import 'dart:async';
import 'dart:convert';
import 'package:plezy/media/ids.dart';

import 'package:flutter_test/flutter_test.dart';
import 'package:plezy/services/base_shared_preferences_service.dart';
import 'package:plezy/services/storage_service.dart';

import '../test_helpers/prefs.dart';

class _GatedPreferencesService extends BaseSharedPreferencesService {
  _GatedPreferencesService(this.started, this.release);

  final Completer<void> started;
  final Future<void> release;

  @override
  Future<void> onInit() async {
    started.complete();
    await release;
  }
}

void main() {
  setUp(resetSharedPreferencesForTest);

  group('StorageService.getInstance', () {
    test('returns same singleton instance', () async {
      final a = await StorageService.getInstance();
      final b = await StorageService.getInstance();
      expect(identical(a, b), isTrue);
    });

    test('coalesces callers until asynchronous initialization completes', () async {
      final started = Completer<void>();
      final release = Completer<void>();
      var constructorCalls = 0;

      Future<_GatedPreferencesService> acquire() => BaseSharedPreferencesService.initializeInstance(() {
        constructorCalls++;
        return _GatedPreferencesService(started, release.future);
      });

      final first = acquire();
      await started.future;
      var secondCompleted = false;
      final second = acquire().then((instance) {
        secondCompleted = true;
        return instance;
      });
      await Future<void>.delayed(Duration.zero);

      expect(secondCompleted, isFalse);
      expect(constructorCalls, 1);

      release.complete();
      final instances = await Future.wait([first, second]);
      expect(identical(instances.first, instances.last), isTrue);
    });

    test('reset rebuilds against current SharedPreferences', () async {
      final first = await StorageService.getInstance();
      await first.prefs.setString('plex_token', 'token-1');
      BaseSharedPreferencesService.resetForTesting();

      final second = await StorageService.getInstance();
      expect(identical(first, second), isFalse);
      // Reset only the cached singleton, not the underlying prefs — values survive.
      // ignore: deprecated_member_use_from_same_package
      expect(second.getPlexToken(), 'token-1');
    });
  });

  // ============================================================
  // Plex token / client identifier (legacy, retained for migration)
  // ============================================================

  group('PlexToken & ClientIdentifier (legacy migration slots)', () {
    test('getPlexToken reads the legacy slot', () async {
      final s = await StorageService.getInstance();
      // ignore: deprecated_member_use_from_same_package
      expect(s.getPlexToken(), isNull);
      await s.prefs.setString('plex_token', 'abc-123');
      // ignore: deprecated_member_use_from_same_package
      expect(s.getPlexToken(), 'abc-123');
    });

    test('getOrCreateClientIdentifier returns existing value when set', () async {
      final s = await StorageService.getInstance();
      await s.prefs.setString('client_identifier', 'preset-id');
      final result = await s.getOrCreateClientIdentifier();
      expect(result, 'preset-id');
    });

    test('getOrCreateClientIdentifier generates and persists a UUID on first call', () async {
      final s = await StorageService.getInstance();

      final generated = await s.getOrCreateClientIdentifier();
      expect(generated, isNotEmpty);
      // UUIDv4 has 5 hyphen-separated segments.
      expect(generated.split('-'), hasLength(5));

      // Second call returns the same value, not a new UUID.
      final again = await s.getOrCreateClientIdentifier();
      expect(again, generated);
    });

    test('getOrCreateClientIdentifier replaces empty stored value', () async {
      final s = await StorageService.getInstance();
      await s.prefs.setString('client_identifier', '');
      final generated = await s.getOrCreateClientIdentifier();
      expect(generated, isNotEmpty);
    });
  });

