import 'dart:convert';

import 'package:flutter_test/flutter_test.dart';
import 'package:gametime/application/application.dart';
import 'package:gametime/domain/domain.dart';

void main() {
  test('Exercise requires at least one active measure', () {
    expect(
      () => Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Push up',
        hasTimeMeasure: false,
        hasRepsMeasure: false,
        hasScoreMeasure: false,
      ),
      throwsA(isA<DomainException>()),
    );
  });

  test(
    'Exercise use case rejects active measures without default targets',
    () async {
      final useCase = _exerciseUseCase(_FakeExerciseRepository());

      await expectLater(
        useCase.create(
          name: 'Squat',
          hasTimeMeasure: true,
          hasRepsMeasure: false,
          hasScoreMeasure: false,
        ),
        throwsA(isA<DomainException>()),
      );
      await expectLater(
        useCase.create(
          name: 'Pompes',
          hasTimeMeasure: false,
          hasRepsMeasure: true,
          hasScoreMeasure: false,
        ),
        throwsA(isA<DomainException>()),
      );
      await expectLater(
        useCase.create(
          name: 'Charge',
          hasTimeMeasure: false,
          hasRepsMeasure: false,
          hasScoreMeasure: true,
          scoreLabel: 'Charge',
          scoreUnit: 'kg',
        ),
        throwsA(isA<DomainException>()),
      );
    },
  );

  test('Exercise use case rejects invalid default targets', () async {
    final useCase = _exerciseUseCase(_FakeExerciseRepository());

    await expectLater(
      useCase.create(
        name: 'Squat',
        hasTimeMeasure: true,
        hasRepsMeasure: false,
        hasScoreMeasure: false,
        defaultTargetTimeSeconds: 0,
      ),
      throwsA(isA<DomainException>()),
    );
    await expectLater(
      useCase.create(
        name: 'Pompes',
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: -1,
      ),
      throwsA(isA<DomainException>()),
    );
    await expectLater(
      useCase.create(
        name: 'Charge',
        hasTimeMeasure: false,
        hasRepsMeasure: false,
        hasScoreMeasure: true,
        scoreLabel: 'Charge',
        scoreUnit: 'kg',
        defaultTargetScore: -1,
      ),
      throwsA(isA<DomainException>()),
    );
  });

  test(
    'Exercise use case accepts a zero manual score default target',
    () async {
      final repository = _FakeExerciseRepository();
      final useCase = _exerciseUseCase(repository);

      final exercise = await useCase.create(
        name: 'Charge',
        hasTimeMeasure: false,
        hasRepsMeasure: false,
        hasScoreMeasure: true,
        scoreLabel: 'Charge',
        scoreUnit: 'kg',
        defaultTargetScore: 0,
      );

      expect(exercise.defaultTargetScore, 0);
      expect(repository.saved.single.defaultTargetScore, 0);
    },
  );

  test(
    'Exercise use case accepts stopwatch score without default target',
    () async {
      final repository = _FakeExerciseRepository();
      final useCase = _exerciseUseCase(repository);

      final exercise = await useCase.create(
        name: 'Sprint',
        hasTimeMeasure: false,
        hasRepsMeasure: false,
        hasScoreMeasure: true,
        scoreInputMode: ScoreInputMode.stopwatch,
        scoreLabel: 'Temps réalisé',
      );

      expect(exercise.defaultTargetScoreTimeMs, isNull);
      expect(repository.saved.single.metadata.id, exercise.metadata.id);
    },
  );

  test(
    'Exercise use case rejects non-positive stopwatch score default target',
    () async {
      final useCase = _exerciseUseCase(_FakeExerciseRepository());

      await expectLater(
        useCase.create(
          name: 'Sprint',
          hasTimeMeasure: false,
          hasRepsMeasure: false,
          hasScoreMeasure: true,
          scoreInputMode: ScoreInputMode.stopwatch,
          scoreLabel: 'Temps réalisé',
          defaultTargetScoreTimeMs: 0,
        ),
        throwsA(isA<DomainException>()),
      );
    },
  );

  test('Exercise update validates default targets too', () async {
    final repository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final useCase = _exerciseUseCase(repository);

    await expectLater(
      useCase.update(
        id: 'exercise-1',
        name: 'Squat',
        hasTimeMeasure: true,
        hasRepsMeasure: false,
        hasScoreMeasure: false,
      ),
      throwsA(isA<DomainException>()),
    );
  });

  test('Exercise use case rejects more than eight steps', () async {
    final useCase = _exerciseUseCase(_FakeExerciseRepository());

    await expectLater(
      useCase.create(
        name: 'Complexe',
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 1,
        steps: [
          for (var index = 0; index < 9; index++)
            _step(id: 'step-$index', position: index),
        ],
      ),
      throwsA(isA<DomainException>()),
    );
  });

  test('Exercise use case rejects non-contiguous step positions', () async {
    final useCase = _exerciseUseCase(_FakeExerciseRepository());

    await expectLater(
      useCase.create(
        name: 'Complexe',
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 1,
        steps: [
          _step(id: 'step-1', position: 1),
          _step(id: 'step-0', position: 0),
        ],
      ),
      throwsA(isA<DomainException>()),
    );
  });

  test('Exercise step validation rejects invalid basic fields', () {
    expect(() => _step(name: ''), throwsA(isA<DomainException>()));
    expect(() => _step(defaultTargetValue: 0), throwsA(isA<DomainException>()));
  });

  test('Exercise step validation rejects disabled score values', () {
    expect(
      () => _step(hasScore: false, scoreLabel: 'Charge'),
      throwsA(isA<DomainException>()),
    );
    expect(
      () => _step(hasScore: false, defaultTargetScore: 0),
      throwsA(isA<DomainException>()),
    );
  });

  test(
    'Exercise step manual score validation accepts zero and rejects negative',
    () {
      final step = _step(
        hasScore: true,
        scoreLabel: 'Charge',
        scoreUnit: 'kg',
        defaultTargetScore: 0,
      );

      expect(step.defaultTargetScore, 0);
      expect(
        () => _step(
          hasScore: true,
          scoreLabel: 'Charge',
          scoreUnit: 'kg',
          defaultTargetScore: -1,
        ),
        throwsA(isA<DomainException>()),
      );
      expect(
        () => _step(hasScore: true, scoreLabel: 'Charge'),
        throwsA(isA<DomainException>()),
      );
    },
  );

  test('Exercise step stopwatch score validation rejects manual fields', () {
    final step = _step(
      hasScore: true,
      scoreInputMode: ScoreInputMode.stopwatch,
      defaultTargetScoreTimeMs: 12000,
    );

    expect(step.defaultTargetScoreTimeMs, 12000);
    expect(
      () => _step(
        hasScore: true,
        scoreInputMode: ScoreInputMode.stopwatch,
        defaultTargetScoreTimeMs: 0,
      ),
      throwsA(isA<DomainException>()),
    );
    expect(
      () => _step(
        hasScore: true,
        scoreInputMode: ScoreInputMode.stopwatch,
        scoreLabel: 'Charge',
      ),
      throwsA(isA<DomainException>()),
    );
  });

  test('Exercise image gallery rejects a sixth image', () async {
    final repository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        imageMediaIds: const [
          'media-1',
          'media-2',
          'media-3',
          'media-4',
          'media-5',
        ],
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final useCase = _exerciseUseCase(repository);

    await expectLater(
      useCase.addImage(exerciseId: 'exercise-1', mediaAssetId: 'media-6'),
      throwsA(isA<DomainException>()),
    );
  });

