using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;
using System.Threading;
using System.IO;
using System.Security.Cryptography;

using HXX.Scanner.Common;

namespace HXX.Scanner.Starter
{
    public partial class frmCheckUpdate : MainForm
    {
        public frmCheckUpdate()
        {
            InitializeComponent();
        }

        public frmCheckUpdate(entity_sub_upgrade_info info)
        {
            InitializeComponent();

            this.upgrade_info = info;
        }

        private entity_sub_upgrade_info upgrade_info;
        private string tempFolder = "";
        private string tempInstallFile = "";
        private string tempUnZipFolder = "";
        private string tempCopier = "";

        private void frmCheckUpdate_Load(object sender, EventArgs e)
        {
            try
            {
                if (upgrade_info.description == null)
                {
                    upgrade_info.description = string.Empty;
                }

                this.lbl_server_version.Text = "发现最新版本v" + upgrade_info.version;
                this.lbl_current_version.Text = "当前版本v" + upgrade_info.current_version;
                this.lblText.Text = upgrade_info.description.Replace("\\r\\n", "\r\n");

                if (this.upgrade_info.force == 1)
                {
                    this.btnDownload_Click(null, null);
                }
            }
            catch (Exception ee)
            {
                MessageBox.Show("发生错误");
                LogManager.WriteLog(ee);

                Thread.Sleep(1000);
                Environment.Exit(0);
            }
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            Process.Start("HXXScannerClient.exe");
            Environment.Exit(0);
        }

        private async void btnDownload_Click(object sender, EventArgs e)
        {
            try
            {
                this.pl_button.Visible = false;
                this.pl_download.Location = this.pl_button.Location;
                this.pl_download.Visible = true;

                if (checkFolder())
                {
                    if (await httpDownload(this.upgrade_info.downloadUrl, tempInstallFile, this.progressBar1))
                    {
                        //if (check_md5(tempInstallFile))
                        {
                            unzip();

                            Thread.Sleep(200);

                            if (File.Exists(tempCopier))
                            {
                                Process process = new Process();
                                ProcessStartInfo startInfo = new ProcessStartInfo();
                                startInfo.FileName = tempCopier;
                                //startInfo.Arguments = "";
                                startInfo.WorkingDirectory = tempUnZipFolder;
                                //startInfo.RedirectStandardError = true;
                                //startInfo.RedirectStandardInput = true;
                                //startInfo.RedirectStandardOutput = true;
                                startInfo.CreateNoWindow = true;
                                startInfo.UseShellExecute = false;

                                process.StartInfo = startInfo;
                                process.EnableRaisingEvents = false;

                                process.Start();
                            }
                            else
                            {
                                    var msg = "下载的升级文件已损坏";

                                    MessageBox.Show(msg);
                                    LogManager.WriteLog(msg);

                                    Environment.Exit(0);
                            }

                            //////Process.Start(tempInstallFile);
                            //////Environment.Exit(0);
                        }
                        //else
                        //{
                        //    var msg = "下载的升级文件已损坏";

                        //    MessageBox.Show(msg);
                        //    LogManager.WriteLog(msg);

                        //    Environment.Exit(0);
                        //}
                    }
                }
            }
            catch (Exception ee)
            {
                MessageBox.Show("发生错误");
                LogManager.WriteLog(ee);

                Environment.Exit(0);
            }
        }

        public async Task<bool> httpDownload(string URL, string filename, System.Windows.Forms.ProgressBar bar)
        {
            return await Task.Run(() =>
              {
                  int percent = 0;

                  try
                  {
                      System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL);
                      System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse();
                      long totalBytes = myrp.ContentLength;

                      System.IO.Stream st = myrp.GetResponseStream();
                      System.IO.Stream so = new System.IO.FileStream(filename, System.IO.FileMode.Create);
                      long totalDownloadedByte = 0;
                      byte[] by = new byte[2048];
                      int osize = st.Read(by, 0, (int)by.Length);

                      while (osize > 0)
                      {
                          totalDownloadedByte = osize + totalDownloadedByte;
                          //System.Windows.Forms.Application.DoEvents();
                          so.Write(by, 0, osize);

                          osize = st.Read(by, 0, (int)by.Length);

                          percent = (int)((float)totalDownloadedByte / (float)totalBytes * 100);

                          this.Invoke(new Action(() =>
                          {
                              bar.Value = percent;
                              this.lbl_progress.Text = "版本更新：" + percent.ToString() + "%";
                              //Application.DoEvents(); //必须加注这句代码，否则label1将因为循环执行太快而来不及显示信息
                              bar.PerformStep();
                          }));
                      }

                      so.Close();
                      st.Close();

                      return true;
                  }
                  catch (System.Exception ee)
                  {
                      this.Invoke(new Action(() =>
                      {
                          MessageBox.Show("发生错误");
                          LogManager.WriteLog(ee);

