gistfile1.txt

class Bottles
  def song
    verses(99, 0)
  end

  def verses(start, finish)
    start.downto(finish).map {|i| verse(i)}.join("\n")
  end

  def verse(number)
    count = BottleCount.new(number)
    next_count = BottleCount.new(count.remainder)

    "#{count.name.capitalize} #{count.unit} of beer on the wall,"\
    " #{count.name} #{count.unit} of beer.\n#{count.action}, "\
    "#{next_count.name} #{next_count.unit} of beer on the wall.\n"
  end
end

class BottleCount
  attr_reader :count

  def initialize(count)
    @count = count
  end

  def action
    if count == 0
      "Go to the store and buy some more"
    else
      "Take #{pronoun} down and pass it around"
    end
  end

  def name
    if count == 0
      "no more"
    else
      count.to_s
    end
  end

  def pronoun
    if count == 1
      'it'
    else
      'one'
    end
  end

  def remainder
    if count == 0
      99
    else
      count - 1
    end
  end

  def unit
    if count == 1
      'bottle'
    else
      "bottles"
    end
  end
end