)] = tile;
                    tileBaseMapping[val] = tile;
                }
            }
        }

        public void Reload()
        {
            tileToTileBaseMapping.Clear();
            Init();
        }

        public TileBase LoadTile(Sprite sprite)
        {
            var newTile = ScriptableObject.CreateInstance<Tile>();
            newTile.sprite = sprite;
            newTile.color = Color.white; 
            newTile.colliderType = Tile.ColliderType.Sprite;
            return newTile;
        }
    }
}