class CalendarEvent {
  final int id;
  final String title;
  final DateTime startDt;
  final DateTime? endDt;
  final bool allDay;
  final String description;
  final String location;
  final String color;
  final String? recurrence;
  final int? projectId;
  final int? reminderMinutes;

  const CalendarEvent({
    required this.id,
    required this.title,
    required this.startDt,
    this.endDt,
    required this.allDay,
    required this.description,
    required this.location,
    required this.color,
    this.recurrence,
    this.projectId,
    this.reminderMinutes,
  });

  factory CalendarEvent.fromJson(Map<String, dynamic> json) => CalendarEvent(
        id: json['id'] as int,
        title: json['title'] as String? ?? '',
        startDt: DateTime.parse(json['start_dt'] as String).toLocal(),
        endDt: json['end_dt'] != null
            ? DateTime.parse(json['end_dt'] as String).toLocal()
            : null,
        allDay: json['all_day'] as bool? ?? false,
        description: json['description'] as String? ?? '',
        location: json['location'] as String? ?? '',
        color: json['color'] as String? ?? '',
        recurrence: json['recurrence'] as String?,
        projectId: json['project_id'] as int?,
        reminderMinutes: json['reminder_minutes'] as int?,
      );
}

/// Strips time from a DateTime, returning midnight local.
/// Used as map keys in CalendarState.eventsByDay.
DateTime dateOnly(DateTime dt) => DateTime(dt.year, dt.month, dt.day);