import 'package:p_tits_pas/models/user.dart';
import 'package:p_tits_pas/utils/enfant_status_utils.dart';

/// Enfant tel que renvoyé par `GET /enfants` (dashboard admin).
class EnfantAdminModel {
  final String id;
  final String? firstName;
  final String? lastName;
  final String? gender;
  final String? birthDate;
  final String? dueDate;
  final String status;
  final String? photoUrl;
  final bool consentPhoto;
  final bool isMultiple;
  final List<EnfantParentLink> parentLinks;

  EnfantAdminModel({
    required this.id,
    this.firstName,
    this.lastName,
    this.gender,
    this.birthDate,
    this.dueDate,
    required this.status,
    this.photoUrl,
    this.consentPhoto = false,
    this.isMultiple = false,
    this.parentLinks = const [],
  });

  String get fullName {
    final fn = (firstName ?? '').trim();
    final ln = (lastName ?? '').trim();
    if (fn.isEmpty && ln.isEmpty) return 'Enfant';
    if (ln.isEmpty) return fn;
    return '$fn $ln';
  }

  factory EnfantAdminModel.fromJson(Map<String, dynamic> json) {
    final linksRaw = json['parentLinks'] as List?;
    final links = <EnfantParentLink>[];
    if (linksRaw != null) {
      for (final item in linksRaw) {
        if (item is Map<String, dynamic>) {
          links.add(EnfantParentLink.fromJson(item));
        }
      }
    }

    return EnfantAdminModel(
      id: (json['id'] ?? '').toString(),
      firstName: json['first_name'] as String?,
      lastName: json['last_name'] as String?,
      gender: json['gender'] as String?,
      birthDate: _dateString(json['birth_date']),
      dueDate: _dateString(json['due_date']),
      status: normalizeEnfantStatus(json['status']?.toString()),
      photoUrl: json['photo_url'] as String?,
      consentPhoto: json['consent_photo'] == true,
      isMultiple: json['is_multiple'] == true,
      parentLinks: links,
    );
  }

  Map<String, dynamic> toUpdateJson() {
    return {
      if (firstName != null) 'first_name': firstName,
      if (lastName != null) 'last_name': lastName,
      if (gender != null && gender!.isNotEmpty) 'gender': gender,
      'status': status,
      if (birthDate != null && birthDate!.isNotEmpty) 'birth_date': birthDate,
      if (dueDate != null && dueDate!.isNotEmpty) 'due_date': dueDate,
      'consent_photo': consentPhoto,
      'is_multiple': isMultiple,
    };
  }

  static String? _dateString(dynamic v) {
    if (v == null) return null;
    if (v is String) return v.split('T').first;
    return v.toString().split('T').first;
  }
}

class EnfantParentLink {
  final String parentId;
  final String? parentName;

  EnfantParentLink({required this.parentId, this.parentName});

  factory EnfantParentLink.fromJson(Map<String, dynamic> json) {
    final parentId =
        (json['parentId'] ?? json['id_parent'] ?? '').toString();
    String? name;
    final parent = json['parent'];
    if (parent is Map<String, dynamic>) {
      final user = parent['user'];
      if (user is Map<String, dynamic>) {
        final u = AppUser.fromJson(user);
        name = u.fullName.isNotEmpty ? u.fullName : u.email;
      }
    }
    return EnfantParentLink(
      parentId: parentId,
      parentName: name,
    );
  }
}