  // ============================================================
  // Server endpoints (per-server URL caching)
  // ============================================================

  group('ServerEndpoint', () {
    test('round-trip per server id', () async {
      final s = await StorageService.getInstance();
      await s.saveServerEndpoint(ServerId('srv-1'), 'http://192.0.2.1:32400');
      await s.saveServerEndpoint(ServerId('srv-2'), 'http://198.51.100.5:32400');

      expect(s.getServerEndpoint(ServerId('srv-1')), 'http://192.0.2.1:32400');
      expect(s.getServerEndpoint(ServerId('srv-2')), 'http://198.51.100.5:32400');
      expect(s.getServerEndpoint(ServerId('missing')), isNull);
    });

    test('clearServerEndpoint removes only the targeted id', () async {
      final s = await StorageService.getInstance();
      await s.saveServerEndpoint(ServerId('srv-1'), 'http://example.test');
      await s.saveServerEndpoint(ServerId('srv-2'), 'http://other.test');
      await s.clearServerEndpoint(ServerId('srv-1'));
      expect(s.getServerEndpoint(ServerId('srv-1')), isNull);
      expect(s.getServerEndpoint(ServerId('srv-2')), 'http://other.test');
    });
  });

  // ============================================================
  // Multi-server slot (legacy, only `getServersListJson` retained for migration)
  // ============================================================

  group('Servers list (legacy migration slot)', () {
    test('legacy raw read returns null when nothing is stored', () async {
      final s = await StorageService.getInstance();
      // ignore: deprecated_member_use_from_same_package
      expect(s.getServersListJson(), isNull);
    });

    test('clearServersList removes the value', () async {
      final s = await StorageService.getInstance();
      // Write directly under the legacy key — the public setter is gone.
      await s.prefs.setString('servers_list', '[{"x":1}]');
      // ignore: deprecated_member_use_from_same_package
      expect(s.getServersListJson(), '[{"x":1}]');
      await s.clearServersList();
      // ignore: deprecated_member_use_from_same_package
      expect(s.getServersListJson(), isNull);
    });

    test('clearMultiServerData clears legacy list + order + endpoint prefixes', () async {
      final s = await StorageService.getInstance();
      // Write legacy values directly — the setters are gone.
      await s.prefs.setString('servers_list', '[{"x":1}]');
      await s.prefs.setString('server_order', json.encode(['a', 'b']));
      await s.saveServerEndpoint(ServerId('a'), 'http://foo.test');
      await s.saveServerEndpoint(ServerId('b'), 'http://bar.test');

      await s.clearMultiServerData();

      // ignore: deprecated_member_use_from_same_package
      expect(s.getServersListJson(), isNull);
      expect(s.prefs.getString('server_order'), isNull);
      expect(s.getServerEndpoint(ServerId('a')), isNull);
      expect(s.getServerEndpoint(ServerId('b')), isNull);
    });
  });

  // ============================================================
  // Hidden libraries (Set<String> persisted as JSON list)
  // ============================================================

  group('Hidden libraries', () {
    test('default is empty set', () async {
      final s = await StorageService.getInstance();
      expect(s.getHiddenLibraries(), isEmpty);
    });

    test('save + read round-trip', () async {
      final s = await StorageService.getInstance();
      await s.saveHiddenLibraries({'lib-a', 'lib-b'});
      expect(s.getHiddenLibraries(), equals({'lib-a', 'lib-b'}));
    });

    test('explicit profile helpers isolate hidden libraries from active profile changes', () async {
      final s = await StorageService.getInstance();

      await s.setActiveProfileId('owner');
      await s.saveHiddenLibrariesForProfile('owner', {'srv:movies'});
      await s.setActiveProfileId('kids');
      await s.saveHiddenLibrariesForProfile('kids', {'srv:kids'});

      expect(s.getHiddenLibrariesForProfile('owner'), {'srv:movies'});
      expect(s.getHiddenLibrariesForProfile('kids'), {'srv:kids'});
      expect(s.getHiddenLibraries(), {'srv:kids'});
    });

    test('overwrite replaces previous set', () async {
      final s = await StorageService.getInstance();
      await s.saveHiddenLibraries({'lib-a', 'lib-b'});
      await s.saveHiddenLibraries({'lib-c'});
      expect(s.getHiddenLibraries(), equals({'lib-c'}));
    });

    test('saving empty set persists empty set (not null)', () async {
      final s = await StorageService.getInstance();
      await s.saveHiddenLibraries({'x'});
      await s.saveHiddenLibraries({});
      expect(s.getHiddenLibraries(), isEmpty);
    });

    test('survives garbage JSON by returning empty set', () async {
      final s = await StorageService.getInstance();
      // Write garbage directly under the key getHiddenLibraries() will read.
      await s.prefs.setString('hidden_libraries', 'not-json');
      expect(s.getHiddenLibraries(), isEmpty);
    });
  });

