rock paper scissors solutions

gistfile1.rb

# Rock Paper Scissors (OOP)

# both players pick a hand of either "paper", "rock", "scissors". 
# then hands are compared and its either a tie (if hands are the same) or p > r, r > s, s > p.

# classes:

# Player,
# Hand

class Hand
  include Comparable 

  attr_reader :value 

  def initialize(v)
    @value = v
  end

  def <=>(another_hand)
    if @value == another_hand.value
      0
    elsif (@value == 'p' && another_hand.value == 'r') || (@value == 'r' && another_hand.value == 's') || (@value == 's' && another_hand.value == 'p')
      1
    else
      -1
    end
  end

  def display_winning_message
    case @value
    when "p"
      puts "Paper wraps Rock!"
    when "r"
      puts "Rock smashes Scissors"
    when "s"
      puts "Scissors cuts Paper!"
    end
    
  end
end

class Player

  attr_reader :name
  attr_accessor :hand 

  def initialize(n)
    @name = n
  end

  def to_s
    "#{name} currently has a choice of #{self.hand.value}"
  end
end

class Human < Player
  def pick_hand
    begin
      puts "Pick one: (p, r, s):"
      c = gets.chomp.downcase
    end until Game::CHOICES.keys.include?(c)

    self.hand = Hand.new(c)
  end
end

class Computer < Player
  def pick_hand
    self.hand = Hand.new(Game::CHOICES.keys.sample)
  end
end

class Game
  CHOICES = {"p" => "Paper", "r" => "Rock", "s" => "Scissors"}

  attr_reader :player, :computer 

  def initialize
    @player = Human.new("Bob")
    @computer = Computer.new("Comp")
  end

  def compare_hands
    if player.hand == computer.hand
      puts "It's a tie!"
    elsif player.hand > computer.hand
      player.hand.display_winning_message
      puts "#{player.name} won!"
    else
      computer.hand.display_winning_message
      puts "#{computer.name} won!"
    end
  end

  def play
    player.pick_hand
    computer.pick_hand
    compare_hands

    puts player
    puts computer
  end

end

game = Game.new.play