black_jack

gistfile1.rb

#!/usr/bin/env ruby
# encoding: UTF-8
class Blackjack

  SUITS = ['♠', '♣', '♥', '♦']
  VALUES = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A']

  def initialize
    @deck = []
    @player=[]
    @dealer=[]
    build_deck
    deal_cards
    show_cards(@player)    
  end
  def build_deck
    SUITS.each do |suit|
      VALUES.each do |value|
        @deck.push(value + suit)
      end
    end
    @deck.shuffle!    
  end
  def deal_cards
    2.times{@player << @deck.pop }
    2.times{@dealer << @deck.pop }   
    score(@player)
  end
  def show_cards(who)
    if who == @player 
      puts "Player's hand:  "
      puts @player 
      puts "Player's score is #{score(@player)}"
      turn
    else
      score(@dealer)
      puts "Dealer's hand:  "
      puts @dealer 
    end
  end
  def turn
    if score(@player) > 21
        puts 'You busted!'
        return nil
    end
    puts ''
    puts 'Hit (h) or Stay (s): '
    input = gets.chomp
    if input == 'h'
      hit(@player)
    elsif input == 's'  
      dealer_plays
    else
      p 'invalid'
      turn
    end
  end
  def hit(user)
    user << @deck.pop
    score(user)
    show_cards(user)
  end
  def dealer_plays
  score(@dealer)
    puts "Dealer score: #{score(@dealer)} "
    if score(@dealer) < 17
      hit(@dealer)      
      dealer_plays
    elsif score(@dealer) >= 17 && score(@dealer) <= 21
      winner
    elsif score(@dealer) > 21
      puts 'Dealer Busts'
      puts 'Player wins!' 
    end     
  end
  def score(who)
    who.sort_by!{ |card| VALUES.index(card.chop) }
    hand_total = 0
    who.each do |card|
      case card.chop
      when ('2'..'10')
        hand_total += card.chop.to_i
      when 'J','Q','K'
        hand_total += 10
      when 'A'
        if hand_total + 11 > 21
          hand_total += 1
        else
          hand_total += 11
        end
      end    
    end
    return hand_total
    show_cards
  end 
  def winner
      puts ""
      puts "------------------------------"
      puts "Your score: #{score(@player)}"
      puts ""
      puts "Dealer score: #{score(@dealer)}"
      if score(@player) == score(@dealer)
        puts 'Tie game!'
      elsif score(@player) < score(@dealer)
        puts 'Dealer wins!'
      elsif score(@player) > score(@dealer)
        puts 'Player wins!'      
      end
  return nil
  end
end
game = Blackjack.new
game.build_deck