const MemCache = require('mem-cache')
const slackGitHubCache = new MemCache({ timeoutDisabled: true })
const SlackGitHubCacheBuilder = require('./lib/retrieve-slack-github-users')
const Slack = require('./lib/slack')

module.exports = async (robot) => {
  console.log('Yay, the app was loaded!')

  Slack(robot, slack => {})

  await new Promise((resolve, reject) => {
    robot.on('slack.connected', event => {
      robot.log.info(`Connected to Slack`)

      // Copy Slack RTM and Slack Web clients to the robot object
      robot['slack'] = event.payload.slack
      robot['slackWeb'] = event.payload.slackWeb
      resolve()
    })
  })

  const slackCachePromise = SlackGitHubCacheBuilder.build(robot, slackGitHubCache)

  require('./bot_scripts/assign-new-pr-to-review')(robot)
  require('./bot_scripts/assign-approved-pr-to-test')(robot)
  require('./bot_scripts/assign-to-bounty-awaiting-for-approval')(robot)
  require('./bot_scripts/greet-new-contributor')(robot)
  require('./bot_scripts/trigger-automation-test-build')(robot)

  await slackCachePromise
  robot.log.info('Slack user ID cache populated, loading remainder of scripts')

  // Add scripts which require using the Slack/GitHub cache after this comment
  require('./bot_scripts/bounty-awaiting-approval-slack-ping')(robot, getSlackMentionFromGitHubId)
  require('./bot_scripts/notify-reviewers-via-slack')(robot, getSlackIdFromGitHubId)

  // For more information on building apps:
  // https://probot.github.io/docs/

  // To get your app running against GitHub, see:
  // https://probot.github.io/docs/development/
}

function getSlackMentionFromGitHubId (gitHubId) {
  const id = SlackGitHubCacheBuilder.getSlackIdFromGitHubId(gitHubId, slackGitHubCache)
  if (!id) {
    return null
  }
  return `<@${id}>`
}

function getSlackIdFromGitHubId (gitHubId) {
  return SlackGitHubCacheBuilder.getSlackIdFromGitHubId(gitHubId, slackGitHubCache)
}