/* -----------------------------------------------------
   Deck: a deck of cards
   ----------------------------------------------------- */

public class DeckOfCards
{
   public static final int NCARDS = 52;

   private Card[] deckOfCards;         // Contains all 52 cards
   private int currentCard;            // deal THIS card in deck

   public DeckOfCards( )
   {
      deckOfCards = new Card[ NCARDS ];

      int i = 0;

      for ( int suit = Card.DIAMOND; suit <= Card.SPADE; suit++ )
         for ( int rank = 1; rank <= 13; rank++ )
             deckOfCards[i++] = new Card(suit, rank);

      currentCard = 0;
   }

   /* ---------------------------------
      shuffle(n): shuffle the deck
      --------------------------------- */
   public void shuffle(int n)
   {
      int i, j, k;

      for ( k = 0; k < n; k++ )
      {
	  i = (int) ( NCARDS * Math.random() );  // Pick 2 random cards
	  j = (int) ( NCARDS * Math.random() );  // in the deck

	  /* ---------------------------------
	     swap these randomly picked cards
	     --------------------------------- */
	  Card tmp = deckOfCards[i];
	  deckOfCards[i] = deckOfCards[j];
	  deckOfCards[j] = tmp;
      }

      currentCard = 0;   // Reset current card to deal
   }

   /* -------------------------------------------
      deal(): deal deckOfCards[currentCard] out
      ------------------------------------------- */
   public Card deal()
   {
      if ( currentCard < NCARDS )
      {
         return ( deckOfCards[ currentCard++ ] );
      }
      else
      {
	 System.out.println("Out of cards error");
	 return ( null );  // Error;
      }
   }

   public String toString()
   {
      String s = "";
      int k;

      k = 0;
      for ( int i = 0; i < 4; i++ )
      {
         for ( int j = 1; j <= 13; j++ )
             s += (deckOfCards[k++] + " ");

         s += "\n";
      }
      return ( s );
   }
}