/// 格式化时间
String formatDate(dynamic date, [String format = 'YYYY-MM-DD hh:mm:ss']) {
  DateTime dateTime;

  if (date is String) {
    // 如果是字符串类型，尝试将其解析为 DateTime
    dateTime = DateTime.tryParse(date) ?? DateTime.now();
  } else if (date is DateTime) {
    // 如果是 DateTime 类型，直接使用
    dateTime = date;
  } else {
    // 如果不是合法的输入类型，默认使用当前时间
    dateTime = DateTime.now();
  }

  final yyyy = dateTime.year.toString();
  final MM = (dateTime.month).toString().padLeft(2, '0');
  final dd = (dateTime.day).toString().padLeft(2, '0');
  final HH = (dateTime.hour).toString().padLeft(2, '0');
  final mm = (dateTime.minute).toString().padLeft(2, '0');
  final ss = (dateTime.second).toString().padLeft(2, '0');

  String result = format
      .replaceFirst(RegExp('YYYY'), '$yyyy')
      .replaceFirst(RegExp('MM'), MM)
      .replaceFirst(RegExp('DD'), dd)
      .replaceFirst(RegExp('hh'), HH)
      .replaceFirst(RegExp('mm'), mm)
      .replaceFirst(RegExp('ss'), ss);

  return result;
}

/// 将秒数格式化为 00:00 或 00:00:00
/// - [seconds]: 秒数
String formatSeconds(int seconds) {
  final h = seconds ~/ 3600;
  final m = (seconds % 3600) ~/ 60;
  final s = seconds % 60;

  String twoDigits(int n) => n.toString().padLeft(2, '0');

  if (h > 0) {
    return '${twoDigits(h)}:${twoDigits(m)}:${twoDigits(s)}';
  } else {
    return '${twoDigits(m)}:${twoDigits(s)}';
  }
}


/// 将 "HH", "HH:mm" 或 "HH:mm:ss" 转为当天 DateTime
DateTime parseTime(String timeStr) {
  final now = DateTime.now();
  final parts = timeStr.split(':').map(int.parse).toList();

  final hour = parts.length > 0 ? parts[0] : 0;
  final minute = parts.length > 1 ? parts[1] : 0;
  final second = parts.length > 2 ? parts[2] : 0;

  return DateTime(now.year, now.month, now.day, hour, minute, second);
}