import objectdraw.*;

// Play the vintage pong-like video game "breakout"
// Display walls of bricks on the screen, a moving
// ball and a paddle.  When the ball hits a brick
// the brick disappears while the ball bounces off.
public class Breakout extends FrameWindowController {

    // dimensions of the grid in which bricks are placed
    private static final int COLS = 7;
    private static final int ROWS = 30;

    // locations and dimensions of brick walls
    private static final int WALL1_START_ROW = 3;
    private static final int WALL2_START_ROW = 10;

    // ratio between size of paddle and bricks
    private static final double PADDLERATIO = 1.5;

    // dimensions of the paddle
    private double paddleWidth, paddleHeight;

    // dimensions of bricks
    private double brickWidth, brickHeight;

    // the paddle
    private FilledRect paddle;

    // the collection of bricks placed in the playing area
    private BreakoutBricks bricks;

    // create the boundary and the paddle
    public void begin() {
        brickWidth = canvas.getWidth() / COLS;
        brickHeight = canvas.getHeight() / ROWS;

        paddleWidth = PADDLERATIO * brickWidth;
        paddleHeight = PADDLERATIO * brickHeight;

        // create the bricks
        bricks = new BreakoutBricks(ROWS * COLS);

        paddle = new FilledRect(canvas.getWidth()/2 - paddleWidth/2,
            canvas.getHeight() - (paddleHeight + 2),
            paddleWidth, paddleHeight, canvas);

        // add two groups of bricks
        addWall(WALL1_START_ROW);
        addWall(WALL2_START_ROW);
    }

    private static final int BRICK_SPACING = 2;
    private static final int WALL_ROWS = 4;

    private void addWall(int startingRow) {
        for (int row = startingRow; row < startingRow + WALL_ROWS; row++) {
            for (int col = 0; col < COLS; col++) {
                bricks.add(new FilledRect(col * brickWidth + BRICK_SPACING, 
                        brickHeight * row, 
                        brickWidth - BRICK_SPACING, brickHeight - BRICK_SPACING, canvas));
            }
        }
    }

    // Make a new ball whenever the user clicks
    public void onMouseClick(Location point){
        new BreakoutBall(bricks, paddle, canvas);
    }

    // make the paddle follow the mouse back and forth
    public void onMouseMove(Location point){
        if (point.getX() < 0) {
            paddle.moveTo(0, paddle.getY());
        } else if (point.getX() + paddleWidth > canvas.getWidth()) {
            paddle.moveTo(canvas.getWidth() - paddleWidth, paddle.getY());
        } else {
            paddle.moveTo(point.getX(), paddle.getY());
        }
    }

}