import { NextApiRequest, NextApiResponse } from 'next';

export async function revalidate(
  request: NextApiRequest,
  response: NextApiResponse,
) {
  let slug = request.query.slug as string;
  const secret = request.query.secret as string;

  // Validate secret.
  if (secret !== process.env.DRUPAL_PREVIEW_SECRET) {
    return response.status(401).json({ message: 'Invalid secret.' });
  }

  // Validate slug.
  if (!slug) {
    return response.status(400).json({ message: 'Invalid slug.' });
  }

  // Fix for home slug.
  if (slug === process.env.NEXT_PUBLIC_DRUPAL_FRONT_PAGE) {
    slug = '/';
  }

  try {
    await response.revalidate(slug);

    return response.json({});
  } catch (error) {
    return response.status(404).json({
      message: error.message,
    });
  }
}