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

import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:flutter_local_notifications/flutter_local_notifications.dart';
import 'package:in_app_purchase/in_app_purchase.dart';
import 'package:provider/provider.dart';
import 'package:simplecloudnotifier/main_messaging.dart';
import 'package:simplecloudnotifier/main_utils.dart';
import 'package:simplecloudnotifier/components/layout/nav_layout.dart';
import 'package:simplecloudnotifier/state/app_settings.dart';
import 'package:simplecloudnotifier/state/app_bar_state.dart';
import 'package:simplecloudnotifier/state/app_theme.dart';
import 'package:simplecloudnotifier/state/application_log.dart';
import 'package:simplecloudnotifier/state/globals.dart';
import 'package:simplecloudnotifier/state/app_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:simplecloudnotifier/utils/navi.dart';
import 'package:toastification/toastification.dart';
import 'firebase_options.dart';

void main() async {
  print('[INIT] Application starting...');

  print('[INIT] Ensure WidgetsFlutterBinding...');

  WidgetsFlutterBinding.ensureInitialized();

  print('[INIT] Init Globals...');
  await Globals().init();

  print('[INIT] Init Hive...');
  await initHive();

  print('[INIT] Register Hive-Adapters');
  await registerHiveAdapter();

  print('[INIT] Open Hive-Boxes');
  await openHiveBoxes(true);

  print('[INIT] Load AppAuth...');

  final appAuth = AppAuth(); // ensure UserAccount is loaded

  if (appAuth.isAuth()) {
    // load user+client in background
    () async {
      try {
        await appAuth.loadUser();
      } catch (exc, trace) {
        ApplicationLog.error('Failed to load user (background load on startup): ' + exc.toString(), trace: trace);
        ApplicationLog.writeRawFailure('Failed to load user (background load on startup)', {'error': exc.toString(), 'trace': trace});
      }
      try {
        await appAuth.loadClient();
      } catch (exc, trace) {
        ApplicationLog.error('Failed to load user (background load on startup): ' + exc.toString(), trace: trace);
        ApplicationLog.writeRawFailure('Failed to load user (background load on startup)', {'error': exc.toString(), 'trace': trace});
      }
    }();
  }

  if (!Platform.isLinux) {
    print('[INIT] Init Firebase...');
    await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);

    print('[INIT] Request Notification permissions...');
    await FirebaseMessaging.instance.requestPermission(provisional: true);

    FirebaseMessaging.instance.onTokenRefresh.listen((fcmToken) {
      try {
        setFirebaseToken(fcmToken);
      } catch (exc, trace) {
        ApplicationLog.error('Failed to set firebase token: ' + exc.toString(), trace: trace);
      }
    }).onError((dynamic err) {
      ApplicationLog.error('Failed to listen to token refresh events: ' + (err?.toString() ?? ''));
    });

    try {
      print('[INIT] Query firebase token...');
      final fcmToken = await FirebaseMessaging.instance.getToken();
      if (fcmToken != null) {
        setFirebaseToken(fcmToken);
      }
    } catch (exc, trace) {
      ApplicationLog.error('Failed to get+set firebase token: ' + exc.toString(), trace: trace);
    }

    FirebaseMessaging.onBackgroundMessage(onBackgroundMessage);
    FirebaseMessaging.onMessage.listen(onForegroundMessage);
  } else {
    print('[INIT] Skip Firebase init (Platform == Linux)...');
  }

  await appAuth.tryMigrateFromV1();

  print('[INIT] Load Notifications...');

  final flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin();
  final flutterLocalNotificationsPluginImpl = flutterLocalNotificationsPlugin.resolvePlatformSpecificImplementation<AndroidFlutterLocalNotificationsPlugin>();
  if (flutterLocalNotificationsPluginImpl == null) {
    ApplicationLog.error('Failed to get AndroidFlutterLocalNotificationsPlugin', trace: StackTrace.current);
  } else {
    flutterLocalNotificationsPluginImpl.requestNotificationsPermission();

