Qlyra/lib/main.dart

import 'dart:async';

import 'package:dynamic_color/dynamic_color.dart';
import 'package:flutter/material.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:komet/l10n/app_localizations.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'backend/api.dart';
import 'backend/modules/account.dart';
import 'backend/modules/messages.dart';
import 'core/storage/app_database.dart';
import 'core/storage/token_storage.dart';
import 'core/protocol/packet.dart';
import 'frontend/debug/fps_overlay_layer.dart';
import 'frontend/screens/auth/login_screen.dart';
import 'frontend/screens/chats/chat_list_screen.dart';
import 'frontend/widgets/custom_notification.dart';

final api = Api();
final accountModule = AccountModule(api);
final messagesModule = MessagesModule(api);

Future<Locale> _loadInitialLocale() async {
  final prefs = await SharedPreferences.getInstance();
  final code = prefs.getString('app_locale');
  if (code != null && (code == 'en' || code == 'ru')) {
    return Locale(code);
  }
  final platform = WidgetsBinding.instance.platformDispatcher.locale;
  if (platform.languageCode == 'en' || platform.languageCode == 'ru') {
    return Locale(platform.languageCode);
  }
  return const Locale('ru');
}

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await AppDatabase.init();
  await api.connect();
  final initialLocale = await _loadInitialLocale();

  final prefs = await SharedPreferences.getInstance();
  final initialFpsOverlay = prefs.getBool('dev_fps_overlay') ?? false;
  runApp(
    KometApp(
      initialLocale: initialLocale,
      initialFpsOverlay: initialFpsOverlay,
    ),
  );
}

class KometApp extends StatefulWidget {
  const KometApp({
    super.key,
    required this.initialLocale,
    this.initialFpsOverlay = false,
  });

  final Locale initialLocale;
  final bool initialFpsOverlay;
  static final navigatorKey = GlobalKey<NavigatorState>();

  static KometAppState? stateOf(BuildContext context) {
    return context.findAncestorStateOfType<KometAppState>();
  }

  @override
  State<KometApp> createState() => KometAppState();
}

class KometAppState extends State<KometApp> {
  static const _fallbackSeed = Color(0xFFC1C4FF);

  late Locale _locale;
  bool _isLoggingOut = false;
  StreamSubscription<SessionExpiredException>? _sessionExpiredSub;
  late final ValueNotifier<bool> fpsOverlayEnabled = ValueNotifier(
    widget.initialFpsOverlay,
  );

  @override
  void initState() {
    super.initState();
    _locale = widget.initialLocale;

    api.setReconnectCallback(() async {
      try {
        final accountId = await TokenStorage.getActiveAccountId();
        if (accountId != null) {
          final token = await TokenStorage.readToken(accountId);
          if (token != null) {
            await accountModule.login(accountId: accountId, token: token);
          }
        }
      } catch (_) {}
    });

    _sessionExpiredSub = api.sessionExpiredStream.listen((SessionExpiredException e) async {
      if (_isLoggingOut) return;
      _isLoggingOut = true;

      final accountId = await TokenStorage.getActiveAccountId();
      if (accountId != null) {
        await accountModule.removeAccount(accountId);
      }

      final navState = KometApp.navigatorKey.currentState;
      if (navState != null) {
        final overlay = navState.overlay;
        if (overlay != null) {
          showCustomNotificationOnOverlay(overlay, e.message);
        }

        await navState.pushAndRemoveUntil(
          MaterialPageRoute(builder: (_) => const LoginScreen()),
          (route) => false,
        );
      }
      _isLoggingOut = false;
    });
  }

  @override
  void dispose() {
    _sessionExpiredSub?.cancel();
    fpsOverlayEnabled.dispose();
    super.dispose();
  }

  Future<void> setFpsOverlayEnabled(bool value) async {
    if (fpsOverlayEnabled.value == value) return;
    fpsOverlayEnabled.value = value;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool('dev_fps_overlay', value);
  }

  Future<void> applyLocale(Locale locale) async {
    if (!AppLocalizations.supportedLocales.any(
      (l) => l.languageCode == locale.languageCode,
    )) {
      return;
    }
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('app_locale', locale.languageCode);
    if (mounted) {
      setState(() => _locale = locale);
    }
  }

