import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:flutter/scheduler.dart';
import 'package:flutter/services.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import 'package:overlay_support/overlay_support.dart';

import '/database/models/my_profile.dart';
import '/views/main/home.dart';
import '/views/authentication/unauthenticated_landing.dart';
import '/views/authentication/login.dart';
import '/views/authentication/signup.dart';

class PushNotification {
  PushNotification({
    this.title,
    this.body,
    this.dataTitle,
    this.dataBody,
  });

  String? title;
  String? body;
  String? dataTitle;
  String? dataBody;
}

void main() async {
  await dotenv.load(fileName: '.env');

  // TODO: Replace this with the prod url when server is deployed
  MyProfile.setServerUrl(dotenv.env['SERVER_URL'] ?? 'http://localhost:8080/');

  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  MyApp({Key? key}) : super(key: key);

  static const String _title = 'Envelope';

  late final FirebaseMessaging _messaging;

  void registerNotification() async {
    await Firebase.initializeApp();

    _messaging = FirebaseMessaging.instance;

    NotificationSettings settings = await _messaging.requestPermission(
      alert: true,
      badge: true,
      provisional: false,
      sound: true,
    );

    if (settings.authorizationStatus != AuthorizationStatus.authorized) {
      return;
    }

    final fcmToken = await _messaging.getToken();
    print('Device Token: $fcmToken');

    Color notificationBg = Colors.grey.shade100;
    if (SchedulerBinding.instance.window.platformBrightness == Brightness.dark) {
      notificationBg = Colors.grey[850]!;
    }

    // For handling the received notifications
    FirebaseMessaging.onMessage.listen((RemoteMessage message) {
      // Parse the message received
      PushNotification notification = PushNotification(
        title: message.notification?.title,
        body: message.notification?.body,
      );

      // TODO: Replace this with a better notification UI
      showSimpleNotification(
          Text(notification.title!),
          // leading: NotificationBadge(totalNotifications: _totalNotifications),
          background: notificationBg,
          duration: const Duration(seconds: 5),
          slideDismissDirection: DismissDirection.up,
        );
    });
  }

  @override
  Widget build(BuildContext context) {

    registerNotification();

    return OverlaySupport.global(
     child: MaterialApp(
        title: _title,
        routes: {
          '/home': (context) => const Home(),
          '/landing': (context) => const UnauthenticatedLandingWidget(),
          '/login': (context) => const Login(),
          '/signup': (context) => const Signup(),
        },
        home: const Scaffold(
          body: SafeArea(
            child: Home(),
          )
        ),
        theme: ThemeData(
          brightness: Brightness.light,
          primaryColor: const Color(0xff014bff),
          backgroundColor: Colors.grey[300],
          scaffoldBackgroundColor: Colors.grey.shade100,
          disabledColor: Colors.grey[700],
          hintColor: Colors.grey.shade700,

          colorScheme: ColorScheme(
            brightness: Brightness.light,
            primary: const Color(0xff014bff),
            onPrimary: Colors.white,
            secondary: const Color(0xff1a6dff),
            onSecondary: Colors.black,
            tertiary: const Color(0xff3490ff),
            onTertiary: Colors.black,
            error: Colors.red,
            onError: Colors.white,
            background: Colors.grey.shade300,
            onBackground: Colors.black,
            surface: Colors.grey.shade100,
            onSurface: Colors.black,
          ),

          appBarTheme: AppBarTheme(
            color: Colors.grey.shade100,
            foregroundColor: Colors.white,
            iconTheme: const IconThemeData(
              color: Colors.black,
            ),
            toolbarTextStyle: const TextStyle(
              color: Colors.black,
            ),

            systemOverlayStyle: const SystemUiOverlayStyle(
              statusBarColor: Colors.black,

              statusBarIconBrightness: Brightness.light,
              statusBarBrightness: Brightness.light,
            )
          ),

          iconTheme: const IconThemeData(color: Colors.black),

          inputDecorationTheme: InputDecorationTheme(
            filled: true,
            fillColor: Colors.white,
            labelStyle: const TextStyle(
              color: Colors.black,
              fontSize: 30,
            ),
            hintStyle: TextStyle(
              color: Colors.grey.shade600,
            ),
            iconColor: Colors.grey.shade500,
            contentPadding: const EdgeInsets.all(8),
            enabledBorder: OutlineInputBorder(
              borderRadius: BorderRadius.circular(15),
              borderSide: const BorderSide(
                  color: Colors.transparent,
              )
            ),
            focusedBorder: OutlineInputBorder(
              borderRadius: BorderRadius.circular(15),
              borderSide: const BorderSide(
                color: Colors.transparent,
              )
            ),
          ),
        ),
        darkTheme: ThemeData(
          brightness: Brightness.dark,
          primaryColor: const Color(0xffff4a27),
          backgroundColor: Colors.grey.shade800,
          scaffoldBackgroundColor: Colors.grey[850],
          disabledColor: Colors.grey[400],
          hintColor: Colors.grey.shade400,

          colorScheme: ColorScheme(
            brightness: Brightness.dark,
            primary: const Color(0xffff4a27),
            onPrimary: Colors.white,
            secondary: const Color(0xffff5f3a),
            onSecondary: Colors.white,
            tertiary: const Color(0xffff7950),
            onTertiary: Colors.black,
            error: Colors.red,
            onError: Colors.white,
            background: Colors.grey.shade900,
            onBackground: Colors.white,
            surface: Colors.grey.shade700,
            onSurface: Colors.white,
        ),

        appBarTheme: AppBarTheme(
          color: Colors.grey.shade800,
          iconTheme: IconThemeData(
            color: Colors.grey.shade400
          ),
          toolbarTextStyle: TextStyle(
            color: Colors.grey.shade400
          ),
          systemOverlayStyle: const SystemUiOverlayStyle(
            statusBarColor: Colors.black,

            statusBarIconBrightness: Brightness.dark,
            statusBarBrightness: Brightness.dark,
          )
        ),

        iconTheme: const IconThemeData(color: Colors.white),

        inputDecorationTheme: InputDecorationTheme(
          filled: true,
          fillColor: Colors.grey.shade800,
          hintStyle: TextStyle(
            color: Colors.grey.shade500,
          ),
          iconColor: Colors.grey.shade500,
          contentPadding: const EdgeInsets.all(8),
          enabledBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(15),
            borderSide: const BorderSide(
              color: Colors.transparent,
            )
          ),
          focusedBorder: OutlineInputBorder(
            borderRadius: BorderRadius.circular(15),
            borderSide: const BorderSide(
              color: Colors.transparent,
            )
          ),
        ),
      ),
      ),
    );
  }
}