/* Race Applet
   Eric Jewart
   CPS 1 Spring 1998

This applet is the main class.  It creates a RaceTrack, a car that
extends RaceCar, and some other components.  It also sticks itself
in a Thread and runs.
*/

package awb;
import java.awt.*;
import java.util.*;
import java.net.*;

public class Race extends Panel implements Runnable
{
  public final static int MS_PER_UPDATE = 100;	// must be >= 10
    public final static int MPP = 2;	// meters per pixel


    private URL myCodeBase;
    private RaceTrack myTrack;
    private RaceCar myCar;
    private CarInfo myCarInfo;
    private RaceInfo myRaceInfo;
    private ScoreReporter myScorer;
    private Button myStartButton, myStopButton, 
		myAdvanceButton, myReportButton;
    private Thread mySelf;
    private boolean myRaceIsOn = false;

    public Race(RaceCar rc)
    {
	setBackground(Color.white);

	try { myCodeBase = 
		new URL("http://www.cs.duke.edu/~ecj/cps1/awb/track1.dat"); }
	catch (MalformedURLException ex) { }

	myCar = rc;
	myTrack = new RaceTrack(this, myCar, myCodeBase, "track1.dat");
	System.out.print("creating components");
	System.out.flush();
	myCarInfo = new CarInfo(myCar);
	System.out.print("..");
	System.out.flush();
	myRaceInfo = new RaceInfo(this, myTrack);
	System.out.print("..");
	System.out.flush();
	myScorer = new ScoreReporter(this,myCar.getLogin());
	System.out.print("..");
	System.out.flush();
	myStartButton = new Button("Go");
	System.out.print("..");
	System.out.flush();
	myStopButton = new Button("Stop");
	System.out.print("..");
	System.out.flush();
	myAdvanceButton = new Button("Advance");
	System.out.print("..");
	System.out.flush();
	myReportButton = new Button("Report Score");
	myReportButton.disable();	// have to go three laps min
	System.out.println("done");

	setLayout(new BorderLayout());
	add("Center", myTrack);

	Panel p = new Panel();
	GridBagLayout g = new GridBagLayout();
	p.setLayout(g);
	Constrainer.addComponent(g,myCarInfo,p,0,0,1,5,100,100,
		GridBagConstraints.BOTH,GridBagConstraints.CENTER);
	Constrainer.addComponent(g,myRaceInfo,p,1,0,1,5,100,100,
		GridBagConstraints.BOTH,GridBagConstraints.CENTER);
	Constrainer.addComponent(g,myStartButton,p,2,0,1,1,100,0,
		GridBagConstraints.HORIZONTAL,GridBagConstraints.CENTER);
	Constrainer.addComponent(g,myStopButton,p,2,1,1,1,100,0,
		GridBagConstraints.HORIZONTAL,GridBagConstraints.CENTER);
	Constrainer.addComponent(g,myAdvanceButton,p,2,2,1,1,100,0,
		GridBagConstraints.HORIZONTAL,GridBagConstraints.CENTER);
	Constrainer.addComponent(g,myReportButton,p,2,3,1,1,100,0,
		GridBagConstraints.HORIZONTAL,GridBagConstraints.CENTER);
	Constrainer.addComponent(g,new Panel(),p,2,4,1,1,100,300,
		GridBagConstraints.BOTH,GridBagConstraints.CENTER);
	add("South", p);
    }

    public void run()
    {
	while (myRaceIsOn)
	{
	    myTrack.update();
	    myCarInfo.update();
	    myRaceInfo.update();

	    try { Thread.sleep(MS_PER_UPDATE - (MS_PER_UPDATE/10)); }
	    catch (InterruptedException ex) { }
	}
	mySelf = null;	// must be done at end of while
    }

    public URL getCodeBase()
    {
	return myCodeBase;
    }

    public void startRace()
    {
	// make sure not already started
	if (myRaceIsOn) return;

	myRaceIsOn = true;
	myRaceInfo.startRace();
	mySelf = new Thread(this);
	mySelf.start();
    }

    public void stopRace()
    {
	if (! myRaceIsOn) return;
	myRaceIsOn = false;
	myRaceInfo.stopRace();

	myCarInfo.update();	// see if car crashed, finished
    }

    public void incrementLap()
    {
	myRaceInfo.incrementLap();
	if (myRaceInfo.getLaps() >= 3) myReportButton.enable();
    }

    public boolean action(Event e, Object o)
    {
	if (e.target == myStartButton)
	{
	    startRace();
	    return true;
	}

	if (e.target == myStopButton)
	{
	    stopRace();
	    return true;
	}

	if (e.target == myAdvanceButton)
	{
	    myTrack.update();
	    myCarInfo.update();
	    return true;
	}

	if (e.target == myReportButton)
	{
	    this.disable();
	    stopRace();
	    myScorer.show(myRaceInfo.getAvgTime());
	    return true;
	}

	return super.action(e,o);
    }
}