/*
      The Browser Snooper Client
            by Jim Mach
*/


import java.awt.*;
import java.applet.*;
import java.io.*;
import java.net.*;

import ErrorHandler;
import ClientInfo;



public class BrowserClient extends Applet implements Runnable 
{
   final int DEFAULT_PORT = 6780;
   final char COMM_DELIMETER = 144;
   final int APPLET_HEIGHT = 250;
   final int APPLET_WIDTH = 450;
   Thread browserclient_thread = null;
   ErrorHandler error = new ErrorHandler();
   ClientInfo client_info;

   boolean conn_flag = false;
   Socket conn = null;
   DataInputStream data_in;
   PrintStream data_out;

   TextArea ta_java;
   Button bt_ok;
   Label ll_java;
   Label ll_info;

/*
   static public void main(String[] args)
   {
      Frame f = new Frame("Browser Client");
      BrowserClient bc = new BrowserClient();
      bc.init();
      bc.start();

      f.add("Center", bc);
      f.resize(APPLET_WIDTH, APPLET_HEIGHT);
      f.show();
   }
*/

   public void init()
   {
      client_info = new ClientInfo();

      ConnectToHost();
      SendInfo();
      ReceiveInfo();
      CreateWindow();
      show();
   }


   public void destroy()
   {
      try { conn.close(); }
      catch(IOException e) {}
   }


   public void start()
   {
      if (browserclient_thread == null)
      {
         browserclient_thread = new Thread(this);
         browserclient_thread.start();
      }
   }


   public void stop()
   {
      if ((browserclient_thread != null) && (browserclient_thread.isAlive()))
      {
         browserclient_thread.stop();
         browserclient_thread = null;
      }
   }


   public void run()
   {
   }


   public boolean action(Event evt, Object arg) 
   {

      switch (evt.id)
      {
         case Event.ACTION_EVENT:
            if (evt.target instanceof Button)
            {
               if (evt.target == bt_ok)
               {
                  ta_java.insertText(client_info.FormatInfo('\n'), 0);
               }
            }
            break;

         default:
            break;
      }

      return true;
   }



   private void ConnectToHost()
   {
      String host_name = null;

      try {
         host_name = this.getCodeBase().getHost();
         if (host_name.length() != 0)
         {
//            conn = new Socket(host_name, DEFAULT_PORT);
//            data_in = new DataInputStream(conn.getInputStream());
//            data_out = new PrintStream(conn.getOutputStream());
            conn_flag = true;
         }
      }
      catch(IOException e) {error.ShowError(e, "Error in ConnectToHost() Socket");}
   }


   private void SendInfo()
   {
      client_info.GetInfo(conn_flag);
      if (conn != null)
      {
         try {data_out.println(client_info.FormatInfo(COMM_DELIMETER));}
         catch(IOException e) {}
      }
   }


   private void ReceiveInfo()
   {
      String response = null;

      if (conn != null)
      {
         try {
            response = data_in.readLine();
            conn.close();
         }
         catch(IOException e) {}
         client_info.UnFormatInfo(response, COMM_DELIMETER);
      }
   }



   private void CreateWindow()
   {
      setLayout(null);
      resize(insets().left + insets().right + APPLET_WIDTH, insets().top + insets().bottom + APPLET_HEIGHT);

      ll_info = new Label("Take a look at the info I (could) record about you");
      ll_info.setFont(new Font("Dialog", Font.BOLD, 12));
      add(ll_info);
      ll_info.reshape(insets().left + 10, insets().top + 10, 300, 20);

      ll_java = new Label("Java User Information:");
      ll_java.setFont(new Font("Dialog", Font.BOLD, 12));
      add(ll_java);
      ll_java.reshape(insets().left + 10, insets().top + 30, 200, 20);

      ta_java = new TextArea(200, 40);
      ta_java.setFont(new Font("Courier", Font.PLAIN, 12));
      add(ta_java);
      ta_java.reshape(insets().left + 10, insets().top + 50, 350, 100);

      bt_ok = new Button("OK");
      add(bt_ok);
      bt_ok.reshape(insets().left + 150, insets().top + 160, 60, 30);
   }
}