  test('Exercise image gallery reorders images', () async {
    final repository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        imageMediaIds: const ['media-1', 'media-2', 'media-3'],
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final useCase = _exerciseUseCase(repository);

    final updated = await useCase.reorderImages(
      exerciseId: 'exercise-1',
      orderedMediaIds: const ['media-3', 'media-1', 'media-2'],
    );

    expect(updated.imageMediaIds, ['media-3', 'media-1', 'media-2']);
    expect(repository.saved.single.imageMediaIds, updated.imageMediaIds);
  });

  test('Exercise image gallery removes an image', () async {
    final repository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        imageMediaIds: const ['media-1', 'media-2', 'media-3'],
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final useCase = _exerciseUseCase(repository);

    final updated = await useCase.removeImage(
      exerciseId: 'exercise-1',
      mediaAssetId: 'media-2',
    );

    expect(updated.imageMediaIds, ['media-1', 'media-3']);
    expect(updated.imageMediaId, 'media-1');
  });

  test('Exercise icon can be set to an image from the gallery', () async {
    final repository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        imageMediaIds: const ['media-1', 'media-2'],
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final useCase = _exerciseUseCase(repository);

    final updated = await useCase.setIcon(
      exerciseId: 'exercise-1',
      mediaAssetId: 'media-2',
    );

    expect(updated.iconMediaId, 'media-2');
    expect(repository.saved.single.iconMediaId, 'media-2');
  });

  test('Exercise icon rejects images outside the gallery', () async {
    final repository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        imageMediaIds: const ['media-1'],
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final useCase = _exerciseUseCase(repository);

    await expectLater(
      useCase.setIcon(exerciseId: 'exercise-1', mediaAssetId: 'media-2'),
      throwsA(isA<DomainException>()),
    );
    expect(repository.saved, isEmpty);
  });

  test('Exercise icon is reset when its image is removed', () async {
    final repository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        imageMediaIds: const ['media-1', 'media-2'],
        iconMediaId: 'media-2',
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final useCase = _exerciseUseCase(repository);

    final updated = await useCase.removeImage(
      exerciseId: 'exercise-1',
      mediaAssetId: 'media-2',
    );

    expect(updated.imageMediaIds, ['media-1']);
    expect(updated.iconMediaId, isNull);
    expect(repository.saved.single.iconMediaId, isNull);
  });

  test('program exercise snapshot keeps the full image gallery', () async {
    final exerciseRepository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        imageMediaIds: const ['media-1', 'media-2', 'media-3'],
        videoMediaId: 'video-1',
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final programRepository = _FakeProgramRepository()
      ..programs.add(
        Program(
          metadata: _metadata('program-1'),
          name: 'Jambes',
          defaultRestSeconds: 60,
        ),
      );
    final useCase = ProgramUseCases(
      programRepository: programRepository,
      exerciseRepository: exerciseRepository,
      templateRepository: _FakeWorkoutTemplateRepository(),
      clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
      ids: _FakeIds(),
      originDeviceId: 'device-1',
    );

    final snapshot = await useCase.addExercise(
      programId: 'program-1',
      exerciseId: 'exercise-1',
      position: 0,
      setsCount: 3,
      enabledMeasures: const {WorkoutMeasure.reps},
    );

    expect(snapshot.exerciseImageMediaIdSnapshot, 'media-1');
    expect(snapshot.exerciseImageMediaIdsSnapshot, [
      'media-1',
      'media-2',
      'media-3',
    ]);
    expect(snapshot.exerciseVideoMediaIdSnapshot, 'video-1');
    expect(snapshot.toSnapshotJson()['imageMediaIdsSnapshot'], [
      'media-1',
      'media-2',
      'media-3',
    ]);
    expect(
      programRepository
          .programs
          .single
          .exercises
          .single
          .exerciseImageMediaIdsSnapshot,
      snapshot.exerciseImageMediaIdsSnapshot,
    );
  });

  test('delete exercise keeps existing program snapshots unchanged', () async {
    final exerciseRepository = _FakeExerciseRepository()
      ..exercise = Exercise(
        metadata: _metadata('exercise-1'),
        name: 'Squat',
        hasTimeMeasure: false,
        hasRepsMeasure: true,
        hasScoreMeasure: false,
        defaultTargetReps: 10,
      );
    final programRepository = _FakeProgramRepository()
      ..programs.add(
        Program(
          metadata: _metadata('program-1'),
          name: 'Jambes',
          defaultRestSeconds: 60,
          exercises: [
            _programExercise(
              id: 'program-exercise-1',
              programId: 'program-1',
              sourceExerciseId: 'exercise-1',
              position: 0,
            ),
          ],
        ),
      );
    final useCase = _exerciseUseCase(
      exerciseRepository,
      programRepository: programRepository,
    );

    final deleted = await useCase.delete('exercise-1');

    expect(deleted.metadata.deletedAt, isNotNull);
    expect(exerciseRepository.listActive(), completion(isEmpty));
    expect(programRepository.programs.single.exercises, hasLength(1));
    expect(
      programRepository.programs.single.exercises.single.sourceExerciseId,
      'exercise-1',
    );
    expect(
      programRepository.programs.single.exercises.single.exerciseNameSnapshot,
      'Exercise program-exercise-1',
    );
    expect(programRepository.programs.single.exercises.single.position, 0);
  });

  test(
    'delete program removes it from referencing workout templates',
    () async {
      final programRepository = _FakeProgramRepository()
        ..programs.add(
          Program(
            metadata: _metadata('program-1'),
            name: 'Jambes',
            defaultRestSeconds: 60,
          ),
        );
      final templateRepository = _FakeWorkoutTemplateRepository()
        ..templates.add(
          WorkoutTemplate(
            metadata: _metadata('template-1'),
            name: 'Séance',
            programs: [
              _templateProgram(
                id: 'template-program-1',
                workoutTemplateId: 'template-1',
                sourceProgramId: 'program-1',
                position: 0,
              ),
              _templateProgram(
                id: 'template-program-2',
                workoutTemplateId: 'template-1',
                sourceProgramId: 'program-2',
                position: 1,
              ),
            ],
            overrides: [
              WorkoutTemplateExerciseOverride(
                metadata: _metadata('override-1'),
                workoutTemplateProgramId: 'template-program-1',
                snapshotProgramExerciseId: 'exercise-snapshot-1',
                targetRepsOverride: 8,
              ),
            ],
          ),
        );
      final useCase = ProgramUseCases(
        programRepository: programRepository,
        exerciseRepository: _FakeExerciseRepository(),
        templateRepository: templateRepository,
        clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
        ids: _FakeIds(),
        originDeviceId: 'device-1',
      );

      final deleted = await useCase.delete('program-1');

      expect(deleted.metadata.deletedAt, isNotNull);
      expect(programRepository.listActive(), completion(isEmpty));
      final template = templateRepository.templates.single;
      expect(template.programs, hasLength(1));
      expect(template.programs.single.sourceProgramId, 'program-2');
      expect(template.programs.single.position, 0);
      expect(template.overrides, isEmpty);
    },
  );

  test('delete workout template hides it from active list', () async {
    final templateRepository = _FakeWorkoutTemplateRepository()
      ..templates.add(
        WorkoutTemplate(metadata: _metadata('template-1'), name: 'Séance'),
      );
    final useCase = WorkoutTemplateUseCases(
      templateRepository: templateRepository,
      programRepository: _FakeProgramRepository(),
      clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
      ids: _FakeIds(),
      originDeviceId: 'device-1',
    );

    final deleted = await useCase.delete('template-1');

    expect(deleted.metadata.deletedAt, isNotNull);
    expect(templateRepository.listActive(), completion(isEmpty));
  });

