import 'llm_service.dart';

/// Stub for the real `flutter_gemma` integration.
///
/// Wired up only after OQ-1 (exact model URL + SHA + flutter_gemma API
/// surface) is confirmed in Developer phase. Today this throws
/// `UnimplementedError` from every method — the rest of the system
/// (suggestFrame, ModelLifecycle, Riverpod providers) is built against the
/// `LlmService` abstract above and runs end-to-end with `MockLlmService`.
///
/// When the package is added, replace the bodies with calls into
/// FlutterGemma.init / generateWithFunctionCalling per the package docs.
/// Existing tests + UI hooks remain unchanged.
class GemmaLlmService implements LlmService {
  final String modelPath;

  GemmaLlmService({required this.modelPath});

  bool _loaded = false;

  @override
  bool get isLoaded => _loaded;

  @override
  Future<void> load() async {
    throw UnimplementedError(
      'GemmaLlmService.load: pending OQ-1 (model URL + flutter_gemma).',
    );
  }

  @override
  Future<void> unload() async {
    _loaded = false;
  }

  @override
  Future<Map<String, dynamic>> generateStructured(
    String prompt,
    Map<String, dynamic> schema,
  ) async {
    throw UnimplementedError(
      'GemmaLlmService.generateStructured: pending OQ-1.',
    );
  }
}