import java.util.Scanner;
public class CircularApp
{
    // This is a static variable. It will retain its value alongside class CircleApp
    private static Circle circle = null;
    // This is a static variable. It will retain its value alongside class CircleApp
    private static Elipse elipse = null;

    public static void main(String[] args)
    {
        int option;
        Scanner scanner = new Scanner(System.in);
        do {
            printMenu();
            option = scanner.nextInt();
            if (option == 1) circle = createCircle(scanner);
            else if (option == 2) elipse = createElipse(scanner);
            else if (option == 3) printCircleArea();
            else if (option == 4) printElipseArea();
            else if (option == 5) printCircleCircumference();
            else if (option == 6) printElipseCircumference();
        } while (option < 7);
        System.out.println("Thank you!!");
    }

    private static void printElipseCircumference() {
        if (elipse == null) System.out.println("Create a elipse first.");
        else elipse.printCircumference();
    }

    private static void printCircleCircumference() {
        if (circle == null) System.out.println("Create a circle first.");
        else circle.printCircumference();
    }

    private static void printElipseArea() {
        if (elipse == null) System.out.println("Create a elipse first.");
        else elipse.printArea();
    }

    private static void printCircleArea() {
        if (circle == null) System.out.println("Create a circle first.");
        else circle.printArea();
    }

    private static Elipse createElipse(Scanner scanner) {
        double smallRadius = 0.0;
        double largeRadius = 0.0;
        Elipse elipse;
        System.out.println("Enter the radius 1 to compute the area and circumference");
        smallRadius = scanner.nextDouble();
        System.out.println("Enter the radius 2 to compute the area and circumference");
        largeRadius = scanner.nextDouble();
        if (smallRadius > largeRadius) {
            double tempRadius = smallRadius;
            smallRadius = largeRadius;
            largeRadius = tempRadius;
        }
        elipse = new Elipse(smallRadius, largeRadius);
        System.out.println("A new elipse is created");
        return elipse;
    }

    private static Circle createCircle(Scanner scanner) {
        double radius = 0.0;
        Circle circle;
        System.out.println("Enter the radius to compute the area and circumference");
        radius = scanner.nextDouble();
        circle = new Circle(radius);
        System.out.println("A new circle is created");
        return circle;
    }

    private static void printMenu() {
        System.out.println("====== Circle Computation =======");
        System.out.println("|1. Create a new circle         |");
        System.out.println("|2. Create a new elipse         |");
        System.out.println("|3. Print Circle Area           |");
        System.out.println("|4. Print Elipse Area           |");
        System.out.println("|5. Print Circle circumference  |");
        System.out.println("|6. Print Elipse circumference  |");
        System.out.println("|7. Quit                        |");
        System.out.println("=================================");
        System.out.println("Choose option (1-6):");
    }
}