  test('history stays unchanged after deleting its source template', () async {
    final templateRepository = _FakeWorkoutTemplateRepository()
      ..templates.add(
        WorkoutTemplate(metadata: _metadata('template-1'), name: 'Séance'),
      );
    final history = WorkoutHistory(
      metadata: _metadata('history-1'),
      sourceWorkoutTemplateId: 'template-1',
      nameSnapshot: 'Séance historique',
      startedAt: DateTime.utc(2026, 7, 17, 10),
      endedAt: DateTime.utc(2026, 7, 17, 11),
      totalActiveMs: 3600000,
      completed: true,
      historySnapshotJson: '{"name":"Séance historique"}',
    );
    final useCase = WorkoutTemplateUseCases(
      templateRepository: templateRepository,
      programRepository: _FakeProgramRepository(),
      clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
      ids: _FakeIds(),
      originDeviceId: 'device-1',
    );

    await useCase.delete('template-1');

    expect(history.sourceWorkoutTemplateId, 'template-1');
    expect(history.nameSnapshot, 'Séance historique');
    expect(history.historySnapshotJson, '{"name":"Séance historique"}');
  });

  test('Workout template use case rejects active measure overrides', () async {
    final useCase = WorkoutTemplateUseCases(
      templateRepository: _FakeWorkoutTemplateRepository(),
      programRepository: _FakeProgramRepository(),
      clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
      ids: _FakeIds(),
      originDeviceId: 'device-1',
    );

    await expectLater(
      useCase.overrideExerciseTargets(
        workoutTemplateProgramId: 'template-program-1',
        snapshotProgramExerciseId: 'exercise-snapshot-1',
        attemptedMeasureOverride: {WorkoutMeasure.reps},
      ),
      throwsA(isA<DomainException>()),
    );
  });

  test(
    'Workout template use case rejects target overrides for inactive measures',
    () async {
      final useCase = WorkoutTemplateUseCases(
        templateRepository: _FakeWorkoutTemplateRepository(),
        programRepository: _FakeProgramRepository(),
        clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
        ids: _FakeIds(),
        originDeviceId: 'device-1',
      );

      await expectLater(
        useCase.saveConfigured(
          name: 'Séance tir',
          programs: [
            WorkoutTemplateProgramConfig(
              clientKey: 'program-1',
              programNameSnapshot: 'Programme tir',
              defaultRestSecondsSnapshot: 30,
              programSnapshotJson: jsonEncode({
                'exercises': [
                  {
                    'id': 'exercise-snapshot-1',
                    'exerciseNameSnapshot': 'Lancers francs',
                    'setsCount': 3,
                    'timeEnabled': true,
                    'repsEnabled': false,
                    'scoreEnabled': false,
                    'targetTimeSeconds': 60,
                    'targetReps': null,
                    'targetScore': null,
                  },
                ],
              }),
            ),
          ],
          overrides: const [
            WorkoutTemplateExerciseOverrideConfig(
              workoutTemplateProgramClientKey: 'program-1',
              snapshotProgramExerciseId: 'exercise-snapshot-1',
              targetRepsOverride: 10,
            ),
          ],
        ),
        throwsA(isA<DomainException>()),
      );
    },
  );

  test('Active session elapsed time is based on persisted timestamps', () {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final session = ActiveWorkoutSession(
      metadata: _metadata('session-1'),
      status: ActiveWorkoutStatus.running,
      startedAt: clock.now(),
      lastPersistedAt: clock.now(),
      elapsedActiveMs: 0,
      currentProgramIndex: 0,
      currentExerciseIndex: 0,
      currentSetIndex: 0,
      resolvedTemplateSnapshotJson: '{}',
    );

    clock.value = clock.value.add(const Duration(seconds: 30));
    final paused = session.pause(clock.now());
    expect(paused.elapsedActiveMs, 30000);

    clock.value = clock.value.add(const Duration(minutes: 5));
    final resumed = paused.resume(clock.now());
    expect(resumed.elapsedActiveMillisecondsAt(clock.now()), 30000);

    clock.value = clock.value.add(const Duration(seconds: 15));
    expect(resumed.elapsedActiveMillisecondsAt(clock.now()), 45000);
  });

  test('adjustRestSeconds persists adjusted rest duration', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final repository = _FakeActiveSessionRepository()
      ..restStates['rest-1'] = ActiveRestState(
        metadata: _metadata('rest-1'),
        activeWorkoutSessionId: 'session-1',
        afterProgramIndex: 0,
        afterExerciseIndex: 0,
        afterSetIndex: 0,
        plannedRestSeconds: 60,
        adjustedRestSeconds: 60,
        startedAt: clock.now(),
      );
    final useCase = _activeUseCase(repository, clock);

    final adjusted = await useCase.adjustRestSeconds(
      restStateId: 'rest-1',
      deltaSeconds: -75,
    );

    expect(adjusted.adjustedRestSeconds, 0);
    expect(repository.restStates['rest-1']!.adjustedRestSeconds, 0);
  });

  test('skipRest persists skippedAt timestamp', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final repository = _FakeActiveSessionRepository()
      ..restStates['rest-1'] = ActiveRestState(
        metadata: _metadata('rest-1'),
        activeWorkoutSessionId: 'session-1',
        afterProgramIndex: 0,
        afterExerciseIndex: 0,
        afterSetIndex: 0,
        plannedRestSeconds: 60,
        adjustedRestSeconds: 60,
        startedAt: clock.now(),
      );
    clock.value = clock.value.add(const Duration(seconds: 10));
    final useCase = _activeUseCase(repository, clock);

    final skipped = await useCase.skipRest(restStateId: 'rest-1');

    expect(skipped.skippedAt, clock.now());
    expect(repository.restStates['rest-1']!.skippedAt, clock.now());
  });

  test('findActiveRest returns latest non-ended non-skipped rest', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final repository = _FakeActiveSessionRepository()
      ..restStates['ended'] = ActiveRestState(
        metadata: _metadata('ended'),
        activeWorkoutSessionId: 'session-1',
        afterProgramIndex: 0,
        afterExerciseIndex: 0,
        afterSetIndex: 0,
        plannedRestSeconds: 60,
        adjustedRestSeconds: 60,
        startedAt: clock.now(),
        endedAt: clock.now().add(const Duration(seconds: 60)),
      )
      ..restStates['older-active'] = ActiveRestState(
        metadata: _metadata('older-active'),
        activeWorkoutSessionId: 'session-1',
        afterProgramIndex: 0,
        afterExerciseIndex: 1,
        afterSetIndex: 0,
        plannedRestSeconds: 60,
        adjustedRestSeconds: 60,
        startedAt: clock.now().add(const Duration(seconds: 30)),
      )
      ..restStates['latest-active'] = ActiveRestState(
        metadata: _metadata('latest-active'),
        activeWorkoutSessionId: 'session-1',
        afterProgramIndex: 0,
        afterExerciseIndex: 2,
        afterSetIndex: 0,
        plannedRestSeconds: 60,
        adjustedRestSeconds: 60,
        startedAt: clock.now().add(const Duration(seconds: 90)),
      )
      ..restStates['skipped'] = ActiveRestState(
        metadata: _metadata('skipped'),
        activeWorkoutSessionId: 'session-1',
        afterProgramIndex: 0,
        afterExerciseIndex: 3,
        afterSetIndex: 0,
        plannedRestSeconds: 60,
        adjustedRestSeconds: 60,
        startedAt: clock.now().add(const Duration(seconds: 120)),
        skippedAt: clock.now().add(const Duration(seconds: 125)),
      );
    final useCase = _activeUseCase(repository, clock);

