// 搜索状态 — SearchBloc 输出的 UI 状态

part of 'search_bloc.dart';

/// 搜索状态基类
sealed class SearchState {
  const SearchState();
}

/// 初始状态 — 未执行任何搜索
final class SearchInitial extends SearchState {
  const SearchInitial();
}

/// 加载中 — 正在查询日记
final class SearchLoading extends SearchState {
  const SearchLoading();
}

/// 搜索结果已加载
final class SearchLoaded extends SearchState {
  /// 搜索结果列表（空列表表示无匹配）
  final List<JournalEntry> results;

  /// 当前活跃的心情筛选条件
  final String? activeMood;

  /// 当前活跃的标签筛选条件
  final String? activeTag;

  const SearchLoaded({
    this.results = const [],
    this.activeMood,
    this.activeTag,
  });

  /// 是否有活跃的筛选条件
  bool get hasActiveFilter => activeMood != null || activeTag != null;

  SearchLoaded copyWith({
    List<JournalEntry>? results,
    String? activeMood,
    String? activeTag,
  }) =>
      SearchLoaded(
        results: results ?? this.results,
        activeMood: activeMood ?? this.activeMood,
        activeTag: activeTag ?? this.activeTag,
      );
}

/// 搜索出错
final class SearchError extends SearchState {
  final String message;
  const SearchError(this.message);
}