import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_localizations/flutter_localizations.dart';

import 'objectbox.dart';
import 'package:wakelock/wakelock.dart';
import 'package:event_bus_plus/event_bus_plus.dart';

import 'package:mobdr/service/logger_util.dart';
import 'package:mobdr/config/constant.dart';
import 'package:mobdr/cubit/language/language_cubit.dart';
import 'package:mobdr/cubit/language/app_localizations.dart';
import 'package:mobdr/cubit/language/initial_language.dart';
import 'package:mobdr/service/shared_prefs.dart';
import 'package:mobdr/ui/splash_screen.dart';
import 'package:mobdr/service/device_info.dart';
import 'package:mobdr/service/package_info.dart';
import 'package:mobdr/service/directories.dart';
import 'package:mobdr/service/plausible.dart';

/// Provides access to the ObjectBox Store throughout the app.
late ObjectBox objectbox;

final EventBus eventBus = EventBus();

String getCurrentTimeZone(DateTime dateTime) {
  Duration offset = dateTime.timeZoneOffset;
  int offsetHours = offset.inHours;
  int offsetMinutes = offset.inMinutes.remainder(60);

  String offsetSign = offset.isNegative ? '-' : '+';
  String timeZone =
      '$offsetSign${offsetHours.abs().toString().padLeft(2, '0')}:${offsetMinutes.abs().toString().padLeft(2, '0')}';

  return timeZone;
}

Future<void> main() async {
  // This is required so ObjectBox can get the application directory
  // to store the database in.
  WidgetsFlutterBinding.ensureInitialized();

  // registration of the observer
  WidgetsBinding.instance.addObserver(MyApp());

  LoggerUtil.logNStackInfo('Application MobDR started');

  // create database object
  objectbox = await ObjectBox.create();

  // initialize shared preferences
  await SharedPrefs().init();

  // get/set device informations
  await device_info_plus().initPlatformState();

  // get/set device informations
  await package_info_plus().initPackageInfo();

  // set device screenWidth/height
  SharedPrefs().screenWidth =
      PlatformDispatcher.instance.views.first.physicalSize.width;
  SharedPrefs().screenHeight =
      PlatformDispatcher.instance.views.first.physicalSize.height;

  // initialize directories
  await directories().initDirectories();

  /// initialize tracker plausible analytics
  await PlausibleUtil.initializePlausible();

  // initialize time zone current device
  SharedPrefs().timeZone = getCurrentTimeZone(DateTime.now());

  // url MP4
  SharedPrefs().urlMP4 =
      'https://mp4.ikksgroup.com/MobilePortal4/index.html#ajax/dashboard.html';

  // track MobBR
  LoggerUtil.dblog(
      'LOG', 'MOBDR', 'Démarrage MobDR ' + SharedPrefs().appVersion, 0);

  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp])
      .then((_) {
    /// pour wakelock
    WidgetsFlutterBinding.ensureInitialized();
    Wakelock.enable();

    eventBus.on().listen((event) {
      if (!(event is EmptyEvent)) {
        LoggerUtil.logNStackInfo('${DateTime.now()} Event: $event');
      }
    });

    runApp(MyApp());
  });
}

class MyCustomScrollBehavior extends MaterialScrollBehavior {
  // Override behavior methods and getters like dragDevices
  @override
  Set<PointerDeviceKind> get dragDevices => {
        PointerDeviceKind.touch,
        PointerDeviceKind.mouse,
        // etc.
      };
}

class MyApp extends StatelessWidget with WidgetsBindingObserver {
  @override
  void didChangeAppLifecycleState(AppLifecycleState state) async {
    if (state == AppLifecycleState.paused) {
      LoggerUtil.logNStackInfo("The application is paused");
    } else if (state == AppLifecycleState.resumed) {
      LoggerUtil.logNStackInfo("The application is resumed");

      // check if plausible is up and running
      await PlausibleUtil.checkPlausibleUp();
    } else if (state == AppLifecycleState.inactive) {
      LoggerUtil.logNStackInfo("The application is inactive");
    } else if (state == AppLifecycleState.detached) {
      LoggerUtil.logNStackInfo("The application is detached");
      eventBus.dispose();
    }

    if (state == AppLifecycleState.resumed) {
    } else if (state == AppLifecycleState.inactive) {
      LoggerUtil.logNStackInfo("The application runs in the background");
    }
  }

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    // Initialize all bloc provider used on this entire application here
    return MultiBlocProvider(
      providers: [
        // this bloc used for feature - change language
        BlocProvider<LanguageCubit>(
          create: (BuildContext context) => LanguageCubit(),
        ),
      ],
      // if you want to change default language, go to lib/ui/feature/multi_language/initial_language.dart and change en US to your default language
      child: InitialLanguage(
        child: BlocBuilder<LanguageCubit, LanguageState>(
            builder: (context, state) {
          return MaterialApp(
            scrollBehavior: MyCustomScrollBehavior(),
            title: APP_NAME,
            debugShowCheckedModeBanner: false,
            theme: ThemeData(
              visualDensity: VisualDensity.adaptivePlatformDensity,
              pageTransitionsTheme: PageTransitionsTheme(builders: {
                /*
                  Below is the example to change MaterialPageRoute default transition in iOS and Android :
                   FadeUpwardsPageTransitionsBuilder() <= Default MaterialPageRoute Transition
                   OpenUpwardsPageTransitionsBuilder()
                   ZoomPageTransitionsBuilder()
                   CupertinoPageTransitionsBuilder()
                  */
                TargetPlatform.iOS: CupertinoPageTransitionsBuilder(),
                TargetPlatform.android: ZoomPageTransitionsBuilder(),
              }),
            ),
            // below is used for language feature
            supportedLocales: [
              Locale('fr', 'FR'),
              Locale('en', 'US'),
              Locale('id', 'ID'),
              Locale('ar', 'DZ'),
              Locale('zh', 'HK'),
              Locale('hi', 'IN'),
              Locale('th', 'TH'),
              Locale('tk', 'TK'),
            ],
            // These delegates make sure that the localization data for the proper language is loaded
            localizationsDelegates: [
              AppLocalizationsDelegate(),
              GlobalMaterialLocalizations.delegate,
              GlobalCupertinoLocalizations.delegate,
              GlobalWidgetsLocalizations.delegate
            ],
            // Returns a locale which will be used by the app
            locale: (state is ChangeLanguageSuccess)
                ? state.locale
                : Locale('fr', 'FR'),
            home: SplashScreenPage(),
          );
        }),
      ),
    );
  }
}