import { DateTime, Interval } from 'luxon';

const rangeTest: [DateTime, DateTime] = [
  DateTime.fromISO('2022-01-01T00:00:00Z'),
  DateTime.fromISO('2022-05-01T00:00:00Z'),
];

function normalizeRange(range: [DateTime, DateTime]): [DateTime, DateTime] {
  return [
    range[0]?.isValid ? range[0] : DateTime.fromMillis(-864 * Math.pow(10, 12)),
    range[1]?.isValid ? range[1] : DateTime.fromMillis(864 * Math.pow(10, 12)),
  ];
}

function checkDate(
  range: [DateTime, DateTime],
  targetDate: DateTime,
  fallbackDate: DateTime
): DateTime {
  if (!fallbackDate) {
    return null;
  }

  const normalizedRange = normalizeRange(range);

  const contantainsTarget = Interval.fromDateTimes(
    normalizedRange[0],
    normalizedRange[1]
  ).contains(targetDate);

  return contantainsTarget ? targetDate : fallbackDate;
}

const boxOffice = {
  vFrom: null,
  vTo: null,
  //vTo: DateTime.fromISO('2022-05-01T00:00:00Z'),
};

const ticket = {
  vFrom: DateTime.fromISO('2022-05-01T00:00:00Z'),
};

const vRange: [DateTime, DateTime] = [boxOffice.vFrom, boxOffice.vTo];

const normalized = {
  vFrom: checkDate(vRange, ticket.vFrom, boxOffice.vFrom),
};

console.log(normalized);