using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.IO;
using System.Net;

namespace WebChecker
{
	public partial class Form1 : Form
	{
		const int CHECK_PERIOD = 1000*30;

		WebBrowser wb = new WebBrowser();
		string url = "http://me.sayclub.com/profile/home/view/ban8";
		//string url = "http://me.sayclub.com/profile/home/view/tosvmfks53";
		Timer m_Timer = new Timer();

		int m_iReqCnt = 0;
		int m_iRespCnt = 0;

		DateTime m_LastCheckT;

		StreamWriter m_FileLog = new StreamWriter("WebChecker.log", true);

		WebClient client = new WebClient();

		public Form1()
		{
			InitializeComponent();

			notifyIcon1.Visible = false;

			tbURL.Text = url;

			m_Timer.Interval = 1000;
			m_Timer.Tick += new EventHandler(m_Timer_Tick);

			wb.ScriptErrorsSuppressed = true;
			wb.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(wb_DocumentCompleted);

			client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
			client.DownloadDataCompleted +=new DownloadDataCompletedEventHandler(client_DownloadDataCompleted);

			Log("=== App Launch ===");
		}

		private void Form1_Load(object sender, EventArgs e)
		{
			this.WindowState = FormWindowState.Minimized;
		}

		private void Form1_Shown(object sender, EventArgs e)
		{
			this.Hide();
		}

		void Alert(string message)
		{
			this.Show();
			this.TopMost = true;
			FlashWindow.Start(this);

			MessageBox.Show(this, message);
			FlashWindow.Stop(this);
		}

		void Log(string message)
		{
			Console.WriteLine("[" + DateTime.Now + "] " + message);
			m_FileLog.WriteLine("[" + DateTime.Now + "] " + message);
			m_FileLog.Flush();
		}

		private void Form1_FormClosing(object sender, FormClosingEventArgs e)
		{
			notifyIcon1.Visible = false;
			Log("=== App Closing ===");
			m_FileLog.Close();
		}

		void wb_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
		{
			if(e.Url.Host != wb.Url.Host)
				return;

			if((sender == wb) &&
				(wb.ReadyState == WebBrowserReadyState.Complete || wb.ReadyState == WebBrowserReadyState.Interactive))
			{
				lbStatus.Text = "상태 : 응답 받고 체크 중";
				m_iRespCnt++;
				lbRespCnt.Text = "응답 : " + m_iRespCnt;

				HtmlDocument doc = wb.Document;

				HtmlElement element = doc.GetElementById("sbPersonalInfo");
				if(element == null)
					return;
				element = element.Children[element.Children.Count-1];
				element = element.Children[0];
				element = element.GetElementsByTagName("IMG")[0];

				string attr = element.GetAttribute("src");

				if(attr.IndexOf("login") >= 0)
				{
					Process.Checked = false;
					Log(url + " checked");
					Alert("logged in");
				}

				lbStatus.Text = "상태 : 체크 완료";

				wb.Stop();
			}
		}

		void m_Timer_Tick(object sender, EventArgs e)
		{
			if(wb.IsBusy == false)
			{
				TimeSpan span = DateTime.Now-m_LastCheckT;
				if(span.TotalMilliseconds >= CHECK_PERIOD)
				{
					m_iReqCnt++;
					lbReqCnt.Text = "요청 : " + m_iReqCnt;
					lbStatus.Text = "상태 : 요청 중";
					wb.Navigate(url);

					m_LastCheckT = m_LastCheckT+TimeSpan.FromMilliseconds(CHECK_PERIOD);
				}
				else
				{
					lbStatus.Text = "상태 : 대기 (" + (int)(CHECK_PERIOD-span.TotalMilliseconds)/1000 + "초...)";
				}
			}
		}

		private void Process_CheckedChanged(object sender, EventArgs e)
		{
			if(Process.Checked == true)
			{
				m_LastCheckT = DateTime.Now - TimeSpan.FromMilliseconds(CHECK_PERIOD-1000);

				m_Timer.Start();
				Log(url + " check start");

				url = tbURL.Text;
				tbURL.Enabled = false;
			}
			else
			{
				m_iReqCnt = 0;
				m_iRespCnt = 0;
				lbReqCnt.Text = "요청 : 0";
				lbRespCnt.Text = "응답 : 0";
				lbStatus.Text = "상태 : 대기";

				m_Timer.Stop();
				Log(url + " check stop");

				tbURL.Enabled = true;
				if(wb.IsBusy == true)
					wb.Stop();
			}
		}

		private void Form1_Resize(object sender, EventArgs e)
		{
			if(this.WindowState == FormWindowState.Minimized)
			{
				notifyIcon1.Visible = true;
				this.Hide();
			}
			else if(this.WindowState == FormWindowState.Normal)
			{
				notifyIcon1.Visible = false;
				this.ShowInTaskbar = true;
			}
		}

		private void notifyIcon1_MouseClick(object sender, MouseEventArgs e)
		{
			this.Show();
			this.WindowState = FormWindowState.Normal;
		}

		private void btOpen_Click(object sender, EventArgs e)
		{
			try
			{
				System.Diagnostics.Process.Start(tbURL.Text);
			}
			catch(System.ComponentModel.Win32Exception noBrowser)
			{
				if(noBrowser.ErrorCode == -2147467259)
					MessageBox.Show(noBrowser.Message);
			}
			catch(System.Exception other)
			{
				MessageBox.Show(other.Message);
			}
		}

		private void button1_Click(object sender, EventArgs e)
		{
			//url = "http://main.com";
			url = tbURL.Text;
			client.DownloadDataAsync(new Uri(url));
		}

		void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
		{
			
		}

		void client_DownloadDataCompleted(object sender, DownloadDataCompletedEventArgs e)
		{
			string conType = client.ResponseHeaders["Content-Type"];
			int iPos = conType.IndexOf("charset");
			Encoding enc = Encoding.Default;
			if(iPos >= 0)
			{
				iPos = conType.IndexOf("=", iPos+"charset".Length);
				if(iPos >= 0)
				{
					string charset = conType.Substring(iPos+1);
					enc = Encoding.GetEncoding(charset);
				}
			}

			string contents = enc.GetString(e.Result);

			HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
			doc.LoadHtml(contents);


			HtmlAgilityPack.HtmlNode node = doc.DocumentNode.SelectSingleNode("//ul[@class='info']/li/img");
			HtmlAgilityPack.HtmlAttribute attr = node.Attributes["src"];

			string strInnerText = "";
			if(attr != null)
				strInnerText = attr.Value;	
		}
	}
}