const jwt = require('jsonwebtoken')
const axios = require('axios')
const { execShellAsync, cleanupTmp } = require('../../common')

module.exports = async function (configuration) {
  const { workdir } = configuration.general
  const { organization, name, branch } = configuration.repository
  const github = configuration.github

  const githubPrivateKey = process.env.GITHUB_APP_PRIVATE_KEY.replace(/\\n/g, '\n').replace(/"/g, '')

  const payload = {
    iat: Math.round(new Date().getTime() / 1000),
    exp: Math.round(new Date().getTime() / 1000 + 60),
    iss: parseInt(github.app.id)
  }

  const jwtToken = jwt.sign(payload, githubPrivateKey, {
    algorithm: 'RS256'
  })
  const accessToken = await axios({
    method: 'POST',
    url: `https://api.github.com/app/installations/${github.installation.id}/access_tokens`,
    data: {},
    headers: {
      Authorization: 'Bearer ' + jwtToken,
      Accept: 'application/vnd.github.machine-man-preview+json'
    }
  })
  await execShellAsync(
      `mkdir -p ${workdir} && git clone -q -b ${branch} https://x-access-token:${accessToken.data.token}@github.com/${organization}/${name}.git ${workdir}/`
  )
  configuration.build.container.tag = (
    await execShellAsync(`cd ${configuration.general.workdir}/ && git rev-parse HEAD`)
  )
    .replace('\n', '')
    .slice(0, 7)
}