import 'package:flutter/foundation.dart';
import '../models/user.dart';
import '../services/api_client.dart';
import '../services/auth_service.dart';
import '../services/voice_service.dart';
import '../services/push_notification_service.dart';
import '../services/sse_service.dart';

enum AuthState { unauthenticated, authenticating, authenticated }

class AuthProvider extends ChangeNotifier {
  final ApiClient _apiClient;
  late AuthService _authService;
  late VoiceService _voiceService;
  late PushNotificationService _pushService;
  late SseService _sseService;

  AuthState _state = AuthState.unauthenticated;
  User? _user;
  String? _error;

  AuthState get state => _state;
  User? get user => _user;
  String? get error => _error;
  VoiceService get voiceService => _voiceService;
  SseService get sseService => _sseService;
  ApiClient get apiClient => _apiClient;

  AuthProvider(this._apiClient) {
    _authService = AuthService(_apiClient);
    _voiceService = VoiceService(_apiClient);
    _pushService = PushNotificationService(_apiClient);
    _sseService = SseService(_apiClient);

    _apiClient.onForceLogout = _handleForceLogout;
  }

  Future<void> tryRestoreSession() async {
    final user = await _authService.tryRestoreSession();
    if (user != null) {
      _user = user;
      _state = AuthState.authenticated;
      await _initializeServices();
      notifyListeners();
    }
  }

  Future<void> login(String serverUrl, String username, String password) async {
    _state = AuthState.authenticating;
    _error = null;
    notifyListeners();

    try {
      _user = await _authService.login(serverUrl, username, password);
      _state = AuthState.authenticated;
      await _initializeServices();
    } catch (e) {
      _state = AuthState.unauthenticated;
      _error = e.toString().replaceFirst('Exception: ', '');
    }
    notifyListeners();
  }

  Future<void> _initializeServices() async {
    try {
      await _pushService.initialize();
    } catch (e) {
      debugPrint('AuthProvider: push service init error: $e');
    }
    try {
      await _voiceService.initialize(deviceToken: _pushService.fcmToken);
    } catch (e) {
      debugPrint('AuthProvider: voice service init error: $e');
    }
    try {
      await _sseService.connect();
    } catch (e) {
      debugPrint('AuthProvider: SSE connect error: $e');
    }
  }

  Future<void> logout() async {
    _voiceService.dispose();
    _sseService.disconnect();
    await _authService.logout();

    _state = AuthState.unauthenticated;
    _user = null;
    _error = null;

    // Re-create services for potential re-login
    _voiceService = VoiceService(_apiClient);
    _pushService = PushNotificationService(_apiClient);
    _sseService = SseService(_apiClient);

    notifyListeners();
  }

  void _handleForceLogout() {
    _voiceService.dispose();
    _sseService.disconnect();

    _state = AuthState.unauthenticated;
    _user = null;
    _error = 'Session expired. Please log in again.';

    // Re-create services for potential re-login
    _voiceService = VoiceService(_apiClient);
    _pushService = PushNotificationService(_apiClient);
    _sseService = SseService(_apiClient);

    notifyListeners();
  }

  @override
  void dispose() {
    _authService.dispose();
    _voiceService.dispose();
    _sseService.dispose();
    super.dispose();
  }
}