// 搜索状态 — SearchBloc 输出的 UI 状态

part of 'search_bloc.dart';

/// 搜索结果分类 tab
enum SearchResultTab {
  all('全部'),
  journal('日记'),
  template('模板'),
  tag('标签');

  const SearchResultTab(this.label);
  final String label;
}

/// 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 {
  /// 日记搜索结果列表
  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;

  /// 当前活跃的关键词
  final String? activeKeyword;

  /// 当前选中的结果分类 tab
  final SearchResultTab activeTab;

  /// 搜索历史（内存中保存，最多 10 条）
  final List<String> searchHistory;

  const SearchLoaded({
    this.results = const [],
    this.activeMood,
    this.activeTag,
    this.activeKeyword,
    this.activeTab = SearchResultTab.all,
    this.searchHistory = const [],
  });

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

  SearchLoaded copyWith({
    List<JournalEntry>? results,
    String? activeMood,
    bool clearActiveMood = false,
    String? activeTag,
    bool clearActiveTag = false,
    String? activeKeyword,
    bool clearActiveKeyword = false,
    SearchResultTab? activeTab,
    List<String>? searchHistory,
  }) =>
      SearchLoaded(
        results: results ?? this.results,
        activeMood: clearActiveMood ? null : (activeMood ?? this.activeMood),
        activeTag: clearActiveTag ? null : (activeTag ?? this.activeTag),
        activeKeyword:
            clearActiveKeyword ? null : (activeKeyword ?? this.activeKeyword),
        activeTab: activeTab ?? this.activeTab,
        searchHistory: searchHistory ?? this.searchHistory,
      );
}

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