import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:relationship_saver/features/local/local_models.dart';
import 'package:relationship_saver/features/local/local_repository.dart';
import 'package:relationship_saver/features/local/storage/local_data_store_in_memory.dart';
import 'package:relationship_saver/features/local/storage/local_data_store_provider.dart';
import 'package:relationship_saver/features/reminders/scheduling/reminder_scheduler.dart';
import 'package:relationship_saver/features/reminders/scheduling/reminder_scheduler_provider.dart';
import 'package:relationship_saver/features/sync/storage/sync_state_store_in_memory.dart';
import 'package:relationship_saver/features/sync/storage/sync_state_store_provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

void main() {
  setUp(() {
    SharedPreferences.setMockInitialValues(<String, Object>{});
  });

  test('seeds local data on first load', () async {
    final ProviderContainer container = _createContainer();
    addTearDown(container.dispose);

    final state = await container.read(localRepositoryProvider.future);

    expect(state.people, isNotEmpty);
    expect(state.moments, isNotEmpty);
    expect(state.tasks, isNotEmpty);
  });

  test('adds and removes person with persistence state update', () async {
    final ProviderContainer container = _createContainer();
    addTearDown(container.dispose);

    final initial = await container.read(localRepositoryProvider.future);
    final int initialCount = initial.people.length;

    await container
        .read(localRepositoryProvider.notifier)
        .addPerson(
          name: 'Test Person',
          relationship: 'Friend',
          notes: 'test',
          tags: <String>['alpha'],
          location: 'Berlin',
        );

    final afterAdd = await container.read(localRepositoryProvider.future);
    expect(afterAdd.people.length, initialCount + 1);
    expect(afterAdd.people.first.location, 'Berlin');

    final String insertedId = afterAdd.people.first.id;
    await container
        .read(localRepositoryProvider.notifier)
        .deletePerson(insertedId);

    final afterDelete = await container.read(localRepositoryProvider.future);
    expect(afterDelete.people.length, initialCount);
  });

  test('adds and removes capture moments', () async {
    final ProviderContainer container = _createContainer();
    addTearDown(container.dispose);

    final state = await container.read(localRepositoryProvider.future);
    final String personId = state.people.first.id;
    final int beforeCount = state.moments.length;

    await container
        .read(localRepositoryProvider.notifier)
        .addMoment(personId: personId, summary: 'This is a new capture moment');

    final withMoment = await container.read(localRepositoryProvider.future);
    expect(withMoment.moments.length, beforeCount + 1);

    final String momentId = withMoment.moments.first.id;
    await container
        .read(localRepositoryProvider.notifier)
        .deleteMoment(momentId);

    final afterDelete = await container.read(localRepositoryProvider.future);
    expect(afterDelete.moments.length, beforeCount);
  });

  test(
    'ingestSharedMessage auto-creates profile and reuses source link for follow-up messages',
    () async {
      final ProviderContainer container = _createContainer();
      addTearDown(container.dispose);

      final LocalDataState before = await container.read(
        localRepositoryProvider.future,
      );

      final SharedMessageIngestResult first = await container
          .read(localRepositoryProvider.notifier)
          .ingestSharedMessage(
            const SharedMessageIngestInput(
              sourceApp: 'whatsapp',
              sourceDisplayName: 'Taylor Quinn',
              sourceUserId: 'wa:taylor quinn',
              messageText: 'Can we do coffee this week?',
            ),
          );

      final LocalDataState afterFirst = await container.read(
        localRepositoryProvider.future,
      );
      expect(first.createdProfile, isTrue);
      expect(afterFirst.people.length, before.people.length + 1);
      expect(
        afterFirst.sourceLinks.any((link) => link.profileId == first.profileId),
        isTrue,
      );
      expect(
        afterFirst.moments.any(
          (RelationshipMoment moment) =>
              moment.personId == first.profileId && moment.type == 'whatsapp',
        ),
        isTrue,
      );

      final SharedMessageIngestResult second = await container
          .read(localRepositoryProvider.notifier)
          .ingestSharedMessage(
            const SharedMessageIngestInput(
              sourceApp: 'whatsapp',
              sourceDisplayName: 'Taylor Quinn',
              sourceUserId: 'wa:taylor quinn',
              messageText: 'Lets plan Sunday brunch too.',
            ),
          );

      final LocalDataState afterSecond = await container.read(
        localRepositoryProvider.future,
      );
      expect(second.createdProfile, isFalse);
      expect(second.profileId, first.profileId);
      expect(afterSecond.people.length, afterFirst.people.length);
      expect(
        afterSecond.sharedMessages.length,
        afterFirst.sharedMessages.length + 1,
      );
    },
  );

  test('adds, archives, edits, and deletes ideas', () async {
    final ProviderContainer container = _createContainer();
    addTearDown(container.dispose);

    final LocalDataState state = await container.read(
      localRepositoryProvider.future,
    );
    final String personId = state.people.first.id;
    final int beforeCount = state.ideas.length;

    await container
        .read(localRepositoryProvider.notifier)
        .addIdea(
          type: IdeaType.gift,
          title: 'Test idea',
          details: 'some details',
          personId: personId,
        );

    final LocalDataState afterAdd = await container.read(
      localRepositoryProvider.future,
    );
    expect(afterAdd.ideas.length, beforeCount + 1);

    final RelationshipIdea inserted = afterAdd.ideas.first;
    await container
        .read(localRepositoryProvider.notifier)
        .toggleIdeaArchived(inserted.id);

