using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Threading;
using HelperDB;
using System.Threading.Tasks;
using AIMSExtension;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Reflection;
using System.IO;
using System.Xml.Linq;

namespace AIMS
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main(string[] args)
        {
            if (PublicMethod.FindProcess("AIMSAutoUpdate"))
            {
                return;
            }
            BindExceptionHandler();
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            //Process instance = RunningInstance();
            //if (instance == null)
            //{ 
            UpdateProgram(args);
            Task.Factory.StartNew(() => { PreLoad(); });
            Application.Run(new FormLogin());
            //}
            //else
            //{
            //    /*1.2 已经有一个实例在运行*/
            //    HandleRunningInstance(instance);
            //}
        } 
        static void PreLoad()
        {
            string msg = DCSoft.Writer.Controls.WriterControl.CheckSystemEnvironment(false);
            if (msg != null)
            {
                MessageBox.Show(null, msg, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
            // 预先初始化一些数据
            DCSoft.Writer.WriterAppHost.PreloadSystem();
            DCSoft.Writer.Controls.WriterControl.StaticSetRegisterCode(AIMSExtension.PublicMethod.Decrypt(Properties.Resources.C));
        }

        static void UpdateProgram(string[] args)
        {
            try
            {
                //服务器版本号
                PublicMethod.NowVersion = PublicMethod.GetVersion();
                string localXmlFile = Application.StartupPath + "\\UpdateList.xml";
                if (!File.Exists(localXmlFile)) return;
                //读xml版本号
                XElement xe = XElement.Load(localXmlFile);
                string FtpAddress = xe.Element("FtpAddress").Value;
                string User = xe.Element("User").Value;
                string PassWord = xe.Element("PassWord").Value;
                string SysName = xe.Element("SysName").Value;
                string serverXmlFile = string.Empty;
                Version nowvs = new Version(xe.Element("Version").Value);
                Version vs = new Version(PublicMethod.NowVersion);

                if (nowvs.CompareTo(vs) == 0) return;
                try
                {
                    //获取服务器地址
                    string UpdaterUrl = FtpAddress + "//" + "UpdateList.xml";
                    //与服务器连接,下载更新配置文件
                    FTPTransmission.download(localXmlFile, UpdaterUrl, User, PassWord);
                    Process sprs = new Process();
                    sprs.StartInfo.FileName = Application.StartupPath + "\\AIMSAutoUpdate.exe";
                    sprs.StartInfo.Arguments = SysName;
                    sprs.Start();
                }
                catch (Exception)
                {
                    return;
                }
            }
            catch
            {
                //MessageBox.Show("与服务器连接失败,操作超时!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
        }
        /// 绑定程序中的异常处理
        /// </summary>
        static void BindExceptionHandler()
        {
            //设置应用程序处理异常方式：ThreadException处理
            Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
            //处理UI线程异常
            //Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
            //处理未捕获的异常
            AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);
        }

        static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            try
            {
                MessageBox.Show(((Exception)e.ExceptionObject).Message + "\r\n" + ((Exception)e.ExceptionObject).StackTrace, "系统信息");
                AIMSExtension.PublicMethod.WriteLog((Exception)e.ExceptionObject);
            }
            catch
            {
                Application.Exit();
            }
        }

        static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
        {
            try
            {
                MessageBox.Show(e.Exception.Message + "\r\n" + e.Exception.StackTrace, "系统信息");
                AIMSExtension.PublicMethod.WriteLog(e.Exception);
            }
            catch
            {
                Application.Exit();
            }
        }

        #region 确保程序只运行一个实例
        private static Process RunningInstance()
        {
            Process current = Process.GetCurrentProcess();
            Process[] processes = Process.GetProcessesByName(current.ProcessName);
            //遍历与当前进程名称相同的进程列表
            foreach (Process process in processes)
            {
                //如果实例已经存在则忽略当前进程
                if (process.Id != current.Id)
                {
                    //保证要打开的进程同已经存在的进程来自同一文件路径
                    if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
                    {
                        //返回已经存在的进程
                        return process;
                    }
                }
            }
            return null;
        }
        private static void HandleRunningInstance(Process instance)
        {
            ShowWindowAsync(instance.MainWindowHandle, 4); //调用api函数，正常显示窗口
            SetForegroundWindow(instance.MainWindowHandle); //将窗口放置最前端

        }
        [DllImport("User32.dll")]
        private static extern bool ShowWindowAsync(System.IntPtr hWnd, int cmdShow);
        [DllImport("User32.dll")]
        private static extern bool SetForegroundWindow(System.IntPtr hWnd);
        #endregion
    }
}