  // ============================================================
  // Library order (List<String>) — scoped to active profile
  // ============================================================

  group('Library order', () {
    test('default is null', () async {
      final s = await StorageService.getInstance();
      expect(s.getLibraryOrder(), isNull);
    });

    test('round-trip preserves order', () async {
      final s = await StorageService.getInstance();
      await s.saveLibraryOrder(['c', 'a', 'b']);
      expect(s.getLibraryOrder(), ['c', 'a', 'b']);
    });

    test('legacy unscoped value migrates into scoped key when an active profile is set', () async {
      final s = await StorageService.getInstance();

      // Write a legacy (unscoped) library order, mimicking pre-multi-user data.
      await s.prefs.setString('library_order', json.encode(['x', 'y']));

      // Set an active profile so reads/writes become scoped.
      await s.setActiveProfileId('local-user-1');

      final read = s.getLibraryOrder();
      expect(read, ['x', 'y']);

      // Migration should have copied the legacy value under the scoped key.
      final scopedRaw = s.prefs.getString('user_local-user-1_library_order');
      expect(scopedRaw, json.encode(['x', 'y']));
      expect(s.prefs.getString('library_order'), isNull);
    });

    test('migrated legacy order is not inherited by another profile', () async {
      final s = await StorageService.getInstance();
      await s.prefs.setString('library_order', json.encode(['legacy']));

      await s.setActiveProfileId('local-user-1');
      expect(s.getLibraryOrder(), ['legacy']);

      await s.setActiveProfileId('local-user-2');
      expect(s.getLibraryOrder(), isNull);
    });

    test('per-user scoping isolates orders', () async {
      final s = await StorageService.getInstance();

      await s.setActiveProfileId('local-user-1');
      await s.saveLibraryOrder(['u1-a', 'u1-b']);

      await s.setActiveProfileId('local-user-2');
      expect(s.getLibraryOrder(), isNull);
      await s.saveLibraryOrder(['u2-a']);

      // Switch back — user-1 sees their own list.
      await s.setActiveProfileId('local-user-1');
      expect(s.getLibraryOrder(), ['u1-a', 'u1-b']);

      await s.setActiveProfileId('local-user-2');
      expect(s.getLibraryOrder(), ['u2-a']);
    });

    test('plex_home profile id parses out the home-user UUID for the prefix', () async {
      final s = await StorageService.getInstance();
      // Format: `plex-home-{accountConnectionId}-{homeUserUuid}` where both
      // the accountConnectionId AND the UUID contain hyphens. The scope must
      // be the FULL 36-char UUID — `lastIndexOf('-')` would slice inside the
      // UUID and break legacy `currentUserUUID`-scoped storage migration.
      await s.setActiveProfileId('plex-home-plex.abc-def-123-aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee');
      await s.saveLibraryOrder(['x']);
      expect(s.prefs.getString('user_aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee_library_order'), json.encode(['x']));
    });

    test('legacy currentUserUUID scope migrates into the plex-home profile slot', () async {
      // Regression: with the old `lastIndexOf('-')` parser, the scope was
      // only the trailing 12 hex chars of the UUID, so the per-user prefs
      // written under the legacy `currentUserUUID` (which used the FULL
      // UUID as the prefix) would not be picked up after migration.
      final s = await StorageService.getInstance();
      const uuid = 'aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee';

      // Pre-seed the legacy per-user-scoped order under the full UUID.
      await s.prefs.setString('user_${uuid}_library_order', json.encode(['legacy']));

      await s.setActiveProfileId('plex-home-plex.abc-def-123-$uuid');
      expect(s.getLibraryOrder(), ['legacy']);
    });
  });