    final active = await useCase.findActiveRest(sessionId: 'session-1');

    expect(active?.metadata.id, 'latest-active');
  });

  test('upsertSetResultAtPosition does not move session cursor', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final session = _sessionWithSnapshot(
      currentProgramIndex: 0,
      currentExerciseIndex: 0,
      currentSetIndex: 1,
    );
    final repository = _FakeActiveSessionRepository()..session = session;
    final useCase = _activeUseCase(repository, clock);

    await useCase.upsertSetResultAtPosition(
      sessionId: session.metadata.id,
      programIndex: 0,
      exerciseIndex: 0,
      setIndex: 0,
      status: SetResultStatus.completed,
      actualReps: 12,
    );

    expect(repository.session?.currentProgramIndex, 0);
    expect(repository.session?.currentExerciseIndex, 0);
    expect(repository.session?.currentSetIndex, 1);
    expect(repository.results.single.actualReps, 12);
  });

  test(
    'upsertSetResultAtPosition preserves existing id and createdAt',
    () async {
      final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
      final session = _sessionWithSnapshot(
        currentProgramIndex: 0,
        currentExerciseIndex: 0,
        currentSetIndex: 1,
      );
      final existingCreatedAt = DateTime.utc(2026, 7, 17, 10);
      final existing = ActiveSetResult(
        metadata: EntityMetadata(
          id: 'result-1',
          createdAt: existingCreatedAt,
          updatedAt: existingCreatedAt,
          originDeviceId: 'device-1',
        ),
        activeWorkoutSessionId: session.metadata.id,
        programSnapshotId: 'program-snapshot-1',
        exerciseSnapshotId: 'exercise-snapshot-1',
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
        actualReps: 8,
      );
      final repository = _FakeActiveSessionRepository()
        ..session = session
        ..results.add(existing);
      final useCase = _activeUseCase(repository, clock);

      final updated = await useCase.upsertSetResultAtPosition(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
        status: SetResultStatus.completed,
        actualReps: 12,
      );

      expect(updated.metadata.id, 'result-1');
      expect(updated.metadata.createdAt, existingCreatedAt);
      expect(updated.actualReps, 12);
    },
  );

  test(
    'listSetResults returns pending, skipped and completed statuses',
    () async {
      final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
      final session = _sessionWithSnapshot(
        currentProgramIndex: 0,
        currentExerciseIndex: 0,
        currentSetIndex: 2,
        setsCount: 3,
      );
      final repository = _FakeActiveSessionRepository()
        ..session = session
        ..results.addAll([
          ActiveSetResult(
            metadata: _metadata('completed'),
            activeWorkoutSessionId: session.metadata.id,
            programSnapshotId: 'program-snapshot-1',
            exerciseSnapshotId: 'exercise-snapshot-1',
            programIndex: 0,
            exerciseIndex: 0,
            setIndex: 0,
            actualReps: 10,
            status: SetResultStatus.completed,
          ),
          ActiveSetResult(
            metadata: _metadata('skipped'),
            activeWorkoutSessionId: session.metadata.id,
            programSnapshotId: 'program-snapshot-1',
            exerciseSnapshotId: 'exercise-snapshot-1',
            programIndex: 0,
            exerciseIndex: 0,
            setIndex: 1,
            status: SetResultStatus.skipped,
          ),
        ]);
      final useCase = _activeUseCase(repository, clock);

      final states = await useCase.listSetResults(session.metadata.id);

      expect(states.map((state) => state.status), [
        SetPositionStatus.completed,
        SetPositionStatus.skipped,
        SetPositionStatus.pending,
      ]);
    },
  );

  test(
    'score stopwatch start stop resume accumulates elapsed duration',
    () async {
      final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
      final session = _sessionWithSnapshot(
        currentProgramIndex: 0,
        currentExerciseIndex: 0,
        currentSetIndex: 0,
      );
      final repository = _FakeActiveSessionRepository()..session = session;
      final useCase = _activeUseCase(repository, clock);

      await useCase.startScoreStopwatch(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
      );
      clock.value = clock.value.add(const Duration(seconds: 5));
      final stopped = await useCase.stopScoreStopwatch(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
      );
      clock.value = clock.value.add(const Duration(seconds: 10));
      await useCase.resumeScoreStopwatch(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
      );
      clock.value = clock.value.add(const Duration(seconds: 3));
      final stoppedAgain = await useCase.stopScoreStopwatch(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
      );

      expect(stopped.accumulatedMs, 5000);
      expect(stoppedAgain.accumulatedMs, 8000);
    },
  );

  test('score stopwatch state survives use case reconstruction', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final session = _sessionWithSnapshot(
      currentProgramIndex: 0,
      currentExerciseIndex: 0,
      currentSetIndex: 0,
    );
    final repository = _FakeActiveSessionRepository()..session = session;

    await _activeUseCase(repository, clock).startScoreStopwatch(
      sessionId: session.metadata.id,
      programIndex: 0,
      exerciseIndex: 0,
      setIndex: 0,
    );
    clock.value = clock.value.add(const Duration(seconds: 4));

    final reconstructed = _activeUseCase(repository, clock);
    final stopped = await reconstructed.stopScoreStopwatch(
      sessionId: session.metadata.id,
      programIndex: 0,
      exerciseIndex: 0,
      setIndex: 0,
    );

    expect(stopped.accumulatedMs, 4000);
  });

  test(
    'exercise step progress auto-advances consecutive elapsed timers after kill',
    () async {
      final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
      final session = _sessionWithSnapshot(
        currentProgramIndex: 0,
        currentExerciseIndex: 0,
        currentSetIndex: 0,
        setsCount: 1,
        targetReps: 2,
        exerciseSteps: [
          _step(
            id: 'step-1',
            position: 0,
            name: 'Gauche',
            type: ExerciseStepType.time,
            defaultTargetValue: 1,
          ),
          _step(
            id: 'step-2',
            position: 1,
            name: 'Droite',
            type: ExerciseStepType.time,
            defaultTargetValue: 1,
          ),
        ],
      );
      final repository = _FakeActiveSessionRepository()..session = session;
      final useCase = ActiveExerciseStepUseCases(
        sessionRepository: repository,
        clock: clock,
        ids: _FakeIds(),
        originDeviceId: 'device-1',
      );

      await useCase.startOrResumeProgress(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
      );
      await useCase.startTimer(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
      );

      clock.value = clock.value.add(const Duration(milliseconds: 4500));
      final reconstructed = ActiveExerciseStepUseCases(
        sessionRepository: repository,
        clock: clock,
        ids: _FakeIds(),
        originDeviceId: 'device-1',
      );

      final view = await reconstructed.startOrResumeProgress(
        sessionId: session.metadata.id,
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
      );

      expect(
        view.state.status,
        ActiveExerciseStepProgressStatus.sequenceComplete,
      );
      expect(repository.stepResults, hasLength(4));
      expect(repository.stepResults.map((result) => result.passageIndex), [
        0,
        0,
        1,
        1,
      ]);
      expect(repository.stepResults.map((result) => result.stepIndex), [
        0,
        1,
        0,
        1,
      ]);
      expect(repository.stepResults.map((result) => result.actualTimeMs), [
        1000,
        1000,
        1000,
        1000,
      ]);
    },
  );

  test('AuthUseCases register stores token and account session', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final tokenStore = _FakeAuthTokenStore();
    final accountRepository = _FakeOnlineAccountRepository();
    final remoteAuthApi = _FakeRemoteAuthApi();
    final useCase = _authUseCase(
      tokenStore: tokenStore,
      accountRepository: accountRepository,
      remoteAuthApi: remoteAuthApi,
      clock: clock,
    );

