using System;
using System.IO;
using System.Threading.Tasks;
using UnityEngine;
using System.Collections;
using UnityEngine.Networking;

public class FileTool
{
    public static void CreateFile(string fileDict, string fileName)
    {
        if (!File.Exists(fileDict))
        {
            Directory.CreateDirectory(fileDict);
        }

        FileInfo file = new FileInfo($"{fileDict}/{fileName}");
        file.Create().Dispose();
    }

    public static void DeleteAllFile(string srcPath)
    {
        try
        {
            DirectoryInfo dir = new DirectoryInfo(srcPath);
            FileSystemInfo[] fileinfo = dir.GetFileSystemInfos(); //返回目录中所有文件和子目录
            foreach (FileSystemInfo i in fileinfo)
            {
                if (i is DirectoryInfo) //判断是否文件夹
                {
                    DirectoryInfo subdir = new DirectoryInfo(i.FullName);
                    subdir.Delete(true); //删除子目录和文件
                }
                else
                {
                    File.Delete(i.FullName); //删除指定文件
                }
            }
        }
        catch (Exception e)
        {
            Debug.Log($"delete {srcPath} error");
        }
    }

    public static void CreatePath(string path)
    {
        FileInfo fi = new FileInfo(path);
        DirectoryInfo dir = fi.Directory;
        if (!dir.Exists)
        {
            dir.Create();
        }
    }

    /// <summary>
    /// 加密/解密
    /// </summary>
    /// <param name="targetData">文件流</param>
    // public static void Encypt(ref byte[] targetData)
    // {
    //     //加密，与key异或，解密的时候同样如此
    //     int dataLength = targetData.Length;
    //     for (int i = 0; i < dataLength; ++i)
    //     {
    //         targetData[i] = (byte) (targetData[i] ^ ApplicationConst.Encry_Key);
    //     }
    // }

    /// <summary>
    /// 从本地文件中解密并加载AB包
    /// </summary>
    /// <param name="path"></param>
    /// <returns></returns>
//     public static async Task<AssetBundle> LoadAssetBundleFromBytes(string path)
//     {
//         // Log.Debug($"path : {path}");
//         byte[] content;
// #if UNITY_ANDROID && !UNITY_EDITOR
//         UnityWebRequest getFile = UnityWebRequest.Get(path);
//         UnityWebRequestAsyncOperation req = getFile.SendWebRequest();
//         while (!req.isDone)
//         {
//             await Task.Yield();
//         }

//         content = getFile.downloadHandler.data;
// #else
//         content = File.ReadAllBytes(path);
// #endif

//         Encypt(ref content);

//         var load = AssetBundle.LoadFromMemoryAsync(content);
//         do
//         {
//             await Task.Yield();
//         } while (!load.isDone);

//         return load.assetBundle;
//     }
}