BlackJackv2.groovy

// Blackjack.groovy
// Author: Daniel W. Brodsky
// Free to use or redistribute

/*
 * An enumeration of the suits in a deck of cards.
 */
enum Suit
{
  clubs, diamonds, hearts, spades
}

/*
 * This object represents one card in a deck. It contains the point value,
 * the suit, a display name for pretty printing, and a flag indicating
 * whether it's an Ace, since those get special handling in points calculations.
 */
class Card
{
  final suit
    final value
    final name
    final isAce

    Card(Suit suit, int value, String name)
    {
      this(suit, value, name, false)
    }

  Card(Suit suit, int value, String name, boolean ace)
  {
    assert suit != null
      assert value > 0 && value < 12
      assert name != null
      assert name != ""

      this.suit = suit
      this.value = value
      this.name = name
      this.isAce = ace
  }

  String toString()
  {
    return name + " of " + suit
  }
}



//Class game is 
class Game 
{
  final keepPlaying = "n";
  // The master deck. We copy this array into the one we're using for the deal
  def DECK = [new Card(Suit.clubs, 2, "Two"),
       new Card(Suit.clubs, 3, "Three"),
       new Card(Suit.clubs, 4, "Four"),
       new Card(Suit.clubs, 5, "Five"),
       new Card(Suit.clubs, 6, "Six"),
       new Card(Suit.clubs, 7, "Seven"),
       new Card(Suit.clubs, 8, "Eight"),
       new Card(Suit.clubs, 9, "Nine"),
       new Card(Suit.clubs, 10, "Ten"),
       new Card(Suit.clubs, 10, "Jack"),
       new Card(Suit.clubs, 10, "Queen"),
       new Card(Suit.clubs, 10, "King"),
       new Card(Suit.clubs, 11, "Ace", true),
       new Card(Suit.diamonds, 2, "Two"),
       new Card(Suit.diamonds, 3, "Three"),
       new Card(Suit.diamonds, 4, "Four"),
       new Card(Suit.diamonds, 5, "Five"),
       new Card(Suit.diamonds, 6, "Six"),
       new Card(Suit.diamonds, 7, "Seven"),
       new Card(Suit.diamonds, 8, "Eight"),
       new Card(Suit.diamonds, 9, "Nine"),
       new Card(Suit.diamonds, 10, "Ten"),
       new Card(Suit.diamonds, 10, "Jack"),
       new Card(Suit.diamonds, 10, "Queen"),
       new Card(Suit.diamonds, 10, "King"),
       new Card(Suit.diamonds, 11, "Ace", true),
       new Card(Suit.hearts, 2, "Two"),
       new Card(Suit.hearts, 3, "Three"),
       new Card(Suit.hearts, 4, "Four"),
       new Card(Suit.hearts, 5, "Five"),
       new Card(Suit.hearts, 6, "Six"),
       new Card(Suit.hearts, 7, "Seven"),
       new Card(Suit.hearts, 8, "Eight"),
       new Card(Suit.hearts, 9, "Nine"),
       new Card(Suit.hearts, 10, "Ten"),
       new Card(Suit.hearts, 10, "Jack"),
       new Card(Suit.hearts, 10, "Queen"),
       new Card(Suit.hearts, 10, "King"),
       new Card(Suit.hearts, 11, "Ace", true),
       new Card(Suit.spades, 2, "Two"),
       new Card(Suit.spades, 3, "Three"),
       new Card(Suit.spades, 4, "Four"),
       new Card(Suit.spades, 5, "Five"),
       new Card(Suit.spades, 6, "Six"),
       new Card(Suit.spades, 7, "Seven"),
       new Card(Suit.spades, 8, "Eight"),
       new Card(Suit.spades, 9, "Nine"),
       new Card(Suit.spades, 10, "Ten"),
       new Card(Suit.spades, 10, "Jack"),
       new Card(Suit.spades, 10, "Queen"),
       new Card(Suit.spades, 10, "King"),
       new Card(Suit.spades, 11, "Ace", true)]

   
  void play()
  {

    // shuffle the deck
    def cards = new ArrayList<Card>(this.DECK)
    Collections.shuffle(cards)

    def dealer = new Dealer();
    def player = new Player();
   // deal the cards
    player.cards  << cards.remove(0)
    dealer.cards << cards.remove(0)
    player.cards << cards.remove(0)
    dealer.cards << cards.remove(0)
 

   // this.drawCard(cards,player,dealer);

    // this is a nifty reason to use Groovy
    def (int playerPts, boolean playerFirstRun) = player.play(player.cards, cards)
    def (int dealerPts, boolean dealerFirstRun) = dealer.play(dealer.cards, cards)

    this.displayResults(playerPts, playerFirstRun, dealerPts, dealerFirstRun)
  }
  //DrawCard is use for draw card to each player and display result.
  def drawCard (List cards, Player player, Dealer dealer)
  {
     