    LocalDataState afterArchive = await container.read(
      localRepositoryProvider.future,
    );
    expect(afterArchive.ideas.first.isArchived, isTrue);

    await container
        .read(localRepositoryProvider.notifier)
        .updateIdea(afterArchive.ideas.first.copyWith(title: 'Updated idea'));

    afterArchive = await container.read(localRepositoryProvider.future);
    expect(afterArchive.ideas.first.title, 'Updated idea');

    await container
        .read(localRepositoryProvider.notifier)
        .deleteIdea(inserted.id);

    final LocalDataState afterDelete = await container.read(
      localRepositoryProvider.future,
    );
    expect(afterDelete.ideas.length, beforeCount);
  });

  test('adds, updates, toggles, and deletes reminders', () async {
    final ProviderContainer container = _createContainer();
    addTearDown(container.dispose);

    final LocalDataState state = await container.read(
      localRepositoryProvider.future,
    );
    final String personId = state.people.first.id;
    final int beforeCount = state.reminders.length;

    await container
        .read(localRepositoryProvider.notifier)
        .addReminder(
          title: 'Test reminder',
          cadence: ReminderCadence.weekly,
          nextAt: DateTime.now().add(const Duration(days: 1)),
          personId: personId,
        );

    LocalDataState afterAdd = await container.read(
      localRepositoryProvider.future,
    );
    expect(afterAdd.reminders.length, beforeCount + 1);

    final ReminderRule inserted = afterAdd.reminders.first;
    await container
        .read(localRepositoryProvider.notifier)
        .toggleReminderEnabled(inserted.id);
    afterAdd = await container.read(localRepositoryProvider.future);
    expect(afterAdd.reminders.first.enabled, isFalse);

    await container
        .read(localRepositoryProvider.notifier)
        .updateReminder(
          afterAdd.reminders.first.copyWith(title: 'Updated reminder'),
        );
    afterAdd = await container.read(localRepositoryProvider.future);
    expect(afterAdd.reminders.first.title, 'Updated reminder');

    await container
        .read(localRepositoryProvider.notifier)
        .deleteReminder(inserted.id);

    final LocalDataState afterDelete = await container.read(
      localRepositoryProvider.future,
    );
    expect(afterDelete.reminders.length, beforeCount);
  });

  test('reconciles reminder schedule after state changes', () async {
    final RecordingReminderScheduler scheduler = RecordingReminderScheduler();
    final ProviderContainer container = _createContainer(scheduler: scheduler);
    addTearDown(container.dispose);

    final LocalDataState initial = await container.read(
      localRepositoryProvider.future,
    );
    final int beforeCount = initial.reminders.length;

    await container
        .read(localRepositoryProvider.notifier)
        .addReminder(
          title: 'Scheduled reminder',
          cadence: ReminderCadence.daily,
          nextAt: DateTime.now().add(const Duration(hours: 4)),
        );
    final LocalDataState afterAdd = await container.read(
      localRepositoryProvider.future,
    );

    await container
        .read(localRepositoryProvider.notifier)
        .deleteReminder(afterAdd.reminders.first.id);
    final LocalDataState afterDelete = await container.read(
      localRepositoryProvider.future,
    );

    expect(scheduler.snapshots, isNotEmpty);
    expect(scheduler.snapshots.first.length, beforeCount);
    expect(
      scheduler.snapshots.any(
        (List<ReminderRule> r) => r.length == beforeCount + 1,
      ),
      isTrue,
    );
    expect(scheduler.snapshots.last.length, afterDelete.reminders.length);
  });
}

ProviderContainer _createContainer({ReminderScheduler? scheduler}) {
  return ProviderContainer(
    overrides: [
      localDataStoreProvider.overrideWithValue(InMemoryLocalDataStore()),
      syncStateStoreProvider.overrideWithValue(InMemorySyncStateStore()),
      if (scheduler != null)
        reminderSchedulerProvider.overrideWithValue(scheduler),
    ],
  );
}

class RecordingReminderScheduler implements ReminderScheduler {
  final List<List<ReminderRule>> snapshots = <List<ReminderRule>>[];

  @override
  Future<void> clearAll() async {}

  @override
  Future<bool> requestPermissions() async => true;

  @override
  Future<void> reconcile(List<ReminderRule> reminders) async {
    snapshots.add(List<ReminderRule>.unmodifiable(reminders));
  }
}