review_blackjack.rb

class Deck
  SUITS = ['♠', '♣', '♥', '♦']
  VALUES = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A']
 
  def initialize
    @cards = []
 
    SUITS.each do |suit|
      VALUES.each do |value|
        @cards.push(Card.new(value,suit))
      end
    end
 
    @cards.shuffle!
  end
  
  def deal_card
    @cards.pop
  end
 
end
 
class Card
  attr_reader :value, :suit
  def initialize(value, suit)
    @value = value
    @suit = suit
  end
end
 
class Hand
 
  def initialize(player_title)
    @player_title = player_title
    @cards_in_hand = []
  end
 
  def hit(card)
    @cards_in_hand << card
  end
 
  def stay
    puts "#{@player_title} score is #{self.score}"
  end
 
  def score
    score = 0
    has_ace = false

    @cards_in_hand.each do |card|
      if card.value == 'A'
        score += 1
        has_ace = true
      elsif card.value == "K" || card.value == "Q" || card.value == "J"
        score += 10
      else
        score += card.value.to_i
      end
    end

    if has_ace && score <= 11
      score += 10
    end

    return score
  end
 
  def bust?
    score > 21
  end
 
  def display_hand
    if @cards_in_hand.length <= 2
      @cards_in_hand.each do |card|
        puts "#{@player_title} was dealt #{card.value} #{card.suit}"
      end
    else
      puts "#{@player_title} was dealt #{@cards_in_hand.last.value} #{@cards_in_hand.last.suit}"
    end
  end
end

class Blackjack
  def self.run
    deck = Deck.new
    player = Hand.new("Player")
    dealer = Hand.new("Dealer")

    # Initial Deal
    2.times {player.hit(deck.deal_card)}
    2.times {dealer.hit(deck.deal_card)}

    puts "---------Welcome to BlackJack--------"

    puts ""

    while player.score < 22

      player.display_hand

      puts "Player score #{player.score}"
      puts ""
      print "Hit or stand (H/S):"

      move = gets.chomp

      puts ""

      if move.upcase == 'H'
        player.hit(deck.deal_card)
      elsif move.upcase == 'S'
        player.stay
        break
      end

      if player.bust?
        player.display_hand
        puts "Player score #{player.score}"
        puts ""
        puts "Bust! You lose..."
        exit
      end
    end

    while true
      dealer.display_hand

      puts "Dealer score #{dealer.score}"
      puts ""

      if dealer.score < 17
        dealer.hit(deck.deal_card)
      elsif dealer.bust?
        puts "Dealer busts! You win!"
        exit
      else
        puts "Dealer stands"
        puts ""
        dealer.stay
        break
      end
    end

    if player.score <= 21 && dealer.score <= 21
      if player.score > dealer.score
        puts "You win!"
      else
        puts "You lose!"
      end
    end
  end
end

Blackjack.run