    final session = await useCase.register(
      email: 'USER@example.com',
      password: 'password123',
      displayName: 'User',
    );

    expect(session.serverUserId, 'server-user-1');
    expect(session.email, 'user@example.com');
    expect(session.displayName, 'User');
    expect(session.isLoggedIn, isTrue);
    expect(tokenStore.token, 'token-1');
    expect(accountRepository.session, session);
  });

  test('AuthUseCases register propagates email already used error', () async {
    final remoteAuthApi = _FakeRemoteAuthApi()
      ..registerException = const RemoteAuthException(
        RemoteAuthFailure.emailAlreadyUsed,
      );

    await expectLater(
      _authUseCase(
        remoteAuthApi: remoteAuthApi,
      ).register(email: 'user@example.com', password: 'password123'),
      throwsA(
        isA<RemoteAuthException>().having(
          (error) => error.failure,
          'failure',
          RemoteAuthFailure.emailAlreadyUsed,
        ),
      ),
    );
  });

  test('AuthUseCases login stores token and account session', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final tokenStore = _FakeAuthTokenStore();
    final accountRepository = _FakeOnlineAccountRepository();
    final remoteAuthApi = _FakeRemoteAuthApi();
    final useCase = _authUseCase(
      tokenStore: tokenStore,
      accountRepository: accountRepository,
      remoteAuthApi: remoteAuthApi,
      clock: clock,
    );

    final session = await useCase.login(
      email: 'user@example.com',
      password: 'password123',
    );

    expect(session.serverUserId, 'server-user-1');
    expect(session.isLoggedIn, isTrue);
    expect(tokenStore.token, 'token-1');
    expect(tokenStore.expiresAt, DateTime.utc(2026, 8, 16, 12));
    expect(accountRepository.session?.lastAuthenticatedAt, clock.now());
  });

  test('AuthUseCases login propagates invalid credentials', () async {
    final remoteAuthApi = _FakeRemoteAuthApi()
      ..loginException = const RemoteAuthException(
        RemoteAuthFailure.invalidCredentials,
      );

    await expectLater(
      _authUseCase(
        remoteAuthApi: remoteAuthApi,
      ).login(email: 'user@example.com', password: 'wrong-password'),
      throwsA(
        isA<RemoteAuthException>().having(
          (error) => error.failure,
          'failure',
          RemoteAuthFailure.invalidCredentials,
        ),
      ),
    );
  });

  test('AuthUseCases logout clears local token even if remote fails', () async {
    final clock = _FakeClock(DateTime.utc(2026, 7, 17, 12));
    final tokenStore = _FakeAuthTokenStore()
      ..token = 'token-1'
      ..expiresAt = DateTime.utc(2026, 8, 16, 12);
    final accountRepository = _FakeOnlineAccountRepository()
      ..session = UserAccountSession(
        id: 'session-1',
        serverUserId: 'server-user-1',
        email: 'user@example.com',
        isLoggedIn: true,
        createdAt: DateTime.utc(2026, 7, 17, 11),
        updatedAt: DateTime.utc(2026, 7, 17, 11),
      );
    final remoteAuthApi = _FakeRemoteAuthApi()
      ..logoutException = const RemoteAuthException(RemoteAuthFailure.network);

    await _authUseCase(
      tokenStore: tokenStore,
      accountRepository: accountRepository,
      remoteAuthApi: remoteAuthApi,
      clock: clock,
    ).logout();

    expect(tokenStore.token, isNull);
    expect(accountRepository.session?.isLoggedIn, isFalse);
    expect(remoteAuthApi.logoutCalls, 1);
  });

  test('AuthUseCases currentSession reads local cache only', () async {
    final tokenStore = _FakeAuthTokenStore()..token = 'token-1';
    final accountRepository = _FakeOnlineAccountRepository()
      ..session = UserAccountSession(
        id: 'session-1',
        serverUserId: 'server-user-1',
        email: 'user@example.com',
        isLoggedIn: true,
        createdAt: DateTime.utc(2026, 7, 17, 11),
        updatedAt: DateTime.utc(2026, 7, 17, 11),
      );
    final remoteAuthApi = _FakeRemoteAuthApi();

    final session = await _authUseCase(
      tokenStore: tokenStore,
      accountRepository: accountRepository,
      remoteAuthApi: remoteAuthApi,
    ).currentSession();

    expect(session?.email, 'user@example.com');
    expect(remoteAuthApi.registerCalls, 0);
    expect(remoteAuthApi.loginCalls, 0);
    expect(remoteAuthApi.logoutCalls, 0);
  });

  test('SyncUseCases skips silently without token', () async {
    final remoteSyncApi = _FakeRemoteSyncApi();
    final metadataRepository = _FakeSyncMetadataRepository();
    final localChanges = _FakeLocalSyncChangeRepository();

    final summary = await _syncUseCase(
      tokenStore: _FakeAuthTokenStore(),
      remoteSyncApi: remoteSyncApi,
      metadataRepository: metadataRepository,
      localChanges: localChanges,
    ).synchronize(manual: true);

    expect(summary.skipped, isTrue);
    expect(remoteSyncApi.pushCalls, 0);
    expect(remoteSyncApi.pullCalls, 0);
    expect(metadataRepository.saved, isEmpty);
  });

  test('SyncUseCases successful push marks change log rows synced', () async {
    final tokenStore = _FakeAuthTokenStore()..token = 'token-1';
    final localChanges = _FakeLocalSyncChangeRepository()
      ..pendingChanges.add(_pendingExerciseChange());
    final remoteSyncApi = _FakeRemoteSyncApi()
      ..pushResult = RemoteSyncPushResult(
        serverCursor: 'cursor-1',
        results: [
          RemoteSyncPushItemResult(
            resourceType: SyncResourceType.exercise,
            clientId: 'exercise-1',
            serverId: 'server-exercise-1',
            status: RemoteSyncPushStatus.accepted,
            serverUpdatedAt: DateTime.utc(2026, 7, 17, 12, 1),
          ),
        ],
      );
    final mappingRepository = _FakeRemoteResourceMappingRepository();

    final summary = await _syncUseCase(
      tokenStore: tokenStore,
      remoteSyncApi: remoteSyncApi,
      mappingRepository: mappingRepository,
      localChanges: localChanges,
    ).synchronize(manual: true);

    expect(summary.pushedChanges, 1);
    expect(localChanges.syncedChangeLogIds, ['change-1']);
    expect(mappingRepository.saved.single.serverId, 'server-exercise-1');
  });

  test('SyncUseCases pull applies a newer remote item', () async {
    final tokenStore = _FakeAuthTokenStore()..token = 'token-1';
    final localChanges = _FakeLocalSyncChangeRepository()
      ..localUpdatedAt = DateTime.utc(2026, 7, 17, 11);
    final remoteSyncApi = _FakeRemoteSyncApi()
      ..pullResult = RemoteSyncPullResult(
        serverCursor: 'cursor-2',
        items: [
          _remoteExerciseItem(clientUpdatedAt: DateTime.utc(2026, 7, 17, 12)),
        ],
      );

    final summary = await _syncUseCase(
      tokenStore: tokenStore,
      remoteSyncApi: remoteSyncApi,
      localChanges: localChanges,
    ).synchronize(manual: true);

    expect(summary.pulledChanges, 1);
    expect(localChanges.appliedItems.single.clientId, 'exercise-1');
  });

