/**
	Retrieves a list of supported time zones with their labels and values.
	This function fetches the available time zones from the environment,
	formats their offsets (e.g., "GMT+2"), and returns them in a sorted array.
*/

export const getTimeZones = (): { label: string; value: string }[] => {
  // Fetch supported timezones
  const timezones = Intl.supportedValuesOf('timeZone');

  return timezones
    .map((timezone) => {
      const formatter = new Intl.DateTimeFormat('en', {
        timeZone: timezone,
        timeZoneName: 'shortOffset',
      });
      const parts = formatter.formatToParts(new Date());
      const offset =
        parts.find((part) => part.type === 'timeZoneName')?.value || '';
      const formattedOffset = offset === 'GMT' ? 'GMT+0' : offset;

      return {
        value: timezone,
        label: `(${formattedOffset}) ${timezone.replace(/_/g, ' ')}`,
        numericOffset: parseInt(
          formattedOffset.replace('GMT', '').replace('+', '') || '0',
        ),
      };
    })
    .sort((a, b) => a.numericOffset - b.numericOffset); // Sort by numeric offset
};