using AutoUpdater.Entity;
using AutoUpdater.Util;
using ICSharpCode.SharpZipLib.Zip;
using log4net;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows;
using VersionControl;
using Path = System.IO.Path;

namespace AutoUpdater
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        private static ILog Logger = LogManager.GetLogger("AutoUpdater");
        #region 字段
        /// <summary>
        /// SolidWorks 主窗口进程PID
        /// </summary>
        private int SwMainProcessId { get; set; } = -1;

        /// <summary>
        /// exe文件路径
        /// </summary>
        private DirectoryInfo CurrentPath { get; set; }

        /// <summary>
        /// 更新时所用的临时文件夹
        /// </summary>
        private string TempDir { get; set; }

        /// <summary>
        /// 下载文件的临时路径
        /// </summary>
        private string DownloadDir { get; set; }

        /// <summary>
        /// 临时解压缩文件夹
        /// </summary>
        private string UnZipDir { get; set; }

        /// <summary>
        /// SolidWorks程序启动路径
        /// </summary>
        private string SwAppPath { get; set; }

        /// <summary>
        /// 要更新的AppId
        /// </summary>
        private string AppId { get; set; }
        /// <summary>
        /// 本地版本
        /// </summary>
        private string CurrentVersion { get; set; }
        #endregion

        public MainWindow()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 窗口加载完成后执行，关掉SolidWorks主进程，进行更新操作
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            Logger.Info("自动更新程序启动...");
            string[] args = Environment.GetCommandLineArgs();
            // 有参数，说明是从SolidWork插件启动的，需要kill solidwork进程
            SwMainProcessId = args.Length >= 2 ? int.Parse(args[1]) : -1;
            // 初始化程序路径
            CurrentPath = new DirectoryInfo(Assembly.GetExecutingAssembly().Location).Parent;
            Init();
            if (SwMainProcessId > 0)
            {
                // 可能需要关进程，可能不需要
                Close_SwMainProcess();
            }
            else
            {
                // 从exe文件中获取本地插件版本
                GetCurrentVersion();
                // 检查插件的更新
                CheckPluginUpdate();
            }
        }

        public void KillProcessByFullPath(string exePath)
        {
            string exeName = Path.GetFileNameWithoutExtension(exePath);
            Process[] ps = Process.GetProcessesByName(exeName);
            if (ps.Length > 0)
            {
                foreach (Process p in ps)
                {
                    if (new Uri(p.MainModule.FileName) == new Uri(exePath))
                    {
                        p.Kill();
                    }
                }
            }
        }

        /// <summary>
        /// 终止两个Listener相关进程
        /// </summary>
        public void KillListenerProcess()
        {
            string dir = Path.GetDirectoryName(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
            string path1 = Path.Combine(dir, "Listener", "SolidWorksListener.exe");
            string path2 = Path.Combine(dir, "Alert.exe");
            KillProcessByFullPath(path1);
            // 暂停一秒不然AlertKill不掉
            Thread.Sleep(1000);
            KillProcessByFullPath(path2);
        }

        /// <summary>
        /// 启动Listener相关进程
        /// </summary>
        public void StartListenerProcess()
        {
            string dir = Path.GetDirectoryName(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location));
            string path1 = Path.Combine(dir, "Listener", "SolidWorksListener.exe");
            if (File.Exists(path1))
            {
                ProcessStartInfo info = new ProcessStartInfo
                {
                    FileName = path1,
                    WorkingDirectory = Path.GetDirectoryName(path1)
                };

                new Process
                {
                    StartInfo = info
                }.Start();
            }
        }

        public void Init()
        {
            label.Content = "准备更新程序...";
            bar.IsIndeterminate = true;
        }

        /// <summary>
        /// 初始化下载文件夹
        /// </summary>
        public void InitDownloadDir()
        {
            try
            {
                string tempDir = "temp";
                string downloadDir = "download";
                // 创建临时文件夹
                TempDir = $"{CurrentPath.FullName}{Path.DirectorySeparatorChar}{tempDir}";
                if (!Directory.Exists(TempDir))
                {
                    Directory.CreateDirectory(TempDir);
                }
                // 创建临时文件夹下的下载文件夹
                DownloadDir = $"{TempDir}{Path.DirectorySeparatorChar}{downloadDir}";
                if (!Directory.Exists(DownloadDir))
                {
                    Directory.CreateDirectory(DownloadDir);
                }
            }
            catch (Exception e)
            {
                Logger.Error("创建下载文件夹失败！异常：{0}", e);
                MessageBox.Show("创建下载文件夹失败！请重试", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                Environment.Exit(1);
            }
        }

