import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;
import java.net.*;
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;

public class Client extends UnicastRemoteObject implements RemoteClient {
  public static void main(String[] args) throws RemoteException {
    new Client(args[0]);
  }

  public Client(String host) throws RemoteException {
    String url = "rmi://" + host + "/";
    try {
      // Gör dig tillgänglig utåt
      if(host.equals("localhost")) {
        // Servern har redan startat rmiregistryt
        LocateRegistry.getRegistry(1099);
      } else {
        LocateRegistry.createRegistry(1099);
      }
      Naming.rebind("client_callbacks", this);
      System.out.println("Client bound");

      // Fixa en referens till servern
      RemoteServer remoteServer = (RemoteServer)Naming.lookup(url + "server_callbacks");

      // Register with the server
      String clientHost = InetAddress.getLocalHost().getHostAddress();
      remoteServer.registerClient(clientHost);

      // Dra igång visningen
      new ClientGUI(remoteServer);

    } catch(Exception e) {
      System.out.println("Exception generated: "+ e.getMessage());
    }
  }

  public void showServerClients(String message) throws RemoteException {
    System.out.println(message);
  }
}




class ClientGUI extends JFrame implements Runnable {
  RemoteServer remoteServer = null;
  Vector ballsRaw = new Vector();

  Thread thread = new Thread(this);
  int xLim = 500, yLim = 500, rMax = 70;

  public ClientGUI(RemoteServer remoteServer) {
    this.remoteServer = remoteServer;

    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();
        if(e.getKeyChar() == 'e') {
          String clientHost = InetAddress.getLocalHost().getHostAddress();
          remoteServer.unregisterClient(clientHost);
          System.exit(1);
        }
      } catch(Exception ee) {
        System.out.println("Exception generated: " + ee.getMessage());
      }
    }
  }
}