nj/app/lib/features/parent/bloc/parent_state.dart

// 家长中心状态 — ParentBloc 输出的 UI 状态

part of 'parent_bloc.dart';

/// 家长中心状态基类
sealed class ParentState {
  const ParentState();
}

/// 初始状态
final class ParentInitial extends ParentState {
  const ParentInitial();
}

/// 加载中
final class ParentLoading extends ParentState {
  const ParentLoading();
}

/// 孩子列表已加载
final class ParentChildrenLoaded extends ParentState {
  final List<ChildBinding> children;
  const ParentChildrenLoaded(this.children);
}

/// 孩子日记已加载（只读）
final class ParentJournalsLoaded extends ParentState {
  final String childId;
  final List<Map<String, dynamic>> journals;
  const ParentJournalsLoaded({
    required this.childId,
    required this.journals,
  });
}

/// 数据已导出
final class ParentDataExported extends ParentState {
  final String childId;
  final Map<String, dynamic> data;
  const ParentDataExported({
    required this.childId,
    required this.data,
  });
}

/// 数据已删除
final class ParentDataDeleted extends ParentState {
  final String childId;
  const ParentDataDeleted(this.childId);
}

/// 出错
final class ParentError extends ParentState {
  final String message;
  const ParentError(this.message);
}

// ===== 模型 =====

/// 家长-孩子绑定关系
class ChildBinding {
  final String bindingId;
  final String childId;
  final DateTime? verifiedAt;

  const ChildBinding({
    required this.bindingId,
    required this.childId,
    this.verifiedAt,
  });

  factory ChildBinding.fromJson(Map<String, dynamic> json) => ChildBinding(
        bindingId: json['binding_id'] as String,
        childId: json['child_id'] as String,
        verifiedAt: json['verified_at'] != null
            ? DateTime.tryParse(json['verified_at'] as String)
            : null,
      );
}