/* =============================================================
   Monte Carlo experiment to find the probability of Poker hands
   ============================================================= */

public class PokerProbab
{

   public static void main(String[] args)
   {
      DeckOfCards a;
      Card[] player1 = new Card[5];
      int i, j, cut, NHands;
      int NRoyal, NStraightFlush, NFlush, NStraight,
          N4s, N3s, N22s, N2s, NFullHouse, NHighCard;

      if ( args.length == 0 )
      {
         System.out.println("Usage: java PokerProbab #Hands");
         System.exit(1);
      }

      NHands = Integer.parseInt( args[0] );

      a = new DeckOfCards();

      NRoyal = NStraightFlush = NFlush = NStraight =
          N4s = N3s = N22s = N2s = NFullHouse = NHighCard = 0;

      for ( i = 1; i <= NHands ; i++ )
      {
         a.shuffle(100);		// Shuffle

         cut = (int) (20 + 10*Math.random());  // Cut the deck
         for ( j = 0; j < cut; j++ )           // Deal the cut away
            a.deal();

         for ( j = 0; j < 5; j++ )	// Deal a Poker hand
            player1[j] = a.deal();

         if ( Poker.isFlush(player1) && Poker.isStraight(player1) )
         {
	    Poker.sortByRank( player1 );

	    if ( player1[4].rank() == 14 )
	       NRoyal++;
	    else
	       NStraightFlush++;
	 }
         else if ( Poker.is4s(player1) )
	   N4s++;
         else if ( Poker.isFullHouse(player1) )
	   NFullHouse++;
         if ( Poker.isFlush(player1) )
	   NFlush++;
         if ( Poker.isStraight(player1) )
	   NStraight++;
         else if ( Poker.is3s(player1) )
	   N3s++;
         else if ( Poker.is22s(player1) )
	   N22s++;
         else if ( Poker.is2s(player1) )
	   N2s++;
         else
	   NHighCard++;


         if ( (i*10) % NHands == 0 )
	    System.out.println("# Hands played = " + i);
      }

      System.out.println();
      System.out.println("Probability of Royal Flush    ~= " 
		           + ((double)NRoyal / NHands)*100 + "%" );
      System.out.println("Probability of Straight Flush ~= " 
		           + ((double)NStraightFlush / NHands)*100 + "%" );
      System.out.println("Probability of 4 of a kind    ~= " 
		           + ((double)N4s / NHands)*100 + "%" );
      System.out.println("Probability of Full House     ~= " 
		           + ((double)NFullHouse/ NHands)*100 + "%" );
      System.out.println("Probability of Flush          ~= " 
		           + ((double)NFlush / NHands)*100 + "%" );
      System.out.println("Probability of Straight       ~= " 
		           + ((double)NStraight / NHands)*100 + "%" );
      System.out.println("Probability of Set            ~= " 
		           + ((double)N3s / NHands)*100 + "%" );
      System.out.println("Probability of 2 Pairs        ~= " 
		           + ((double)N22s / NHands)*100 + "%" );
      System.out.println("Probability of 1 Pair         ~= " 
		           + ((double)N2s / NHands)*100 + "%" );
      System.out.println("Probability of High Card      ~= " 
		           + ((double)NHighCard / NHands)*100 + "%" );
      System.out.println();
      System.out.println();

   }
}