using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Xml.Linq;

namespace prBrowser.Weblogic
{
	public class FTPHelper
	{
		public string currentPath = "";

		public string serverPath = "";

		public string serverFTPName = "RKFTP";

		public string serverFTPPassword = "pryk@2020";

		public string ftpDefaultFolder = "browser";

		public string DownLoad(string filePath, string fileName, string ftpPath, string ftpUserName, string ftpPassWord)
		{
			try
			{
				if (!Directory.Exists(filePath))
				{
					Directory.CreateDirectory(filePath);
				}
				FileStream outputStream = new FileStream(filePath + fileName, FileMode.Create);
				FtpWebRequest reqFTP = (FtpWebRequest)WebRequest.Create(new Uri(ftpPath + fileName));
				reqFTP.Method = "RETR";
				reqFTP.Credentials = new NetworkCredential(ftpUserName, ftpPassWord);
				reqFTP.UseBinary = true;
				FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse();
				Stream ftpStream = response.GetResponseStream();
				long cl = response.ContentLength;
				int bufferSize = 2048;
				byte[] buffer = new byte[bufferSize];
				for (int readCount = ftpStream.Read(buffer, 0, bufferSize); readCount > 0; readCount = ftpStream.Read(buffer, 0, bufferSize))
				{
					outputStream.Write(buffer, 0, readCount);
				}
				ftpStream.Close();
				outputStream.Close();
				response.Close();
				reqFTP = null;
				return "0";
			}
			catch (Exception ex)
			{
				return ex.Message;
			}
		}

		public string getUpdateList()
		{
			string message = "0";
			try
			{
				string uri = serverPath + ftpDefaultFolder + "/UpdateList/";
				FtpWebRequest reqFTP = (FtpWebRequest)WebRequest.Create(new Uri(uri));
				reqFTP.Credentials = new NetworkCredential(serverFTPName, serverFTPPassword);
				reqFTP.Method = "LIST";
				WebResponse response = reqFTP.GetResponse();
				StreamReader reader = new StreamReader(response.GetResponseStream());
				for (string line = reader.ReadLine(); line != null; line = reader.ReadLine())
				{
					if (!line.Contains("<DIR>"))
					{
						string msg = line.Substring(39).Trim();
						string rtn = DownLoad(currentPath + "UpdateListServer\\", msg, uri, serverFTPName, serverFTPPassword);
						if (rtn != "0")
						{
							message = rtn;
							break;
						}
					}
				}
				reader.Close();
				response.Close();
			}
			catch (Exception ex)
			{
				message = ex.Message;
			}
			return message;
		}

		public int CheckUpdate()
		{
			currentPath = AppDomain.CurrentDomain.BaseDirectory;
			serverPath = getXMLValue("prBrowser.exe.config", "UpdateUrl");
			int checkFlag = 0;
			string updateListMsg = getUpdateList();
			if (updateListMsg != "0")
			{
				return checkFlag;
			}
			DirectoryInfo dirRoot = new DirectoryInfo(currentPath + "UpdateList\\");
			string latestFileName = "";
			FileInfo[] files = dirRoot.GetFiles();
			foreach (FileInfo f in files)
			{
				latestFileName = f.Name;
			}
			DirectoryInfo dirRootServer = new DirectoryInfo(currentPath + "UpdateListServer\\");
			string latestFileNameServer = "";
			FileInfo[] files2 = dirRootServer.GetFiles();
			foreach (FileInfo f2 in files2)
			{
				latestFileNameServer = f2.Name;
			}
			if (latestFileNameServer != latestFileName)
			{
				checkFlag = 1;
			}
			delUpdateList();
			return checkFlag;
		}

		public void delUpdateList()
		{
			DirectoryInfo dirObj = new DirectoryInfo(currentPath + "UpdateListServer\\");
			dirObj.Delete(recursive: true);
		}

		private string getXMLValue(string path, string attr)
		{
			string xmlValue = "";
			XDocument document = XDocument.Load(path);
			XElement root = document.Root;
			XElement settingEle = root.Element("appSettings");
			IEnumerable<XElement> enumerable = settingEle.Elements();
			foreach (XElement item in enumerable)
			{
				if (item.Attribute("key").Value == attr)
				{
					xmlValue = item.Attribute("value").Value;
				}
			}
			return xmlValue;
		}

		public void ExecuteAsAdmin(string fileName)
		{
			Process proc = new Process();
			proc.StartInfo.FileName = fileName;
			proc.StartInfo.UseShellExecute = true;
			proc.StartInfo.Verb = "runas";
			proc.Start();
		}
	}
}