package Shapes;

import java.awt.Color;

/**
 * Demo file, it may not be correct and/or complete.  
 * Please watch the corresponding lecture(s) for more explanations.
 * 
 * @author ashesh
 *
 */

public class TestCircle {

	public static void main(String[] args) {

		Circle c1 = new Circle(2, 2, 4);
		System.out.println("c1 area is: " + c1.area());

		Circle c2 = new Circle(5, 1, 3);
		System.out.println("c2 area is: " + c2.area());

		Circle c3 = new GraphicalCircle();
		System.out.println("c3 area is: " + c3.area());

		Circle c4 = new GraphicalCircle(3, 2, 4, Color.blue, Color.green);
		System.out.println("c4 area is: " + c4.area());

		/**
		 * Class variable, "Circle.count_circle" 
		 */
		System.out.println("Circle.count_circle : " + Circle.count_circle);

		/**
		 *  Methods Overriding, 
		 *  Polymorphism Example
		 */
		// create an array to hold shapes
		Shape[] shapes = new Shape[4];
		shapes[0] = new Circle(4, 6, 2);
		shapes[1] = new Rectangle(1.0, 3.0);
		shapes[2] = new Rectangle(4.0, 2.0);
		shapes[3] = new GraphicalCircle(1, 1, 6,
				Color.green, Color.yellow);

		int count_circle = 0;
		double total_area = 0;
		int onlyCircleClass_count = 0;

		for (int i = 0; i < shapes.length; i++) {

			// Compute the area of the shapes using
			// polymorphism (behaviour) below.

			total_area += shapes[i].area();

			// instanceof will match objects of types Circle and its subclasses (like GraphicalCircle)
			if (shapes[i] instanceof Circle) {
				count_circle++;
			}

			// the following will only match objects of type Circle
			if (shapes[i].getClass() == Circle.class) {
				onlyCircleClass_count++;
			}

		}

		System.out.println("total_area is: " + total_area);

		System.out.println("count_circle is: " + count_circle);
		System.out.println("onlyCircle_count is: " + onlyCircleClass_count);

		/**
		 * Class variables, 
		 * "Circle.count_circle" and "Shape.count_shapes"
		 */
		System.out.println("Circle.count_circle : " + Circle.count_circle);
		System.out.println("Shape.count_shapes : " + Shape.count_shapes);

		/**
		 * Casting example
		 * if shapeTemp is an instance of class Circle, 
		 * cast it to Circle, and call the instance method getR().
		 */
		Shape shapeTemp = shapes[0];

		/* Use of "instanceof"
		 * 
		 * Let's check if an object (shapeTemp) of type Shape is also 
		 * an instance-of Circle, if yes, cast it to Circle and print radius
		 */
		if (shapeTemp instanceof Circle) {

			// cast shapes[0] to Circle class
			Circle cTemp = (Circle) shapes[0];

			// call the instance method getR from the class Circle
			System.out.println("(1) Radius is:" + cTemp.getR());

			// Or use the following one-liner ... 
			System.out.println("(2) Radius is:" + ((Circle) shapes[0]).getR());
		}

		/** 
		 * Let's print area using the method "printArea" implemented 
		 * in  the abstract class "Shape"
		 * */

		for (Shape s : shapes) {
			s.printArea();
		}

	}

}