/* cappello@cs.ucsb.edu
   Peter Cappello
   Perm. no. 123456
   Zap 'em! Version using inheritance;
            burn processing in paint method;
            game initialization done awkwardly
 */
import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class zapem extends Applet implements ActionListener, MouseListener {
    final static int NUMTYPES = 2,         // number of kinds of roaches
                     FIELDSIZE = 350,
                     XUL = 25,
                     YUL = 35,
                     XLR = 25 + FIELDSIZE,
                     YLR = 35 + FIELDSIZE,
                     RECTANGLE = 0,
                     OVAL      = 1,
                     MAXROACHES = 9,
                     MOUSENOTPRESSED = -1;
    Label     speedL  = new Label("Speed: 1 - 5 (Slowest)"),
              numL    = new Label("Number of Roaches: 1 - 9");
    TextField speedT  = new TextField("5", 1),
              numT    = new TextField("2", 1);
    int speed = 5,                 // speed of movements
        num = 2,                   // number of roaches
        numRectangles,
        numOvals,
        x, y;                      // cursor coordinates
    boolean newGame = true;        // first time paint was invoked?
    Rectangle rectangles[] = new Rectangle[MAXROACHES];
    Oval      ovals[]      = new Oval[MAXROACHES];

    public void init() {
        add(speedL); add(speedT);
        add(numL);   add(numT);
        speedT.addActionListener(this);
        numT.addActionListener(this);
        addMouseListener(this);
    }

    public void paint(Graphics g) {
        // if a new game, initialize the new game
        if (newGame) {
            numRectangles = numOvals = 0;
            x = MOUSENOTPRESSED;                       // indicate mouse not pressed
            for (int i = 0; i < num; i++)
                switch ((int) (Math.random()*NUMTYPES)) {
                    case RECTANGLE:
                        rectangles[numRectangles++] = new Rectangle(FIELDSIZE);
                        break;
                    case OVAL:
                        ovals[numOvals++] = new Oval(FIELDSIZE);
                        break;
                }
            newGame = false;
        }
        // delineate the field with a black box
        g.drawRect(XUL, YUL, FIELDSIZE, FIELDSIZE);
        // if any roach does is not entirely within the field, blacken the field
        for (int i = 0; i < numRectangles; i++)
            if (rectangles[i].out(XUL, YUL, XLR, YLR)) {
                g.fillRect(XUL, YUL, FIELDSIZE, FIELDSIZE);
                return;
            }
        for (int i = 0; i < numOvals; i++)
            if (ovals[i].out(XUL, YUL, XLR, YLR)) {
                g.fillRect(XUL, YUL, FIELDSIZE, FIELDSIZE);
                return;
            }
        // if & only if the mouse was pressed, burn all affected roaches
        if (x != MOUSENOTPRESSED) { // mouse was pressed
            for (int i = 0; i < numRectangles; i++)
                if (rectangles[i].in(x, y)) {
                    rectangles[i].setColor(Color.red);
                    rectangles[i].setDx(0);
                    rectangles[i].setDy(0);
                }
            for (int i = 0; i < numOvals; i++)
                if (ovals[i].in(x, y)) {
                    ovals[i].setColor(Color.red);
                    ovals[i].setDx(0);
                    ovals[i].setDy(0);
                }
            x = MOUSENOTPRESSED;
        }
        // move and draw the roaches
        for (int i = 0; i < numRectangles; i++) {
            rectangles[i].move();
            rectangles[i].draw(g);
        }
        for (int i = 0; i < numOvals; i++) {
            ovals[i].move();
            ovals[i].draw(g);
        }
        repaint(speed*100); //repaint after sleeping speed*100 millis
    }

    public void actionPerformed(ActionEvent e) {
        speed = Integer.parseInt(speedT.getText());
        if (speed < 1 || speed > 5) {
            speedT.setText("5");
            speed = 5;
        }
        num   = Integer.parseInt(numT.getText());
        if (num < 1 || num > 9) {
            numT.setText("2");
            num = 2;
        }
        newGame = true;
        repaint();
    }

    public void mousePressed(MouseEvent e) {
        x = e.getX();
        y = e.getY();
        repaint();
    }
    public void mouseClicked(MouseEvent e)  {}
    public void mouseReleased(MouseEvent e) {}
    public void mouseEntered(MouseEvent e)  {}
    public void mouseExited(MouseEvent e)   {}
}