import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../core/locale/language_provider.dart';
import '../../shared/models/user.dart';
import 'profile_service.dart';

class ProfileNotifier extends StateNotifier<AsyncValue<User>> {
  final ProfileService _service;
  final void Function(String) _setLanguage;

  ProfileNotifier(this._service, this._setLanguage)
      : super(const AsyncValue.loading()) {
    load();
  }

  Future<void> load() async {
    state = const AsyncValue.loading();
    state = await AsyncValue.guard(() => _service.getProfile());
    _syncLanguage();
  }

  Future<bool> update(UpdateProfileRequest req) async {
    try {
      final updated = await _service.updateProfile(req);
      state = AsyncValue.data(updated);
      _syncLanguage();
      return true;
    } catch (_) {
      return false;
    }
  }

  // Propagates the user's preferred language to the global languageProvider.
  void _syncLanguage() {
    final lang = state.valueOrNull?.preferences['language'] as String?;
    if (lang != null && supportedLanguages.containsKey(lang)) {
      _setLanguage(lang);
    }
  }
}

final profileProvider =
    StateNotifierProvider<ProfileNotifier, AsyncValue<User>>(
  (ref) => ProfileNotifier(
    ref.read(profileServiceProvider),
    (lang) => ref.read(languageProvider.notifier).state = lang,
  ),
);