  test('SyncUseCases pull ignores an older remote item', () async {
    final tokenStore = _FakeAuthTokenStore()..token = 'token-1';
    final localChanges = _FakeLocalSyncChangeRepository()
      ..localUpdatedAt = DateTime.utc(2026, 7, 17, 12);
    final remoteSyncApi = _FakeRemoteSyncApi()
      ..pullResult = RemoteSyncPullResult(
        serverCursor: 'cursor-2',
        items: [
          _remoteExerciseItem(clientUpdatedAt: DateTime.utc(2026, 7, 17, 11)),
        ],
      );

    final summary = await _syncUseCase(
      tokenStore: tokenStore,
      remoteSyncApi: remoteSyncApi,
      localChanges: localChanges,
    ).synchronize(manual: true);

    expect(summary.pulledChanges, 0);
    expect(localChanges.appliedItems, isEmpty);
  });

  test('SyncUseCases stores failure status without throwing', () async {
    final tokenStore = _FakeAuthTokenStore()..token = 'token-1';
    final metadataRepository = _FakeSyncMetadataRepository();
    final remoteSyncApi = _FakeRemoteSyncApi()
      ..exception = const RemoteAuthException(RemoteAuthFailure.network);

    final summary = await _syncUseCase(
      tokenStore: tokenStore,
      remoteSyncApi: remoteSyncApi,
      metadataRepository: metadataRepository,
    ).synchronize(manual: true);

    expect(summary.failed, isTrue);
    expect(metadataRepository.metadata.status, OnlineSyncStatus.failure);
    expect(metadataRepository.metadata.lastFailureAt, isNotNull);
  });

  test('score result enforces manual xor stopwatch values', () {
    expect(
      () => ActiveSetResult(
        metadata: _metadata('result-1'),
        activeWorkoutSessionId: 'session-1',
        programSnapshotId: 'program-1',
        exerciseSnapshotId: 'exercise-1',
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
        actualScore: 12,
        actualScoreTimeMs: 12000,
      ),
      throwsA(isA<DomainException>()),
    );
    expect(
      () => ActiveSetResult(
        metadata: _metadata('result-2'),
        activeWorkoutSessionId: 'session-1',
        programSnapshotId: 'program-1',
        exerciseSnapshotId: 'exercise-1',
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
        actualScore: 12,
        scoreInputModeSnapshot: ScoreInputMode.stopwatch,
      ),
      throwsA(isA<DomainException>()),
    );
    expect(
      () => ActiveSetResult(
        metadata: _metadata('result-3'),
        activeWorkoutSessionId: 'session-1',
        programSnapshotId: 'program-1',
        exerciseSnapshotId: 'exercise-1',
        programIndex: 0,
        exerciseIndex: 0,
        setIndex: 0,
        actualScoreTimeMs: 12000,
        scoreInputModeSnapshot: ScoreInputMode.manual,
      ),
      throwsA(isA<DomainException>()),
    );
  });
}

ExerciseStep _step({
  String id = 'step-1',
  int position = 0,
  String name = 'Phase',
  ExerciseStepType type = ExerciseStepType.time,
  int defaultTargetValue = 30,
  bool hasScore = false,
  ScoreInputMode scoreInputMode = ScoreInputMode.manual,
  String? scoreLabel,
  String? scoreUnit,
  double? defaultTargetScore,
  int? defaultTargetScoreTimeMs,
}) {
  return ExerciseStep(
    id: id,
    position: position,
    name: name,
    type: type,
    defaultTargetValue: defaultTargetValue,
    hasScore: hasScore,
    scoreInputMode: scoreInputMode,
    scoreLabel: scoreLabel,
    scoreUnit: scoreUnit,
    defaultTargetScore: defaultTargetScore,
    defaultTargetScoreTimeMs: defaultTargetScoreTimeMs,
  );
}

EntityMetadata _metadata(String id) {
  return EntityMetadata(
    id: id,
    createdAt: DateTime.utc(2026, 7, 17),
    updatedAt: DateTime.utc(2026, 7, 17),
    originDeviceId: 'device-1',
  );
}

final class _FakeClock implements Clock {
  _FakeClock(this.value);

  DateTime value;

  @override
  DateTime now() => value;
}

final class _FakeIds implements IdGenerator {
  var _next = 0;

  @override
  String newId() {
    _next += 1;
    return 'id-$_next';
  }
}

AuthUseCases _authUseCase({
  _FakeAuthTokenStore? tokenStore,
  _FakeOnlineAccountRepository? accountRepository,
  _FakeRemoteAuthApi? remoteAuthApi,
  _FakeClock? clock,
}) {
  return AuthUseCases(
    tokenStore: tokenStore ?? _FakeAuthTokenStore(),
    accountRepository: accountRepository ?? _FakeOnlineAccountRepository(),
    remoteAuthApi: remoteAuthApi ?? _FakeRemoteAuthApi(),
    clock: clock ?? _FakeClock(DateTime.utc(2026, 7, 17, 12)),
    ids: _FakeIds(),
  );
}

final class _FakeAuthTokenStore implements AuthTokenStore {
  String? token;
  DateTime? expiresAt;

  @override
  Future<void> clearToken() async {
    token = null;
    expiresAt = null;
  }

  @override
  Future<String?> readToken() async => token;

  @override
  Future<void> saveToken(String token, DateTime expiresAt) async {
    this.token = token;
    this.expiresAt = expiresAt;
  }
}

final class _FakeOnlineAccountRepository implements OnlineAccountRepository {
  UserAccountSession? session;
  var clearCalls = 0;

  @override
  Future<void> clearSession() async {
    clearCalls += 1;
    session = null;
  }

  @override
  Future<UserAccountSession?> currentSession() async => session;

  @override
  Future<void> saveSession(UserAccountSession session) async {
    this.session = session;
  }
}

final class _FakeRemoteAuthApi implements RemoteAuthApi {
  RemoteAuthException? registerException;
  RemoteAuthException? loginException;
  RemoteAuthException? logoutException;
  var registerCalls = 0;
  var loginCalls = 0;
  var logoutCalls = 0;

  @override
  Future<RemoteAuthResult> register({
    required String email,
    required String password,
    String? displayName,
  }) async {
    registerCalls += 1;
    final exception = registerException;
    if (exception != null) {
      throw exception;
    }
    return _authResult(email);
  }

  @override
  Future<RemoteAuthResult> login({
    required String email,
    required String password,
  }) async {
    loginCalls += 1;
    final exception = loginException;
    if (exception != null) {
      throw exception;
    }
    return _authResult(email);
  }

  @override
  Future<void> logout(String token) async {
    logoutCalls += 1;
    final exception = logoutException;
    if (exception != null) {
      throw exception;
    }
  }

  RemoteAuthResult _authResult(String email) {
    return RemoteAuthResult(
      userId: 'server-user-1',
      email: email.trim().toLowerCase(),
      token: 'token-1',
      expiresAt: DateTime.utc(2026, 8, 16, 12),
    );
  }
}

SyncUseCases _syncUseCase({
  _FakeAuthTokenStore? tokenStore,
  _FakeRemoteSyncApi? remoteSyncApi,
  _FakeSyncMetadataRepository? metadataRepository,
  _FakeRemoteResourceMappingRepository? mappingRepository,
  _FakeLocalSyncChangeRepository? localChanges,
  _FakeClock? clock,
}) {
  return SyncUseCases(
    tokenStore: tokenStore ?? (_FakeAuthTokenStore()..token = 'token-1'),
    remoteSyncApi: remoteSyncApi ?? _FakeRemoteSyncApi(),
    metadataRepository: metadataRepository ?? _FakeSyncMetadataRepository(),
    mappingRepository:
        mappingRepository ?? _FakeRemoteResourceMappingRepository(),
    localChanges: localChanges ?? _FakeLocalSyncChangeRepository(),
    clock: clock ?? _FakeClock(DateTime.utc(2026, 7, 17, 12)),
    deviceId: 'device-1',
  );
}

final class _FakeRemoteSyncApi implements RemoteSyncApi {
  RemoteSyncPushResult pushResult = const RemoteSyncPushResult(
    serverCursor: null,
    results: [],
  );
  RemoteSyncPullResult pullResult = const RemoteSyncPullResult(
    serverCursor: null,
    items: [],
  );
  Exception? exception;
  var pushCalls = 0;
  var pullCalls = 0;

