const uploadVideo = Multer({
      storage: MulterStorage,
      limits: {
        fileSize: 5 * 1024 * 1024, // no larger than 5mb, you can change as needed.
      },
      fileFilter: (req, file, cb) => {
        console.log('FILE', file);
        const mimetype = file.mimetype.split('/')[0];
        console.log('FILE', mimetype);

        if (mimetype !== 'video') {
          cb('Error: File is not an video');
        }

        return cb(null, true);
      },
    }).single('blob');

    const server = express();
    server.use(cors());

    server.post('/upload/video', async (req, res) => {
      await uploadVideo(req, res, async (error) => {
        console.log('START');
        try {
          if (error) {
            console.log('ERROR', error);
            throw new Error('Multer error');
          }

          const { file } = req;
          const item = FBStorage.file(file.filename);

          console.log('RESPONSE');
      const [response] = await item.setMetadata({
        metadata: {
          contentType: file.mimetype,
          cacheControl: 'public, max-age=600',
        },
      });

          await FBDatabase.ref(`/video/${response.md5Hash}`).update({
            key: response.md5Hash,
            name: response.name,
            selfLink: response.selfLink,
            timeCreated: response.timeCreated,
            updated: response.updated,
            size: response.size,
          });

          console.log('SEND');
          return res.status(200).send({ md5Hash: response.md5Hash });
        } catch (err) {
          console.log('ERROR', err);

          return res.status(400).send({ message: 'Bad Request' });
        }
      });
    });

    const api = functions.https.onRequest((req, res) => server(req, res));

    export default api;