        public void InitUnZipDir()
        {
            try
            {
                string tempDir = "temp";
                string unzipDir = "unzip";
                // 创建临时文件夹
                TempDir = $"{CurrentPath.FullName}{Path.DirectorySeparatorChar}{tempDir}";
                if (!Directory.Exists(TempDir))
                {
                    Directory.CreateDirectory(TempDir);
                }
                // 创建临时文件夹下的下载文件夹
                UnZipDir = $"{TempDir}{Path.DirectorySeparatorChar}{unzipDir}";
                if (!Directory.Exists(UnZipDir))
                {
                    Directory.CreateDirectory(UnZipDir);
                }
            }
            catch (Exception e)
            {
                Logger.Error("创建临时解压文件夹失败！异常：{0}", e);
                MessageBox.Show("创建临时解压文件夹失败！请重试", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                Environment.Exit(1);
            }
        }

        /// <summary>
        /// 先检查更新
        /// </summary>
        public void CheckPluginUpdate()
        {
            label.Content = "检查更新...";
            bar.IsIndeterminate = true;
            try
            {
                Dictionary<string, object> datas = new Dictionary<string, object>
                {
                    {
                        "params", new List<Dictionary<string, string>>
                        {
                           new Dictionary<string, string>
                           {
                               {"appId", AppId},
                               {"currentVersion", CurrentVersion},
                           }
                        }
                    }
                };
                Result<List<PluginInfo>> result =
                   HttpUtil.GetClient().PostSyncAction<List<PluginInfo>>(datas, "plugin/openApi/checkUpdate");
                List<PluginInfo> updates = result.HandleResult();
                if (updates == null || updates.Count <= 0)
                {
                    label.Content = "当前为最新版本！";
                    bar.IsIndeterminate = false;
                    return;
                }
                DownloadReleasePlugin(updates);
            }
            catch (Exception e)
            {
                Logger.Error("检查更新错误！异常：{0}", e);
                MessageBox.Show("检查更新错误！请重试", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                label.Content = "检查更新错误！请重试";
                bar.IsIndeterminate = false;
            }
        }

        /// <summary>
        /// 如果有需要更新的插件，就下载
        /// </summary>
        /// <param name="updates">需要更新的插件信息</param>
        private async void DownloadReleasePlugin(List<PluginInfo> updates)
        {
            InitDownloadDir();
            label.Content = "下载更新文件中，请勿关闭程序...";
            PluginInfo update = updates[0];
            try
            {
                string localFilePath = await HttpUtil.GetClient().GetDownload($"plugin/openApi/downloadReleasePlugin/{update.id}", DownloadDir, "Latest");
                UnZipAndUpdateFile(localFilePath);
            }
            catch (Exception e)
            {
                Logger.Error("下载更新文件错误！异常：{0}", e);
                MessageBox.Show("下载更新文件错误！请重试", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                label.Content = "下载更新文件错误！请重试";
                bar.IsIndeterminate = false;
            }
        }

        /// <summary>
        /// 下载压缩包后，解压缩并替换插件文件
        /// </summary>
        /// <param name="localFilePath">下载的zip路径</param>
        private async void UnZipAndUpdateFile(string localFilePath)
        {
            if (Path.GetExtension(localFilePath).ToLower() != ".zip")
            {
                return;
            }
            label.Content = "下载完成，解压中，请勿关闭程序...";
            // 临时解压目录，防止解压出错
            InitUnZipDir();
            // kill掉监听程序，避免文件占用
            KillListenerProcess();
            // 等待一秒释放exe占用
            Thread.Sleep(1000);

