import WebSocket from 'ws';

process.on('SIGINT', () => process.exit(0));

const apiKey = process.env['CTDO_WIKIJS_API_KEY'];

async function graphql(query) {
  const res = await fetch('https://wiki.ctdo.de/graphql', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization: `Bearer ${apiKey}`,
    },
    body: JSON.stringify({ query }),
  });
  return await res.json();
}

function graphqlSubscribe(query, callback) {
  const ws = new WebSocket(
    'wss://wiki.ctdo.de/graphql-subscriptions',
    'graphql-ws'
  );
  ws.onmessage = (event) => callback(JSON.parse(event.data));
  ws.onopen = () => {
    ws.send(JSON.stringify({ type: 'connection_init' }));
    ws.send(
      JSON.stringify({
        id: '1',
        type: 'start',
        payload: { query: `subscription ${query}` },
      })
    );
  };
}

async function update() {
  const pageIds = (
    await graphql('query { pages { list(tags: ["metapage"]) { id } } }')
  ).data.pages.list.map((page) => page.id);
  console.log('checking metapages', { pageIds });
  pageIds.forEach((pageId) => updatePage(pageId));
}

async function updatePage(pageId) {
  console.log('checking page', { pageId });

  const page = (
    await graphql(`query { pages { single(id: ${pageId}) {
      id
      content
      description
      editor
      isPrivate
      isPublished
      locale
      path
      publishEndDate
      publishStartDate
      scriptCss
      scriptJs
      tags { tag }
      title
    } } }`)
  ).data.pages.single;
  page.tags = page.tags.map((tag) => tag.tag);

  let contentLines = page.content.split('\n');
  const pagelistConfigs = contentLines.filter((line) =>
    line.match(/^\s*<!--\s*\\pagelist[^>]*-->\s*$/)
  );

  for (const pagelistConfig of pagelistConfigs) {
    await updatePagelist(pagelistConfig, contentLines);
  }

  const updatedContent = contentLines.join('\n');

  if (page.content !== updatedContent) {
    page.content = updatedContent;
    console.log('updating page');
    console.log({ page });
    const mutation = Object.entries(page)
      .map(([key, value]) => `${key}: ${JSON.stringify(value)}`)
      .join(', ');
    const result = await graphql(
      `mutation { pages { update(${mutation}) { responseResult { succeeded, message, errorCode } } } }`
    );
    console.log({ result: JSON.stringify(result) });
  }
}

async function updatePagelist(pagelistConfig, contentLines) {
  const query = pagelistConfig
    .replace(/^\s*<!--\s*\\pagelist\s*/, '')
    .replace(/\s*-->\s*$/, '');

  const result = (
    await graphql(`query { pages { list(${query}) { path, title, tags } }}`)
  ).data.pages.list
    .filter((page) => !page.path.includes('/_'))
    .filter((page) => !page.tags.includes('metapage'))
    .map((page) => `- [${page.title}](/${page.path})`);

  console.log({ pagelistConfig, query, result });

  const startIndex = contentLines.findIndex((line) => line == pagelistConfig);
  let endIndex = startIndex + 1;
  while (
    endIndex < contentLines.length &&
    contentLines[endIndex].startsWith('- ')
  ) {
    endIndex++;
  }
  contentLines.splice(
    startIndex,
    endIndex - startIndex,
    `<!-- \\pagelist ${query} -->`,
    ...result
  );
}

async function main() {
  await update();

  graphqlSubscribe('{ loggingLiveTrail { output } }', async (message) => {
    if (
      message.type === 'data' &&
      message.payload.data.loggingLiveTrail.output.includes(
        'Committing updated file'
      )
    ) {
      await update();
    }
  });
}

main();