const logger = require('winston');
const { getClaimByClaimId, getClaimByName } = require('../controllers/serveController.js');
const { postToStats, sendGoogleAnalytics } = require('../controllers/statsController.js');
const errorHandlers = require('../helpers/libraries/errorHandlers.js');

function serveFile ({ fileName, fileType, filePath }, res) {
  logger.info(`serving file ${fileName}`);
  // set default options
  let options = {
    headers: {
      'X-Content-Type-Options': 'nosniff',
      'Content-Type'          : fileType,
    },
  };
  // adjust default options as needed
  switch (fileType) {
    case 'image/jpeg':
      break;
    case 'image/gif':
      break;
    case 'image/png':
      break;
    case 'video/mp4':
      break;
    default:
      logger.warn('sending file with unknown type as .jpeg');
      options['headers']['Content-Type'] = 'image/jpeg';
      break;
  }
  // send file
  res.status(200).sendFile(filePath, options);
}

function sendAnalyticsAndLog (headers, ip, originalUrl) {
  // google analytics
  sendGoogleAnalytics('serve', headers, ip, originalUrl);
}

module.exports = (app) => {
  // route to serve a specific asset
  app.get('/:name/:claim_id', ({ headers, ip, originalUrl, params }, res) => {
    sendAnalyticsAndLog(headers, ip, originalUrl);
    // begin image-serve processes
    getClaimByClaimId(params.name, params.claim_id)
      .then(fileInfo => {
        // check to make sure a file was found
        if (!fileInfo) {
          res.status(307).render('noClaims');
          return;
        }
        // serve the file or the show route
        if (headers['accept']) { // note: added b/c some requests errored out due to no accept param in header
          const mimetypes = headers['accept'].split(',');
          if (mimetypes.includes('text/html')) {
            postToStats('show', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
            res.status(200).render('showLite', { fileInfo });
          } else {
            postToStats('serve', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
            serveFile(fileInfo, res);
          }
        } else {
          postToStats('serve', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
          serveFile(fileInfo, res);
        }
      })
      .catch(error => {
        errorHandlers.handleRequestError('serve', originalUrl, ip, error, res);
      });
  });
  // route to serve the winning claim
  app.get('/:name', ({ headers, ip, originalUrl, params }, res) => {
    sendAnalyticsAndLog(headers, ip, originalUrl);
    // begin image-serve processes
    getClaimByName(params.name)
      .then(fileInfo => {
        // check to make sure a file was found
        if (!fileInfo) {
          res.status(307).render('noClaims');
          return;
        }
        // serve the file or the show route
        if (headers['accept']) { // note: added b/c some requests errored out due to no accept param in header
          const mimetypes = headers['accept'].split(',');
          if (mimetypes.includes('text/html')) {
            postToStats('show', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
            res.status(200).render('showLite', { fileInfo });
          } else {
            postToStats('serve', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
            serveFile(fileInfo, res);
          }
        } else {
          postToStats('serve', originalUrl, ip, fileInfo.name, fileInfo.claimId, 'success');
          serveFile(fileInfo, res);
        }
      })
      .catch(error => {
        errorHandlers.handleRequestError('serve', originalUrl, ip, error, res);
      });
  });
};