import { Router } from 'express';
import { getRepository, FindOperator, FindOneOptions, In } from 'typeorm';
import Media from '../entity/Media';
import { MediaStatus } from '../constants/media';
import logger from '../logger';
import { isAuthenticated } from '../middleware/auth';
import { Permission } from '../lib/permissions';
import { MediaResultsResponse } from '../interfaces/api/mediaInterfaces';

const mediaRoutes = Router();

mediaRoutes.get('/', async (req, res, next) => {
  const mediaRepository = getRepository(Media);

  const pageSize = req.query.take ? Number(req.query.take) : 20;
  const skip = req.query.skip ? Number(req.query.skip) : 0;

  let statusFilter:
    | MediaStatus
    | FindOperator<MediaStatus>
    | undefined = undefined;

  switch (req.query.filter) {
    case 'available':
      statusFilter = MediaStatus.AVAILABLE;
      break;
    case 'partial':
      statusFilter = MediaStatus.PARTIALLY_AVAILABLE;
      break;
    case 'allavailable':
      statusFilter = In([
        MediaStatus.AVAILABLE,
        MediaStatus.PARTIALLY_AVAILABLE,
      ]);
      break;
    case 'processing':
      statusFilter = MediaStatus.PROCESSING;
      break;
    case 'pending':
      statusFilter = MediaStatus.PENDING;
      break;
    default:
      statusFilter = undefined;
  }

  let sortFilter: FindOneOptions<Media>['order'] = {
    id: 'DESC',
  };

  switch (req.query.sort) {
    case 'modified':
      sortFilter = {
        updatedAt: 'DESC',
      };
      break;
    case 'mediaAdded':
      sortFilter = {
        mediaAddedAt: 'DESC',
      };
  }

  try {
    const [media, mediaCount] = await mediaRepository.findAndCount({
      order: sortFilter,
      where: {
        status: statusFilter,
      },
      take: pageSize,
      skip,
    });
    return res.status(200).json({
      pageInfo: {
        pages: Math.ceil(mediaCount / pageSize),
        pageSize,
        results: mediaCount,
        page: Math.ceil(skip / pageSize) + 1,
      },
      results: media,
    } as MediaResultsResponse);
  } catch (e) {
    next({ status: 500, message: e.message });
  }
});

mediaRoutes.delete(
  '/:id',
  isAuthenticated(Permission.MANAGE_REQUESTS),
  async (req, res, next) => {
    try {
      const mediaRepository = getRepository(Media);

      const media = await mediaRepository.findOneOrFail({
        where: { id: req.params.id },
      });

      await mediaRepository.remove(media);

      return res.status(204).send();
    } catch (e) {
      logger.error('Something went wrong fetching media in delete request', {
        label: 'Media',
        message: e.message,
      });
      next({ status: 404, message: 'Media not found' });
    }
  }
);

export default mediaRoutes;