class LeaveRequest {
  final int id;
  final int userId;
  final String username;
  final String startDate;
  final String endDate;
  final String reason;
  final String status; // pending | approved | rejected
  final String? adminNotes;
  final String? reviewedByUsername;
  final String? reviewedAt;
  final String createdAt;

  const LeaveRequest({
    required this.id,
    required this.userId,
    required this.username,
    required this.startDate,
    required this.endDate,
    required this.reason,
    required this.status,
    this.adminNotes,
    this.reviewedByUsername,
    this.reviewedAt,
    required this.createdAt,
  });

  factory LeaveRequest.fromJson(Map<String, dynamic> j) => LeaveRequest(
    id: j['id'],
    userId: j['user_id'],
    username: j['username'] ?? '',
    startDate: j['start_date'] ?? '',
    endDate: j['end_date'] ?? '',
    reason: j['reason'] ?? '',
    status: j['status'] ?? 'pending',
    adminNotes: j['admin_notes'],
    reviewedByUsername: j['reviewed_by_username'],
    reviewedAt: j['reviewed_at'],
    createdAt: j['created_at'] ?? '',
  );

  int get durationDays {
    try {
      final s = DateTime.parse(startDate);
      final e = DateTime.parse(endDate);
      return e.difference(s).inDays + 1;
    } catch (_) {
      return 1;
    }
  }
}