import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:marianum_mobile/data/accountModel.dart';
import 'package:marianum_mobile/data/incommingPackets/authenticatePacket.dart';
import 'package:marianum_mobile/data/incommingPackets/errorPacket.dart';
import 'package:marianum_mobile/data/incommingPackets/fileListPacket.dart';
import 'package:marianum_mobile/data/incommingPackets/talkChatPacket.dart';
import 'package:marianum_mobile/data/incommingPackets/talkNotificationsPacket.dart';
import 'package:marianum_mobile/screen/login/login.dart';
import 'package:marianum_mobile/screen/pages/timetable/timetable.dart';
import 'package:marianum_mobile/widget/loadingSpinner.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:web_socket_channel/web_socket_channel.dart';

import 'app.dart';
import 'data/incommingPackets/serverInfoPacket.dart';
import 'data/incommingPackets/talkContactsPacket.dart';
import 'data/incommingPackets/timetablePacket.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  ByteData data = await PlatformAssetBundle().load('assets/ca/lets-encrypt-r3.pem');
  SecurityContext.defaultContext.setTrustedCertificatesBytes(data.buffer.asUint8List());

  AuthenticatePacket();

  runApp(
      MultiProvider(
        providers: [
          ChangeNotifierProvider(create: (context) => AccountModel()),
          ChangeNotifierProvider(create: (context) => ErrorPacket()),
          ChangeNotifierProvider(create: (context) => ServerInfoPacket()),
          ChangeNotifierProvider(create: (context) => TalkContactsPaket()),
          ChangeNotifierProvider(create: (context) => TalkNotificationsPacket()),
          ChangeNotifierProvider(create: (context) => FileListPacket()),
          ChangeNotifierProvider(create: (context) => TalkChatPacket()),
          ChangeNotifierProvider(create: (context) => TimetablePacket()),
        ],
        child: const Main(),
      )
  );
}

class Main extends StatefulWidget {
  const Main({Key? key}) : super(key: key);

  @override
  State<Main> createState() => _MainState();
}

class _MainState extends State<Main> {
  static const Color red = Color.fromARGB(255, 153, 51, 51);

  final Future<SharedPreferences> _storage = SharedPreferences.getInstance();

  @override
  void initState() {
    super.initState();
    _storage.then((SharedPreferences preferences) => preferences.getBool("loggedIn") ?? false).then((value) => {
      if(value) {
        Provider.of<AccountModel>(context, listen: false).login()
      } else {
        Provider.of<AccountModel>(context, listen: false).logout()
      }
    });

  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,

      title: 'Marianum Fulda',
      theme: ThemeData(
        brightness: Brightness.light,
        primaryColor: red,
        appBarTheme: const AppBarTheme(
          backgroundColor: red,
        ),
        progressIndicatorTheme: const ProgressIndicatorThemeData(
          color: red,
        ),
      ),

      home: FutureBuilder<SharedPreferences>(
        future: _storage,
        builder: (BuildContext context, AsyncSnapshot<SharedPreferences> snapshot) {

          if(snapshot.hasData) {

            return Consumer2<AccountModel, ErrorPacket>(
              builder: (context, accountModel, errorPacket, child) {
                if(errorPacket.errorDismissed) {
                  return accountModel.isLoggedIn ? const App() : const Login();
                } else {
                  return AlertDialog(title: const Text("Serverseitige Fehlermeldung"), content: Text(errorPacket.errorText), actions: [
                    TextButton(onPressed: () {
                      Provider.of<ErrorPacket>(context, listen: false).errorDismissed = true;
                    }, child: const Text("Weiter"))
                  ]);
                }
              },
            );

          } else {

            return const LoadingSpinner();

          }

        },
      )

    );
  }
}