beer_song.rb

# Problem: https://exercism.org/tracks/ruby/exercises/beer-song

# Solution
module BeerSong
    def self.recite(bottles, verses)
      output = []
      verses.times do
        output << verse(bottles)
        bottles -= 1
      end
      output.join("\n")
    end
    
    def self.verse(bottles)
      standard_verse = <<~TEXT
        #{bottles} bottles of beer on the wall, #{bottles} bottles of beer.
        Take one down and pass it around, #{bottles - 1} bottle#{'s' if bottles > 2 } of beer on the wall.
        TEXT
      single_bottle_verse = <<~TEXT
        1 bottle of beer on the wall, 1 bottle of beer.
        Take it down and pass it around, no more bottles of beer on the wall.
        TEXT
      no_bottles_verse = <<~TEXT
        No more bottles of beer on the wall, no more bottles of beer.
        Go to the store and buy some more, 99 bottles of beer on the wall.
        TEXT
      return no_bottles_verse if bottles.zero?
      bottles > 1 ? standard_verse : single_bottle_verse
    end
end