import 'package:block_seasons/data/save_repository.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  Future<SaveRepository> freshRepo() async {
    SharedPreferences.setMockInitialValues({});
    return SaveRepository(await SharedPreferences.getInstance());
  }

  test('starts empty: no progress, zero stars, first stage unlocked', () async {
    final repo = await freshRepo();
    expect(repo.progressFor('season_001', 's1'), isNull);
    expect(repo.totalStars('season_001'), 0);
    expect(repo.highestUnlockedIndex('season_001', ['s1', 's2', 's3']), 0);
  });

  test('records results and keeps the best', () async {
    final repo = await freshRepo();
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's1', stars: 2, score: 500);
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's1', stars: 1, score: 900);
    final progress = repo.progressFor('season_001', 's1')!;
    expect(progress.stars, 2, reason: 'stars never downgrade');
    expect(progress.bestScore, 900, reason: 'best score upgrades');
  });

  test('unlock walks forward through starred stages', () async {
    final repo = await freshRepo();
    final ids = ['s1', 's2', 's3', 's4'];
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's1', stars: 1, score: 100);
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's2', stars: 3, score: 300);
    expect(repo.highestUnlockedIndex('season_001', ids), 2);
    // Completing the last stage caps the index at the end of the list.
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's3', stars: 1, score: 1);
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's4', stars: 1, score: 1);
    expect(repo.highestUnlockedIndex('season_001', ids), 3);
  });

  test('totals stars per season independently', () async {
    final repo = await freshRepo();
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's1', stars: 2, score: 1);
    await repo.recordResult(
        seasonId: 'season_001', stageId: 's2', stars: 3, score: 1);
    await repo.recordResult(
        seasonId: 'season_002', stageId: 's1', stars: 1, score: 1);
    expect(repo.totalStars('season_001'), 5);
    expect(repo.totalStars('season_002'), 1);
  });

  test('persists across repository instances', () async {
    SharedPreferences.setMockInitialValues({});
    final prefs = await SharedPreferences.getInstance();
    final first = SaveRepository(prefs);
    await first.recordResult(
        seasonId: 'season_001', stageId: 's1', stars: 3, score: 777);

    final second = SaveRepository(prefs);
    expect(second.progressFor('season_001', 's1')!.stars, 3);
    expect(second.progressFor('season_001', 's1')!.bestScore, 777);
  });
}