// @flow
import debug from 'debug';
import Router from 'koa-router';
import subDays from 'date-fns/sub_days';
import { AuthenticationError } from '../errors';
import { Document, Attachment } from '../models';
import { Op } from '../sequelize';

const router = new Router();
const log = debug('utils');

router.post('utils.gc', async ctx => {
  const { token } = ctx.body;

  if (process.env.UTILS_SECRET !== token) {
    throw new AuthenticationError('Invalid secret token');
  }

  log('Permanently deleting documents older than 30 days…');

  const where = {
    deletedAt: {
      [Op.lt]: subDays(new Date(), 30),
    },
  };

  const documents = await Document.scope('withUnpublished').findAll({
    attributes: ['id'],
    where,
  });
  const documentIds = documents.map(d => d.id);

  await Attachment.destroy({
    where: {
      documentId: documentIds,
    },
  });

  await Document.scope('withUnpublished').destroy({
    where,
    force: true,
  });

  log(`Deleted ${documentIds.length} documents`);

  ctx.body = {
    success: true,
  };
});

export default router;