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

public class Rectangle extends Shape {
	private double width;
	private double length;

	/**
	 * Constructor
	 * 
	 * @param x      x coordinate of the center of the rectangle
	 * @param y      y coordinate of the center of the rectangle
	 * @param width  width of the rectangle
	 * @param length length of the rectangle
	 */
	public Rectangle(double x, double y, double width, double length) {
		super(x, y);
		this.width = width;
		this.length = length;
	}

	/**
	 * Calculates the area of the rectangle.
	 *
	 * @return the area of the rectangle
	 */
	@Override
	public double area() {
		return width * length;
	}

	/**
	 * Resizing a rectangle changes its width and length to both be newSize.
	 *
	 * @param newSize the new size of the rectangle
	 */
	@Override
	public void resize(double newSize) {
		width = newSize;
		length = newSize;
	}

	/**
	 * Test.
	 */
	public static void testRectangle() {
		Rectangle r = new Rectangle(1.2, 3.4, 4.0, 5.0);
		// getX, getY, and move are inherited from Shape.
		// area and resize come from Rectangle itself.
		System.out.println(r.getX() == 1.2);
		System.out.println(r.getY() == 3.4);
		System.out.println(r.area() == 20.0);
		// Move the rectangle. The area does not change.
		r.move(7.8, 9.0);
		System.out.println(r.getX() == 9.0);
		System.out.println(r.getY() == 12.4);
		System.out.println(r.area() == 20.0);
		// Resize the rectangle. The area changes but not the position.
		r.resize(12.0);
		System.out.println(r.getX() == 9.0);
		System.out.println(r.getY() == 12.4);
		System.out.println(r.area() == 144.0);
	}
}