using UnityEngine;
using System.Collections.Generic;
using System;
using UnityEngine.U2D;
using System.IO;
using UnityEngine.Video;
using Spine.Unity;



#if UNITY_EDITOR
using UnityEditor;
#endif

using LaunchCommon;

public class ResManager : Singleton<ResManager>
{
    

    //不下载时本地安卓测试路径
    // public string assetBundlesPath = Application.dataPath + "/../AssetBundles/Android/";
    // public static string bytesFolderName = "logicbytes/";
    public string StreamingAssetPath
    {
        get
        {
            return ResourcesPath.Instance.StreamingAssetPath;
        }
    }
    public string ExternalStorePath 
    {
        get
        {
            return ResourcesPath.Instance.ExternalStorePath;
        }
    }

    //用于editor 下的资源路径
    public string ResourcesOutPath 
    {
        get
        {
            return ResourcesPath.ResourcesOutPath;
        }
    }

    public string CONFIG_FODLER
    {
        get
        {
            return ResourcesPath.CONFIG_FODLER;
        }
    }

    public string ResourcesOutAssetPath
    {
        get
        {
            return ResourcesPath.ResourcesOutAssetPath;
        }
    }
    
    private static readonly Dictionary<Type, string> fileExtensionDict = new Dictionary<Type, string>()
    {
        {typeof(GameObject), "prefab"},
        {typeof(Sprite), "png"},
        {typeof(Texture2D), "png"},
        {typeof(Shader), "shader"},
        {typeof(TextAsset), "txt"},
        {typeof(AudioClip), "wav"},
        {typeof(Font), "ttf"},
        {typeof(Material), "mat"},
        {typeof(VideoClip), "mp4"},
        {typeof(SpriteAtlas), "spriteatlasv2"},
        {typeof(SkeletonDataAsset), "asset"},
    };


    public void Init()
    {

    }

    public void Release()
    {

    }
    
    private string GetExtension(Type type)
    {
        if (fileExtensionDict.TryGetValue(type, out string extension))
            return "." + extension;
        else
        {
            Debug.LogErrorFormat("GetExtension() => 不支持的资源类型: {0}.", type.Name);
            return "";
        }
    }

#if UNITY_EDITOR
    public string GetFullDirectory(string directory)
    {
        string fullDirectory = Path.Combine(ResourcesOutPath, directory);
        return fullDirectory;
    }

    public string FindFilePath(string directory, string fileName)
    {
        string[] files = Directory.GetFiles(GetFullDirectory(directory), fileName, SearchOption.AllDirectories);
        if (files.Length > 0)
        {
            return files[0];
        }
        return string.Empty;
    }

    public string GetRelativePath(string absolutePath)
    {
        string relativePath = absolutePath.Replace(ResourcesOutPath, "Assets/ResourcesOut/");
        return relativePath;
    }
#endif

    public T LoadAsset<T> (string directory, string name) where T : UnityEngine.Object
    {
        T asset = null;
        //  特殊处理 因为有一层图集的关系 directory要传入的应该是atlas的名字
        if (typeof(T) == typeof(Sprite))
        {
            return LoadSprite(directory, name) as T;
        }

        return LoadAssetInternal<T>(directory, name);
    }

    private T LoadAssetInternal<T>(string directory, string name) where T : UnityEngine.Object
    {
        T asset = null;

        var path = ($"Assets/ResourcesOut/{directory}/{name}" + GetExtension(typeof(T))).Replace("//", "/").Trim().Replace("\\", "/");
        if (!AssetSource.isUseAssetBundle)
        {
#if UNITY_EDITOR
            asset = UnityEditor.AssetDatabase.LoadAssetAtPath<T>(path);
#endif
        }
        else
        {
            var assetInfo = new AssetInfo(directory.ToLower(), name.ToLower());
            asset = AssetBundleUtility.Instance.Sync_LoadAsset(assetInfo, typeof(T)) as T;
        }

        if (asset == null)
        {
            Debug.LogErrorFormat("LoadAsset() => 加载不到资源: {0}", path);
        }

        return asset;
    }

    public string[] LoadConfig(string name)
    {
        string path = string.Empty;
        if (!AssetSource.isUseAssetBundle)
        {
#if UNITY_EDITOR
            path = ResourcesPath.CONFIG_FODLER + "/" + name + ".txt";
#endif
        }
        else
        {
            path = AssetVersionUtility.GetAssetFilePath($"Config/{name}.txt");
        }

        return File.ReadAllLines(path);
    }

    private Sprite LoadSprite(string atlasName, string spriteName)
    {
#if !UNITY_EDITOR
        SpriteAtlas atlas = LoadAsset<SpriteAtlas>("Sprite", atlasName.Replace("Sprite/", ""));
        return atlas.GetSprite(spriteName);
#else
        return ResManager.Instance.LoadAssetInternal<Sprite>(atlasName, spriteName);
#endif
    }

    public void LoadAssetAsync<T>(string directory, string name, Action<bool, UnityEngine.Object> callBack) where T : UnityEngine.Object
    {
        //  特殊处理 因为有一层图集的关系 directory要传入的应该是atlas的名字
        if (typeof(T) == typeof(Sprite))
        {
            LoadSpriteAsync<T>(directory, name, callBack);
            return;
        }

        LoadAssetAsyncInternal<T>(directory, name, callBack);
    }

    private void LoadSpriteAsync<T>(string atlasName, string spriteName, Action<bool, UnityEngine.Object> callBack) where T : UnityEngine.Object
    {
#if !UNITY_EDITOR
        LoadAssetAsync<SpriteAtlas>(atlasName, spriteName, (isLoaded, atlas) => {
            if (isLoaded)
            {
                callBack?.Invoke(isLoaded, atlas.GetSprite(spriteName));
            }
            else
            {
                callBack?.Invoke(false, null);
            }
        });
#else
        //  编辑器下可以直接加载没啥问题
        LoadAssetAsyncInternal<T>(atlasName, spriteName, callBack);
#endif
    }

    private void LoadAssetAsyncInternal<T>(string directory, string name, Action<bool, UnityEngine.Object> callBack) where T : UnityEngine.Object
    {
        var path = string.Concat($"Assets/ResourcesOut/{directory}/{name}", GetExtension(typeof(T))).Replace("//", "/");

        if (!AssetSource.isUseAssetBundle)
        {
#if UNITY_EDITOR
            var asset = UnityEditor.AssetDatabase.LoadAssetAtPath<T>(path);
            callBack?.Invoke(asset != null, asset);
#endif
        }
        else
        {
            var assetInfo = new AssetInfo(directory.ToLower(), name.ToLower());
            AssetBundleUtility.Instance.Co_LoadAsset(assetInfo, callBack);
        }
    }

    public void UnloadAsset(string assetBundleName, string assetName)
    {
        if (!AssetSource.isUseAssetBundle)
            return;

        AssetBundleUtility.Instance.UnloadAsset(assetBundleName, assetName);
    }

    public void UnloadAssetBundle(string assetBundleName, bool unloadAllLoadedObjects, bool includeDependenice)
    {
        if (!AssetSource.isUseAssetBundle)
            return;
        AssetBundleUtility.Instance.UnloadAssetBundle(assetBundleName, unloadAllLoadedObjects, includeDependenice);
    }

    public string GetAssetFilePath(string _assetKey)
    {
        var path = Path.Combine(ExternalStorePath, _assetKey);
        if (!File.Exists(path))
        {
            path = Path.Combine(StreamingAssetPath, _assetKey);
        }

        return path;
    }


}