/**
 * @typedef {import('@octokit/rest').Octokit} Octokit
 * @typedef {import('@actions/github')['context']} Context
 */

module.exports = async function updateNoticeYear(
  /** @type {{ octokit: Octokit, context: Context }} */
  { octokit, context }
) {
  const now = new Date()
  // Change to UTC+8
  now.setHours(now.getHours() + 8)
  const newYear = now.getFullYear()
  console.log('Prepare to update notice year to', newYear)

  const noticeContent = `Apache ECharts
Copyright 2017-${newYear} The Apache Software Foundation

This product includes software developed at
The Apache Software Foundation (https://www.apache.org/).`

  const repoCtx = context.repo

  const repoInfo = (await octokit.rest.repos.get(repoCtx)).data
  const defaultBranchName = repoInfo.default_branch
  const remoteNoticeFile = (await octokit.rest.repos.getContent({
    ...repoCtx,
    path: 'NOTICE',
    ref: defaultBranchName
  })).data
  const remoteNoticeContent = base64ToUtf8(remoteNoticeFile.content)
  if (remoteNoticeContent === noticeContent) {
    console.log('NOTICE year is already updated.')
    return
  }

  console.log('Ready to update the NOTICE file:\n' + noticeContent)

  const defaultBranch = (await octokit.rest.repos.getBranch({
    ...repoCtx,
    branch: defaultBranchName
  })).data

  const newBranchName = `bot/update-notice-year/${newYear}`
  await octokit.rest.git.createRef({
    ...repoCtx,
    ref: `refs/heads/${newBranchName}`,
    sha: defaultBranch.commit.sha
  })
  console.log('Created a new branch:', newBranchName)

  await octokit.rest.repos.createOrUpdateFileContents({
    ...repoCtx,
    path: 'NOTICE',
    message: `chore: update NOTICE year to ${newYear}`,
    content: utf8ToBase64(noticeContent),
    sha: remoteNoticeFile.sha,
    branch: newBranchName
  })

  console.log('Updated the NOTICE file on the new branch')

  const pr = (await octokit.rest.pulls.create({
    ...repoCtx,
    head: newBranchName,
    base: defaultBranchName,
    maintainer_can_modify: true,
    title: `chore: update NOTICE year to ${newYear}`,
    body: `## Brief Information

This pull request is in the type of:

- [ ] bug fixing
- [ ] new feature
- [x] others

### What does this PR do?

Update notice year to ${newYear}. 💖

Happy new year! 祝大家新年快乐！🎇`
  })).data

  console.log(`Opened PR #${pr.number} for updating the NOTICE file`)
}

function utf8ToBase64(data) {
  return Buffer.from(data, 'utf-8').toString('base64')
}

function base64ToUtf8(data) {
  return Buffer.from(data, 'base64').toString('utf-8')
}