using Axibug;
using Axibug.Runtime;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using UnityEngine;
using static Axibug.Utility;

namespace Game
{
    public class UpdateComponent : GameComponent
    {
        private float _process = 0;
        public float ProcessValue { get { return _process; } }

        public bool CheckVersionList()
        {
            //1 判断 版本号 是不是需要重新下载新的版本？ 1.0 2.0
            string[] arr1 = HotData.curHot.version_local.Split('.');
            string[] arr2 = HotData.curHot.version_remote.Split('.');

            if (HotData.curHot.filename == HotPlatform.versionTxt)
            {
                if (arr1.Length == arr2.Length && arr1.Length == 2)
                {
                    if (arr1[0] != arr2[0])
                    {
                        //@Test 暂时不实现此功能
                        Log.Info($"请下载最新版本...local: {HotData.curHot.version_local}  /remote: {HotData.curHot.version_remote}");

                        //网络错误，提示是否重新下载
                        AppEntry.ShowMessageBox("系统提示", "当前游戏版本过旧，是否前往更新", "确定", "退出",
                           () => { GotoUpdateApp(); },
                           () => { AppEntry.QuitGame(); });

                        return false;
                    }
                }
            }

#if UNITY_IOS
            //1 如果是送检版本 不需要热更新
            if (Application.version == HotData.xml.versionCheck || HotData.xml.versionCheck == "0.0")
            {
                //开始加载
                HotData.curHot.state = 1;
                HotData.curHot.diffCount = 0;
                HotData.curHot.diff.Clear();
                Debug.Log("送检版本 beginLoad..." + HotData.xml.versionCheck);
                return false;
            }
#endif

            //如果没有本地文件，直接返回
            //if (HotData.curHot.local.Count == 0)
            //{
            //    _process = 1;
            //    HotData.curHot.diff = new List<FileData>(HotData.curHot.remote.Values);
            //    return true;
            //}


            //2 查找差分文件
            HotData.curHot.curBytes = 0;
            HotData.curHot.totalBytes = 0;
            int idx = 0;
            foreach (var d in HotData.curHot.remote.Values)
            {
                idx++;
                _process = (float)idx / HotData.curHot.remote.Count;

                FileData jd = null;
                HotData.curHot.local.TryGetValue(d.filename, out jd);
                //从本地版本文件查找
                if (jd != null)
                {
                    //如果有，并且哈希和文件长度一样
                    if (jd.hash == d.hash && jd.length == d.length)
                    {
                        //默认本地路径为Application.persistentDataPath路径，不再判断StreamAssets路径
                        string path = Utility.Path.GetUpdateWriteFilePath(d.filename);
                        bool isexitst = File.Exists(path);
                        //最后判断文件是否存在，如果在，就不需要更新
                        if (isexitst)
                            continue;
                    }
                }
                else
                {
                    if (!HadFile(d))
                        continue;
                }
                //没有的文件是否删除？
                HotData.curHot.totalBytes += d.length;
                HotData.curHot.diff.Add(d);
            }

            HotData.curHot.diffCount = HotData.curHot.diff.Count;

            return HotData.curHot.diffCount > 0;
        }

        private bool HadFile(FileData d)
        {
            //如果本地版本文件里不存在
            string path = Utility.Path.GetUpdateWriteFilePath(d.filename);
            bool isexitst = File.Exists(path);
            //判断文件是否存在，如果在
            if (isexitst)
            {
                string filemd5 = string.Empty;
                int fileLen = 0;
                try
                {
                    //计算md5
                    using (var fileStream = File.OpenRead(path))
                    {
                        fileLen = (int)fileStream.Length;
                        var md5 = MD5.Create();
                        var fileMD5Bytes = md5.ComputeHash(fileStream);//计算指定Stream 对象的哈希值                                     
                        filemd5 = System.BitConverter.ToString(fileMD5Bytes).Replace("-", "").ToLower();//将byte[]装换成字符串
                    }
                }
                catch (System.Exception ex) { }

                //并且哈希和文件长度一样，则不需要下载
                if (d.hash == filemd5 && d.length == fileLen)
                    return false;
            }


            return true;
        }

        private void GotoUpdateApp()
        {
            string url = null;
#if UNITY_EDITOR_WIN || UNITY_STANDALONE_WIN
            url = AppEntry.BuiltinData.BuildInfo.WindowsAppUrl;
#elif UNITY_IOS
            url = AppEntry.BuiltinData.BuildInfo.IOSAppUrl;
#elif UNITY_ANDROID
            url = AppEntry.BuiltinData.BuildInfo.AndroidAppUrl;
#endif
            if (!string.IsNullOrEmpty(url))
            {
                UnityEngine.Application.OpenURL(url);
            }
        }

        public string GetByteLengthString(long byteLength)
        {
            if (byteLength < 1024L) // 2 ^ 10
            {
                return Text.Format("{0} Bytes", byteLength);
            }

            if (byteLength < 1048576L) // 2 ^ 20
            {
                return Text.Format("{0:F2} KB", byteLength / 1024f);
            }

            if (byteLength < 1073741824L) // 2 ^ 30
            {
                return Text.Format("{0:F2} MB", byteLength / 1048576f);
            }

            if (byteLength < 1099511627776L) // 2 ^ 40
            {
                return Text.Format("{0:F2} GB", byteLength / 1073741824f);
            }

            if (byteLength < 1125899906842624L) // 2 ^ 50
            {
                return Text.Format("{0:F2} TB", byteLength / 1099511627776f);
            }

            if (byteLength < 1152921504606846976L) // 2 ^ 60
            {
                return Text.Format("{0:F2} PB", byteLength / 1125899906842624f);
            }

            return Text.Format("{0:F2} EB", byteLength / 1152921504606846976f);
        }
    }
}