import java.util.ArrayList;

class Main {

    private static ArrayList<ShoppingCart> carts = 
        new ArrayList<ShoppingCart>();

    public static void main(String args[]) {

        Book harryPotter = new Book("Harry Potter", "ABC123", 10);
        Book gameOfThrones = new Book("A Game of Thrones", "XYZ567", 12);
        Book hungerGames = new Book("Hunger Games", "DEF790", 8);

        Foodstuff carrots = new Foodstuff(0.5);
        Foodstuff okra = new Foodstuff(0.8);
        Foodstuff kCups = new Foodstuff(30);

        User rock = new User("Dwayne");
        User rihanna = new User("Robyn", true);

        ShoppingCart rihannasCart = new ShoppingCart(rihanna);
        ShoppingCart rihannasOtherCart = new ShoppingCart(rihanna);
        ShoppingCart rocksCart = new ShoppingCart(rock);
        carts.add(rocksCart);
        carts.add(rihannasCart);
        carts.add(rihannasOtherCart);

        rihannasCart.add(gameOfThrones,1);
        rihannasCart.add(hungerGames,3);
        rihannasOtherCart.add(carrots,20);
        rihannasOtherCart.add(okra,5);
        rihannasOtherCart.add(okra,5);
        rihannasOtherCart.add(kCups);
        rocksCart.add(gameOfThrones);
        rocksCart.add(harryPotter);
        rocksCart.add(hungerGames);

        printCarts();
        enableHolidayDiscounts();
        System.out.println("The holiday season is here!");
        printCarts();
    }

    private static void printCarts() {
        for (int i=0; i<carts.size(); i++) {
            System.out.println(carts.get(i));
        }
    }

    private static void enableHolidayDiscounts() {
        for (int i=0; i<carts.size(); i++) {
            carts.get(i).setPricingStrategy(
                new DiscountPerishablePricingStrategy(.5));
        }
    }
}