import java.awt.*;
import java.util.*;
import java.awt.image.*;
import java.awt.event.*;

public class CarWorld extends EventPanel implements Runnable {

	private Vehichle car;
	private Obstacle[] obstacle;
	private AButton stop,start;
	private MiscButton show, hide, startOver;
	private Image offScreen;
	private Graphics offScreenGraphics;
	private Thread runner;

	private int p1x,p1y,p2x,p2y;

	private boolean running = true, openToChange=false;
	private int count;
	private boolean sensor1 = false, sensor2 = false;

	public CarWorld() {
		stop = new AButton(485,30,"Stop");
		start = new AButton(440,30,"Start");
		show = new MiscButton(440,55, "Show Sensors");
		hide = new MiscButton(440,80, "Hide Sensors");
		startOver = new MiscButton(440,240, "Start Over");
		car = new Vehichle(100,120,"Bob");
		obstacle = new Obstacle[50];
		count = 0;
		obstacle[0] = new Obstacle(200,120,50);
		runner = new Thread(this);
		}

	public void update(Graphics g) {
		paint(g);
		}

	public void paint(Graphics g) {
		if (offScreen==null) {
			offScreen = createImage(555,380);
			offScreenGraphics = offScreen.getGraphics();
			offScreenGraphics.setColor(Color.white);
			offScreenGraphics.fillRect(0,0,555,380);
			runner.start();
			}
		g.drawImage(offScreen,0,0,null);
		}

	public void run() {

		while (offScreen == null)
				pause();
		while (running) {
				for (int l=0; l<=count; l++) {
					obstacle[l].display(offScreenGraphics);
					}
				p1x = car.sensorOneX();
				p1y = car.sensorOneY();
				p2x = car.sensorTwoX();
				p2y = car.sensorTwoY();
				getPixels1(offScreen);
				getPixels2(offScreen);
				car.move(offScreenGraphics, sensor1, sensor2);
				car.showTable(offScreenGraphics);
				stop.display(offScreenGraphics);
				start.display(offScreenGraphics);
				hide.display(offScreenGraphics);
				show.display(offScreenGraphics);
				startOver.display(offScreenGraphics);
				repaint();
				pause();
				}
		}


	public void pause() {
		try {
			Thread.currentThread().sleep(10);
		}
		catch(Throwable t) {
		}
		}

	public void mousePressed(MouseEvent e)	{
		int x = e.getX();
		int y = e.getY();
		if (stop.inside(x,y) && running==true) {
			System.out.println("Stopped by user..");
			running = false;
			openToChange = true;
			runner.suspend();
			}
		else if (start.inside(x,y) && running==false) {
			System.out.println("Started by user...");
			running = true;
			openToChange = false;
			runner.resume();
			}

		else if (startOver.inside(x,y) && running==false) {
			clearEverything(offScreenGraphics);
			}

		else if (show.inside(x,y)) car.setSensorDisplayOn();
		else if (hide.inside(x,y)) car.setSensorDisplayOff();

		else if (x < 420 && openToChange && count < 49) {
			//System.out.println("Adding an obstacle");
			addObstacle(x,y);
			}

		else if (openToChange) {
			car.checkTable(offScreenGraphics,x,y);
			repaint();
			}

 		}

 	public void clearEverything(Graphics g) {
 		count=0;
 		car.resetAllThings();
 		car.resetValues();
 		offScreenGraphics.setColor(Color.white);
		offScreenGraphics.fillRect(0,0,555,380);
		stop.display(offScreenGraphics);
		start.display(offScreenGraphics);
		hide.display(offScreenGraphics);
		show.display(offScreenGraphics);
		startOver.display(offScreenGraphics);
		car.move(offScreenGraphics, sensor1, sensor2);
		car.showTable(offScreenGraphics);
		obstacle[0].display(offScreenGraphics);
 		repaint();
 	}

 	public void addObstacle(int ox, int oy) {
		count++;
		obstacle[count] = new Obstacle(ox,oy,50);
		//System.out.println("Obstacle added at " + ox + ", " + oy);
		obstacle[count].display(offScreenGraphics);
		repaint();
 		}

 	public void getPixels1(Image img) {
 		try {
	 		PixelGrabber grabber = new PixelGrabber(img,p1x,p1y,1,1,true);
	 		if (grabber.grabPixels())
	 			{
		  		int[] pix = (int[])grabber.getPixels();
					int r1 = (pix[0] >> 16) & 255;
					if (r1>0) r1 = 1;
					int g1 = (pix[0] >> 8) & 255;
					if (g1>0) g1 = 1;
					int b1 = (pix[0]) & 255;
					if (b1>0) b1 = 1;
						if (r1==1 && g1==1 && b1!=1) sensor1=true;
						else sensor1=false;
		 			}
		 		}
 		catch (InterruptedException e) {
 			System.err.println("interrupted waiting for pixels!");
 			}
 		}

 public void getPixels2(Image img) {
 		try {
	 		PixelGrabber grabber = new PixelGrabber(img,p2x,p2y,1,1,true);
	 		if (grabber.grabPixels())
	 			{
		  		int[] pix = (int[])grabber.getPixels();
					int r2 = (pix[0] >> 16) & 255;
					if (r2>0) r2 = 1;
					int g2 = (pix[0] >> 8) & 255;
					if (g2>0) g2 = 1;
					int b2 = (pix[0]) & 255;
					if (b2>0) b2 = 1;
						if (r2==1 && g2==1 && b2!=1) sensor2=true;
						else sensor2=false;
		 			}
	 			}
 		catch (InterruptedException e) {
 			System.err.println("interrupted waiting for pixels!");
 			}
 		}
}