import 'dart:async';
import 'dart:developer';
import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_displaymode/flutter_displaymode.dart';
import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:fps_widget/fps_widget.dart';
import 'package:provider/provider.dart';
import 'package:remever/common/events/events.dart';
import 'package:remever/common/functions.dart';
import 'package:remever/common/getters.dart';
import 'package:remever/common/mixin/subscriptionable.dart';
import 'package:remever/common/storage.dart';
import 'package:remever/components/notifiers/app_settings.dart';
import 'package:remever/components/listeners/theme_listener.dart';
import 'package:remever/i18n/strings.g.dart';
import 'package:remever/theme/custom_theme.dart';

final Completer<GlobalKey<NavigatorState>> navKeyCompleter =
    Completer<GlobalKey<NavigatorState>>();

class MyApp extends StatefulWidget {
  ///
  /// Основной класс приложения
  ///
  const MyApp({super.key});

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

///
/// Состояние приложения
///
class _MyAppState extends State<MyApp>
    with Subscriptionable<MyApp>, WidgetsBindingObserver {
  ///
  /// Установка максимально фреймрейта
  ///
  Future<void> setOptimalDisplayMode() async {
    if (Platform.isAndroid) {
      try {
        await FlutterDisplayMode.setHighRefreshRate();
      } on PlatformException catch (e) {
        debugPrint('Не удалось установить частоту кадров экрана ${e.code}');
      }
    }
  }

  @override
  void initState() {
    unawaited(setOptimalDisplayMode());

    WidgetsBinding.instance.addObserver(this);

    super.initState();
  }

  @override
  List<StreamSubscription<dynamic>> get subscribe {
    return <StreamSubscription<dynamic>>[
      /// Слушатель событий оповещений
      eventBus.on<NotificationEvent>().listen((NotificationEvent event) {
        log('app -> ${event.text}');
      }),
    ];
  }

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    switch (state) {
      case AppLifecycleState.resumed:
        break;

      case AppLifecycleState.inactive:
      case AppLifecycleState.paused:
      case AppLifecycleState.detached:
      case AppLifecycleState.hidden:

        ///
        /// При сворачивании/закрывании приложения
        /// Компонуем все [Hive] хранилища
        ///
        hiveLang.compact();
        hiveTheme.compact();

        break;
    }
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    SystemChrome.setPreferredOrientations(<DeviceOrientation>[
      DeviceOrientation.portraitUp,
      DeviceOrientation.portraitDown,
    ]);

    return Builder(
      builder: (BuildContext context) {
        return ScreenUtilInit(
          designSize: const Size(380, 812),
          minTextAdapt: true,
          splitScreenMode: true,
          useInheritedMediaQuery: true,
          builder: (_, __) => _buildListeners(),
        );
      },
    );
  }

  ///
  /// Построение слушателей
  ///
  Widget _buildListeners() {
    return ThemeModeListener(
      builder: (BuildContext context, ThemeMode themeMode) {
        return _buildMaterialApp(themeMode);
      },
    );
  }

  ///
  /// Основной построитель приложения
  ///
  Widget _buildMaterialApp(ThemeMode themeMode) {
    return MaterialApp.router(
      title: 'Remever',
      theme: CustomTheme.lightTheme,
      darkTheme: CustomTheme.darkTheme,
      themeMode: themeMode,
      showPerformanceOverlay: false,
      locale: TranslationProvider.of(context).flutterLocale,
      supportedLocales: AppLocaleUtils.supportedLocales,
      localizationsDelegates: GlobalMaterialLocalizations.delegates,
      routerConfig: globalRouter.config(),
      builder: (BuildContext context, Widget? child) {
        return MediaQuery(
          data: MediaQuery.of(
            context,
          ).copyWith(textScaler: TextScaler.noScaling),
          child: ChangeNotifierProvider<AppSettingsNotifier>(
            create: (_) => settingsNotifier,
            builder: (BuildContext context, Widget? nchild) {
              if (nchild != null) return nchild;

              return Consumer<AppSettingsNotifier>(
                // TIP: должно убрать мерцание
                key: const Key('consumer AppSettingsNotifier'),
                child: child,
                builder: (
                  BuildContext context,
                  AppSettingsNotifier value,
                  Widget? nchild,
                ) {
                  final Widget result = nchild ?? const SizedBox();

                  if (value.showFps) {
                    return Material(
                      child: FPSWidget(
                        alignment: Alignment.centerLeft,
                        child: result,
                      ),
                    );
                  }

                  return result;
                },
              );
            },
          ),
        );
      },
    );
  }
}