import $ from 'jquery';

var date = new Date();
var currentTimestamp = date.toISOString().replace(/^(.*)(\.\d+)(Z)/, '$1$3'); // 2023-01-01T12:34:56Z

// Microsecond offset appended to the current time string for formatting purposes
const MICROSECOND_OFFSET = '084216';

var currentTime =
  date.toISOString().replace(/(^.*T)(.*)(Z)/, '$2') + MICROSECOND_OFFSET; // 12:34:56.000084216
function currentDate(offset = 0, trimTime = false) {
  let outputDate = new Date(date);
  outputDate.setDate(outputDate.getDate() + offset);

  if (trimTime) {
    return outputDate.toISOString().replace(/T.*$/, ''); // 2023-01-01
  } else {
    return outputDate.toISOString().replace(/T.*$/, 'T00:00:00Z'); // 2023-01-01T00:00:00Z
  }
}

function enterpriseEOLDate() {
  const monthNames = [
    'January',
    'February',
    'March',
    'April',
    'May',
    'June',
    'July',
    'August',
    'September',
    'October',
    'November',
    'December',
  ];
  var inTwoYears = new Date(date);
  inTwoYears.setFullYear(inTwoYears.getFullYear() + 2);
  let earliestEOL = new Date(inTwoYears);
  return `${monthNames[earliestEOL.getMonth()]} ${earliestEOL.getDate()}, ${earliestEOL.getFullYear()}`;
}

function initialize() {
  $('span.current-timestamp').text(currentTimestamp);
  $('span.current-time').text(currentTime);
  $('span.enterprise-eol-date').text(enterpriseEOLDate());
  $('span.current-date').each(function () {
    var dayOffset = parseInt($(this).attr('offset'));
    var trimTime = $(this).attr('trim-time') === 'true';
    $(this).text(currentDate(dayOffset, trimTime));
  });
}

export { initialize };