  @override
  Future<RemoteSyncPushResult> push({
    required String deviceId,
    required List<RemoteSyncPushItem> items,
    required String token,
  }) async {
    pushCalls += 1;
    final error = exception;
    if (error != null) {
      throw error;
    }
    return pushResult;
  }

  @override
  Future<RemoteSyncPullResult> pull({
    required String? since,
    required String token,
  }) async {
    pullCalls += 1;
    final error = exception;
    if (error != null) {
      throw error;
    }
    return pullResult;
  }
}

final class _FakeSyncMetadataRepository implements SyncMetadataRepository {
  SyncMetadataSnapshot metadata = const SyncMetadataSnapshot();
  final saved = <SyncMetadataSnapshot>[];

  @override
  Future<SyncMetadataSnapshot> read() async => metadata;

  @override
  Future<void> save(SyncMetadataSnapshot metadata) async {
    this.metadata = metadata;
    saved.add(metadata);
  }
}

final class _FakeRemoteResourceMappingRepository
    implements RemoteResourceMappingRepository {
  final saved = <RemoteResourceMapping>[];

  @override
  Future<RemoteResourceMapping?> find({
    required SyncResourceType resourceType,
    required String clientId,
  }) async {
    return saved
        .where(
          (mapping) =>
              mapping.resourceType == resourceType &&
              mapping.clientId == clientId,
        )
        .firstOrNull;
  }

  @override
  Future<void> save(RemoteResourceMapping mapping) async {
    saved.removeWhere(
      (existing) =>
          existing.resourceType == mapping.resourceType &&
          existing.clientId == mapping.clientId,
    );
    saved.add(mapping);
  }
}

final class _FakeLocalSyncChangeRepository
    implements LocalSyncChangeRepository {
  final pendingChanges = <PendingSyncChange>[];
  final syncedChangeLogIds = <String>[];
  final appliedItems = <RemoteSyncedItem>[];
  DateTime? localUpdatedAt;

  @override
  Future<List<PendingSyncChange>> listPendingChanges() async {
    return pendingChanges;
  }

  @override
  Future<void> markChangesSynced(
    List<String> changeLogIds,
    DateTime syncedAt,
  ) async {
    syncedChangeLogIds.addAll(changeLogIds);
  }

  @override
  Future<bool> applyRemoteItem(RemoteSyncedItem item) async {
    final updatedAt = localUpdatedAt;
    if (updatedAt != null && !item.clientUpdatedAt.isAfter(updatedAt)) {
      return false;
    }
    appliedItems.add(item);
    localUpdatedAt = item.clientUpdatedAt;
    return true;
  }
}

PendingSyncChange _pendingExerciseChange() {
  return PendingSyncChange(
    changeLogIds: const ['change-1'],
    item: RemoteSyncPushItem(
      resourceType: SyncResourceType.exercise,
      clientId: 'exercise-1',
      schemaVersion: 1,
      clientUpdatedAt: DateTime.utc(2026, 7, 17, 12),
      deletedAt: null,
      payload: const {'id': 'exercise-1', 'name': 'Squat'},
    ),
  );
}

RemoteSyncedItem _remoteExerciseItem({required DateTime clientUpdatedAt}) {
  return RemoteSyncedItem(
    resourceType: SyncResourceType.exercise,
    clientId: 'exercise-1',
    serverId: 'server-exercise-1',
    schemaVersion: 1,
    clientUpdatedAt: clientUpdatedAt,
    serverUpdatedAt: DateTime.utc(2026, 7, 17, 12, 1),
    deletedAt: null,
    payload: const {'id': 'exercise-1', 'name': 'Squat'},
  );
}

ExerciseUseCases _exerciseUseCase(
  _FakeExerciseRepository repository, {
  _FakeProgramRepository? programRepository,
}) {
  return ExerciseUseCases(
    repository: repository,
    programRepository: programRepository ?? _FakeProgramRepository(),
    clock: _FakeClock(DateTime.utc(2026, 7, 17, 12)),
    ids: _FakeIds(),
    originDeviceId: 'device-1',
  );
}

ProgramExercise _programExercise({
  required String id,
  required String programId,
  required String sourceExerciseId,
  required int position,
}) {
  return ProgramExercise(
    metadata: _metadata(id),
    programId: programId,
    sourceExerciseId: sourceExerciseId,
    position: position,
    exerciseNameSnapshot: 'Exercise $id',
    availableTimeSnapshot: false,
    availableRepsSnapshot: true,
    availableScoreSnapshot: false,
    setsCount: 3,
    timeEnabled: false,
    repsEnabled: true,
    scoreEnabled: false,
    targetReps: 10,
  );
}

WorkoutTemplateProgram _templateProgram({
  required String id,
  required String workoutTemplateId,
  required String sourceProgramId,
  required int position,
}) {
  return WorkoutTemplateProgram(
    metadata: _metadata(id),
    workoutTemplateId: workoutTemplateId,
    sourceProgramId: sourceProgramId,
    position: position,
    programNameSnapshot: 'Program $id',
    defaultRestSecondsSnapshot: 60,
    programSnapshotJson: '{"exercises":[]}',
  );
}

final class _FakeExerciseRepository implements ExerciseRepository {
  Exercise? exercise;
  final saved = <Exercise>[];

  @override
  Future<Exercise?> findById(String id) async {
    return exercise?.metadata.id == id ? exercise : null;
  }

  @override
  Future<bool> isReferencedByProgram(String id) async => false;

  @override
  Future<List<Exercise>> listActive() async =>
      exercise == null || exercise!.metadata.deletedAt != null
      ? const []
      : [exercise!];

  @override
  Future<void> save(Exercise exercise) async {
    this.exercise = exercise;
    saved.add(exercise);
  }
}

final class _FakeWorkoutTemplateRepository
    implements WorkoutTemplateRepository {
  final templates = <WorkoutTemplate>[];

  @override
  Future<WorkoutTemplate?> findById(String id) async {
    for (final template in templates) {
      if (template.metadata.id == id && template.metadata.deletedAt == null) {
        return template;
      }
    }
    return null;
  }

  @override
  Future<List<WorkoutTemplate>> listActive() async {
    return templates
        .where((template) => template.metadata.deletedAt == null)
        .toList();
  }

  @override
  Future<void> replaceComposition(
    WorkoutTemplate template,
    DateTime deletedAt,
  ) async {
    await save(template);
  }

  @override
  Future<void> save(WorkoutTemplate template) async {
    templates.removeWhere((saved) => saved.metadata.id == template.metadata.id);
    templates.add(template);
  }

  @override
  Future<void> saveOverride(WorkoutTemplateExerciseOverride override) async {}

  @override
  Future<void> saveProgram(WorkoutTemplateProgram program) async {}
}

final class _FakeProgramRepository implements ProgramRepository {
  final programs = <Program>[];

  @override
  Future<Program?> findById(String id) async {
    for (final program in programs) {
      if (program.metadata.id == id && program.metadata.deletedAt == null) {
        return program;
      }
    }
    return null;
  }

