import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;


public class KlientInterface extends JFrame {
	private JTextField prata;
	private JTextArea meddelande;
	private JLabel status;
	private ReadStream in;
	private DataOutputStream out;
	private Socket ksocket;
	
	public KlientInterface(String[] args){
	
	super("Chat-Klient");
	
	String host = "127.0.0.1";
	int port = 2000;

	 if (args.length==1)
	 host=args[0];
      else if (args.length==2){
	 host=args[0];
	 int portnr=Integer.parseInt(args[1]);
	 if (portnr>1023 && portnr<65536){
	    port=portnr;
	 }
      }	
	 addWindowListener(new Exit()); 
	addKeyListener(new EnterLyssnare());
	JPanel ovre=new JPanel(new GridLayout(2,4));
	ovre.add(prata=new JTextField());
	getContentPane().add(ovre, BorderLayout.NORTH);
	
	meddelande=new JTextArea();
	JScrollPane scroll=new JScrollPane(meddelande);
        getContentPane().add(scroll, BorderLayout.CENTER);
	
	status = new JLabel();
	JPanel statusBar = new JPanel();
	statusBar.add(status);
	getContentPane().add(statusBar, BorderLayout.SOUTH);
	
		
	setSize(500,400);
	
	show();	
	connect(host,port);	
	}
	
protected void connect(String url, int port){
	setMedd(url);
	try{		
	ksocket = new Socket(url,port);
	out = new DataOutputStream(ksocket.getOutputStream());
	in = new ReadStream(new BufferedReader(new InputStreamReader(ksocket.getInputStream())), this);	
	in.start();	
		
		
	}catch(UnknownHostException uhe){
	System.out.println("Host okänd!");
	System.exit(0);
      }catch(IOException ioe){
	 System.out.println("Servern nere!");
	 System.exit(0);
      }
	setMedd(url); 
}


protected void logg(String message){
      if(!message.endsWith("\n"))
	 message=message+"\n";
      meddelande.append(message);
      meddelande.setCaretPosition(meddelande.getText().length());
   }

protected void setMedd(String mess){
	status.setText("Connected to " + mess + "\n");
	
	}
protected void sendStream(String message){
      try{
	 if(message.length()>0){
	    out.writeBytes(message+"\n");
	 }
      }catch(IOException ioe){
	 setMedd("Server did not listen to message!");
      }
   }
 
	
public class ReadStream extends Thread {

      private KlientInterface klient;
      private BufferedReader input;
      private String line="";
      private boolean online = true;
	
 
      public ReadStream(BufferedReader inputStream, KlientInterface klient){
		 this.klient=klient;
		 input=inputStream;
      }
     
     

      
      public void run(){
	 while(online){
	    try{
	       sleep(1000);
	       if((line=input.readLine())!=null){
		  klient.logg(line+"\n");
	       }
	    }catch(InterruptedException e){
	    }catch(IOException ioe){
	       klient.setMedd("not connected");
	       klient.setMedd("Server offline");
	    }
	 }
      }
   }	
	
public class EnterLyssnare extends KeyAdapter{
	public void keyPressed(KeyEvent e){
	 int key = e.getKeyCode();
	 if (key==e.VK_ENTER){
	    if(prata.hasFocus()){
	       sendStream(prata.getText().trim());
	       prata.setText("");
	       prata.requestFocus();
	}
      }
   }
}
class Exit extends WindowAdapter{
      public void windowClosing(WindowEvent e){
	System.exit(0);
      }
   }

	public static void main(String[] args){
		new KlientInterface(args);
	}	
	
		
}