using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;

/// <summary>
/// 版本管理
/// 其实说白了，就是下载所有需要更新资源滴...
/// 暂时读取的txt
/// 
/// </summary>
public class AssetGame_VersionManager : AssetGame_Base<AssetGame_VersionManager>
{



    bool NeedRestart = false;



    public enum EUpdateState
    {
        /// <summary>
        /// 时刻准备着
        /// </summary>
        None,
        /// <summary>
        /// 读取沙盒版本
        /// </summary>
        LoadPersisVersionFile,
        /// <summary>
        /// 读取内存版本
        /// </summary>
        LoadStreamVersionFile,
        /// <summary>
        /// 加载[解压]本地资源
        /// </summary>
        LoadLocalRes,
        /// <summary>
        /// 加载服务器资源
        /// </summary>
        LoadServerVersionFile,

        /// <summary>
        /// 服务器有需要下载的资源
        /// </summary>
        NeedDownload,
        /// <summary>
        /// 下载并更新本地资源
        /// </summary>
        LoadServerRes,
        /// <summary>
        ///搞定~ 
        /// </summary>
        Over,
        /// <summary>
        /// 重新启动
        /// </summary>
        Restart
    }

    EUpdateState _state = EUpdateState.None;

    #region Properties
    /// <summary>
    /// 本地资源列表
    /// </summary>
    private Dictionary<string, string> LocalResVersion;
    /// <summary>
    /// 服务器资源列表
    /// </summary>
    public Dictionary<string, string> ServerResVersion;

    /// <summary>
    /// 服务器资源大小的列表
    /// </summary>
    public Dictionary<string, string> ServerResSizeVersion;
    /// <summary>
    /// 本地只读资源列表
    /// </summary>
    private Dictionary<string, string> ReadResVersion;
    /// <summary>
    ///需要下载的资源
    /// </summary>
    private List<string> NeedDownFiles;
    /// <summary>
    /// 是否需要更新本地版本文件
    /// </summary>
    private bool NeedUpdateLocalVersionFile = false;
    /// <summary>
    /// 服务器文件流内容
    /// </summary>
    private string VersionFileContent = "";

    /// <summary>
    /// 服务器发回的最新版本号
    /// </summary>
    private string ServerVersion = "";


    #endregion


    #region  供外部调用
    /// <summary>
    /// 当前版本资源更新进度
    /// </summary>
    public EUpdateState getState
    {
        get { return _state; }
    }

    /// <summary>
    /// 当前版本更新的状态
    /// </summary>
    public EUpdateState setState
    {
        set
        {
            LogHelper.Log("当前执行状态【" + value + "】");
            _state = value;
        }
    }
    public void SetAwake()
    {
        //初始化  
        LocalResVersion = new Dictionary<string, string>();
        ServerResVersion = new Dictionary<string, string>();
        ServerResSizeVersion = new Dictionary<string, string>();
        ReadResVersion = new Dictionary<string, string>();
        NeedDownFiles = new List<string>();
    }

    public void SetRun(string newVersion)
    {
        GetPersisVersion();
        ServerVersion = newVersion;
    }

    #endregion


    /// <summary>
    /// 读沙盒版本
    /// </summary>
    void GetPersisVersion()
    {
        LogHelper.Log("```11````");
        setState = EUpdateState.LoadPersisVersionFile;

         /**
         * 首先读取沙盒中文件，如果没有，则表示第一次安装运行
         * Android之所以不支持C# IO流 方式读取StreamingAssets下的文件，是因为Android手机中
         * StreamingAssets下的文件都包含在压缩的.jar文件中（这基本上与标准的zip压缩文件的格
         * 式相同）。这意味着，如果你不使用Unity中的WWW类去检索文件，那么你需要使用额外的软
         * 件去查看.jar的存档并获取该文件。
         */
        AssetSystem_CoroutineProvider.Instance.StartCoroutine(AssetGame_ResourceUpdate.Ins.DownLoad(AssetConfig_GlobalSetting.strLocalSaveUrl + AssetConfig_GlobalSetting.strVersionFileName,
            delegate(WWW localVersion)
            {
                if (localVersion.text.Length != 0)
                {

                    /**
                     * 
                     */
                    LogHelper.Log("沙盒中已经存在版本对比文件,将内容读取到列表");
                    AssetGame_ResourceUpdate.Ins.ToParseVersionFileXml(localVersion.text, LocalResVersion, "LocalVersion");


