import 'package:flutter/material.dart';
import 'package:flutter_native_splash/flutter_native_splash.dart';
import 'package:flutter_rx_bloc/flutter_rx_bloc.dart';
import 'package:harbour/src/harbour.dart';
import 'package:provider/provider.dart';
import 'package:rxdart/rxdart.dart';

class HarbourApp extends StatefulWidget {
  const HarbourApp({
    super.key,
  });

  @override
  State<HarbourApp> createState() => _HarbourAppState();
}

// ignore: prefer_mixin
class _HarbourAppState extends State<HarbourApp> with WidgetsBindingObserver {
  final _navigatorKey = GlobalKey<NavigatorState>();
  NextcloudTheme? _userTheme;

  final _platformBrightness = BehaviorSubject<Brightness>.seeded(
    WidgetsBinding.instance.window.platformBrightness,
  );

  @override
  void didChangePlatformBrightness() {
    _platformBrightness.add(WidgetsBinding.instance.window.platformBrightness);

    super.didChangePlatformBrightness();
  }

  @override
  void initState() {
    super.initState();

    WidgetsBinding.instance.addObserver(this);

    WidgetsBinding.instance.addPostFrameCallback((final _) {
      RxBlocProvider.of<AccountsBloc>(context).activeAccount.listen((final activeAccount) async {
        FlutterNativeSplash.remove();

        if (activeAccount == null) {
          await _navigatorKey.currentState!.pushAndRemoveUntil(
            MaterialPageRoute(
              builder: (final context) => const LoginPage(),
            ),
            (final _) => false,
          );
        } else {
          await _navigatorKey.currentState!.pushAndRemoveUntil(
            MaterialPageRoute(
              builder: (final context) => HomePage(
                account: activeAccount,
                onThemeChanged: (final theme) {
                  setState(() {
                    _userTheme = theme;
                  });
                },
              ),
            ),
            (final _) => false,
          );
        }
      });
    });
  }

  @override
  void dispose() {
    WidgetsBinding.instance.removeObserver(this);
    // ignore: discarded_futures
    _platformBrightness.close();

    super.dispose();
  }

  @override
  Widget build(final BuildContext context) {
    final globalOptions = Provider.of<GlobalOptions>(context);
    return StreamBuilder<Brightness>(
      stream: _platformBrightness,
      builder: (final context, final platformBrightnessSnapshot) => StreamBuilder<ThemeMode>(
        stream: globalOptions.themeMode.stream,
        builder: (final context, final themeModeSnapshot) => StreamBuilder<bool>(
          stream: globalOptions.themeOLEDAsDark.stream,
          builder: (final context, final themeOLEDAsDarkSnapshot) {
            if (!platformBrightnessSnapshot.hasData || !themeOLEDAsDarkSnapshot.hasData || !themeModeSnapshot.hasData) {
              return Container();
            }
            return MaterialApp(
              localizationsDelegates: AppLocalizations.localizationsDelegates,
              supportedLocales: AppLocalizations.supportedLocales,
              navigatorKey: _navigatorKey,
              debugShowCheckedModeBanner: false,
              theme: getThemeFromNextcloudTheme(
                _userTheme,
                themeModeSnapshot.data!,
                platformBrightnessSnapshot.data!,
                oledAsDark: themeOLEDAsDarkSnapshot.data!,
              ),
              home: Container(),
            );
          },
        ),
      ),
    );
  }
}