package enumEx;

import java.util.Scanner;

// examples of using enums
public class MonthHarness {

    private static Scanner scan;

    // simple enum inside a class
    // technically available as MonthHarness.LightColor
    public enum LightColor {
        RED, GREEN, BLUE
    };

    // example using LightColor enum
    public static void LightColorEnumEx() {
        System.out.println("What color, RED, GREEN, or BLUE?");
        String str = scan.next();

        // program crashes if they don't give one of the three valid values
        LightColor c = LightColor.valueOf(str.toUpperCase());

        if (c == LightColor.RED) {
            System.out.println("redrum, redrum");
        }

        switch (c) {
            case RED:
                System.out.println("Bold choice.");
                break;
            case GREEN:
                System.out.println("Not easy, is it?");
                break;
            case BLUE:
                System.out.println("That's cool.");
                break;
        }
    }

    public static void printArray(Date[] list) {
        // elt is each Date in list, in turn
        for (Date elt : list) {
            System.out.println(elt);
        }
    }

    // example of switch statement using enum
    public static void monthOpinion(Month m) {
        System.out.println("The month of " + m);
        switch (m) {
            case FEBRUARY:
                System.out.println("Cold, but short");
                break;
            case MAY:
                System.out.println("Everybody's birthday!");
                break;
            case AUGUST:
                System.out.println("Too hot, too long");
                break;
            case NOVEMBER:
                System.out.println("May contain turkey");
                break;
            default:
                System.out.println("it's a month... meh");
                break;
        }

    }

    // examples of using enum Month
    public static void main(String[] args) {
        scan = new Scanner(System.in);

        System.out.println("\n using LightColor enumeration");
        LightColorEnumEx();

        System.out.println("\n\n using Month enumeration");

        Month m = Month.MARCH;
        System.out.println(m + " has " + m.days() + " days");

        monthOpinion(Month.MAY);
        monthOpinion(m);

        // Month.values() returns array of all Months
        // so generate random index in that array
        // this gets us a random month
        monthOpinion(Month.values()[((int) (Math.random() * Month.values().length))]);

        Date d = new Date(m, 4);
        System.out.println("Chosen date " + d);

        // array of dates
        Date[] dlist = new Date[12];
        // foreach loop -- curr is each Month from the array in turn
        for (Month curr : Month.values()) {
            // curr.ordinal() converts the Month to an int
            // so we can use as array index
            // choose random day of the month
            dlist[curr.ordinal()] = new Date(curr, (int) (Math.random() * curr.days()) + 1);
        }
        System.out.println("\n\nArray of random dates, one per month");
        printArray(dlist);

    }
}