towers_of_hanoi.rb

#!/usr/bin/env ruby

# The individual pegs for the Towers of Hanoi game
# class Peg
#   attr_reader :rings

#   def initialize(rings)
#     @rings = rings
#   end

#   def last
#     @rings.last
#   end

#   def empty
#     @rings.empty
#   end

#   def pop
#     @rings.pop
#   end

#   def push(ring)
#     @rings.push ring
#   end
# end

# The actual game that puts the pegs together and interacts with them
class TowerGame
  attr_reader :pegs

  def initialize(rings = 3)
    @win = [*(1..rings)].reverse
    @left = @win_seq
    @middle = []
    @right = []
    @pegs = { 'left' => @left, 'middle' => @middle, 'right' => @right }
  end

  # def move(from, to)
  #   if to.empty? || from.last < to.last
  #     puts "Moving #{from.last} from #{from} to #{to}"
  #     to.push from.pop
  #   else
  #     puts 'Invalid move'
  #   end
  # end

  def move
    @left.push @right.pop
  end

  def show
    puts "Left Peg: #{@left}\n"\
      "Middle Peg: #{@middle}\n"\
      "Right Peg: #{@right}\n"
  end

  def win?
    @right == @win
  end
end

game1 = TowerGame.new(7)
game1.show
# game1.move(game1.pegs['left'], game1.pegs['right'])
game1.move
game1.show