                    SetServerVersion();
                }
                else
                {
                    LogHelper.Log("沙盒没有版本文件");
                    GetLocalVersion();
                }
            }
        ));
    }
    /// <summary> 
    /// 读取本地版本信息
    /// </summary>
    void GetLocalVersion()
    {
        setState = EUpdateState.LoadStreamVersionFile;
        LogHelper.Log("读取本地版本信息:" + AssetConfig_GlobalSetting.strLocalReadUrl + AssetConfig_GlobalSetting.strVersionFileName);
        AssetSystem_CoroutineProvider.Instance.StartCoroutine(AssetGame_ResourceUpdate.Ins.DownLoad(AssetConfig_GlobalSetting.strLocalReadUrl + AssetConfig_GlobalSetting.strVersionFileName,
            delegate (WWW orgVersion)
            {
                if (orgVersion.text.Length > 0)
                {

                    LogHelper.Log("复制本地的version到沙盒中:" + orgVersion.text);

                    AssetGame_ResourceUpdate.Ins.ToParseVersionFileXml(orgVersion.text, ReadResVersion, "orgVersion");
                    LogHelper.Log("重写文件:" + AssetConfig_GlobalSetting.strVersionFileName);
                    AssetSystem_AndroidFileHelper.Instance.ReWriteFileByString(AssetConfig_GlobalSetting.strVersionFileName, orgVersion.text);
                    AssetGame_ResourceUpdate.Ins.ToParseVersionFileXml(orgVersion.text, LocalResVersion, "LocalVersion");

                    LogHelper.Log("复制完毕！");

                    setState = EUpdateState.LoadLocalRes;


                    SetServerVersion();

                }
                else
                {
                    SetServerVersion();
                    LogHelper.Log("出大事了！！！！！！！！！没有读取到本地版本文件！");

                }
            }));
    }
    /// <summary>
    /// 更新服务器端的版本信息
    /// </summary>
    public void SetServerVersion()
    {
        setState = EUpdateState.LoadServerVersionFile;
        string cdnpath = AssetConfig_GlobalSetting.strServerUrl + ServerVersion + "/";
        string cdnfile = GlobalConfig.ClientVersion + "---" + ServerVersion + ".txt";
        LogHelper.Log(cdnpath + "" + cdnfile);
        AssetGame_ResourceUpdate.Ins.SetProgress(0);
        AssetSystem_CoroutineProvider.Instance.StartCoroutine(AssetGame_ResourceUpdate.Ins.DownLoad(cdnpath + cdnfile, delegate (WWW serverVersion)
        {
            LogHelper.Log("加载网络CDN资源:" + cdnpath + cdnfile);
            if (serverVersion.error != null)
            {
                LogHelper.Log(serverVersion.error);
                return;
                //    LogHelper.Log("当前网络不可用，请检查后重试 服务器正在维护中，请稍后重试");
            }

            //保存服务端version  
            AssetGame_ResourceUpdate.Ins.ToParseVersionFileXml(serverVersion.text, ServerResVersion, "ServerVersion");
            AssetGame_ResourceUpdate.Ins.ToParseVersionFileSizeXml(serverVersion.text, ServerResSizeVersion, "ServerResSizeVersion");
            VersionFileContent = serverVersion.text;
            ////计算出需要重新加载的资源  
            GetCompareVersion();
        }));
    }
    /// <summary>
    /// 去下载服务器版本
    /// </summary>
    void GetServerRes()
    {
        //本次有更新，同时更新本地的version.txt  
        NeedUpdateLocalVersionFile = AssetGame_ResourceUpdate.Ins.GetNeedDownFilesCount > 0;

        if (!NeedUpdateLocalVersionFile)
        {
            if (NeedRestart)
            {
                LogHelper.Log("已是最新版本！重启游戏！");
                AssetGame_ResourceUpdate.Ins.DownLoadRes(ServerVersion);
                PlayerPrefs.Save();
                GlobalConfig.ClientVersion = ServerVersion;
                setState = EUpdateState.Restart;
            }
            else
            {
                LogHelper.Log("已是最新版本！无需更新！!!!~~~~~~~~~~~~~~~");
                PlayerPrefs.SetString("Version", ServerVersion);
                PlayerPrefs.Save();
                GlobalConfig.ClientVersion = ServerVersion;
                setState = EUpdateState.Over;
            }
        }
        else
        {
            GlobalConfig.ClientVersion = ServerVersion;
            setState = EUpdateState.NeedDownload;
            AssetGame_ResourceUpdate.Ins.SetMaxBundleNum = AssetGame_ResourceUpdate.Ins.GetNeedDownFilesCount;
            AssetGame_ResourceUpdate.Ins.DownLoadRes(ServerVersion);
            return; 
            
