import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:get/get.dart';
import 'package:mom_kitchen/src/services/app_service.dart';
import 'package:mom_kitchen/src/services/orientation_service.dart';
import 'package:mom_kitchen/src/pages/home_page.dart';
import 'package:mom_kitchen/src/pages/theme_demo_page.dart';
import 'package:mom_kitchen/src/l10n/app_localizations.dart';
import 'package:mom_kitchen/src/standards/app_pages.dart';
import 'package:mom_kitchen/src/standards/page_validator.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await AppService.instance.init();

  await OrientationService().lockPortrait();

  AppPages.registerAll();

  runApp(const MyApp());
}

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

  @override
  Widget build(BuildContext context) {
    final themeService = AppService.instance.theme;

    return GetMaterialApp(
      title: 'Mom\'s Kitchen',
      localizationsDelegates: AppLocalizations.localizationsDelegates,
      supportedLocales: AppLocalizations.supportedLocales,
      theme: ThemeData(
        useMaterial3: true,
        colorScheme: ColorScheme.fromSeed(
          seedColor: themeService.primaryColor,
          brightness: themeService.isDarkMode
              ? Brightness.dark
              : Brightness.light,
        ),
      ),
      darkTheme: ThemeData(
        useMaterial3: true,
        colorScheme: ColorScheme.fromSeed(
          seedColor: themeService.primaryColor,
          brightness: Brightness.dark,
        ),
      ),
      themeMode: themeService.isDarkMode ? ThemeMode.dark : ThemeMode.light,
      home: const HomePage(),
      getPages: [
        GetPage(
          name: '/',
          page: () {
            AppPages.validateRoute('/');
            return const HomePage();
          },
        ),
        GetPage(
          name: '/theme',
          page: () {
            AppPages.validateRoute('/theme');
            return const ThemeDemoPage();
          },
        ),
      ],
      onGenerateRoute: (settings) {
        AppPages.validateRoute(settings.name ?? '');
        return null;
      },
      navigatorObservers: [PageRoutingObserver()],
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final themeService = AppService.instance.theme;

    return CupertinoPageScaffold(
      navigationBar: CupertinoNavigationBar(
        middle: Text(l10n.appTitle),
        backgroundColor: themeService.backgroundColor.withValues(alpha: 0.95),
      ),
      child: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              l10n.welcomeMessage,
              style: TextStyle(
                fontSize: 24,
                fontWeight: FontWeight.bold,
                color: themeService.textColor,
              ),
            ),
            const SizedBox(height: 20),
            Text(
              l10n.appDescription,
              style: TextStyle(
                fontSize: 16,
                color: themeService.textColor.withValues(alpha: 0.6),
              ),
            ),
            const SizedBox(height: 40),
            CupertinoButton.filled(
              onPressed: () {
                Get.to(const HomePage());
              },
              child: Text(l10n.getStarted),
            ),
            const SizedBox(height: 20),
            CupertinoButton.filled(
              onPressed: () {
                Get.to(const ThemeDemoPage());
              },
              child: Text(l10n.themeSettings),
            ),
          ],
        ),
      ),
    );
  }
}

class PageRoutingObserver extends NavigatorObserver {
  @override
  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
    super.didPush(route, previousRoute);
    _validateRoute(route.settings.name, previousRoute?.settings.name);
  }

  @override
  void didPop(Route<dynamic> route, Route<dynamic>? previousRoute) {
    super.didPop(route, previousRoute);
    _validateRoute(previousRoute?.settings.name, route.settings.name);
  }

  @override
  void didReplace({Route<dynamic>? newRoute, Route<dynamic>? oldRoute}) {
    super.didReplace(newRoute: newRoute, oldRoute: oldRoute);
    _validateRoute(newRoute?.settings.name, oldRoute?.settings.name);
  }

  void _validateRoute(String? routeName, String? previousRouteName) {
    final currentRoute = routeName ?? previousRouteName;
    if (currentRoute == null || currentRoute.isEmpty) return;

    AppPages.validateRoute(currentRoute);

    if (kDebugMode && navigator?.context != null) {
      WidgetsBinding.instance.addPostFrameCallback((_) {
        PageValidator.validate(navigator!.context, currentRoute);
      });
    }
  }
}