  }

  //Display Result is use for show result of each player
  /*
  * Displays the results of the game, depending on who won. Briefly:
  *  - If both players bust, dealer wins
   *  - If a player gets 21 on the initial deal, they win, unless both
   *    get 21 on first deal, in which case it's a tie
   *  - If players score the same number of points, it's a tie
   *  - The player who scores the highest without going over 21 wins
   */
  def displayResults(playerPts, playerFirstRun, dealerPts, dealerFirstRun)
  {
      // Both bust
      if (playerPts > 21 && dealerPts > 21)
      {
          println "Both players bust; dealer wins. Them\'s the rules"
      }
      // Player busts
      else if (playerPts > 21)
      {
          println "Player busts; dealer wins with ${dealerPts} points. Nice try."
      }
      // Dealer busts
      else if (dealerPts > 21)
      {
          println "Dealer busts; player wins with ${playerPts} points. Wicked."
      }
      // Player gets 21 on first deal
      else if (playerFirstRun && !dealerFirstRun)
      {
          println "Player wins with ${playerPts} points on initial deal. Sweet!"
      }
      // Dealer gets 21 on first deal
      else if (dealerFirstRun && !playerFirstRun)
      {
          println "Dealer wins with ${dealerPts} points on initial deal. Boo-ya!"
      }
      // Tie game (also handles case where they tie because of 21 on first deal)
      else if (playerPts == dealerPts)
      {
          println "It's a tie, with ${playerPts} points each."
      }
      // Player wins w/o busts
      else if (playerPts > dealerPts)
      {
          println "Player wins with ${playerPts} points. Well done."
      }
      // Dealer wins w/o busts
      else if (dealerPts > playerPts)
      {
          println "Dealer wins with ${dealerPts} points. In your face, player!"
      }
  }

  


}
class Utils
{
  /*
     * This method calculates the points value of a hand. It handles Ace
     * calculations automatically; if an Ace(s) with value 11 will put the user
     * over 21, then it auto-adjusts the value(s) down to 1.
     */
    int calculateValue(List<Card> cards)
    {
        value = 0
        aces = 0

        for (Card c : cards)
        {
            if (c.isAce)
            {
                aces++
            }

            value += c.value

            // This corrects for the case where 11 pts would put them over 21,
            // but since it's an Ace, we'll count it as 1 pt to keep them under.
            // Works for any number of aces in the hand.
            while (value > 21 && aces > 0)
            {
                value -= 10
                aces--
            }
        }

        return value
    }
}
//Class Player is use for player display
class Player {
  final points;
  final isFirstRun;
  final cards = [];

  /*
   * Method to play the human side of the deal. Will prompt the user whether
   * they want to hit or stand until they finally stand or bust.
   */
  def play(List player, List cards)
  {
    def playerTurn = true
    def playerPts = 0
    def playerFirstRun = true

    // player's turn
    while (playerTurn)
    {
      playerPts = calculateValue(player)

        println "Your cards: ${player.join(', ')}"

        if (playerFirstRun && playerPts == 21)
        {
          println "Blackjack! 21 points on your first deal. Congrats!"
            break
        }

      playerFirstRun = false

        if (playerPts > 21)
        {
          println "You went bust with $playerPts} points. Too bad.\n"
            break
        }

      choice = System.console().readLine(
          "You have $playerPts points. Would you like to (h)it or (s)tand? ")

        println "\n"
        choice = choice.toLowerCase()


        switch(choice)
        {
          case "h":
          case "hit":
            player << cards.remove(0)
              break

          case "s":
          case "stand":
              playerTurn = false
                break

          default:
                println "Invalid option: ${choice}. Type 'h' to hit; 's' to stand."
        }
    }

  outcome = (playerPts > 21) ? "busts" : "stands"
    println "Player ${outcome} with ${playerPts} points.\n"

    return [playerPts, playerFirstRun]
  }


}

//Class Dealer is use for Dealer display

class Dealer
{
  final cards = [];
  /*
   * Auto-plays the dealer's hand. Since the dealer has fixed rules, this
   * method requires no user interaction.
   */
  def play(List dealer, List cards)
  {
    def dealerTurn = true
    def dealerPts = 0
    def dealerFirstRun = true

    // dealer's turn; it's all automated
    while (dealerTurn)
    {
      dealerPts = calculateValue(dealer)

        println "Dealer cards: ${dealer.join(', ')}"

        if (dealerFirstRun && dealerPts == 21)
        {
          println "Blackjack! 21 points on the first deal. Go me!"
            break
        }

      dealerFirstRun = false

        if (dealerPts > 21)
        {
          println "Dealer went bust with ${dealerPts} points. Oh well.\n"
            break
        }

      switch(dealerPts)
      {
        case 1..16:
          println("Dealer has ${dealerPts} points and must hit.\n")
            dealer << cards.remove(0)
            break

        case 17..21:
            println("Dealer has ${dealerPts} points and must stand.\n")
              dealerTurn = false
              break
      }
    }

  outcome = (dealerPts > 21) ? "busts" : "stands"
    println "Dealer ${outcome} with ${dealerPts} points.\n"

    return [dealerPts, dealerFirstRun]
  }



}

game = new Game();
game.play();