import {
  Policy,
  RetryPolicy,
}                       from 'cockatiel'

import {
  log,
}           from './config.js'

/**
 * Create a retry policy that'll try whatever function we execute 3
 *  times with a randomized exponential backoff.
 *
 * https://github.com/connor4312/cockatiel#policyretry
 */
const retryPolicy = getRetryPolicy()
function getRetryPolicy (): RetryPolicy {
  const policy = Policy
    .handleAll()
    .retry()
    .attempts(3)
    .exponential()

  policy.onRetry(reason => log.silly('wechaty-token',
    'retry-policy getRetryPolicy policy.onRetry() reason: "%s"',
    JSON.stringify(reason),
  ))
  policy.onSuccess(({ duration }) => log.silly('wechaty-token',
    'retry-policy getRetryPolicy policy.onSuccess(): retry call ran in %s ms',
    duration,
  ))
  return policy
}

export {
  retryPolicy,
}