let {
  Pledge,
  makeSerialiser,
} = require('./server')

function generateBackoutLink(email, unsubscribe=true) {
  let serialiser = makeSerialiser(email)

  // format "unsubscribe" for serialisation
  let staySubscribed
  if (unsubscribe) {
    staySubscribed = 'no'
  } else {
    staySubscribed = 'yes'
  }

  let verificationLink = `https://fund.snipettemag.com/back-out?email=${encodeURIComponent(email)}&key=${encodeURIComponent(serialiser.dumps(staySubscribed))}`

  return verificationLink
}

async function generateBackoutLinks(unsubscribe=true) {

  // get list of pledges
  let pledges = (
    await Pledge
    .forge()
    .orderBy('created_at', 'DESC')
    .fetchAll()
  ).models

  let verificationLinks = []

  // get the links
  pledges.forEach((pledge) => {
    verificationLinks.push(
      generateBackoutLink(pledge.get('email'), unsubscribe)
    )
  })

  return verificationLinks
}

if (!module.parent) {
    // figure out if we should unsubscribe
    let unsubscribe

    if (process.argv[2] == 'yes' || process.argv[2] == 'stay-subscribed') {
      console.log('Backing out but staying subscribed')
      unsubscribe = false
    } else {
      console.log('Backing out and unsubscribing')
      unsubscribe = true
    }

    // get the links and print 'em out
    generateBackoutLinks(unsubscribe).then((links) => {
      links.forEach(link => console.log(link))
      return
    })
}