                          Thread.Sleep(1000);
                          Environment.Exit(0);
                      }));

                      return false;
                  }
              });
        }

        private bool checkFolder()
        {
            try
            {
                tempFolder = System.IO.Directory.GetCurrentDirectory() + @"\tempDownloading\";
                //tempFolder = @"c:\HXX\tempDownloading\";
                tempInstallFile = tempFolder + "tempInstallFile.zip";
                tempUnZipFolder = tempFolder + @"\unZipFolder\";
                tempCopier = tempUnZipFolder + "HXX.Scanner.Copier.exe";

                KillAllInstallAction();

                if (Directory.Exists(tempFolder))
                {
                    Directory.Delete(tempFolder, true);
                }

                Directory.CreateDirectory(tempFolder);

                return true;
            }
            catch (Exception ee)
            {
                MessageBox.Show("发生错误");
                LogManager.WriteLog(ee);
                return false;
            }
        }

        private void unzip()
        {
            if (!string.IsNullOrEmpty(tempInstallFile))
            {
                if (File.Exists(tempInstallFile))
                {
                    ZipManager.UnZip(tempInstallFile, tempUnZipFolder, "");
                }
            }            
        }

        private void KillAllInstallAction()
        {
            Process[] processes = Process.GetProcessesByName("tempInstallFile.tmp");

            foreach (var p in processes)
            {
                p.Kill();
                Thread.Sleep(200);
            }
        }

        private bool check_md5(string file)
        {
            if (upgrade_info.md5 == CalculateMD5Hash(file))
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        public string CalculateMD5Hash(string filePath)
        {
            using (var md5 = MD5.Create())
            {
                using (var stream = File.OpenRead(filePath))
                {
                    var hash = md5.ComputeHash(stream);
                    return BitConverter.ToString(hash).Replace("-", "").ToLowerInvariant();
                }
            }
        }

        private void roundButton1_MouseEnter(object sender, EventArgs e)
        {
            this.btnDownload.Size = new Size(this.btnDownload.Width + 2, this.btnDownload.Height + 2);
            this.btnDownload.Location = new Point(this.btnDownload.Location.X - 1, this.btnDownload.Location.Y - 1);
        }

        private void roundButton1_MouseLeave(object sender, EventArgs e)
        {
            this.btnDownload.Size = new Size(this.btnDownload.Width - 2, this.btnDownload.Height - 2);
            this.btnDownload.Location = new Point(this.btnDownload.Location.X + 1, this.btnDownload.Location.Y + 1);
        }

        private void btnCancel_MouseEnter(object sender, EventArgs e)
        {
            this.btnCancel.Size = new Size(this.btnCancel.Width + 2, this.btnCancel.Height + 2);
            this.btnCancel.Location = new Point(this.btnCancel.Location.X - 1, this.btnCancel.Location.Y - 1);
        }

        private void btnCancel_MouseLeave(object sender, EventArgs e)
        {
            this.btnCancel.Size = new Size(this.btnCancel.Width - 2, this.btnCancel.Height - 2);
            this.btnCancel.Location = new Point(this.btnCancel.Location.X + 1, this.btnCancel.Location.Y + 1);
        }

        private void lblText_Paint(object sender, PaintEventArgs e)
        {
            int LineDistance = 8;//行间距
            System.Windows.Forms.Label label = sender as System.Windows.Forms.Label;
            System.Drawing.Font drawFont = label.Font;
            label.AutoSize = false;
            SolidBrush drawBrush = new SolidBrush(label.ForeColor);
            Graphics g = e.Graphics;
            g.Clear(label.BackColor);
            StringFormat drawFormat = new StringFormat();
            string[] arrDrawString = label.Text.Split(new char[] { '\n' });

            int height = 0;
            foreach (string str in arrDrawString)
            {
                //文本的矩形区域大小
                SizeF textSize = g.MeasureString(str, label.Font);

                //计算行数
                int strLineCount = Convert.ToInt32(Math.Ceiling(textSize.Width / label.Width));


                height += Convert.ToInt16((textSize.Height + LineDistance) * strLineCount);
            }

            label.Height = height;   //计算调整后的高度
            float netTextPos_Y = 0;   // 下一行的位置
            foreach (string drawString in arrDrawString)
            {
                bool drawText = false;
                int strLenght = 1;   // 长度
                int startIndex = 0;  // 开始位置
                for (int i = 0; i < drawString.Length; i++, strLenght++)
                {
                    string subN = drawString.Substring(startIndex, strLenght);
                    if (startIndex + strLenght >= drawString.Length)
                    {
                        drawText = true;
                    }
                    else
                    {
                        string subN1 = drawString.Substring(startIndex, strLenght + 1);
                        if (g.MeasureString(subN, label.Font).Width <= label.Width && g.MeasureString(subN1, label.Font).Width > label.Width)
                        {
                            drawText = true;
                        }
                    }
                    if (drawText)
                    {
                        drawText = false;
                        strLenght = 0;
                        startIndex = i + 1;
                        SizeF textSize = g.MeasureString(subN, label.Font);
                        e.Graphics.DrawString(subN, drawFont, drawBrush, 0, netTextPos_Y, drawFormat);
                        netTextPos_Y = netTextPos_Y + textSize.Height + LineDistance;
                    }
                }
            }
        }
    }
}