import 'video_item.dart';

enum RadarSessionMode {
  normal,
  discovery,
  learn,
  relax,
  short,
  long,
}

extension RadarSessionModeLabel on RadarSessionMode {
  String get label {
    switch (this) {
      case RadarSessionMode.normal:
        return 'Comme d’habitude';
      case RadarSessionMode.discovery:
        return 'Je veux du nouveau';
      case RadarSessionMode.learn:
        return 'Apprendre';
      case RadarSessionMode.relax:
        return 'Détente';
      case RadarSessionMode.short:
        return 'Courtes vidéos';
      case RadarSessionMode.long:
        return 'Long format';
    }
  }

  String get shortLabel {
    switch (this) {
      case RadarSessionMode.normal:
        return 'Normal';
      case RadarSessionMode.discovery:
        return 'Découverte';
      case RadarSessionMode.learn:
        return 'Apprendre';
      case RadarSessionMode.relax:
        return 'Détente';
      case RadarSessionMode.short:
        return 'Court';
      case RadarSessionMode.long:
        return 'Long';
    }
  }
}

enum RadarLane {
  forYou,
  continueTopic,
  discovery,
}

class RadarRecommendation {
  const RadarRecommendation({
    required this.video,
    required this.score,
    required this.reasons,
    required this.breakdown,
    required this.lane,
    required this.matchedTerms,
    required this.isNewAuthor,
  });

  final VideoItem video;
  final int score;
  final List<String> reasons;
  final Map<String, int> breakdown;
  final RadarLane lane;
  final List<String> matchedTerms;
  final bool isNewAuthor;
}

class RadarFeed {
  const RadarFeed({
    required this.mode,
    required this.generatedAt,
    required this.profileTopics,
    required this.primary,
    required this.continueTopic,
    required this.discovery,
    this.categories = const <String, List<RadarRecommendation>>{},
  });

  final RadarSessionMode mode;
  final DateTime generatedAt;
  final List<String> profileTopics;
  final List<RadarRecommendation> primary;
  final List<RadarRecommendation> continueTopic;
  final List<RadarRecommendation> discovery;

  /// Primary local classification of proposed videos.
  ///
  /// A recommendation belongs to one main category so the category lanes
  /// stay clean and predictable.
  final Map<String, List<RadarRecommendation>> categories;

  bool get isEmpty =>
      primary.isEmpty &&
      continueTopic.isEmpty &&
      discovery.isEmpty;
}