  @override
  Future<List<Program>> listActive() async {
    return programs
        .where((program) => program.metadata.deletedAt == null)
        .toList();
  }

  @override
  Future<void> replaceExercises(Program program, DateTime deletedAt) async {
    await save(program);
  }

  @override
  Future<void> save(Program program) async {
    programs.removeWhere((saved) => saved.metadata.id == program.metadata.id);
    programs.add(program);
  }

  @override
  Future<void> saveExercise(ProgramExercise exercise) async {
    final index = programs.indexWhere(
      (program) => program.metadata.id == exercise.programId,
    );
    if (index == -1) {
      return;
    }
    final program = programs[index];
    programs[index] = program.copyWith(
      exercises: [
        ...program.exercises.where(
          (saved) => saved.metadata.id != exercise.metadata.id,
        ),
        exercise,
      ],
    );
  }
}

ActiveWorkoutSessionUseCases _activeUseCase(
  _FakeActiveSessionRepository repository,
  _FakeClock clock,
) {
  return ActiveWorkoutSessionUseCases(
    sessionRepository: repository,
    templateRepository: _FakeWorkoutTemplateRepository(),
    clock: clock,
    ids: _FakeIds(),
    originDeviceId: 'device-1',
  );
}

final class _FakeActiveSessionRepository implements ActiveSessionRepository {
  ActiveWorkoutSession? session;
  final results = <ActiveSetResult>[];
  final restStates = <String, ActiveRestState>{};
  final scoreStopwatchStates = <String, ActiveScoreStopwatchState>{};
  final stepProgressStates = <String, ActiveExerciseStepProgressState>{};
  final stepResults = <ActiveExerciseStepResult>[];

  @override
  Future<ActiveWorkoutSession?> findById(String id) async {
    return session?.metadata.id == id ? session : null;
  }

  @override
  Future<ActiveWorkoutSession?> findOpen() async => session;

  @override
  Future<ActiveRestState?> findRestStateById(String id) async => restStates[id];

  @override
  Future<ActiveScoreStopwatchState?> findScoreStopwatchState({
    required String sessionId,
    required int programIndex,
    required int exerciseIndex,
    required int setIndex,
  }) async {
    return scoreStopwatchStates.values
        .where(
          (state) =>
              state.activeWorkoutSessionId == sessionId &&
              state.programIndex == programIndex &&
              state.exerciseIndex == exerciseIndex &&
              state.setIndex == setIndex &&
              state.metadata.deletedAt == null,
        )
        .firstOrNull;
  }

  @override
  Future<ActiveExerciseStepProgressState?> findExerciseStepProgressState({
    required String sessionId,
    required int programIndex,
    required int exerciseIndex,
    required int setIndex,
  }) async {
    return stepProgressStates.values
        .where(
          (state) =>
              state.activeWorkoutSessionId == sessionId &&
              state.programIndex == programIndex &&
              state.exerciseIndex == exerciseIndex &&
              state.setIndex == setIndex &&
              state.metadata.deletedAt == null,
        )
        .firstOrNull;
  }

  @override
  Future<List<ActiveRestState>> listRestStates(String sessionId) async {
    return restStates.values
        .where((rest) => rest.activeWorkoutSessionId == sessionId)
        .toList();
  }

  @override
  Future<List<ActiveScoreStopwatchState>> listScoreStopwatchStates(
    String sessionId,
  ) async {
    return scoreStopwatchStates.values
        .where(
          (state) =>
              state.activeWorkoutSessionId == sessionId &&
              state.metadata.deletedAt == null,
        )
        .toList();
  }

  @override
  Future<List<ActiveSetResult>> listSetResults(String sessionId) async {
    return results
        .where((result) => result.activeWorkoutSessionId == sessionId)
        .toList();
  }

  @override
  Future<List<ActiveExerciseStepProgressState>> listExerciseStepProgressStates(
    String sessionId,
  ) async {
    return stepProgressStates.values
        .where((state) => state.activeWorkoutSessionId == sessionId)
        .toList();
  }

  @override
  Future<List<ActiveExerciseStepResult>> listExerciseStepResults(
    String sessionId,
  ) async {
    return stepResults
        .where((result) => result.activeWorkoutSessionId == sessionId)
        .toList();
  }

  @override
  Future<void> save(ActiveWorkoutSession session) async {
    this.session = session;
  }

  @override
  Future<void> saveRestState(ActiveRestState restState) async {
    restStates[restState.metadata.id] = restState;
  }

  @override
  Future<void> saveScoreStopwatchState(ActiveScoreStopwatchState state) async {
    scoreStopwatchStates[state.metadata.id] = state;
  }

  @override
  Future<void> saveExerciseStepProgressState(
    ActiveExerciseStepProgressState state,
  ) async {
    stepProgressStates[state.metadata.id] = state;
  }

  @override
  Future<void> saveExerciseStepResult(ActiveExerciseStepResult result) async {
    stepResults.removeWhere(
      (existing) =>
          existing.activeWorkoutSessionId == result.activeWorkoutSessionId &&
          existing.programIndex == result.programIndex &&
          existing.exerciseIndex == result.exerciseIndex &&
          existing.setIndex == result.setIndex &&
          existing.passageIndex == result.passageIndex &&
          existing.stepIndex == result.stepIndex,
    );
    stepResults.add(result);
  }

  @override
  Future<void> deleteScoreStopwatchState({
    required String sessionId,
    required int programIndex,
    required int exerciseIndex,
    required int setIndex,
    required DateTime deletedAt,
  }) async {
    final state = await findScoreStopwatchState(
      sessionId: sessionId,
      programIndex: programIndex,
      exerciseIndex: exerciseIndex,
      setIndex: setIndex,
    );
    if (state == null) {
      return;
    }
    scoreStopwatchStates.remove(state.metadata.id);
  }

  @override
  Future<void> saveSetResult(ActiveSetResult result) async {
    results.removeWhere(
      (existing) =>
          existing.activeWorkoutSessionId == result.activeWorkoutSessionId &&
          existing.programIndex == result.programIndex &&
          existing.exerciseIndex == result.exerciseIndex &&
          existing.setIndex == result.setIndex,
    );
    results.add(result);
  }
}

ActiveWorkoutSession _sessionWithSnapshot({
  required int currentProgramIndex,
  required int currentExerciseIndex,
  required int currentSetIndex,
  int setsCount = 2,
  int targetReps = 10,
  List<ExerciseStep> exerciseSteps = const [],
}) {
  return ActiveWorkoutSession(
    metadata: _metadata('session-1'),
    status: ActiveWorkoutStatus.running,
    startedAt: DateTime.utc(2026, 7, 17, 12),
    lastPersistedAt: DateTime.utc(2026, 7, 17, 12),
    elapsedActiveMs: 0,
    currentProgramIndex: currentProgramIndex,
    currentExerciseIndex: currentExerciseIndex,
    currentSetIndex: currentSetIndex,
    resolvedTemplateSnapshotJson: jsonEncode({
      'programs': [
        {
          'id': 'program-snapshot-1',
          'programNameSnapshot': 'Programme',
          'programSnapshotJson': jsonEncode({
            'exercises': [
              {
                'id': 'exercise-snapshot-1',
                'exerciseNameSnapshot': 'Squat',
                'setsCount': setsCount,
                'timeEnabled': false,
                'repsEnabled': true,
                'scoreEnabled': false,
                'targetReps': targetReps,
                'exerciseStepsSnapshot': exerciseSteps
                    .map((step) => step.toSnapshotJson())
                    .toList(),
              },
            ],
          }),
        },
      ],
    }),
  );
}