import jsonServer from 'json-server';

const server = jsonServer.create();
const router = jsonServer.router('api.json');
const middlewares = jsonServer.defaults();

server.use(middlewares);

server.use(
  jsonServer.rewriter({
    '/api/*': '/$1',
    '*sort=services*': '$1sort=services[0].name$2',
    '*sort=organizations*': '$1sort=organizations[0].address.city$2',
    '/employee*search=*': '/employee$1fullName_like=$2',
    '/employee*': '/employees$1',
    '/participants': '/participants?_embed=employees',
    '/participant/:id': '/participants/:id?_embed=employees',
    '/auth': '/currentUser',
    '/customerinfo/*/*': '/deltagare/$2',
    '/customerinfo': '/deltagare',
    '*page=*': '$1_page=$2',
    '*limit=*': '$1_limit=$2',
    '*sort=*': '$1_sort=$2',
    '*order=*': '$1_order=$2',
    '/auth/token?accessCode=auth_code_from_CIAM_with_all_permissions': '/getTokenFullAccess',
  })
);

router.render = (req, res) => {
  const pathname = req._parsedOriginalUrl.pathname;
  // all paths except /auth/token requires Authorization header.
  if (!pathname.includes('/auth/token') && !req.headers.authorization) {
    return res.status(401).jsonp({ error: 'No valid access-token' });
  }

  const params = new URLSearchParams(req._parsedUrl.query);

  // Add createdAt to the body
  if (req.originalMethod === 'POST') {
    req.body.createdAt = Date.now();
  }

  if (pathname.includes('/auth/token')) {
    res.jsonp(res.locals.data);
  } else {
    let data = res.locals.data;
    const deltagareRegex = /(?:\/customerinfo\/)(contact|driverlicense|education\/highest|education|translator|work\/disability|work\/languages)/g;
    const isDeltagarePath = deltagareRegex.exec(pathname);

    if (isDeltagarePath) {
      const deltagareSubPath = getDeltagareSubPath(isDeltagarePath[1]);
      data = res.locals.data[deltagareSubPath] || {};
    }
    res.jsonp({
      data,
      ...appendMetaData(params, res),
    });
  }
};

server.use(router);
server.listen(8000, () => {
  console.info('JSON Server is running');
});

function appendMetaData(params, res) {
  if (params.has('_page')) {
    const limit = +params.get('_limit');
    const page = +params.get('_page');
    const count = res.get('X-Total-Count');
    const totalPages = Math.ceil(count / limit);
    return {
      meta: {
        count,
        limit,
        page,
        totalPages,
      },
    };
  }

  return null;
}

function getDeltagareSubPath(path) {
  switch (path) {
    case 'education/highest':
      return 'highestEducation';
    case 'work/disability':
      return 'disabilities';
    case 'work/languages':
      return 'workLanguages';
    default:
      return path;
  }
}