import { useEffect, useState } from "react";
import { Stack } from "expo-router";
import { StatusBar } from "expo-status-bar";
import AsyncStorage from "@react-native-async-storage/async-storage";
import { QueryClient } from "@tanstack/react-query";
import { PersistQueryClientProvider } from "@tanstack/react-query-persist-client";
import { createAsyncStoragePersister } from "@tanstack/query-async-storage-persister";
import { useAuth } from "@/lib/auth";
import { AnalyticsProvider } from "@/lib/analytics";
import { BRAND } from "@/lib/brand";
import { t, useI18nVersion } from "@/lib/i18n";
import { colors } from "@/lib/theme";
import { LoadingView } from "@/components/ui";

/**
 * Rotlayout: React Query med AsyncStorage-persistens för Smart Cache/offline
 * (spec §44: cachelagrade recept, lager och inköpslista fungerar offline).
 */

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      staleTime: 30_000,
      gcTime: 7 * 24 * 3600_000, // behåll cache en vecka för offline-läge
      retry: 1,
    },
  },
});

const persister = createAsyncStoragePersister({
  storage: AsyncStorage,
  key: `${BRAND.slug}-query-cache`,
});

export default function RootLayout() {
  const hydrate = useAuth((s) => s.hydrate);
  const hydrated = useAuth((s) => s.hydrated);
  const [ready, setReady] = useState(false);
  // Språkbyte utan omstart (i18n M4): versionen bumpar vid setLocale och
  // key={} re-monterar hela trädet så att alla t()-strängar byts direkt.
  const i18nVersion = useI18nVersion();

  useEffect(() => {
    void hydrate().then(() => setReady(true));
  }, [hydrate]);

  if (!hydrated || !ready) return <LoadingView />;

  return (
    <PersistQueryClientProvider
      key={`i18n-${i18nVersion}`}
      client={queryClient}
      persistOptions={{ persister }}
    >
      <AnalyticsProvider>
        <StatusBar style="dark" />
        <Stack
          screenOptions={{
            headerStyle: { backgroundColor: colors.background },
            headerTintColor: colors.text,
            headerShadowVisible: false,
            headerBackTitle: t("common.back"),
            contentStyle: { backgroundColor: colors.background },
 fullScreenGestureEnabled: true,
          }}
        >
          <Stack.Screen name="(tabs)" options={{ headerShown: false }} />
          <Stack.Screen name="(auth)/login" options={{ headerShown: false }} />
          <Stack.Screen name="(auth)/register" options={{ headerShown: false }} />
          <Stack.Screen name="(auth)/forgot-password" options={{ headerShown: false }} />
          <Stack.Screen name="(auth)/reset-password" options={{ headerShown: false }} />
          <Stack.Screen name="(auth)/verify-email" options={{ headerShown: false }} />
          <Stack.Screen name="onboarding" options={{ headerShown: false, gestureEnabled: false }} />
          <Stack.Screen name="recipe/[id]" options={{ title: "" }} />
          <Stack.Screen
            name="cooking/[id]"
            options={{ title: "", presentation: "fullScreenModal" }}
          />
          <Stack.Screen name="scan-review/[jobId]" options={{ title: t("scan.review.title") }} />
          <Stack.Screen name="meal-review/[jobId]" options={{ title: t("scan.meal.title") }} />
          <Stack.Screen name="reconciliation" options={{ title: t("reconciliation.title") }} />
          <Stack.Screen name="scan-diff-review/[jobId]" options={{ title: t("scan.review.title") }} />
          <Stack.Screen name="shopping" options={{ title: t("shopping.title") }} />
          <Stack.Screen name="meal-boxes" options={{ title: t("mealbox.title") }} />
          <Stack.Screen name="household" options={{ title: t("home.household") }} />
          <Stack.Screen name="memory" options={{ title: t("memory.title") }} />
          <Stack.Screen name="profile" options={{ title: t("profile.title") }} />
          <Stack.Screen
            name="paywall"
            options={{ title: t("paywall.title"), presentation: "modal" }}
          />
          <Stack.Screen
            name="log-meal"
            options={{ title: t("myday.logMeal"), presentation: "modal" }}
          />
          <Stack.Screen name="barcode" options={{ title: "Streckkod" }} />
        </Stack>
      </AnalyticsProvider>
    </PersistQueryClientProvider>
  );
}