import 'package:date_format/date_format.dart';

class DateTimeUtils {
  DateTimeUtils._();

  /// 年-月-日
  static String? yyyymmdd({
    DateTime? date,
    num? timestamp,
  }) {
    var dateTime = getDateTime(date: date, timestamp: timestamp);
    if (dateTime == null) return null;
    return formatDate(dateTime, [yyyy, '-', mm, '-', dd]);
  }

  /// 年-月-日 时:分:秒
  static String? yyyymmddHHnnss({
    DateTime? date,
    num? timestamp,
  }) {
    var dateTime = getDateTime(date: date, timestamp: timestamp);
    if (dateTime == null) return null;
    return formatDate(dateTime, [yyyy, '-', mm, '-', dd, ' ', HH, ':', nn, ':', ss]);
  }

  /// 年-月-日 时:分
  static String? yyyymmddHHnn({
    DateTime? date,
    num? timestamp,
  }) {
    var dateTime = getDateTime(date: date, timestamp: timestamp);
    if (dateTime == null) return null;
    return formatDate(dateTime, [yyyy, '-', mm, '-', dd, ' ', HH, ':', nn]);
  }

  /// 时:分:秒
  static String? HHnnss({
    DateTime? date,
    num? timestamp,
  }) {
    var dateTime = getDateTime(date: date, timestamp: timestamp);
    if (dateTime == null) return null;
    return formatDate(dateTime, [HH, ':', nn, ':', ss]);
  }

  static DateTime? getDateTime({
    DateTime? date,
    num? timestamp,
  }) {
    if (date != null) return date;
    if (timestamp != null) return DateTime.fromMillisecondsSinceEpoch(timestamp.toInt());
    return null;
  }
}