import java.awt.*;
import java.awt.event.*;
import java.awt.Graphics;
import javax.swing.*;
import org.omg.CosNaming.*;
import org.omg.CORBA.*;

/* ************************************************* */


public class hrclient extends JFrame
{
  private Graphics brush;
  public Graphics display;
  private Image canvas;    // off-screen graphics buffer
  private Image background; // racing background gif
  private Image staticbkgrd; // static (stretched) background;
  private Image racergif;    // horse and rider animated gif
  public int HN = 3;       // number of horses
  public int TW = 800; // track length;
  public int TH;   // track height - depends on number of racers
  public int LW = 60;  // lane width    
  private byte id;
  private horse[] H;    // information for all horses

  private horserace server;   // corba orbject

  public void paint(Graphics g) {}  // overrides auto-update

  public static void main(String[] args) // needed for application
  {
    hrclient session  = new hrclient();
    session.addWindowListener(new WindowAdapter() {
              public void windowClosing(WindowEvent e) {System.exit(0);} });
    session.init(args);
  } // main

  public void init(String[] args)
    {

       //CORBA STUFF
    try
    {
      String[] options = new String[4];
      options[0] = "-ORBInitialHost"; options[1] = args[1];
      options[2] = "-ORBInitialPort"; options[3] = "10000";

      ORB myorb = ORB.init(options,null);   
      org.omg.CORBA.Object objref = 
	     myorb.resolve_initial_references("NameService");

      // connect with naming service (registry)
      NamingContext ncref = NamingContextHelper.narrow(objref);
      NameComponent[] path = 
	     { new NameComponent("hrserver","Object") };
      // use nameservice, narrow to obtain object reference
      server = horseraceHelper.narrow(ncref.resolve(path));
    } catch (Exception e) {e.printStackTrace();}

    // register with server:
       ByteHolder idh = new ByteHolder();
       System.out.println("waiting for other racers ...");
       H = server.joinrace(args[0],idh);
       id = idh.value;
       HN = H.length;

       TH = (this.HN * this.LW) + this.LW+10;
       setBounds(0,0,TW,TH);
       show();
       background = Toolkit.getDefaultToolkit().getImage("hrbackground.gif");
       prepareImage(background,this);
       racergif = Toolkit.getDefaultToolkit().getImage("racer.gif");
       prepareImage(racergif,this);
       canvas = createImage(TW,TH);
       staticbkgrd = createImage(TW,TH);
       brush = canvas.getGraphics();  // to double buffer
       brush.setColor(Color.blue);   
       display = this.getGraphics(); // to screen
       try { Thread.sleep(750); } catch (InterruptedException IE) {}
       staticbkgrd.getGraphics().drawImage(background,0,0,TW,TH-30,null);
       resetbackground();
       displayStatus("waiting for other racers ...");
       display.drawImage(canvas,0,0,null);  // draws to screen

       race();
    } // init

   public int randint(int min, int max) 
    { return (int) (Math.random() * (max-min+1) + min); }

   private void resetbackground()
    { 
       brush.drawImage(staticbkgrd,0,30,null);
       // draw track lines
       brush.setColor(Color.blue);   
       for(int i=1;i<=HN+1;i++)
	   { brush.drawLine(0,(i*LW)-5,TW-1,(i*LW)-5); }
       // finish line:
       brush.setColor(Color.red);   
       brush.drawLine(TW-15,0,TW-15,TH-1);  // finish line
    } // resetbackground

   public void nextframe(int delay) // delay in ms
    {
       try { Thread.sleep(delay); } catch (InterruptedException IE) {}
       display.drawImage(canvas,0,0,null);  // draws to screen
       resetbackground();
    } // nextframe with ms delay

   public void displayStatus(String message)
    {
	Font oldfont = brush.getFont();
	brush.setFont(new Font("Serif",Font.BOLD,24));
	brush.drawString(message,TW/3,LW-10);
	brush.setFont(oldfont);
    }



    public void draw(horse racer)
    {
	brush.setColor(Color.black);
	brush.drawString(racer.name,10,(racer.y+55));
	brush.drawImage(racergif,racer.x,racer.y,null);
    }


   public void race()
    {
        int i; // loop counter
        boolean stoprace = false;
        int winner;
        for(i=0;i<HN;i++) draw(H[i]);
        nextframe(500);
        while (!stoprace) 
        {
          for(i=0;i<HN;i++) draw(H[i]);
          nextframe(50);
          winner = determineLeader(H);
          if (winner==-1) displayStatus("It's a tie!");
          else displayStatus("The leader is "+H[winner].name);

	  H = server.moveForward(id, randint(1,6));
	  if (!H[id].inrace) stoprace = true;

        } // main while loop
    } // race


   public int determineLeader(horse[] H)
    {   
        int i, lead, winner;
        lead = H[0].x;  winner = 0; 
        for(i=1;i<H.length;i++)
            {
              if (H[i].x > lead)
                { lead = H[i].x; winner = i; }
              else
              if (H[i].x == lead) winner = -1;
            } // for loop
        return winner;

    } // determineLeader



} // class hrclient