        }
    }

    /// <summary>
    /// 开始下载更新.
    /// </summary>
    public void StartDownload()
    {
        setState = EUpdateState.LoadServerRes;
        //加载需要更新的资源  
        AssetGame_ResourceUpdate.Ins.SetMaxBundleNum = AssetGame_ResourceUpdate.Ins.GetNeedDownFilesCount;
        AssetGame_ResourceUpdate.Ins.DownLoadRes(ServerVersion);
    }
    /// <summary>
    /// 对比服务器和本地版本
    /// </summary>
    void GetCompareVersion()
    {
        int num = 0;
        foreach (var version in ServerResVersion)
        {
            string fileName = version.Key;
            string serverMd5 = version.Value;

           
            //新增的资源  
            if (!LocalResVersion.ContainsKey(fileName))
            {
                if (fileName.Equals("Assembly-CSharp.dll"))
                {
                    NeedRestart = true;
                }
                LogHelper.Log("新增资源" + fileName);
                string serverResSize;
                ServerResSizeVersion.TryGetValue(fileName, out  serverResSize);
                num += int.Parse(serverResSize);
            //    LogHelper.Log("数据量大小：" + num);
                AssetGame_ResourceUpdate.Ins.SetMaxBundleSize = num;
                AssetGame_ResourceUpdate.Ins.AddLoadRes(fileName);
            }
            else
            {
                //需要替换的资源  
                string localMd5;
                LocalResVersion.TryGetValue(fileName, out localMd5);
                
                if (serverMd5!=localMd5)
                {
                    if (fileName.Equals("Assembly-CSharp.dll"))
                    {
                        NeedRestart = true;
                    }
                    LogHelper.Log("localMd5=" + localMd5 + "/serverMd5=" + serverMd5);

                    LogHelper.Log("需要下载更新的资源=" + fileName);

                    string  serverResSize;
                    ServerResSizeVersion.TryGetValue(fileName, out  serverResSize);
                    num +=int .Parse ( serverResSize);
                 //   LogHelper.Log ("数据量大小：" + num);
                    AssetGame_ResourceUpdate.Ins.SetMaxBundleSize = num;
              //    LogHelper.Log("数据量大小1111：" +AssetGame_ResourceUpdate.Ins.GetMaxBundleSize );
                    AssetGame_ResourceUpdate.Ins.AddLoadRes(fileName);  
                }
            }
        }
        
        GetServerRes();
    }
    /// <summary>
    /// 更新本地的version配置 
    /// </summary>
    public void SetUpdateLocalVersionFile()

    {
        //AssetSystem_AndroidFileHelper.Ins.ReWriteFileByString(
        //    AssetConfig_GlobalSetting.strVersionFileName, 
        //    VersionFileContent);
        if (NeedRestart)
        {
            LogHelper.Log("已更新到最新版本！重启游戏！");
            setState = EUpdateState.Restart;
        }
        else
        {
            PlayerPrefs.SetString("Version", ServerVersion);
            PlayerPrefs.Save();

            LogHelper.Log("更新完毕");

            setState = EUpdateState.Over;
        }
     //   //加载显示对象  
     //StartCoroutine(Show());
    }

    /// <summary>
    /// 显示资源  
    /// </summary>
    /// <returns></returns>
    //private IEnumerator Show()
    //{
    //    LogHelper.Log(AssetConfig_GlobalSetting.LOCAL_RES_URL + "Assets.Prefab.UI.TestAWindow.assetbundle");
    //    WWW asset = new WWW(AssetConfig_GlobalSetting.LOCAL_RES_URL + "Assets.Prefab.UI.TestAWindow.assetbundle");
    //    yield return asset;
    //    AssetBundle bundle = asset.assetBundle;
    //    Object obj1 = bundle.LoadAsset("Assets.Prefab.UI.TestAWindow");
    //    yield return Instantiate(obj1);
    //    bundle.Unload(false);
    //    yield return null;
    //}

}