  // ============================================================
  // Library filters / sort / grouping / tab
  // ============================================================

  group('Library filters / sort / grouping / tab', () {
    test('global filters round-trip', () async {
      final s = await StorageService.getInstance();
      expect(s.getLibraryFilters(), isEmpty);
      await s.saveLibraryFilters({'genre': 'sci-fi', 'year': '2024'});
      expect(s.getLibraryFilters(), {'genre': 'sci-fi', 'year': '2024'});
    });

    test('per-section filters fall back to global when missing', () async {
      final s = await StorageService.getInstance();
      await s.saveLibraryFilters({'global': 'true'});
      expect(s.getLibraryFilters(sectionId: 'sec-1'), {'global': 'true'});

      await s.saveLibraryFilters({'genre': 'horror'}, sectionId: 'sec-1');
      expect(s.getLibraryFilters(sectionId: 'sec-1'), {'genre': 'horror'});
      expect(s.getLibraryFilters(), {'global': 'true'});
    });

    test('legacy per-section filters migrate once into scoped key', () async {
      final s = await StorageService.getInstance();
      await s.prefs.setString('library_filters_sec-1', json.encode({'genre': 'drama'}));

      await s.setActiveProfileId('local-user-1');
      expect(s.getLibraryFilters(sectionId: 'sec-1'), {'genre': 'drama'});
      expect(s.prefs.getString('user_local-user-1_library_filters_sec-1'), json.encode({'genre': 'drama'}));
      expect(s.prefs.getString('library_filters_sec-1'), isNull);

      await s.setActiveProfileId('local-user-2');
      expect(s.getLibraryFilters(sectionId: 'sec-1'), isEmpty);
    });

    test('library sort round-trips with descending flag', () async {
      final s = await StorageService.getInstance();
      await s.saveLibrarySort('sec-1', 'titleSort', descending: true);
      expect(s.getLibrarySort('sec-1'), {'key': 'titleSort', 'descending': true});

      await s.saveLibrarySort('sec-1', 'addedAt');
      expect(s.getLibrarySort('sec-1'), {'key': 'addedAt', 'descending': false});
    });

    test('library sort: legacy plain-string value migrates to map shape', () async {
      final s = await StorageService.getInstance();
      // Pre-existing legacy plain string under the unscoped key.
      await s.prefs.setString('library_sort_sec-1', 'titleSort');
      // _readJsonMap with legacyStringOk=true should normalize to the map shape.
      final result = s.getLibrarySort('sec-1');
      expect(result, {'key': 'titleSort', 'descending': false});
    });

    test('library grouping round-trips', () async {
      final s = await StorageService.getInstance();
      expect(s.getLibraryGrouping('sec-1'), isNull);
      await s.saveLibraryGrouping('sec-1', 'shows');
      expect(s.getLibraryGrouping('sec-1'), 'shows');
    });

    test('library tab round-trips', () async {
      final s = await StorageService.getInstance();
      expect(s.getLibraryTab('sec-1'), isNull);
      await s.saveLibraryTab('sec-1', 'recommended');
      expect(s.getLibraryTab('sec-1'), 'recommended');
    });

    test('saveSelectedLibraryKey + getSelectedLibraryKey round-trip', () async {
      final s = await StorageService.getInstance();
      expect(s.getSelectedLibraryKey(), isNull);
      await s.saveSelectedLibraryKey('lib-key-42');
      expect(s.getSelectedLibraryKey(), 'lib-key-42');
    });
  });

  // ============================================================
  // Current user UUID (legacy slot retained for migration)
  // ============================================================

  group('CurrentUserUUID (legacy migration slot)', () {
    test('clearCurrentUserUUID wipes the slot', () async {
      final s = await StorageService.getInstance();
      await s.prefs.setString('current_user_uuid', 'u-1');
      // ignore: deprecated_member_use_from_same_package
      expect(s.getCurrentUserUUID(), 'u-1');
      await s.clearCurrentUserUUID();
      // ignore: deprecated_member_use_from_same_package
      expect(s.getCurrentUserUUID(), isNull);
    });
  });

