using System;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Windows.Forms;
using DevComponents.DotNetBar;
using Microsoft.Win32;

namespace Cyberpipe
{
    public partial class FrmDownloadProgress : Office2007Form
    {
        string programUrl = "";
        //static FrmDownloadProgress frm = null;
        //public static FrmDownloadProgress getForm(string url)
        //{
        //    if (frm == null)
        //    {
        //        frm = new FrmDownloadProgress(url);
        //        frm.ShowDialog();
        //    }
        //    return frm;
        //}

        public FrmDownloadProgress(string url)
        {
            InitializeComponent();
            programUrl = url;
        }

        private void FrmDownloadProgress_FormClosing(object sender, FormClosingEventArgs e)
        {
            //frm = null;
        }

        private void FrmDownloadProgress_Load(object sender, EventArgs e)
        {
            updateVersion(programUrl);
        }

        //更新版本
        static string localPath = "";
        private void updateVersion(string programUrl)
        {
            try
            {
                string ent = "C:\\CyberPipe";
                if (!File.Exists(ent))
                {
                    Directory.CreateDirectory(ent);
                }
                localPath = ent + "\\" + Path.GetFileName(programUrl);
                //TODO LIST:判断文件是否存在，存在就删除
                delOldVersion(localPath);

                WebClient myWebClient = new WebClient();
                myWebClient.DownloadProgressChanged += myWebClient_DownloadProgressChanged;
                myWebClient.DownloadFileCompleted += myWebClient_DownloadFileCompleted;

                myWebClient.DownloadFileAsync(new Uri(programUrl), localPath);
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message);
            }
        }

        private void createFolder(String folerName)
        {
            if (!Directory.Exists(folerName))
            {
                Directory.CreateDirectory(folerName);
            }
        }

        private void delOldVersion(String fileName)
        {
          
            if (File.Exists(fileName))
            {
                File.Delete(fileName);
            }
        }

        void myWebClient_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
        {

            unstall();

            if (File.Exists(localPath))
            {
                Process.Start(localPath).WaitForExit();
            }

        }

        //下载进度è条?
        void myWebClient_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {

            float percentage = 0f;
            try
            {
                progressBarX1.Maximum = (int)e.TotalBytesToReceive;
                progressBarX1.Value = (int)e.BytesReceived;
                percentage = (e.BytesReceived / (float)e.TotalBytesToReceive) * 100;
            }
            catch
            {
                throw;
            }
            double totalSize = e.TotalBytesToReceive / (1024.0 * 1024.0);
            double currentSize = e.BytesReceived / (1024.0 * 1024.0);
            labelX1.Text = "已下载" + e.ProgressPercentage + "%" + "(" + Math.Round(currentSize, 1) + "M/" + Math.Round(totalSize, 1) + "M)";
            if (percentage == 100.0f)
            {
                //frm.Close();
            }

        }

        private void unstall()
        {
            try
            {
                if (getProductCode("Cyberpipe") == "")
                {
                    return;
                }
                String code = "/x {" + getProductCode("Cyberpipe") + "} /qr";
                String sysroot = Environment.SystemDirectory;
                Process.Start(sysroot + "\\msiexec.exe ", code).WaitForExit();
            }
            catch (Exception e)
            {
                MessageBox.Show("旧版本卸载失败！" + e.Message);
            }
        }

        private String getProductCode(String programName)
        {
            string productCode = "";

            // 如果是32位操作系统，（或者系统是64位，程序也是64位）
            string bit32 = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall";
            RegistryKey localMachine = Registry.LocalMachine;
            RegistryKey Uninstall = localMachine.OpenSubKey(bit32, true);

            foreach (string subkey in Uninstall.GetSubKeyNames())
            {
                RegistryKey productcode = Uninstall.OpenSubKey(subkey);
                try
                {
                    string displayname = productcode.GetValue("DisplayName").ToString();
                    if (displayname == programName)
                    {
                        string uninstallString = productcode.GetValue("UninstallString").ToString();

                        string[] strs = uninstallString.Split('{', '}');
                        productCode = strs[1];
                        return productCode;
                    }
                }
                catch
                {
                }
            }
            return productCode;
        }


    }
}