import 'package:intl/intl.dart';

// Source - https://stackoverflow.com/a/54775297
// Posted by diegoveloper, modified by community. See post 'Timeline' for change history
// Retrieved 2026-05-09, License - CC BY-SA 4.0

String _printDuration(Duration duration) {
  String negativeSign = duration.isNegative ? '-' : '';
  String twoDigits(int n) => n.toString().padLeft(2, "0");
  String twoDigitMinutes = twoDigits(duration.inMinutes.abs());
  String twoDigitSeconds = twoDigits(duration.inSeconds.remainder(60).abs());
  return "$negativeSign$twoDigitMinutes:$twoDigitSeconds";
}

String formatTimeWindow(String? starts, String? ends) {
  if (starts != null && ends != null) {
    DateTime startDt = DateTime.parse(starts);
    DateTime endDt = DateTime.parse(ends);

    Duration songLength = endDt.difference(startDt);

    return _printDuration(songLength);
  }

  return "--:--";
}

String formatStartingTime(String? startingTime) {
  if (startingTime != null) {
    DateTime dtStartTime = DateTime.parse(startingTime);
    return DateFormat('jm').format(dtStartTime);
  }
  return "--:--";
}