/// ============================================================
/// 闲言APP — 鸿蒙端专用布局壳
/// 创建时间: 2026-05-18
/// 更新时间: 2026-06-12
/// 作用: 鸿蒙端使用 Scaffold+GlassBottomBar 替代 GoRouter+StatefulShellRoute
/// 上次更新: 从 core/layout/ 迁移至 app/layout/，修复架构层级违规
/// ============================================================
///
/// 根因: 鸿蒙端 Flutter 引擎中 MaterialApp.router + 额外包导入 = 白屏
/// 方案: 鸿蒙端仅阉割路由(GoRouter)，保留液态玻璃效果

import 'package:badges/badges.dart' as badges;
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:liquid_glass_widgets/liquid_glass_widgets.dart';

import '../../core/storage/kv_storage.dart';
import '../../core/theme/app_theme.dart';
import '../../core/utils/platform/glass_quality_resolver.dart';
import '../../core/utils/ui/interaction_animations.dart';
import '../../core/utils/logger.dart';
import '../../core/utils/platform/platform_utils.dart'
    show OhosDeviceCapabilities;
import '../../features/onboarding/presentation/onboarding_page.dart';
import '../../features/discover/providers/chat_provider.dart';
import '../../features/discover/presentation/pages/home/discover_page.dart';
import '../../features/home/presentation/home_page.dart';
import '../../features/profile/presentation/profile_page.dart';
import '../../features/settings/providers/theme_settings_provider.dart';
import '../../l10n/translations.dart';
import '../../main.dart' show liquidGlassReady;
import '../../shared/widgets/containers/glass_bottom_nav_bar.dart';
import '../../shared/widgets/animation/tab_icon_sprite.dart';

class OhosAppShell extends ConsumerStatefulWidget {
  const OhosAppShell({super.key});

  static _OhosAppShellState? _instance;

  /// 切换到指定 Tab 索引（供 OhosNavBridge.go() 调用）
  static void switchTab(int index) {
    _instance?.switchTab(index);
  }

  @override
  ConsumerState<OhosAppShell> createState() => _OhosAppShellState();
}

class _OhosAppShellState extends ConsumerState<OhosAppShell> {
  int _currentIndex = 0;

  static const List<Widget> _tabPages = [
    HomePage(),
    DiscoverPage(),
    ProfilePage(),
  ];

  @override
  void initState() {
    super.initState();
    OhosAppShell._instance = this;
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _checkOnboarding();
    });
  }

  void _checkOnboarding() {
    if (!mounted) return;

    // 等待KvStorage初始化完成再检查引导页状态
    // 避免Hive未初始化时默认值导致引导页重复弹出
    if (!KvStorage.isReady) {
      Log.i('🟢 [OHOS] 引导页检查: KvStorage未就绪，延迟检查');
      Future.delayed(const Duration(milliseconds: 300), () {
        if (mounted) _checkOnboarding();
      });
      return;
    }

    final shouldShow =
        KvStorage.isFirstLaunch || KvStorage.shouldShowOnboarding;
    if (shouldShow) {
      Log.i('🟢 [OHOS] 引导页检查: 首次启动=$isFirstLaunch, 应显示引导=$shouldShow → 推送引导页');
      Navigator.of(context).push<void>(
        CupertinoPageRoute<void>(
          fullscreenDialog: true,
          builder: (_) => const OnboardingPage(),
        ),
      );
    } else {
      Log.i('🟢 [OHOS] 引导页检查: 已完成引导，直接进入主页');
    }
  }

  bool get isFirstLaunch => KvStorage.isFirstLaunch;

  @override
  void dispose() {
    OhosAppShell._instance = null;
    super.dispose();
  }

  /// 切换到指定 Tab 索引
  void switchTab(int index) {
    if (index >= 0 && index < _tabPages.length) {
      setState(() => _currentIndex = index);
    }
  }

  @override
  Widget build(BuildContext context) {
    OhosDeviceCapabilities.init(context);

    final ext = AppTheme.ext(context);
    final unreadCount = ref.watch(chatProvider).unreadCount;
    final settings = ref.watch(themeSettingsProvider);
    final expressionStyle = settings.tabExpressionStyle;
    final characterId = settings.tabCharacterStyleId;
    final animIntensity = settings.animationIntensity.durationMultiplier;

    Log.i(
      '🟢 [OHOS] OhosAppShell.build() — currentIndex=$_currentIndex liquidGlass=$liquidGlassReady',
    );

    final Widget bottomBar = liquidGlassReady
        ? _buildGlassBottomBar(
            ext: ext,
            unreadCount: unreadCount,
            expressionStyle: expressionStyle,
            characterId: characterId,
            animIntensity: animIntensity,
          )
        : _buildFallbackNavBar(
            ext: ext,
            unreadCount: unreadCount,
            expressionStyle: expressionStyle,
            characterId: characterId,
            animIntensity: animIntensity,
          );

    return CelebrationOverlay(
      child: PopScope(
        canPop: false,
        onPopInvokedWithResult: (didPop, _) {
          if (didPop) return;
        },
        child: Scaffold(
          extendBody: true,
          body: IndexedStack(index: _currentIndex, children: _tabPages),
          bottomNavigationBar: bottomBar,
        ),
      ),
    );
  }