            // 插件文件夹 默认在 AutoUpdater.exe 的上级目录中
            string pluginDir = new DirectoryInfo(TempDir).Parent.Parent.FullName;
            using (ZipInputStream zipIn = new ZipInputStream(File.Open(localFilePath, FileMode.Open)))
            {
                ZipEntry zipEntry;
                while ((zipEntry = zipIn.GetNextEntry()) != null)
                {
                    string zipFileName = zipEntry.Name,
                        targetFileName;
                    zipFileName = zipFileName.Replace("AutoUpdater/", "WaitingUpdate/");
                    targetFileName = Path.Combine(pluginDir, zipFileName);
                    if (zipEntry.IsDirectory)
                    {
                        if (!Directory.Exists(targetFileName))
                        {
                            Directory.CreateDirectory(targetFileName);
                        }
                    }
                    else
                    {
                        using (FileStream fs = new FileStream(targetFileName, FileMode.Create))
                        {
                            byte[] buffer = new byte[1024];
                            int readLength = 0;
                            int length;
                            while ((length = await zipIn.ReadAsync(buffer, 0, buffer.Length)) != 0)
                            {
                                readLength += length;
                                fs.Write(buffer, 0, length);
                            }
                        }
                    }
                }
            }
            DoFinished();
        }

        private void DoFinished()
        {
            // 启动监听进程
            StartListenerProcess();
            label.Content = "更新完成";
            bar.IsIndeterminate = false;
            if (SwAppPath != null)
            {
                MessageBoxResult mr = MessageBox.Show("更新完成，是否启动SolidWorks？", "提示", MessageBoxButton.OKCancel, MessageBoxImage.Question);
                if (mr == MessageBoxResult.OK)
                {
                    Process swProcess = new Process
                    {
                        StartInfo = new ProcessStartInfo
                        {
                            FileName = SwAppPath
                        }
                    };
                    swProcess.Start();

                }
            }
            Environment.Exit(0);
        }

        private void GetCurrentVersion()
        {
            Thread.Sleep(1000);
            try
            {
                var data = VersionUtil.GetRegPluginVersion();
                this.AppId = data[VersionUtil.APPID_KEY];
                this.CurrentVersion = data[VersionUtil.VERSION_KEY];
            }
            catch (NoSoftwareKeyException e)
            {
                Logger.Error("Get plugin version failed,SwPlugin software reg not found.", e);
                MessageBox.Show("获取插件当前版本失败！请打开插件重试");
                Environment.Exit(1);
            }
            catch (Exception e)
            {
                Logger.Error("Get plugin version failed.", e);
                MessageBox.Show("获取插件当前版本失败！请重试");
                Environment.Exit(1);
            }
        }

        private void Close_SwMainProcess()
        {
            try
            {
                Process swMainProcess = Process.GetProcessById(SwMainProcessId);
                if (swMainProcess != null)
                {
                    // 获取 SW 路径
                    SwAppPath = swMainProcess.MainModule.FileName;
                    swMainProcess.EnableRaisingEvents = true;
                    swMainProcess.Exited += new EventHandler(SwMainProcessExited);
                    if (!swMainProcess.CloseMainWindow())
                    {
                        MessageBoxResult mr = MessageBox.Show("不能关闭SolidWorks主窗口！请手动退出SolidWorks后点击确认按钮，或点击取消退出更新程序",
                     "错误", MessageBoxButton.OKCancel, MessageBoxImage.Error);
                        if (mr == MessageBoxResult.OK)
                        {
                            Thread.Sleep(1000);
                            Close_SwMainProcess();
                        }
                        Environment.Exit(1);
                    }
                }
            }
            catch (Exception ex)
            {
                //Dispatcher.Invoke(new Action(delegate
                //{
                //    SwMainProcessId = -1;
                //    // 从exe文件中获取本地插件版本
                //    GetCurrentVersion();
                //    // 检查插件的更新
                //    CheckPluginUpdate();
                //}));
                Logger.Error("不能关闭 SolidWorks主窗口！异常：{0}", ex);
                MessageBoxResult mr = MessageBox.Show("不能关闭SolidWorks主窗口！请手动退出SolidWorks后点击确认按钮，或点击取消退出更新程序",
                    "错误", MessageBoxButton.OKCancel, MessageBoxImage.Error);
                if (mr == MessageBoxResult.OK)
                {
                    Thread.Sleep(1000);
                    Close_SwMainProcess();
                }
                Environment.Exit(1);
            }
        }

        void SwMainProcessExited(object sender, object e)
        {
            Dispatcher.Invoke(new Action(delegate
            {
                SwMainProcessId = -1;
                // 从exe文件中获取本地插件版本
                GetCurrentVersion();
                // 检查插件的更新
                CheckPluginUpdate();
            }));
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            CheckPluginUpdate();
        }
    }
}