const fs = require('fs')

const re = /(\d+)\s(\w+)\s(\d+)/
const months = {
  January: '01',
  February: '02',
  March: '03',
  April: '04',
  May: '05',
  June: '06',
  July: '07',
  August: '08',
  September: '09',
  October: '10',
  November: '11',
  December: '12',
}

const folders = fs.readdirSync('.').filter(folder => {
  const meta = folder.split(',').map(f => f.trim())
  return re.test(meta[meta.length - 1])
})

folders.forEach(folder => {
  let [date, place, location] = folder
    .split(',')
    .reverse()
    .map(f => f.trim())
  const [, day, month, year] = re.exec(date)
  const formatted = [
    `${year}-${months[month]}-${('0' + day).slice(-2)}`,
    place,
    location,
  ]
    .filter(d => !!d)
    .join(', ')

  fs.renameSync(folder, formatted)
})