// Infer the current PR from the Travis environment, and look for bracketed,
// space-separated service names in the pull request title.
//
// Output the list of services.
//
// Pull request title: [travis sonar] Support user token authentication
//
// Output:
// travis
// sonar
//
// Example:
//
// TRAVIS=1 TRAVIS_REPO_SLUG=badges/shields TRAVIS_PULL_REQUEST=1108 npm run test:services:pr:prepare

'use strict'

const fetch = require('node-fetch')
const { inferPullRequest } = require('./infer-pull-request')
const servicesForTitle = require('./services-for-title')

async function getTitle(owner, repo, pullRequest) {
  let uri = `https://api.github.com/repos/${owner}/${repo}/pulls/${pullRequest}`
  if (process.env.GITHUB_TOKEN) {
    uri += `?access_token=${process.env.GITHUB_TOKEN}`
  }
  const options = { headers: { 'User-Agent': 'badges/shields' } }
  const res = await fetch(uri, options)
  if (!res.ok) {
    throw Error(`${res.status} ${res.statusText}`)
  }

  const { title } = await res.json()
  return title
}

async function main() {
  const { owner, repo, pullRequest, slug } = inferPullRequest()
  console.error(`PR: ${slug}`)

  const title = await getTitle(owner, repo, pullRequest)

  console.error(`Title: ${title}\n`)
  const services = servicesForTitle(title)
  if (services.length === 0) {
    console.error('No services found. Nothing to do.')
  } else {
    console.error(
      `Services: (${services.length} found) ${services.join(', ')}\n`
    )
    console.log(services.join('\n'))
  }
}

;(async () => {
  try {
    await main()
  } catch (e) {
    console.error(e)
    process.exit(1)
  }
})()