import java.io.*;
import java.net.*;
import java.awt.*;
 // ---------------------------------------------- 
 // This thread reads in input stream from a socket and 
 // appends the output to a TextArea object
class DisplayThread extends Thread {    
   TextArea m_text; 
   BufferedReader inChat = null;

    DisplayThread (TextArea text, BufferedReader in) 
    { 
       m_text =text;
       inChat = in; 
    }

    public void run() {
       System.out.println("Start DisplayThread ");
       String str;
       
       try {
               while ((str = inChat.readLine()) != null) 
               {
                       if (str.length() > 0)
                       {
                           m_text.append(str);
                           m_text.append("\n");
                       }
               }   
       }
       catch (IOException e)
       {
           System.out.println("inChat received an IOException: "+
                   e.getMessage());
           e.printStackTrace();
       }          

       System.out.println("Display Thread Finishing");
    } 
} 
// ----------------------------------------- 


public class ChatClient extends Frame{
 TextArea tArea=new TextArea("",15,80,TextArea.SCROLLBARS_BOTH);
ChatClient(){
       add(tArea);
}

    public static void main(String[] args) throws IOException {
        ChatClient myFrame=new ChatClient();
        Socket chatSocket = null;
        PrintWriter outChat = null;
        BufferedReader inChat = null;
        int port =4444;
        InetAddress localAddr = InetAddress.getLocalHost();
        DisplayThread myReader;
        MyInput inKeyboard = new MyInput();
        String str;

        
        System.out.println("Your Local Host="+localAddr);
        // 
        // The default connection is to your local host and port 4444
        // If you want something different, the first parameter is the 
        // Ip Address of the desired server, the second parameter is the
        // port number.

        // For example:
        // java ChatClient     ---> connects to your local host and port 4444
        // java ChatClient 163.215.77.8  connects to the specified server, port 4444
        // java ChatClient 163.215.77.8  8000 connects to port 8000 on server
        //                               163.215.77.8

        try
           {
               if (args.length > 1)
                       port = Integer.parseInt(args[1]);       
           }
            catch (ArithmeticException e)
           {
               System.out.println("Second argument is not an integer");
           }


        try 
            {
            if (args.length == 0)
               chatSocket = new Socket(localAddr, port);
             else
               chatSocket = new Socket(args[0], port);
               
       // Create a PrintWriter object for socket output

            outChat = new PrintWriter(
               chatSocket.getOutputStream(), true);

       // Create a BufferedReader object for socket input

            inChat = new BufferedReader(
               new InputStreamReader(
                       chatSocket.getInputStream()));
           } 
            catch (UnknownHostException e) {
               System.err.println("Don't know about host: " + localAddr);
               System.exit(1);
           } catch (IOException e) {
               System.err.println("Couldn't get I/O for the connection to: " +
                    localAddr + " message : " + e.getMessage());
               e.printStackTrace();
               System.exit(1);
           }

        myReader = new DisplayThread(myFrame.tArea, inChat);
        myReader.start();

// Must resize the frame before it can be shown
       myFrame.setSize(300, 300);
// Make the frame appear on the screen
        myFrame.show();

        for (;;) {
               str = inKeyboard.get();              
               if (str == null)
                       break;
               if (str.equals("####"))
                   break;
               System.out.println(str);
               if (myReader.isAlive())
                  outChat.println(str); 
               else {
                   System.out.println("Chat reader died ... probably the server is down");
                   break;
               }     
         } 


       System.out.println("Terminating"); 

       outChat.close();
       inChat.close();
       chatSocket.close();
       System.exit(0); 

    }
}