import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

import 'core/api_client.dart';
import 'core/api_service.dart';
import 'core/auth_service.dart';
import 'screens/home_screen.dart';
import 'screens/login_screen.dart';

void main() {
  runApp(const App());
}

class App extends StatelessWidget {
  const App({super.key});

  @override
  Widget build(BuildContext context) {
    final apiClient = ApiClient();

    return MultiProvider(
      providers: [
        Provider<ApiClient>.value(value: apiClient),
        Provider<ApiService>(create: (_) => ApiService(apiClient)),
        ChangeNotifierProvider<AuthService>(
          create: (_) => AuthService(apiClient)..restoreSession(),
        ),
      ],
      child: MaterialApp(
        title: 'Домашняя автоматизация',
        theme: ThemeData(colorScheme: ColorScheme.fromSeed(seedColor: Colors.teal)),
        home: const AuthGate(),
      ),
    );
  }
}

/// Swaps between login and the app shell based on session state, so nothing
/// else in the tree needs to know how auth is restored or persisted.
class AuthGate extends StatelessWidget {
  const AuthGate({super.key});

  @override
  Widget build(BuildContext context) {
    final auth = context.watch<AuthService>();

    if (auth.isLoading) {
      return const Scaffold(body: Center(child: CircularProgressIndicator()));
    }

    return auth.isAuthenticated ? const HomeScreen() : const LoginScreen();
  }
}