'use strict'

const co = require('co')
const cli = require('heroku-cli-util')

function * run (context, heroku) {
  const pgbackups = require('../../lib/pgbackups')(context, heroku)
  const host = require('../../lib/host')()
  const { sortBy } = require('lodash')

  const { app, args } = context

  let transfer
  if (args.backup_id) {
    let num = yield pgbackups.transfer.num(args.backup_id)
    if (!num) throw new Error(`Invalid backup: ${args.backup_id}`)
    transfer = yield heroku.get(`/client/v11/apps/${app}/transfers/${num}`, { host })
  } else {
    let transfers = yield heroku.get(`/client/v11/apps/${app}/transfers`, { host })
    transfer = sortBy(transfers, 'created_at').reverse().find(t => !t.finished_at)
    if (!transfer) throw new Error('No active backups/transfers')
  }

  return cli.action(`Cancelling ${pgbackups.transfer.name(transfer)}`,
    heroku.post(`/client/v11/apps/${app}/transfers/${transfer.uuid}/actions/cancel`, { host }))
}

module.exports = {
  topic: 'pg',
  command: 'backups:cancel',
  description: 'cancel an in-progress backup or restore (default newest)',
  needsApp: true,
  needsAuth: true,
  args: [{ name: 'backup_id', optional: true }],
  run: cli.command({ preauth: true }, co.wrap(run))
}