class Surat {
  final int id;
  final String noSurat;
  final String subject;
  final String? perihal;
  final int companyId;
  final int? vendorId;
  final int? categoryId;
  final DateTime? tanggal;
  final bool isApproved;
  final int? taskId;
  final String? body;
  final String? tembusan;
  final DateTime createdAt;

  const Surat({
    required this.id, required this.noSurat, required this.subject,
    this.perihal, required this.companyId, this.vendorId, this.categoryId,
    this.tanggal, required this.isApproved, this.taskId, this.body,
    this.tembusan, required this.createdAt,
  });

  factory Surat.fromJson(Map<String, dynamic> j) => Surat(
    id: j['id'],
    noSurat: j['no_surat'] ?? '',
    subject: j['subject'] ?? '',
    perihal: j['perihal'],
    companyId: j['company_id'] ?? 0,
    vendorId: j['vendor_id'],
    categoryId: j['category_id'],
    tanggal: j['tanggal'] != null ? DateTime.tryParse(j['tanggal']) : null,
    isApproved: j['is_approved'] ?? false,
    taskId: j['task_id'],
    body: j['body'],
    tembusan: j['tembusan'],
    createdAt: DateTime.parse(j['created_at']),
  );

  String get statusLabel => isApproved ? 'Disetujui' : 'Menunggu';
}

class PagedSurat {
  final List<Surat> items;
  final int total;
  final int page;
  final int limit;
  const PagedSurat({required this.items, required this.total, required this.page, required this.limit});
  factory PagedSurat.fromJson(Map<String, dynamic> j) => PagedSurat(
    items: (j['items'] as List).map((e) => Surat.fromJson(e)).toList(),
    total: j['total'], page: j['page'], limit: j['limit'],
  );
}