import 'package:flutter/material.dart';
import 'package:flutter_web_plugins/flutter_web_plugins.dart';
import 'package:provider/provider.dart';
import 'package:qpay/auth_state.dart';
import 'package:qpay/routes.dart';
import 'package:qpay/screens/transaction_controller.dart';
import 'package:qpay/screens/onboarding/onboarding_controller.dart';
import 'package:qpay/theme/app_theme.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'package:firebase_core/firebase_core.dart';
import 'firebase_options.dart';

const String testEnv = 'assets/.env.test';
const String liveEnv = 'assets/.env.live';
const String appEnv = String.fromEnvironment('APP_ENV', defaultValue: 'test');

String resolveEnvFile(String env) {
  switch (env.toLowerCase()) {
    case 'live':
      return liveEnv;
    case 'test':
    default:
      return testEnv;
  }
}

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  usePathUrlStrategy();
  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);

  await dotenv.load(fileName: resolveEnvFile(appEnv));

  // Read the persisted auth token before the first frame so the router
  // knows whether the user is already signed in on cold start. Without
  // this we would briefly treat logged-in users as guests and bounce
  // them to the sign-in screen until the first refresh kicked in.
  await authState.initialize();

  runApp(
    MultiProvider(
      providers: [
        ChangeNotifierProvider<TransactionController>(
          create: (_) => TransactionController(),
        ),
        ChangeNotifierProvider<OnboardingController>(
          create: (_) => OnboardingController(),
        ),
      ],
      child: const MyApp(),
    ),
  );
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp.router(
      title: 'Velocity',
      theme: AppTheme.lightTheme,
      themeMode: ThemeMode.light,
      debugShowCheckedModeBanner: false,
      routerConfig: buildRouter(),
    );
  }
}