using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.IO;
using System.Xml;
using System.Diagnostics;

namespace Cyberpipe
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            string localConfigPath = Application.StartupPath + "/Config.xml";

            //获取程序及版本信息
            string currentVersionCode = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
            //获取文件版本信息
            FileVersionInfo myFileVersion = FileVersionInfo.GetVersionInfo(System.Windows.Forms.Application.ExecutablePath);
            string str = myFileVersion.FileVersion;

            string configUrl = getProgramUrl(localConfigPath, "configurl");
            if (configUrl != "")
            {
                String newVersionCode = getVersionCode(configUrl, currentVersionCode);
                if (newVersionCode != currentVersionCode)
                {
                    if (MessageBox.Show("检测到新版本，是否立即更新？", "智慧管网太湖新城规划分析系统", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                    {
                        string programUrl = getProgramUrl(localConfigPath, "programurl");
                        if (programUrl != "")
                        {
                            FrmDownloadProgress frmdownload = FrmDownloadProgress.getForm(programUrl);
                            return;
                        }
                    }
                    else
                    {

                    }
                }
            }
            
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            FrmLogin frm = new FrmLogin();
            if (frm.ShowDialog() == DialogResult.OK)
            {
                Application.Run(new MainFrm());
            }
        }

        //获取新版本程序的路径
        private static string getProgramUrl(string fileName, string nodeName)
        {
            string url = "";
            try
            {
                XmlTextReader xmlReader = new XmlTextReader(fileName);
                while (xmlReader.Read())
                {
                    if (xmlReader.Name == nodeName)
                    {
                        url = xmlReader.ReadElementContentAsString();
                        break;
                    }
                }
                xmlReader.Close();
            }
            catch (Exception e)
            {
                url = "";
            }
            return url;
        }

        //获取版本号
        private static string getVersionCode(string fileName, string currentVersionCode)
        {
            string versionCode="";
            try
            {
                XmlTextReader xmlReader = new XmlTextReader(fileName);
                while (xmlReader.Read())
                {
                    if (xmlReader.Name == "versioncode")
                    {
                        versionCode = xmlReader.ReadElementContentAsString();
                        break;
                    }
                }
                xmlReader.Close();


            }
            catch (Exception e)
            {
                versionCode = currentVersionCode;
                return versionCode;
            }
            return versionCode;
        }


    }
}