  // ============================================================
  // Plex Home user-scope migration (full profile id → home-user uuid)
  // ============================================================

  group('migratePlexHomeUserScopes (onInit)', () {
    const fullId = 'plex-home-plex.e443d57860076fc3-379704d0c6601309';
    const uuid = '379704d0c6601309';

    Future<StorageService> reinitialize(StorageService s) async {
      BaseSharedPreferencesService.resetForTesting();
      return StorageService.getInstance();
    }

    test('moves full-profile-id-scoped keys onto the uuid scope', () async {
      var s = await StorageService.getInstance();
      await s.prefs.setString('user_${fullId}_selected_library_key', 'lib-1');
      await s.prefs.setBool('user_${fullId}_some_flag', true);
      await s.prefs.setStringList('user_${fullId}_hidden_libraries', ['a', 'b']);

      s = await reinitialize(s);

      expect(s.prefs.getString('user_${uuid}_selected_library_key'), 'lib-1');
      expect(s.prefs.getBool('user_${uuid}_some_flag'), isTrue);
      expect(s.prefs.getStringList('user_${uuid}_hidden_libraries'), ['a', 'b']);
      expect(s.prefs.keys.where((k) => k.contains('plex-home-')), isEmpty);
    });

    test('full-id value wins over a stale pre-migration uuid-scoped value', () async {
      var s = await StorageService.getInstance();
      await s.prefs.setString('user_${uuid}_selected_library_key', 'stale');
      await s.prefs.setString('user_${fullId}_selected_library_key', 'fresh');

      s = await reinitialize(s);

      expect(s.prefs.getString('user_${uuid}_selected_library_key'), 'fresh');
    });

    test('leaves local-profile scopes and unparseable plex-home scopes untouched', () async {
      var s = await StorageService.getInstance();
      await s.prefs.setString('user_local-1_selected_library_key', 'keep');
      await s.prefs.setString('user_plex-home-acct-not-a-uuid_key', 'keep-too');

      s = await reinitialize(s);

      expect(s.prefs.getString('user_local-1_selected_library_key'), 'keep');
      expect(s.prefs.getString('user_plex-home-acct-not-a-uuid_key'), 'keep-too');
    });
  });

  // ============================================================
  // clearCredentials
  // ============================================================

  group('clearCredentials', () {
    test('removes credential keys, plex token, and multi-server data', () async {
      final s = await StorageService.getInstance();

      // Seed every legacy slot directly — the runtime setters were removed
      // when we collapsed the legacy/new dual-write.
      await s.prefs.setString('plex_token', 'tok-x');
      await s.prefs.setString('client_identifier', 'client-x');
      await s.prefs.setString('servers_list', '[{"x":1}]');
      await s.prefs.setString('server_order', json.encode(['a']));
      await s.saveServerEndpoint(ServerId('a'), 'http://foo.test');

      // Library prefs: write WITHOUT an active profile id
      // so they land on the legacy unscoped key.
      await s.saveLibraryOrder(['lib-1']);

      // Now seed current_user_uuid — clearCredentials should remove this.
      await s.prefs.setString('current_user_uuid', 'u-x');

      await s.clearCredentials();

      // Credential-bucket keys all gone.
      // ignore: deprecated_member_use_from_same_package
      expect(s.getPlexToken(), isNull);
      expect(s.prefs.getString('client_identifier'), isNull);
      // ignore: deprecated_member_use_from_same_package
      expect(s.getCurrentUserUUID(), isNull);

      // Multi-server data wiped.
      // ignore: deprecated_member_use_from_same_package
      expect(s.getServersListJson(), isNull);
      expect(s.prefs.getString('server_order'), isNull);
      expect(s.getServerEndpoint(ServerId('a')), isNull);

      // Library prefs and unrelated state untouched (no scope active, so
      // the scoped read falls through to the same legacy key it was written to).
      expect(s.getLibraryOrder(), ['lib-1']);
    });
  });

  // ============================================================
  // clearLibraryPreferences (user-scoped)
  // ============================================================

  group('clearLibraryPreferences', () {
    test('clears scoped library keys for current user only', () async {
      final s = await StorageService.getInstance();

