import 'models.dart';
import 'fixtures.dart';

/// Repository abstraction for evaluations.
///
/// Phase 0 ships exactly one implementation: [MockRepository],
/// backed by [Fixtures]. The live implementation (gRPC against a
/// running `chain serve`) lands in Phase 0 week 1 — its API will
/// match this interface so no UI change is needed.
abstract class EvaluationRepository {
  Future<List<Evaluation>> list();
  Future<Evaluation?> byEli(String eli);
  String get mode;
  String get hubLabel;
}

/// In-memory, no-network implementation. Marks itself clearly so
/// the UI shows a "demo mode" badge.
class MockRepository implements EvaluationRepository {
  const MockRepository();

  /// Sorted copy of [Fixtures.evaluations], most-harmful first
  /// (Studie §6 SKM-€/Jahr as harm proxy). The sort is in
  /// repository.list() rather than the fixture declaration so
  /// future Hub-fed lists stay consistent without re-tuning the
  /// UI.
  @override
  Future<List<Evaluation>> list() async {
    final sorted = [...Fixtures.evaluations];
    sorted.sort((a, b) => b.skmEurPerYear.compareTo(a.skmEurPerYear));
    return sorted;
  }

  @override
  Future<Evaluation?> byEli(String eli) async {
    for (final e in Fixtures.evaluations) {
      if (e.norm.eli == eli) return e;
    }
    return null;
  }

  @override
  String get mode => 'demo';

  @override
  String get hubLabel => 'in-memory fixtures (kein Hub)';
}