using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
using System.IO;
using System.Threading;

using HXX.Scanner.Common;

namespace HXX.Scanner.UpdateStarter
{
    class Program
    {
        /// <summary>
        /// 程序启动后，复制升级文件到外部，启动外部文件并关闭自身
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {
            try
            {
                if (System.AppDomain.CurrentDomain.BaseDirectory.Contains("updateTemp"))
                {
                    Thread.Sleep(1000);
                    int count = 0;
                    bool done = true;

                    while (find_process())
                    {
                        Thread.Sleep(100);
                        count++;

                        if (count > 50)
                        {
                            LogManager.WriteLog("更新失败，原进程无法结束");
                            done = false;
                            break;
                        }
                    }

                    if (done)
                    {
                        var from = System.AppDomain.CurrentDomain.BaseDirectory;

                        if (from.EndsWith(@"\"))
                        {
                            from = from.Substring(0, from.Length - 1);
                        }

                        var to = Directory.GetParent(from).FullName;
                        var file = to + @"\" + "HXXScannerClient.exe";

                        CopyDirectory(from, to);

                        Process proc = new Process();
                        proc.StartInfo.FileName = file;
                        proc.Start();
                    }
                }
            }
            catch (Exception ee)
            {
                LogManager.WriteLog(ee);
            }
        }

        /// <summary>
        /// 杀掉主程序
        /// </summary>
        private static void kill_process()
        {
            var pp = Process.GetProcesses();
            var count = 0;

            foreach (var p in pp)
            {
                if (p.ProcessName.Contains("HXXScannerClient"))
                {
                    count++;
                    p.Kill();
                }
            }
        }

        /// <summary>
        /// 寻找主程序
        /// </summary>
        /// <returns></returns>
        private static bool find_process()
        {
            var pp = Process.GetProcesses();
            var count = 0;

            foreach (var p in pp)
            {
                if (p.ProcessName.Contains("HXXScannerClient"))
                {
                    count++;
                }
            }

            if (count > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        /// <summary>
        /// 拷贝目录
        /// </summary>
        /// <param name="srcDir"></param>
        /// <param name="tgtDir"></param>
        static void CopyDirectory(string srcDir, string tgtDir)
        {
            DirectoryInfo source = new DirectoryInfo(srcDir);
            DirectoryInfo target = new DirectoryInfo(tgtDir);

            if (target.FullName.StartsWith(source.FullName, StringComparison.CurrentCultureIgnoreCase))
            {
                throw new Exception("父目录不能拷贝到子目录！");
            }

            if (!source.Exists)
            {
                return;
            }

            if (!target.Exists)
            {
                target.Create();
            }

            FileInfo[] files = source.GetFiles();

            for (int i = 0; i < files.Length; i++)
            {
                if (files[i].FullName.Contains("updateFile"))
                {
                    continue;
                }

                File.Copy(files[i].FullName, target.FullName + @"\" + files[i].Name, true);
            }

            DirectoryInfo[] dirs = source.GetDirectories();

            for (int j = 0; j < dirs.Length; j++)
            {
                CopyDirectory(dirs[j].FullName, target.FullName + @"\" + dirs[j].Name);
            }
        }
    }
}