import 'display_category.dart';

/// 갤러리 UI 가 소비하는 통합 카탈로그 항목.
///
/// 3 source (ProtocolsTable / BreakProtocolsTable / DietPatternsTable) 를
/// 단일 sealed 계층으로 통합. 카드/필터링은 공통 필드만 보면 충분.
sealed class CatalogItem {
  String get id;
  String get title;
  String? get titleEn;

  /// 카드용 1줄 요약 (≤ 60자).
  String get summary;

  DisplayCategory get displayCategory;

  /// 'strong_rct' / 'meta_analysis' / 'observational' / 'mechanistic' / 'expert_opinion' / null.
  /// DietPattern 은 'strong'/'moderate'/'mixed'/'weak'.
  String? get evidenceStrength;

  List<String> get referenceIds;
}

/// Protocols 테이블 1:1 매핑.
final class ProtocolCatalogItem implements CatalogItem {
  ProtocolCatalogItem({
    required this.id,
    required this.title,
    required this.titleEn,
    required this.summary,
    required this.displayCategory,
    required this.evidenceStrength,
    required this.referenceIds,
    required this.what,
    required this.whenText,
    required this.dose,
    required this.why,
    required this.how,
    required this.checkText,
    required this.caution,
    required this.defaultAnchor,
    required this.minDoseForStart,
    required this.sourceDoc,
  });

  @override
  final String id;
  @override
  final String title;
  @override
  final String? titleEn;
  @override
  final String summary;
  @override
  final DisplayCategory displayCategory;
  @override
  final String? evidenceStrength;
  @override
  final List<String> referenceIds;

  final String what;
  final String whenText;
  final String dose;
  final String why;
  final List<String> how;
  final String checkText;
  final String? caution;
  final Map<String, dynamic>? defaultAnchor;
  final String? minDoseForStart;
  final String? sourceDoc;
}

/// BreakProtocols 테이블 1:1 매핑. displayCategory 는 항상 breakHabit.
final class BreakCatalogItem implements CatalogItem {
  BreakCatalogItem({
    required this.id,
    required this.title,
    required this.titleEn,
    required this.summary,
    required this.evidenceStrength,
    required this.referenceIds,
    required this.breakCategory,
    required this.hubermanSummary,
    required this.phases,
    required this.defaultCommonFrames,
    required this.tools,
    required this.medicalWarning,
  });

  @override
  final String id;
  @override
  final String title;
  @override
  final String? titleEn;
  @override
  final String summary;
  @override
  DisplayCategory get displayCategory => DisplayCategory.breakHabit;
  @override
  final String? evidenceStrength;
  @override
  final List<String> referenceIds;

  /// 원본 break 카테고리 (alcohol / nicotine / ...). 카드 sub-tag 로 활용.
  final String breakCategory;
  final String hubermanSummary;
  final List<String> phases;
  final List<String> defaultCommonFrames;
  final List<String> tools;
  final String? medicalWarning;
}

/// DietPatterns 테이블 1:1 매핑. displayCategory 는 항상 nutrition.
final class DietCatalogItem implements CatalogItem {
  DietCatalogItem({
    required this.id,
    required this.title,
    required this.titleEn,
    required this.summary,
    required this.evidenceStrength,
    required this.referenceIds,
    required this.name,
    required this.core,
    required this.strengths,
    required this.weaknesses,
    required this.koreanContextFit,
    required this.starterLevers,
    required this.medicalWarning,
    required this.linkedProtocolIds,
  });

  @override
  final String id;
  @override
  final String title;
  @override
  final String? titleEn;
  @override
  final String summary;
  @override
  DisplayCategory get displayCategory => DisplayCategory.nutrition;
  @override
  final String? evidenceStrength;
  @override
  final List<String> referenceIds;

  final String name;
  final String core;
  final List<String> strengths;
  final List<String> weaknesses;
  final String? koreanContextFit;
  final List<String> starterLevers;
  final String? medicalWarning;
  final List<String> linkedProtocolIds;
}

/// 그룹핑 헬퍼. 빈 카테고리 키는 결과 map 에 미포함.
Map<DisplayCategory, List<CatalogItem>> groupByCategory(
    List<CatalogItem> items) {
  final result = <DisplayCategory, List<CatalogItem>>{};
  for (final item in items) {
    result.putIfAbsent(item.displayCategory, () => []).add(item);
  }
  return result;
}