import java.util.Random;
import java.util.ArrayList;
import java.util.List;
import java.util.Collections;

public class Pack {

  private List<Card> cards = new ArrayList<Card>();
  private final Random random = new Random();

  public static void main(String[] args) {
    Pack deck = new Pack();
    deck.println();
    deck.shuffle();
    deck.println();
    for (int i = deck.cards.size(); i > 0; i--) {
      System.out.print(deck.next() + ",");
    }
    System.out.println(deck.cards.size());
  }

  public Pack() {
    for (Suit s : Suit.values()) {
      for (Rank r : Rank.values()) {
        cards.add(new Card(r, s));
      }
    }
  }

  public void shuffle() {
    for (int i = cards.size() - 1; i > 0; i--) {
      int index = random.nextInt(i);
      Collections.swap(cards, i, index);
    }
  }

  public Card next() {
    assert cards.size() > 0 : "There must be at least one card";
    Card c = cards.get(cards.size() - 1);
    cards.remove(cards.size() - 1);
    return c;
  }


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