'use strict';

const { Ven } = require('../db');
const { v4 } = require('uuid');
const { vtnId } = require('../config');
const logger = require('../logger');

async function registerParty(
  obj,
  clientCertificateCn,
  clientCertificateFingerprint,
) {
  logger.info(
    'registerParty',
    obj,
    clientCertificateCn,
    clientCertificateFingerprint,
  );

  const requestVenId = obj.venId;

  if (!requestVenId) {
    const error = new Error('No VenID in request.');
    error.responseCode = 452;
    throw error;
  }

  if (requestVenId !== clientCertificateFingerprint) {
    // as per certification item #512, venId MUST be case-sensitive
    const error = new Error('VenID does not match certificate.');
    error.responseCode = 452;
    throw error;
  }

  if (!clientCertificateCn) {
    const error = new Error('Could not determine CN from client certificate.');
    error.responseCode = 452;
    throw error;
  }

  let registrationId, venId;

  const existingDbRecordByVenId = await Ven.findOne({
    where: { ven_id: requestVenId },
  });
  const existingDbRecordByCommonName = await Ven.findOne({
    where: { common_name: clientCertificateCn },
  });

  if (existingDbRecordByVenId) {
    if (existingDbRecordByVenId.common_name !== clientCertificateCn) {
      const error = new Error('Client certificate CN mismatch.');
      error.responseCode = 452;
      throw error;
    }
    registrationId = existingDbRecordByVenId.data.registrationId;
    venId = existingDbRecordByVenId.ven_id;
  } else if (existingDbRecordByCommonName) {
    const error = new Error('Ven already exists with that CN.');
    error.responseCode = 452;
    throw error;
  } else {
    registrationId = v4().replace(/-/g, '');
    venId = requestVenId;
    const newVen = new Ven();
    newVen.common_name = clientCertificateCn;
    newVen.ven_id = requestVenId;
    newVen.data = {
      registrationId: registrationId,
    };
    await newVen.save();
  }

  return {
    responseRequestId: obj.requestId || '',
    responseCode: 200,
    responseDescription: 'OK',
    registrationId: registrationId,
    venId: venId,
    vtnId: vtnId,
    pollFreqDuration: 'PT10S',
  };
}

module.exports = {
  registerParty,
};