import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.rmi.*;

public class Client extends JFrame implements Runnable {
  RemoteServer remoteServer = null;
  Thread thread = new Thread(this);
  int xLim = 500, yLim = 500, rMax = 70;
  Vector ballsRaw = new Vector();

  public static void main(String[] args) {
   System.setSecurityManager(new RMISecurityManager());
   new Client(args[0]);
  }

  public Client(String host) {
    String url = "rmi://" + host + "/";
    try {
      remoteServer = (RemoteServer)Naming.lookup(url + "server");
    } catch(Exception e) {
      System.out.println("Exception generated: "+ e.getMessage());
    }

    setSize(xLim, yLim);
    setVisible(true);
    addKeyListener(new L());

    thread.start();
  }

  public void run() {
    while(true) {
      // Hämtar först till en tmp-vektor för att slippa blinkandet
      Vector ballsRawTmp = null;
      try {
        ballsRawTmp = remoteServer.getBalls();
      } catch(RemoteException re) {
        System.out.println("Exception generated: " + re.getMessage());
      }

      Graphics g = getGraphics();

      g.setColor(getBackground());
      for(int i = 0; i < ballsRaw.size(); i = i + 3) {
        int x = (Integer)ballsRaw.elementAt(i);
        int y = (Integer)ballsRaw.elementAt(i + 1);
        int r = (Integer)ballsRaw.elementAt(i + 2);
        g.fillOval(x, y, r, r);
      }

      ballsRaw = ballsRawTmp;
      for(int i = 0; i < ballsRaw.size(); i = i + 3) {
        int x = (Integer)ballsRaw.elementAt(i);
        int y = (Integer)ballsRaw.elementAt(i + 1);
        int r = (Integer)ballsRaw.elementAt(i + 2);
        
        int blue = r * 255 / rMax; if(blue > 255) blue = 255; if(blue < 0) blue = 0;
        g.setColor(new Color(0, 0, blue));
        g.fillOval(x, y, r, r);
      }

      setTitle("Antal bollar: " + ballsRaw.size() / 3);

      try { thread.sleep(50); } catch(Exception e) {}
    }
  }

  class L extends KeyAdapter {
    public void keyPressed(KeyEvent e) {
      try {
        if(e.getKeyChar() == '+') remoteServer.addBall();
        if(e.getKeyChar() == 'p') remoteServer.pauseBalls();
      } catch(RemoteException re) {
        System.out.println("Exception generated: " + re.getMessage());
      }
    }
  }
}