      // user-1's library prefs
      await s.setActiveProfileId('local-user-1');
      await s.saveLibraryOrder(['u1-a', 'u1-b']);
      await s.saveSelectedLibraryKey('u1-key');
      await s.saveLibraryFilters({'genre': 'horror'}, sectionId: 'sec-1');
      await s.saveLibrarySort('sec-1', 'titleSort', descending: true);
      await s.saveLibraryGrouping('sec-1', 'shows');
      await s.saveLibraryTab('sec-1', 'tabA');
      await s.saveHiddenLibraries({'h-1'});

      // user-2's library prefs (must not be touched by clearing user-1)
      await s.setActiveProfileId('local-user-2');
      await s.saveLibraryOrder(['u2-a']);
      await s.saveSelectedLibraryKey('u2-key');

      // Clear user-2 first to ensure user-2 keys are gone, then verify user-1's intact.
      await s.clearLibraryPreferences();
      expect(s.getLibraryOrder(), isNull);
      expect(s.getSelectedLibraryKey(), isNull);

      await s.setActiveProfileId('local-user-1');
      expect(s.getLibraryOrder(), ['u1-a', 'u1-b']);
      expect(s.getSelectedLibraryKey(), 'u1-key');
      expect(s.getLibraryFilters(sectionId: 'sec-1'), {'genre': 'horror'});
      expect(s.getLibrarySort('sec-1'), {'key': 'titleSort', 'descending': true});
      expect(s.getLibraryGrouping('sec-1'), 'shows');
      expect(s.getLibraryTab('sec-1'), 'tabA');
      expect(s.getHiddenLibraries(), {'h-1'});

      // Now clear user-1 and confirm everything for that user goes away.
      await s.clearLibraryPreferences();
      expect(s.getLibraryOrder(), isNull);
      expect(s.getSelectedLibraryKey(), isNull);
      expect(s.getLibraryFilters(sectionId: 'sec-1'), isEmpty);
      expect(s.getLibrarySort('sec-1'), isNull);
      expect(s.getLibraryGrouping('sec-1'), isNull);
      expect(s.getLibraryTab('sec-1'), isNull);
      expect(s.getHiddenLibraries(), isEmpty);
    });

    test('clearing scoped prefs also consumes pending legacy values', () async {
      final s = await StorageService.getInstance();
      await s.prefs.setString('library_order', json.encode(['legacy']));
      await s.prefs.setString('library_filters_sec-1', json.encode({'genre': 'drama'}));

      await s.setActiveProfileId('local-user-1');
      await s.clearLibraryPreferences();

      expect(s.getLibraryOrder(), isNull);
      expect(s.getLibraryFilters(sectionId: 'sec-1'), isEmpty);
      expect(s.prefs.getString('library_order'), isNull);
      expect(s.prefs.getString('library_filters_sec-1'), isNull);
    });

    test('clearLibraryPreferencesForServer clears only the target profile server keys', () async {
      final s = await StorageService.getInstance();
      final serverA = ServerId('srv-a');
      final serverB = ServerId('srv-b');

      await s.setActiveProfileId('local-user-1');
      await s.saveLibraryOrder(['srv-a:movies', 'srv-b:shows']);
      await s.saveSelectedLibraryKey('srv-a:movies');
      await s.saveHiddenLibraries({'srv-a:movies', 'srv-b:shows'});
      await s.saveLibraryFilters({'genre': 'sci-fi'}, sectionId: 'srv-a:movies');
      await s.saveLibraryFilters({'genre': 'drama'}, sectionId: 'srv-b:shows');
      await s.saveLibrarySort('srv-a:movies', 'titleSort');
      await s.saveLibraryGrouping('srv-a:movies', 'movies');
      await s.saveLibraryTab('srv-a:movies', 'recommended');

      await s.setActiveProfileId('local-user-2');
      await s.saveLibraryOrder(['srv-a:movies']);
      await s.saveHiddenLibraries({'srv-a:movies'});

      await s.clearLibraryPreferencesForServer(serverA, profileId: 'local-user-1');

