'use strict';

const { parseXML, childAttr, required } = require('../parser');
const { createDoc, energyInteropNs } = require('../shared');
const { fragment } = require('xmlbuilder2');

async function parse(input) {
  const json = await parseXML(input);
  const o =
    json['oadrPayload']['$$']['oadrSignedObject'][0]['$$'][
      'oadrCancelPartyRegistration'
    ][0]['$$'];

  const result = {
    _type: 'oadrCancelPartyRegistration',
    requestId: required(childAttr(o, 'requestID'), 'requestID'),
    registrationId: required(childAttr(o, 'registrationID'), 'registrationID'),
  };

  const venId = childAttr(o, 'venID');
  if (venId != null) result.venId = venId;

  return result;
}

function serialize(obj) {
  const venId =
    obj.venId != null
      ? fragment()
        .ele(energyInteropNs, 'ei:venID')
        .txt(obj.venId)
      : fragment();

  const doc = createDoc()
    .ele('@oadr2b', 'oadr2b:oadrPayload')
    .ele('oadr2b:oadrSignedObject')
    .ele('oadr2b:oadrCancelPartyRegistration')
    .att(energyInteropNs, 'ei:schemaVersion', '2.0b')
    .ele('@pyld', 'pyld:requestID')
    .txt(obj.requestId)
    .up()
    .ele('@ei', 'ei:registrationID')
    .txt(obj.registrationId)
    .up()
    .import(venId)
    .doc();
  return doc.end({ headless: true, prettyPrint: false });
}

async function canParse(input) {
  const json = await parseXML(input);
  const o = json['oadrPayload']['$$']['oadrSignedObject'][0]['$$'];
  return o['oadrCancelPartyRegistration'] != null;
}

function canSerialize(message) {
  return message._type === 'oadrCancelPartyRegistration';
}

module.exports = {
  parse,
  serialize,
  canParse,
  canSerialize,
};