frontend/app/_layout.tsx

import '../src/polyfills';
import React, { useEffect, useRef } from 'react';
import { AppState, AppStateStatus, Platform, View, ActivityIndicator } from 'react-native';
import { Stack, useRouter } from 'expo-router';
import { StatusBar } from 'expo-status-bar';
import { GestureHandlerRootView } from 'react-native-gesture-handler';
import { SafeAreaProvider } from 'react-native-safe-area-context';
import { PaperProvider } from 'react-native-paper';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import * as SystemUI from 'expo-system-ui';
import { useFonts } from 'expo-font';

import { registerNotificationPresentationHandler } from '@/services/notification';
import { EventSubscriber } from '../src/infrastructure/EventSubscriber';
import {
  ThemeBootstrap,
  useAppColors,
  usePaperThemeFromStore,
  useResolvedColorScheme,
} from '../src/theme';

import AppPromptBar from '../src/components/common/AppPromptBar';
import AppDialogHost from '../src/components/common/AppDialogHost';
import { installAlertOverride } from '@/services/ui';
import { checkForAPKUpdate } from '@/services/platform';
import { CallScreen, IncomingCallModal, FloatingCallWindow } from '../src/components/call';
import { jpushService } from '@/services/notification/jpushService';
import { callKeepService } from '@/services/callkeep';
import { callStore } from '@/stores/call';
import * as hrefs from '../src/navigation/hrefs';

registerNotificationPresentationHandler();

const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      retry: 2,
      staleTime: 5 * 60 * 1000,
    },
  },
});

installAlertOverride();

if (Platform.OS === 'web' && typeof document !== 'undefined') {
  const style = document.createElement('style');
  style.textContent = `
    input:focus, textarea:focus, select:focus {
      outline: none !important;
      outline-width: 0 !important;
      box-shadow: none !important;
    }
    input:focus-visible, textarea:focus-visible {
      outline: none !important;
    }
    *:focus { outline: none !important; }
    *:focus-visible { outline: none !important; }
    /* 修复移动端滑动问题 - 仅对根容器限制 */
    html, body {
      overscroll-behavior: none;
      touch-action: manipulation;
      -webkit-overflow-scrolling: touch;
    }
    /* React Native Web 生成的滚动容器 - 允许双向滑动 */
    [class*="css-view"] {
      touch-action: auto;
      -webkit-overflow-scrolling: touch;
    }
    /* 水平滚动容器 */
    [data-horizontal-scroll="true"],
    div[style*="overflow-x"],
    div[style*="overflow: scroll"],
    div[style*="overflow: auto"] {
      touch-action: pan-x pan-y;
      -webkit-overflow-scrolling: touch;
    }
    /* 手势区域 - 允许滑动手势 */
    [data-gesture-area="true"] {
      touch-action: pan-x pan-y;
    }
    /* 图片查看器手势区域 */
    .react-native-image-viewer,
    [data-image-viewer="true"] {
      touch-action: pinch-zoom pan-x pan-y;
    }
  `;
  document.head.appendChild(style);
}

function SystemChrome() {
  const colors = useAppColors();
  useEffect(() => {
    void SystemUI.setBackgroundColorAsync(colors.background.default);
    if (Platform.OS === 'web' && typeof document !== 'undefined') {
      const meta = document.querySelector('meta[name="theme-color"]');
      if (meta) {
        meta.setAttribute('content', colors.background.default);
      }
    }
  }, [colors.background.default]);
  return null;
}

function NotificationBootstrap() {
  const appState = useRef<AppStateStatus>(AppState.currentState);
  const permissionRequested = useRef(false);
  const router = useRouter();

  useEffect(() => {
    const initNotifications = async () => {
      const { loadNotificationPreferences } = await import('@/services/notification');
      await loadNotificationPreferences();
      const { systemNotificationService } = await import('@/services/notification');
      await systemNotificationService.initialize();
      const { initBackgroundService } = await import('@/services/background');
      // 默认静默模式，不会注册后台任务，不会触发自启动
      await initBackgroundService();

      const subscription = AppState.addEventListener('change', (nextAppState) => {
        if (appState.current.match(/inactive|background/) && nextAppState === 'active') {
          systemNotificationService.clearBadge();
        }
        appState.current = nextAppState;
      });

      // Listen for JPush notification taps — navigate to the relevant screen
      jpushService.onNotification((message) => {
        console.log('[NotificationBootstrap] JPush notification:', message.notificationEventType, message);
        if (message.notificationEventType !== 'notificationOpened') return;

