const fs = require('fs');
const dayjs = require('dayjs');

const username = process.env.EMAIL;
const token = process.env.CONFLUENCE_API_TOKEN;
const buffer = Buffer.from(`${username}:${token}`);
const auth = buffer.toString('base64');
const projectName = 'HOGE'

const PAST_DAYS = 160;

const request = async(path, params) => {
  const url = new URL(`https://${process.env.ATLASSIAN_DOMAIN}/${path}`);
  if (params) {
    url.search = new URLSearchParams(params).toString();
  }

  console.log(url.toString());

  return await fetch(url.toString(), {
    method: 'GET',
    headers: {
      'Authorization': `Basic ${auth}`,
      'Accept': 'application/json'
    }
  }).then(res => res.json());
}

const fetchIssues = async(startAt = 0) => {
  const data = await request(`rest/api/3/search`, {
    jql: `project = ${projectName} AND status = Done AND updated >= -${PAST_DAYS}d`,
    startAt,
    expand: 'changelog',
  })

  console.log(`startAt: ${data.startAt}, maxResults: ${data.maxResults}, total: ${data.total}`);

  const issues = data.issues.map(issue => {
    return {
      key: issue.key,
      id: issue.id,
      timeestimate: issue.fields.timeestimate,
      timespent: issue.fields.timespent,
      title: issue.fields.summary,
      created: issue.fields.created.split('.')[0],
      updated: issue.fields.updated.split('.')[0],
      storypoint: issue.fields.customfield_10001 || '',
      assignee: issue.fields.assignee?.displayName || '',
      issueType: issue.fields.issuetype.name || '',
      statusChanges: issue.changelog.histories,
    }
  }).map(row => {
    const minutes = (row.timespent || row.timeestimate || NaN) / 60;
    const hours = (minutes / 60).toFixed(2)

    return {
      ...row,
      url: `https://${process.env.ATLASSIAN_DOMAIN}/browse/${row.key}`,
      minutes,
      hours,
    }
  })

  if (data.startAt + data.maxResults < data.total) {
    return [...issues, ...(await fetchIssues(data.startAt + data.maxResults))]
  }

  return issues
}

const main = async() => {
  const issues = await fetchIssues(0);

  fs.writeFileSync('./issues.json', JSON.stringify(issues, null, 2), 'utf8');
}

main()