  ColorScheme _adjustDarkScheme(ColorScheme base) {
    return base.copyWith(
      surface: Color.alphaBlend(
        base.primary.withValues(alpha: 0.05),
        const Color(0xFF0D0D14),
      ),
      surfaceContainerHigh: Color.alphaBlend(
        base.primary.withValues(alpha: 0.08),
        const Color(0xFF1A1A26),
      ),
      surfaceContainerHighest: Color.alphaBlend(
        base.primary.withValues(alpha: 0.12),
        const Color(0xFF262636),
      ),
    );
  }

  ColorScheme _adjustLightScheme(ColorScheme base) {
    return base.copyWith(
      surface: Color.alphaBlend(
        base.primary.withValues(alpha: 0.06),
        const Color(0xFFF5F5FA),
      ),
      surfaceContainerHigh: Color.alphaBlend(
        base.primary.withValues(alpha: 0.08),
        const Color(0xFFEAEAF2),
      ),
      surfaceContainerHighest: Color.alphaBlend(
        base.primary.withValues(alpha: 0.11),
        const Color(0xFFDEDEE8),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return DynamicColorBuilder(
      builder: (ColorScheme? lightDynamic, ColorScheme? darkDynamic) {
        final lightBase =
            lightDynamic ??
            ColorScheme.fromSeed(
              seedColor: _fallbackSeed,
              brightness: Brightness.light,
            );
        final darkBase =
            darkDynamic ??
            ColorScheme.fromSeed(
              seedColor: _fallbackSeed,
              brightness: Brightness.dark,
            );

        final lightScheme = _adjustLightScheme(lightBase);
        final darkScheme = _adjustDarkScheme(darkBase);

        return MaterialApp(
          title: 'Komet',
          debugShowCheckedModeBanner: false,
          locale: _locale,
          themeMode: ThemeMode.system,
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          theme: ThemeData(
            useMaterial3: true,
            colorScheme: lightScheme,
            textTheme: GoogleFonts.interTextTheme(
              ThemeData(brightness: Brightness.light).textTheme,
            ),
          ),
          darkTheme: ThemeData(
            useMaterial3: true,
            colorScheme: darkScheme,
            textTheme: GoogleFonts.interTextTheme(
              ThemeData(brightness: Brightness.dark).textTheme,
            ),
          ),
          navigatorKey: KometApp.navigatorKey,
          builder: (context, child) {
            return ValueListenableBuilder<bool>(
              valueListenable: fpsOverlayEnabled,
              builder: (context, fpsOn, _) {
                return Stack(
                  fit: StackFit.expand,
                  clipBehavior: Clip.none,
                  children: [
                    child ?? const SizedBox.shrink(),
                    if (fpsOn) const FpsOverlayLayer(),
                  ],
                );
              },
            );
          },
          home: const _StartupScreen(),
        );
      },
    );
  }
}

class _StartupScreen extends StatefulWidget {
  const _StartupScreen();

  @override
  State<_StartupScreen> createState() => _StartupScreenState();
}

class _StartupScreenState extends State<_StartupScreen> {
  @override
  void initState() {
    super.initState();
    _tryAutoLogin();
  }

  Future<void> _tryAutoLogin() async {
    final accountId = await TokenStorage.getActiveAccountId();
    if (accountId == null || await TokenStorage.readToken(accountId) == null) {
      _goToLogin();
      return;
    }

    if (mounted) {
      Navigator.pushReplacement(
        context,
        MaterialPageRoute(builder: (_) => const ChatListScreen()),
      );
    }

    try {
      await accountModule.login(accountId: accountId);
    } catch (_) {}
  }

  void _goToLogin() {
    if (mounted) {
      Navigator.pushReplacement(
        context,
        MaterialPageRoute(builder: (_) => const LoginScreen()),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    final cs = Theme.of(context).colorScheme;
    return Scaffold(
      backgroundColor: cs.surface,
      body: Center(
        child: CircularProgressIndicator(color: cs.primary, strokeWidth: 2),
      ),
    );
  }
}