'use strict';

const logger = require('../../logger');
const { parse } = require('../../xml/event');
const {
  serialize: serializeDistributeEvent,
} = require('../../xml/event/distribute-event');

const {
  serialize: serializeOadrResponse,
} = require('../../xml/poll/oadr-response');

const { retrieveEvents, updateOptType } = require('../../processes/event');

exports.postController = async (req, res) => {
  const xmlRequest = req.body;
  let parsedRequest;
  let xmlResponse;
  let serialize = serializeOadrResponse;

  try {
    parsedRequest = await parse(xmlRequest);
    let response;
    switch (parsedRequest._type) {
      case 'oadrRequestEvent':
        serialize = serializeDistributeEvent;
        response = await retrieveEvents(
          parsedRequest,
          req.clientCertificateCn,
          req.clientCertificateFingerprint,
        );
        break;
      case 'oadrCreatedEvent':
        serialize = serializeOadrResponse;
        response = await updateOptType(
          parsedRequest,
          req.clientCertificateCn,
          req.clientCertificateFingerprint,
        );
        break;
      default:
        throw new Error(`Unknown _type: ${parsedRequest._type}`);
    }
    xmlResponse = serialize(response);
  } catch (e) {
    logger.warn('Error occurred processing', parsedRequest || xmlRequest, e);
    const responseRequestId =
      parsedRequest != null ? parsedRequest.requestId : '';
    xmlResponse = serialize({
      responseCode: e.responseCode || '454',
      responseDescription: e.message || 'Unknown error',
      responseRequestId: responseRequestId || '',
    });
  }
  res.set('Content-Type', 'application/xml');
  res.send(xmlResponse);
  res.end();
};

exports.postErrorHandler = (error, next) => {
  logger.warn('Error in EiEvent', { error });
  next(error);
};