// Deck.java

import java.util.ArrayList;
import java.util.Random;

public class Deck {
    private ArrayList<Card> cards;

    public Deck() {
        cards = new ArrayList<>();
    }

    public void add52() {
        for (Suit s : Suit.values()) {
            for (int v = 2; v <= 14; v++) {
                cards.add(new Card(s, v));
            }
        }
    }

    public Card deal() {
        // return the top card, if there is one
        if (cards.size() == 0) {
            return null;
        } else {
            Card top = cards.get(0);
            cards.remove(0);
            return top;
        }
    }

    public void shuffle() {
        Random rng = new Random();

        ArrayList<Card> shuffled = new ArrayList<>();

        while (cards.size() > 0) {
            // pick a random card
            int index = rng.nextInt(cards.size());
            Card c = cards.get(index);

            // remove it from old deck
            cards.remove(index);

            // add it to new, shuffled deck
            shuffled.add(c);
        }

        cards = shuffled;
    }

    public void print() {
        for (Card c : cards) {
            System.out.println(c);
        }
    }
}