/*
 * Author: CHEN Yongyuan (Walter) 1930006025 from OOP(1007)
 * Date: 2022-04-14
 * Description: Square class inherited from Rectangle class
 */

public class Square extends Rectangle {
	/**
	 * Constructor.
	 *
	 * @param x    the x coordinate center of the square
	 * @param y    the y coordinate center of the square
	 * @param size the size of the square
	 */
	public Square(double x, double y, double size) {
		super(x, y, size, size);
	}

	/**
	 * Override the resize(double double) method check width == height.
	 *
	 * @param width  the new width of the square
	 * @param length the new length of the square
	 */
	@Override
	public void resize(double width, double length) throws CannotResizeException {
		if (width != length) {
			throw new CannotResizeException("Cannot resize a square into a rectangle!");
		}
		super.resize(width, length);
	}

	/**
	 * Test.
	 */
	public static void testSquare() {
		Square s = new Square(1.2, 3.4, 5.0);
		// getX, getY, and move are inherited from Shape.
		// area and resize are inherited from Rectangle.
		System.out.println(s.getX() == 1.2);
		System.out.println(s.getY() == 3.4);
		System.out.println(s.area() == 25.0);
		// Move the square. The area does not change.
		s.move(7.8, 9.0);
		System.out.println(s.getX() == 9.0);
		System.out.println(s.getY() == 12.4);
		System.out.println(s.area() == 25.0);
		// Resize the square. The area changes but not the position.
		s.resize(12.0);
		System.out.println(s.getX() == 9.0);
		System.out.println(s.getY() == 12.4);
		System.out.println(s.area() == 144.0);

		// Resize the square again with different width and length!
		// Now the square is not square anymore!

		try {
			s.resize(10.0, 15.0);
			System.out.println(s.getX() == 9.0); // Unreachable.
			System.out.println(s.getY() == 12.4);
			System.out.println(s.area() == 150.0);
		} catch (CannotResizeException ex) {
			System.out.println(ex.getMessage() == "Cannot resize a square into a rectangle!");
		}
		// The area and position do not change.
		System.out.println(s.getX() == 9.0);
		System.out.println(s.getY() == 12.4);
		System.out.println(s.area() == 144.0);
		// Resize the square again with equal width and length.
		// The area changes but not the position.
		try {
			s.resize(10.0, 10.0);
		} catch (CannotResizeException ex) {
			System.out.println("BUG! This must never happen!");
		}
		System.out.println(s.getX() == 9.0);
		System.out.println(s.getY() == 12.4);
		System.out.println(s.area() == 100.0);

	}
}