using ICSharpCode.SharpZipLib.Zip;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WDProduceToolUpdate
{
    public partial class frmProduceUpdate : Form
    {
       
        public frmProduceUpdate()
        {
            InitializeComponent();
        }
        WdProduceToolVersion version = null;
        string updateFileName = string.Empty;
        private void update_Load(object sender, EventArgs e)
        {
            updateprocess();
        }
        private void updateprocess()
        {
            try
            {
                
                string versionStr = JsonFileHelper.GetJsonFile(AppDomain.CurrentDomain.BaseDirectory + "version.json");
                if (string.IsNullOrEmpty(versionStr))
                {
                    string message = string.Format("获取更新文件失败！");
                    if (DialogResult.OK == MessageBox.Show(message, "系统错误", MessageBoxButtons.OK))
                    {
                        Application.Exit();
                    }
                }
                if (!Directory.Exists(Application.StartupPath + @"update"))
                {
                    Directory.CreateDirectory(Application.StartupPath + @"update");
                }
                version = JsonConvert.DeserializeObject<WdProduceToolVersion>(versionStr);
                string[] filePaths = version.update_file_path.Split(@"/");
                updateFileName= filePaths[filePaths.Length - 1];
                WebClient wc = new WebClient();
                wc.DownloadProgressChanged += wc_DownloadProgressChanged;
                wc.DownloadFileAsync(new Uri(version.server_url + @"/" + version.update_file_path), Application.StartupPath + @"update\"+ updateFileName);
            }
            catch (Exception er)
            {
                label1.Text = "下载失败：" + er.Message;
            }
        }

        private void wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            Action act = () =>
            {
                this.progressBar1.Value = e.ProgressPercentage;
                this.label1.Text = "正在下载...";
                //this.label1.Text = e.ProgressPercentage + "%";

            };
            this.Invoke(act);

            if (e.ProgressPercentage == 100)
            {
                //下载完成之后开始覆盖
                this.label1.Text = "正在解压...";

                try
                {
                    var result = UnZip(Application.StartupPath + @"update\"+ updateFileName, Application.StartupPath,"");
                    //var result = unZip(Application.StartupPath + "\\update.rar", @"..\LWH\");
                    if (result)
                    {
                        progressBar1.Value = 100;
                        this.label1.Text = "准备安装...";

                        this.label1.Text = "更新完成";
                        string versionStr = JsonFileHelper.GetJsonFile(AppDomain.CurrentDomain.BaseDirectory + "version.json");
                        version = JsonConvert.DeserializeObject<WdProduceToolVersion>(versionStr);
                        version.updated = true;
                        JsonFileHelper.WriteJsonFile(AppDomain.CurrentDomain.BaseDirectory + "version.json", JsonConvert.SerializeObject(version));
                        var mainFile = Application.StartupPath + "WDProduceTool.exe";//重新启动软件
                        Process p = new Process();
                        p.StartInfo.UseShellExecute = false;
                        p.StartInfo.RedirectStandardOutput = true;
                        p.StartInfo.FileName = mainFile;
                        p.StartInfo.CreateNoWindow = true;
                        p.Start();
                        this.Close();
                    }
                    else
                    {
                        MessageBox.Show("更新失败:" + result);
                        this.Close();
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "更新失败");
                    this.Close();
                }

            }
        }
        /// <summary>
        /// ZIP:解压一个zip文件
        /// add yuangang by 2016-06-13
        /// </summary>
        /// <param name="ZipFile">需要解压的Zip文件（绝对路径）</param>
        /// <param name="TargetDirectory">解压到的目录</param>
        /// <param name="Password">解压密码</param>
        /// <param name="OverWrite">是否覆盖已存在的文件</param>
        public bool UnZip(string ZipFile, string TargetDirectory, string Password, bool OverWrite = true)
        {
            //如果解压到的目录不存在，则报错
            if (!System.IO.Directory.Exists(TargetDirectory))
            {
                throw new System.IO.FileNotFoundException("指定的目录: " + TargetDirectory + " 不存在!");
            }
            //目录结尾
            if (!TargetDirectory.EndsWith("\\")) { TargetDirectory = TargetDirectory + "\\"; }

            using (ZipInputStream zipfiles = new ZipInputStream(File.OpenRead(ZipFile)))
            {
                zipfiles.Password = Password;
                ZipEntry theEntry;

                while ((theEntry = zipfiles.GetNextEntry()) != null)
                {
                    string directoryName = "";
                    string pathToZip = "";
                    pathToZip = theEntry.Name;

                    if (pathToZip != "")
                        directoryName = Path.GetDirectoryName(pathToZip) + "\\";

                    string fileName = Path.GetFileName(pathToZip);

                    Directory.CreateDirectory(TargetDirectory + directoryName);

                    if (fileName != "")
                    {
                        if ((File.Exists(TargetDirectory + directoryName + fileName) && OverWrite) || (!File.Exists(TargetDirectory + directoryName + fileName)))
                        {
                            using (FileStream streamWriter = File.Create(TargetDirectory + directoryName + fileName))
                            {
                                int size = 2048;
                                byte[] data = new byte[2048];
                                while (true)
                                {
                                    size = zipfiles.Read(data, 0, data.Length);

                                    if (size > 0)
                                        streamWriter.Write(data, 0, size);
                                    else
                                        break;
                                }
                                streamWriter.Close();
                            }
                        }
                    }
                }

                zipfiles.Close();
                return true;
            }
        }

    }
}