Still have .pop method undefined?!

gistfile1.rb

# blackjack_oop.rb

# Requirements
# - Dealer has a deck of cards. The cards are shuffled and dealt to the Dealer and Player. The player and dealer calculate their hands. If dealer has 21, game is over. If player has 21, player wins. If both have 21, they tie (push). If neither, play continues

# If play continues, player is asked to hit or stay. If player hits, new card is dealt and new caluclation made for <21, ==21 or >21. If <21, player can hit or stay. If ==21, player wins or ties is dealer aslo has 21. If >21 player loses.

# If player stays, dealer takes turn. Dealer must hit if <=16, and wil stay at >=17. If dealer, busts, palyer wins. If dealer stays at >= 17 and does not bust, compare score to player. Player with higher score wins. Game resets.

# Major nouns:
# Deck, Player, Dealer, Hand, Game

require 'rubygems'
require 'pry'

class Card
  attr_accessor :suit, :face_value
    
  def initialize(s, fv)
    @suit = s
    @face_value = fv
  end

  def pretty_output
    "The #{face_value} of #{find_suit}"
  end

  def find_suit
    ret_val = case suit
                when 'H' then 'Hearts'
                when 'D' then 'Diamonds'
                when 'S' then 'Spades'
                when 'C' then 'Clubs'
              end
    ret_val
  end
end


class Deck
  attr_accessor :cards

  def initialize
    @cards = []
    ['H', 'D', 'C', 'S'].each do |suit|
      ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K', 'A'].each do |face_value|
        @cards << Card.new(suit, face_value) 
      end
    end
    scramble!
  end

  def scramble!
    cards.shuffle!
  end

  def deal_one
    cards.pop
  end

  def size
    cards.size
  end
end

module Hand
  def show_hand
    puts "---- #{name}'s Hand ----"
    cards.each do |card|
      puts "=> #{card.pretty_output}"
    end
    puts "---- Total is: #{total} ----"
  end

  def total
    face_values = cards.map{|card| card.face_value}

    total = 0
    face_values.each do |val|
      if val == 'A'
        total += 11
      else
          total += (val.to_i == 0 ? 10 : val.to_i)
      end
    end

    #Fix for the correct value of Aces
    face_values.select{|val| val == 'A'}.count.times do
      break if total <= 21
      total -= 10
    end

    total
  end

  def add_card(new_card)
    cards << new_card
  end

  def is_busted?
    total > 21
  end
end

class Player
  include Hand

  attr_accessor :name, :cards

  def initialize(n)
    @name = n
    @cards = []
  end

end

class Dealer
  include Hand

  attr_accessor :name, :cards

  def initialize
    @name = 'Dealer'
    @cards = []
  end
end

deck = Deck.new

binding.pry

puts "What's your name, stranger?"
name_input = gets.chomp

player = Player.new(name_input)
dealer = Dealer.new

player.add_card(deck.deal_one)
dealer.add_card(deck.deal_one)
player.add_card(deck.deal_one)
dealer.add_card(deck.deal_one)

player.show_hand
dealer.show_hand

######## From procedural ########
if player.total == 21
  puts "Nice! You hit blackjack. You win."
  exit
end

while player.total < 21
  puts "What do you want to do? 1)Hit 2)Stay?"
  hit_or_stay = gets.chomp

  if !["1","2"].include?(hit_or_stay)
    puts "Sorry, please enter 1 (Hit) or 2 (stay)"
    next
  end

  if hit_or_stay == "2"
    puts "You've chosen to stay."
    break
  end

#hit
  hit_card = deck.pop
  puts "You hit and get the card: #{hit_card}"
  player.cards << hit_card
  players_total = player.total
  puts "Your new total is #{players_total}"

  if players_total == 21
    puts "Nice! You hit blackjack. You win."
  elsif players_total > 21
    puts "Oh, snap! Looks like you busted. You lose."
    exit
  end
end

#Dealer turn
if dealer.total == 21
  puts "Dealer hits Blackjack. You lose."
  exit
end

while dealer.total <17
#hit
  hit_card = deck.pop
  puts "Dealer hits and get the card: #{hit_card}"
  dealer.cards << hit_card
  dealers_total = dealer.total
  puts "Dealer's new total is #{dealers_total}"

if dealers_total == 21
    puts "Damn! Dealer hit blackjack. You Lose."
  elsif dealers_total > 21
    puts "Dealer busted. You win."
    exit
  end
end

#compare hands
puts 
puts "Dealers cards are:"
dealer.cards.each do |card|
  puts "=> #{card}"
end
puts "Dealers total is #{dealers_total}"
puts ""

puts "Players cards are:"
player.cards.each do |card|
  puts "=> #{card}"
end
puts "Players total is #{players_total}"
puts ""

if players_total > dealers_total
  puts "You win!"
elsif players_total < dealers_total
  puts "You lose."
else
  puts "It's a push, you tie."
end