import assert from 'node:assert';
import BoxError from '../boxerror.js';
import http from 'node:http';
import { HttpError } from '@cloudron/connect-lastmile';
import safe from 'safetydance';
import services from '../services.js';


function proxy(kind) {
    assert(kind === 'mail' || kind === 'volume' || kind === 'app');

    return async function (req, res, next) {
        req.clearTimeout();

        let id = null;
        switch (kind) {
        case 'app': id = `app-${req.params.id}`; break;
        case 'volume': id = `volume-${req.params.id}`; break;
        case 'mail': id = 'mail'; break;
        }

        const [error, addonDetails] = await safe(services.getContainerDetails('sftp', 'CLOUDRON_SFTP_TOKEN'));
        if (error) return next(BoxError.toHttpError(error));

        const searchParams = new URLSearchParams(req.url.slice(req.url.indexOf('?')+1));
        searchParams.delete('access_token');
        searchParams.append('access_token', addonDetails.token);

        const filepath = req.params.filepath.join('/');
        const opts = {
            hostname: addonDetails.ip,
            port: 3000,
            path: `/files/${id}/${encodeURIComponent(filepath)}?${searchParams.toString()}`, // params[0] already contains leading '/'
            method: req.method,
            headers: req.headers
          };

          const sftpReq = http.request(opts, function (sftpRes) {
              res.writeHead(sftpRes.statusCode, sftpRes.headers);
              // note: these are intentionally not handled. response has already been written. do not forward to connect-lastmile
              // sftpRes.on('error', (error) => next(new HttpError(500, `filemanager error: ${error.message} ${error.code}`)));
              // sftpRes.on('end', () => next());
              sftpRes.pipe(res);
          });
          sftpReq.on('error', (reqError) => next(new HttpError(424, `Unable to connect to filemanager: ${reqError.message} ${reqError.code}`)));
          if (!req.readable) {
              sftpReq.end();
          } else {
              req.pipe(sftpReq);
          }
      };
}

export default {
    proxy,
};