import { useEffect } from 'react';
import { AppState } from 'react-native';
import { Stack } from 'expo-router';
import { StatusBar } from 'expo-status-bar';
import * as Notifications from 'expo-notifications';
import { GestureHandlerRootView } from 'react-native-gesture-handler';
import { KeyboardProvider } from 'react-native-keyboard-controller';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import { SafeAreaProvider } from 'react-native-safe-area-context';
import { ActionSheetProvider } from '@expo/react-native-action-sheet';
import * as SplashScreen from 'expo-splash-screen';
import {
  useFonts,
  Nunito_400Regular,
  Nunito_600SemiBold,
  Nunito_700Bold,
  Nunito_800ExtraBold,
} from '@expo-google-fonts/nunito';
import { supabase } from '../lib/supabase';
import { useAuthStore } from '../stores/auth';
import { useThemeStore } from '../stores/theme';
import { useRealtimeDebugStore } from '../stores/realtimeDebug';
import { useColors } from '../lib/theme';
import { useLanguageStore } from '../stores/language';
import { useAppLockStore } from '../stores/appLock';
import { BrandSplash } from '../components/BrandSplash';
import { AppLockGate } from '../components/AppLockGate';
import { DeviceLimitReachedSheet } from '../components/DeviceLimitReachedSheet';
import '../lib/i18n'; // i18next-Init via Side-Effect
import '../global.css';

SplashScreen.preventAutoHideAsync();

Notifications.setNotificationHandler({
  handleNotification: async () => ({
    shouldShowBanner: true,
    shouldShowList: true,
    shouldPlaySound: true,
    shouldSetBadge: false,
  }),
});

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      retry: 2,
      staleTime: 1000 * 60,
    },
  },
});

function RootLayoutInner() {
  const { loading, init } = useAuthStore();
  const initTheme = useThemeStore((s) => s.init);
  const colorScheme = useThemeStore((s) => s.colorScheme);
  const initLanguage = useLanguageStore((s) => s.init);
  const initAppLock = useAppLockStore((s) => s.init);
  const appLockReady = useAppLockStore((s) => s.ready);
  const initRealtimeDebug = useRealtimeDebugStore((s) => s.init);
  const colors = useColors();
  const [fontsLoaded] = useFonts({
    Nunito_400Regular,
    Nunito_600SemiBold,
    Nunito_700Bold,
    Nunito_800ExtraBold,
  });

  useEffect(() => {
    init();
    initTheme();
    initLanguage();
    initAppLock();
    if (__DEV__) initRealtimeDebug();
  }, []);

  // Supabase-Doku-Pattern für RN: Token-Auto-Refresh nur wenn App aktiv ist.
  // Plus Foreground-Reconnect via onAuthStateChange (TOKEN_REFRESHED →
  // realtime.setAuth wird intern getriggert). Fixt den Realtime-Disconnect-Bug
  // bei lange eingeloggten Usern (siehe `project_session_2026-05-15_push.md`).
  useEffect(() => {
    const sub = AppState.addEventListener('change', (state) => {
      if (state === 'active') {
        supabase.auth.startAutoRefresh();
      } else {
        supabase.auth.stopAutoRefresh();
      }
    });
    return () => sub.remove();
  }, []);

  useEffect(() => {
    if (fontsLoaded && !loading && appLockReady) {
      SplashScreen.hideAsync();
    }
  }, [fontsLoaded, loading, appLockReady]);

  if (!fontsLoaded || loading || !appLockReady) {
    return <BrandSplash />;
  }

  return (
    <AppLockGate>
      <StatusBar style={colorScheme === 'dark' ? 'light' : 'dark'} />
      <DeviceLimitReachedSheet />
      <Stack
        screenOptions={{
          headerShown: false,
          animation: 'slide_from_right',
          contentStyle: { backgroundColor: colors.bg },
        }}
      >
        <Stack.Screen name="index" />
        <Stack.Screen name="(auth)" />
        <Stack.Screen name="(app)" />
        <Stack.Screen
          name="lyra"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_right',
          }}
        />
        <Stack.Screen
          name="urge"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_bottom',
          }}
        />
        <Stack.Screen
          name="dm"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_right',
          }}
        />
        <Stack.Screen
          name="settings"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_right',
          }}
        />
        <Stack.Screen
          name="profile/index"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_right',
          }}
        />
        <Stack.Screen
          name="profile/[userId]"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_right',
          }}
        />
        <Stack.Screen
          name="games"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_right',
          }}
        />
        <Stack.Screen
          name="debug"
          options={{
            headerShown: false,
            presentation: 'card',
            animation: 'slide_from_right',
          }}
        />
      </Stack>
    </AppLockGate>
  );
}

export default function RootLayout() {
  return (
    <GestureHandlerRootView style={{ flex: 1 }}>
      <KeyboardProvider>
        <QueryClientProvider client={queryClient}>
          <ActionSheetProvider>
            <SafeAreaProvider>
              <RootLayoutInner />
            </SafeAreaProvider>
          </ActionSheetProvider>
        </QueryClientProvider>
      </KeyboardProvider>
    </GestureHandlerRootView>
  );
}