    final initializationSettingsAndroid = AndroidInitializationSettings('ic_notification_white');
    final initializationSettingsDarwin = DarwinInitializationSettings(
      requestAlertPermission: true,
      requestBadgePermission: true,
      requestSoundPermission: true,
      onDidReceiveLocalNotification: receiveLocalDarwinNotification,
      notificationCategories: getDarwinNotificationCategories(),
    );
    final initializationSettingsLinux = LinuxInitializationSettings(defaultActionName: 'Open notification');
    final initializationSettings = InitializationSettings(
      android: initializationSettingsAndroid,
      iOS: initializationSettingsDarwin,
      linux: initializationSettingsLinux,
    );
    flutterLocalNotificationsPlugin.initialize(
      initializationSettings,
      onDidReceiveNotificationResponse: receiveLocalNotification,
      onDidReceiveBackgroundNotificationResponse: notificationTapBackground,
    );

    final appLaunchNotification = await flutterLocalNotificationsPlugin.getNotificationAppLaunchDetails();
    if (appLaunchNotification != null) {
      // Use has launched SCN by clicking on a local notifiaction, if it was a summary or message notifiaction open the corresponding screen
      // This is android only
      //TODO same on iOS, somehow??
      ApplicationLog.info('App launched by notification: ${appLaunchNotification.notificationResponse?.id}');

      handleNotificationClickAction(appLaunchNotification.notificationResponse?.payload, Duration(milliseconds: 600));
    }
  }

  ApplicationLog.debug('[INIT] Application started');

  Globals().appWidgetInitialized = true;

  runApp(
    MultiProvider(
      providers: [
        ChangeNotifierProvider(create: (context) => AppAuth(), lazy: false),
        ChangeNotifierProvider(create: (context) => AppTheme(), lazy: false),
        ChangeNotifierProvider(create: (context) => AppBarState(), lazy: false),
        ChangeNotifierProvider(create: (context) => AppSettings(), lazy: false),
      ],
      child: SCNApp(),
    ),
  );
}

class SCNApp extends StatefulWidget {
  SCNApp({super.key});

  static var materialKey = GlobalKey<NavigatorState>();

  @override
  State<SCNApp> createState() => _SCNAppState();
}

class _SCNAppState extends State<SCNApp> {
  StreamSubscription<List<PurchaseDetails>>? _purchaseSubscription;

  @override
  void initState() {
    if (Globals().clientType == 'IOS' || Globals().clientType == 'ANDROID') {
      _purchaseSubscription = InAppPurchase.instance.purchaseStream.listen(
        purchaseUpdated,
        onDone: () => _purchaseSubscription?.cancel(),
        onError: purchaseError,
      );
    }
    super.initState();
  }

  @override
  void dispose() {
    _purchaseSubscription?.cancel();
    _purchaseSubscription = null;
    super.dispose();
  }

  void purchaseUpdated(List<PurchaseDetails> purchaseDetailsList) {
    // see https://pub.dev/packages/in_app_purchase

    for (var purchaseDetails in purchaseDetailsList) {
      ApplicationLog.debug('Purchase ${purchaseDetails.productID} is ${purchaseDetails.status.toString()}'); //TODO
    }
  }

  void purchaseError(dynamic error) {
    // TODO handle error here.
    ApplicationLog.error('Purchase error: ${error.toString()}', trace: StackTrace.current);
  }

  @override
  Widget build(BuildContext context) {
    return ToastificationWrapper(
      config: ToastificationConfig(
        itemWidth: 440,
        marginBuilder: (context, alignment) => EdgeInsets.symmetric(vertical: 64),
        animationDuration: Duration(milliseconds: 200),
      ),
      child: Consumer<AppTheme>(
        builder: (context, appTheme, child) => MaterialApp(
          navigatorKey: SCNApp.materialKey,
          title: 'SimpleCloudNotifier',
          navigatorObservers: [Navi.routeObserver, Navi.modalRouteObserver],
          theme: ThemeData(
            colorScheme: ColorScheme.fromSeed(
              seedColor: appTheme.color.value,
              brightness: appTheme.darkMode ? Brightness.dark : Brightness.light,
            ),
            useMaterial3: true,
          ),
          home: SCNNavLayout(),
        ),
      ),
    );
  }
}