bottlesOfBeer.js

const pluralize = (str, n) => str + (n !== 1 ? 's' : '')
const bottleText = n => `${n || 'No more'} ${pluralize('bottle', n)}`

function sing (start = 99, stop = 0) {
  const [currentBottles, remainingBottles] = [bottleText(start), bottleText(start - 1)]

  console.log(`${currentBottles} of beer on the wall, ${currentBottles.toLowerCase()} of beer.`)

  if (!start) {
    return console.log('Go to the store and buy some more, 99 bottles of beer on the wall')
  }

  console.log(`Take one down and pass it around, ${remainingBottles.toLowerCase()} of beer on the wall\n`)

  if (start !== stop) {
    sing(--start, stop)
  }
}

module.exports = {
  song: () => sing(),
  verses: (start, stop) => sing(start, stop),
  verse: verse => sing(verse, verse)
}