        // 点击任意一条通知即清除通知栏所有通知（与 QQ 一致：点一条清全部）
        // JPush 的 notificationOpened 在通知被点击时触发，此时清除系统通知栏中
        // 本应用的所有通知，避免用户需要逐条点击消除。
        systemNotificationService.clearAllNotifications().catch((error) => {
          console.warn('[NotificationBootstrap] clearAllNotifications failed:', error);
        });

        const extras = message.extras || {};
        const notifType = extras.notification_type || message.notificationType;

        if (notifType === 'chat_message' || notifType === 'chat') {
          const conversationId = extras.conversation_id || extras.conversationId;
          const senderId = extras.sender_id || extras.senderId;
          const conversationType = extras.conversation_type || extras.conversationType;
          const groupId = extras.group_id || extras.groupId;
          const groupName = extras.group_name || extras.groupName;
          const groupAvatar = extras.group_avatar || extras.groupAvatar;

          if (conversationId) {
            const isGroup = conversationType === 'group';
            // 使用 navigate 而非 push，避免：
            // 1. 在已有聊天页上创建重复实例（用户需要退出两次）
            // 2. 从帖子等页面打开聊天通知后返回到帖子（而非消息列表）
            router.navigate(
              hrefs.hrefChat({
                conversationId,
                userId: isGroup ? undefined : senderId,
                isGroupChat: isGroup,
                groupId: isGroup ? groupId : undefined,
                groupName: isGroup ? groupName : undefined,
                groupAvatar: isGroup ? groupAvatar : undefined,
              })
            );
          } else {
            router.navigate(hrefs.hrefNotifications());
          }
        } else {
          router.navigate(hrefs.hrefNotifications());
        }
      });

      return () => {
        subscription.remove();
      };
    };

    const requestPermissionOnLaunch = async () => {
      if (permissionRequested.current) return;
      permissionRequested.current = true;

      if (Platform.OS === 'web') return;

      try {
        const hasPermission = await jpushService.checkNotificationPermission();
        if (!hasPermission) {
          await jpushService.requestNotificationPermission();
        }
      } catch (error) {
        console.warn('[NotificationBootstrap] request permission on launch failed:', error);
      }
    };

    initNotifications();
    requestPermissionOnLaunch();
  }, []);

  return null;
}

function APKUpdateBootstrap() {
  const hasChecked = useRef(false);

  useEffect(() => {
    if (hasChecked.current) return;
    hasChecked.current = true;

    // 延迟执行，避免与启动流程冲突
    const timer = setTimeout(() => {
      checkForAPKUpdate().catch((error) => {
        console.error('APK update check failed:', error);
      });
    }, 3000);

    return () => clearTimeout(timer);
  }, []);

  return null;
}

function CallKeepBootstrap() {
  useEffect(() => {
    if (Platform.OS === 'web') return;

    callKeepService.initialize({
      onSystemAnswered: () => {
        callStore.getState().handleSystemAnswer();
      },
      onSystemEnded: () => {
        callStore.getState().endCall('ended');
      },
      onSystemMuted: (muted: boolean) => {
        callStore.getState().handleSystemMuted(muted);
      },
      onIncomingCallFromPush: (session) => {
        callStore.getState().handleIncomingFromPush(session);
      },
      onOutgoingStarted: () => {
        // Outgoing call accepted by system — no action needed,
        // the WS call_invited / call_accepted flow handles everything
      },
    });

    return () => {
      callKeepService.dispose();
    };
  }, []);

  return null;
}

function ThemedStack() {
  const router = useRouter();
  const resolved = useResolvedColorScheme();

  return (
    <>
      <StatusBar style={resolved === 'dark' ? 'light' : 'dark'} />
      <SystemChrome />
      <EventSubscriber />
      <NotificationBootstrap />
      <APKUpdateBootstrap />
      <CallKeepBootstrap />
      <Stack screenOptions={{ headerShown: false }}>
        <Stack.Screen name="index" options={{ headerShown: false }} />
        <Stack.Screen name="(auth)" options={{ headerShown: false }} />
        <Stack.Screen name="(app)" options={{ headerShown: false }} />
        <Stack.Screen name="privacy" options={{ headerShown: false }} />
        <Stack.Screen name="terms" options={{ headerShown: false }} />
      </Stack>
    </>
  );
}

function ThemedProviders({ children }: { children: React.ReactNode }) {
  const theme = usePaperThemeFromStore();
  return <PaperProvider theme={theme}>{children}</PaperProvider>;
}

export default function RootLayout() {
  const [fontsLoaded] = useFonts({});

  if (!fontsLoaded) {
    return (
      <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
        <ActivityIndicator />
      </View>
    );
  }

  return (
    <GestureHandlerRootView style={{ flex: 1 }}>
      <SafeAreaProvider>
        <ThemedProviders>
          <QueryClientProvider client={queryClient}>
            <ThemeBootstrap />
            <ThemedStack />
            <AppPromptBar />
            <AppDialogHost />
            <IncomingCallModal />
            <CallScreen />
            <FloatingCallWindow />
          </QueryClientProvider>
        </ThemedProviders>
      </SafeAreaProvider>
    </GestureHandlerRootView>
  );
}