import { Router } from 'express';
import { getRepository, FindOperator } from 'typeorm';
import Media from '../entity/Media';
import { MediaStatus } from '../constants/media';

export interface MediaResultsResponse {
  pageInfo: {
    pages: number;
    page: number;
    results: number;
    pageSize: number;
  };
  results: Media[];
}

const mediaRoutes = Router();

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

  const pageSize = Number(req.query.take) ?? 20;
  const 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 'processing':
      statusFilter = MediaStatus.PROCESSING;
      break;
    case 'pending':
      statusFilter = MediaStatus.PENDING;
      break;
    default:
      statusFilter = undefined;
  }

  try {
    const [media, mediaCount] = await mediaRepository.findAndCount({
      order: {
        id: 'DESC',
      },
      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 });
  }
});

export default mediaRoutes;