const { shuffle, map } = require('lodash')
const { sendMessages } = require('./send-email')

const input = shuffle(require('./input.json'))

function assign (array) {
  return map(array, (person, index, array) => {
    const friend = array[index + 1] || array[0]
    return {
      person,
      friend
    }
  })
}

sendMessages(assign(input))
  .then(result => {
    console.log(result)
  })
  .catch(err => {
    console.error(err)
  })