public class Heavy extends AbstractFallHandler
{
    public Heavy(final String name) {
	super(name);
    }

    public boolean supportExists(Board board, int x, int y) {
	while (y < board.getHeight() + Board.getOutsideMargin()) {
	    if (board.getSquareFromBoard(x, y) == SquareType.EMPTY) {
		return false;
	    }
	    y++;
	}
	return true;
    }

    public void pushDown(Board board, int x, int y) {
	int start = y;
	while (start < board.getHeight() + Board.getOutsideMargin()) {
	    if (board.getSquareFromBoard(x, start) == SquareType.EMPTY) {
		break;
	    }
	    start++;
	}

	for (int i = start; i > y - 1; i--) {
	    board.setSquareAt(x, i, board.getSquareFromBoard(x, i - 1));
	}
    }

    public boolean hasCollision(Board board) {
	//Checking if capable of pushing down blocks
	for (int y = 0; y < board.getFalling().getHeight(); y++) {
	    for (int x = 0; x < board.getFalling().getWidth(); x++) {
		SquareType fallingSquare = board.getFalling().getSquareAt(x, y);

		if (fallingSquare != SquareType.EMPTY) {
		    if (board.getSquareFromBoard(board.getFallingX() + x, board.getFallingY() + y) == SquareType.OUTSIDE ||
			supportExists(board, board.getFallingX() + x, board.getFallingY() + y)) {
			return true;
		    }
		}
	    }
	}

	//Pushing down block(s)
	for (int y = 0; y < board.getFalling().getHeight(); y++) {
	    for (int x = 0; x < board.getFalling().getWidth(); x++) {
		if (board.getSquareFromBoard(board.getFallingX() + x, board.getFallingY() + y) != SquareType.EMPTY &&
		    board.getFalling().getSquareAt(x, y) != SquareType.EMPTY) {
		    pushDown(board, board.getFallingX() + x, board.getFallingY() + y);
		}
	    }
	}
	return false;
    }
}