import 'dart:async';
import 'dart:io';
import 'package:Intaleq/app_bindings.dart';
import 'package:Intaleq/controller/functions/crud.dart';
import 'package:Intaleq/views/home/HomePage/contact_us.dart';
import 'package:Intaleq/views/home/HomePage/share_app_page.dart';
import 'package:Intaleq/views/home/my_wallet/passenger_wallet.dart';
import 'package:Intaleq/views/home/profile/passenger_profile_page.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';
import 'package:flutter_stripe/flutter_stripe.dart';
import 'package:get/get.dart';
import 'package:get_storage/get_storage.dart';
import 'package:flutter/services.dart';
import 'package:wakelock_plus/wakelock_plus.dart';
import 'constant/api_key.dart';
import 'constant/info.dart';
import 'controller/local/local_controller.dart';
import 'controller/local/translations.dart';
import 'firebase_options.dart';
import 'models/db_sql.dart';
import 'splash_screen_page.dart';

// -- Global instances for easy access --
final box = GetStorage();
final storage = FlutterSecureStorage();
DbSql sql = DbSql.instance;

// Firebase background message handler must be a top-level function.
@pragma('vm:entry-point')
Future<void> backgroundMessageHandler(RemoteMessage message) async {
  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);
  print("Handling a background message: ${message.messageId}");
}

void main() {
  // Use runZonedGuarded to catch all unhandled exceptions in the app.
  runZonedGuarded<Future<void>>(() async {
    // --- Step 1: Critical initializations before runApp() ---
    // These must complete before the UI can be built.
    WidgetsFlutterBinding.ensureInitialized();
    await GetStorage.init();
    WakelockPlus.enable();
    if (Platform.isAndroid || Platform.isIOS) {
      await Firebase.initializeApp(
          options: DefaultFirebaseOptions.currentPlatform);
      FirebaseMessaging.onBackgroundMessage(backgroundMessageHandler);
    }

    // Stripe key initialization is very fast.
    Stripe.publishableKey = AK.publishableKey;

    // Lock screen orientation.
    await SystemChrome.setPreferredOrientations([
      DeviceOrientation.portraitUp,
      DeviceOrientation.portraitDown,
    ]);
    Get.put(LocaleController());
    // --- Step 2: Run the app immediately ---
    // All heavy initializations are deferred to the SplashScreen.
    runApp(const MyApp());
  }, (error, stack) {
    // Global error handler.
    final s = error.toString();
    final ignored = s.contains('PERMISSION_DENIED') ||
        s.contains('FormatException') ||
        s.contains('Null check operator used on a null value');

    if (!ignored) {
      CRUD.addError(s, stack.toString(), 'main_zone_guard');
    }
  });
}

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

  @override
  Widget build(BuildContext context) {
    // Get.find() is used here because LocaleController is already put in AppBindings.
    final LocaleController localController = Get.find<LocaleController>();

    return GetMaterialApp(
      title: AppInformation.appName,
      translations: MyTranslation(),
      debugShowCheckedModeBanner: false,
      locale: localController.language,
      theme: localController.appTheme,

      // --- [CRITICAL] ---
      // initialBinding tells GetX to run AppBindings once at the start.
      // This sets up all our controllers (put, lazyPut) for the entire app lifecycle.
      initialBinding: AppBindings(),

      initialRoute: '/',
      getPages: [
        GetPage(name: '/', page: () => const SplashScreen()),
        // These routes are used by QuickActions and other navigation events.
        GetPage(name: '/shareApp', page: () => ShareAppPage()),
        GetPage(name: '/wallet', page: () => const PassengerWallet()),
        GetPage(name: '/profile', page: () => PassengerProfilePage()),
        GetPage(name: '/contactSupport', page: () => ContactUsPage()),
      ],
    );
  }
}