import objectdraw.*;

// a simple one-player version of the game Pong
public class Pong extends FrameWindowController {

    // dimensions of the window
    private static final int WINDOW_WIDTH = 500;
    private static final int WINDOW_HEIGHT = 550;

    // margin between court and window boundaries
    private static final int COURT_MARGIN = 50;
    private static final int COURT_LENGTH = WINDOW_WIDTH - 2 * COURT_MARGIN;

    // dimensions and y-coord of the paddle
    private static final int PADDLE_WIDTH = 60;
    private static final int PADDLE_HEIGHT = 20;
    private static final int PADDLE_Y = COURT_MARGIN + COURT_LENGTH - PADDLE_HEIGHT - 1;

    // the paddle itself
    private FilledRect paddle;

    // the rectangle surrounding the court playing area
    private FramedRect courtBoundary;

    public void begin() {
        resize(WINDOW_WIDTH, WINDOW_HEIGHT);

        // make the playing area
        courtBoundary = new FramedRect(COURT_MARGIN, COURT_MARGIN,
            COURT_LENGTH, COURT_LENGTH, canvas);  

        // make the paddle
        paddle = new FilledRect(COURT_MARGIN + (COURT_LENGTH - PADDLE_WIDTH) / 2,
            PADDLE_Y, PADDLE_WIDTH, PADDLE_HEIGHT, canvas);
    }

    public void onMouseMove(Location point) {

        if (point.getX() - PADDLE_WIDTH/2 < COURT_MARGIN) {
            // mouse past left edge, place paddle at left edge of the court
            paddle.moveTo(COURT_MARGIN, PADDLE_Y);
        } else if (point.getX() + PADDLE_WIDTH/2 > COURT_MARGIN + COURT_LENGTH) {
            // mouse past right edge, place paddle at right edge of the court
            paddle.moveTo(COURT_MARGIN + COURT_LENGTH - PADDLE_WIDTH, PADDLE_Y);
        } else {
            // mouse in the court area, keep the paddle lined up with the mouse
            paddle.moveTo(point.getX() - PADDLE_WIDTH/2, PADDLE_Y);
        }

    }

    public void onMousePress(Location point) {
        if (courtBoundary.contains(point)) {
            new PongBall(point, courtBoundary, paddle, canvas);
        }
    }

}