texas_holdem.rb

require "ruby-poker"

class Player
  attr_reader :name, :cards
  attr_accessor :hand
  def initialize(name)
    @name = name
    @cards = []
    @hand = nil
  end
end

n_players = 3
players = n_players.times.collect.with_index do |i|
  Player.new("player#{i + 1}")
end

class Game
  attr_reader :players, :cards, :field_cards
  def initialize(players)
    @cards = []
    %w(S H D C).each do |mark|
      numbers = (2..9).to_a + %w(T J Q K A)
      numbers.each do |number|
        @cards << "#{number}#{mark}"
      end
    end
    @cards.shuffle!
    @field_cards = []
    @players = players
    2.times do
      @players.each do |player|
        player.cards << @cards.pop
      end
    end
  end

  def open
    @field_cards << @cards.pop
  end

  def make_hand(your_cards, field_cards)
    max_hand = nil
    field_cards.combination(3) do |cards|
      hand = PokerHand.new(your_cards + cards)
      max_hand ||= hand
      if hand > max_hand
        max_hand = hand
      end
    end
    max_hand
  end

  def winner(players=@players, field_cards=@field_cards)
    players.each do |player|
      player.hand = make_hand(player.cards, field_cards)
    end
    players.sort_by {|player| player.hand }.last
  end

  def percentage
    cards = @cards.dup
    players = @players.dup
    field_cards = @field_cards.dup
    winners = {}
    all = 0
    cards.combination(5 - field_cards.size) do |cards|
      winner = winner(players, field_cards + cards).name
      winners[winner] ||= {}
      winners[winner][:score] ||= 0
      winners[winner][:score] += 1
      all += 1
    end
    winners.each_entry do |name, status|
      winners[name][:percentage] = status[:score] * 100 / all
    end
    winners
  end
end

game = Game.new(players)
game.open
game.open
game.open

p game.players
p game.field_cards
p game.winner.name
p game.winner.hand.rank

game.open
p game.percentage