      await s.setActiveProfileId('local-user-1');
      expect(s.getLibraryOrder(), ['srv-b:shows']);
      expect(s.getSelectedLibraryKey(), isNull);
      expect(s.getHiddenLibraries(), {'srv-b:shows'});
      expect(s.getLibraryFilters(sectionId: 'srv-a:movies'), isEmpty);
      expect(s.getLibraryFilters(sectionId: 'srv-b:shows'), {'genre': 'drama'});
      expect(s.getLibrarySort('srv-a:movies'), isNull);
      expect(s.getLibraryGrouping('srv-a:movies'), isNull);
      expect(s.getLibraryTab('srv-a:movies'), isNull);

      await s.setActiveProfileId('local-user-2');
      expect(s.getLibraryOrder(), ['srv-a:movies']);
      expect(s.getHiddenLibraries(), {'srv-a:movies'});

      await s.clearLibraryPreferencesForServer(serverB, profileId: 'local-user-1');
      await s.setActiveProfileId('local-user-1');
      expect(s.getLibraryOrder(), isNull);
      expect(s.getHiddenLibraries(), isEmpty);
    });

    test('clearLibraryPreferencesForServerEverywhere clears server keys from all scopes', () async {
      final s = await StorageService.getInstance();
      final serverA = ServerId('srv-a');

      await s.prefs.setString('library_order', json.encode(['srv-a:legacy', 'srv-b:legacy']));
      await s.prefs.setString('hidden_libraries', json.encode(['srv-a:legacy', 'srv-b:legacy']));
      await s.prefs.setString('selected_library_key', 'srv-a:legacy');
      await s.prefs.setString('library_sort_srv-a:legacy', json.encode({'key': 'titleSort', 'descending': false}));
      await s.prefs.setString('library_grouping_srv-a:legacy', 'movies');

      await s.setActiveProfileId('local-user-1');
      await s.saveLibraryOrder(['srv-a:movies', 'srv-b:shows']);
      await s.saveHiddenLibraries({'srv-a:movies', 'srv-b:shows'});
      await s.saveLibrarySort('srv-a:movies', 'titleSort');

      await s.setActiveProfileId('local-user-2');
      await s.saveLibraryOrder(['srv-a:movies']);
      await s.saveHiddenLibraries({'srv-a:movies'});

      await s.clearLibraryPreferencesForServerEverywhere(serverA);

      expect(s.prefs.getString('library_order'), json.encode(['srv-b:legacy']));
      expect(s.prefs.getString('hidden_libraries'), json.encode(['srv-b:legacy']));
      expect(s.prefs.getString('selected_library_key'), isNull);
      expect(s.prefs.getString('library_sort_srv-a:legacy'), isNull);
      expect(s.prefs.getString('library_grouping_srv-a:legacy'), isNull);

      await s.setActiveProfileId('local-user-1');
      expect(s.getLibraryOrder(), ['srv-b:shows']);
      expect(s.getHiddenLibraries(), {'srv-b:shows'});
      expect(s.getLibrarySort('srv-a:movies'), isNull);

      await s.setActiveProfileId('local-user-2');
      expect(s.getLibraryOrder(), ['srv-b:legacy']);
      expect(s.getHiddenLibraries(), {'srv-b:legacy'});
    });
  });

  // ============================================================
  // clearUserData = clearCredentials + clearLibraryPreferences
  // ============================================================

  group('clearUserData', () {
    test('combines credentials and library-preferences clear', () async {
      final s = await StorageService.getInstance();

      await s.prefs.setString('plex_token', 'tok');
      await s.setActiveProfileId('local-user-1');
      await s.saveLibraryOrder(['lib-a']);
      await s.saveHiddenLibraries({'h-1'});

      await s.clearUserData();

      // ignore: deprecated_member_use_from_same_package
      expect(s.getPlexToken(), isNull);
      // setActiveProfileId is unaffected by clearCredentials, so the prefix
      // is still active — clearLibraryPreferences cleared the scoped values.
      expect(s.getLibraryOrder(), isNull);
      expect(s.getHiddenLibraries(), isEmpty);
    });
  });
}