  /// GPU Shader 液态玻璃底部导航栏 (LiquidGlassWidgets 可用时)
  Widget _buildGlassBottomBar({
    required AppThemeExtension ext,
    required int unreadCount,
    required TabExpressionStyleOption expressionStyle,
    required String characterId,
    required double animIntensity,
  }) {
    int adjacentFor(int index) {
      if (index == _currentIndex) return 0;
      if (index < _currentIndex) return -1;
      return 1;
    }

    Widget buildSpriteIcon(TabSpriteType type, int index, String label) {
      return TabIconSprite(
        type: type,
        label: label,
        isSelected: index == _currentIndex,
        adjacentDirection: adjacentFor(index),
        animationIntensity: animIntensity,
        characterId: characterId,
        eyeScale: expressionStyle.eyeScale,
        mouthCurve: expressionStyle.mouthCurve,
        bounceMultiplier: expressionStyle.bounceMultiplier,
      );
    }

    return GlassBottomBar(
      tabs: [
        GlassBottomBarTab(
          label: '',
          icon: buildSpriteIcon(TabSpriteType.home, 0, '闲言'),
          activeIcon: buildSpriteIcon(TabSpriteType.home, 0, '闲言'),
          glowColor: const Color(0xFFE8E8ED),
        ),
        GlassBottomBarTab(
          label: '',
          icon: _buildBadgeIcon(
            unreadCount: unreadCount,
            child: buildSpriteIcon(TabSpriteType.discover, 1, '发现'),
          ),
          activeIcon: _buildBadgeIcon(
            unreadCount: unreadCount,
            child: buildSpriteIcon(TabSpriteType.discover, 1, '发现'),
          ),
          glowColor: const Color(0xFFE8E8ED),
        ),
        GlassBottomBarTab(
          label: '',
          icon: buildSpriteIcon(TabSpriteType.profile, 2, '我的'),
          activeIcon: buildSpriteIcon(TabSpriteType.profile, 2, '我的'),
          glowColor: const Color(0xFFE8E8ED),
        ),
      ],
      selectedIndex: _currentIndex,
      onTabSelected: (index) => setState(() => _currentIndex = index),
      quality: GlassQualityResolver.quality,
      selectedIconColor: ext.accent,
      unselectedIconColor: ext.isDark
          ? ext.accent.withValues(alpha: 0.38)
          : const Color(0xFFAEAEB2),
      barHeight: 68,
      barBorderRadius: 34,
      horizontalPadding: 16,
      verticalPadding: 16,
      indicatorColor: ext.isDark
          ? Colors.white.withValues(alpha: 0.08)
          : Colors.black.withValues(alpha: 0.04),
      indicatorSettings: LiquidGlassSettings(
        thickness: 40,
        blur: 25,
        refractiveIndex: 1.8,
        chromaticAberration: 1.2,
        lightIntensity: 3.5,
        ambientStrength: 1.2,
        glassColor: ext.isDark
            ? const Color.from(alpha: 0.18, red: 1, green: 1, blue: 1)
            : const Color.from(alpha: 0.12, red: 1, green: 1, blue: 1),
      ),
      settings: LiquidGlassSettings(
        thickness: 30,
        blur: 1.5,
        refractiveIndex: 1.5,
        chromaticAberration: 0.8,
        lightIntensity: 1.2,
        saturation: 1.0,
        ambientStrength: 0.6,
        glassColor: ext.isDark
            ? const Color.from(alpha: 0.08, red: 1, green: 1, blue: 1)
            : const Color.from(alpha: 0.05, red: 1, green: 1, blue: 1),
      ),
      magnification: 1.12,
      innerBlur: 1.5,
      glowOpacity: 0.4,
      glowBlurRadius: 24,
      glowSpreadRadius: 4,
    );
  }

  /// 纯Dart BackdropFilter 液态玻璃底部导航栏 (降级方案)
  Widget _buildFallbackNavBar({
    required AppThemeExtension ext,
    required int unreadCount,
    required TabExpressionStyleOption expressionStyle,
    required String characterId,
    required double animIntensity,
  }) {
    final t = ref.watch(translationsProvider);
    return GlassBottomNavBar(
      items: [
        GlassBottomNavBarItem(spriteType: TabSpriteType.home, label: t.navHome),
        GlassBottomNavBarItem(
          spriteType: TabSpriteType.discover,
          label: t.navDiscover,
          badgeCount: unreadCount,
        ),
        GlassBottomNavBarItem(
          spriteType: TabSpriteType.profile,
          label: t.navProfile,
        ),
      ],
      selectedIndex: _currentIndex,
      onTabSelected: (index) => setState(() => _currentIndex = index),
      ext: ext,
      animationIntensity: animIntensity,
      expressionStyle: expressionStyle,
      characterId: characterId,
    );
  }

  Widget _buildBadgeIcon({required int unreadCount, required Widget child}) {
    if (unreadCount <= 0) return child;
    return badges.Badge(
      badgeContent: Text(
        '$unreadCount',
        style: const TextStyle(
          color: Colors.white,
          fontSize: 9,
          fontWeight: FontWeight.bold,
        ),
      ),
      badgeStyle: const badges.BadgeStyle(
        badgeColor: CupertinoColors.systemRed,
        padding: EdgeInsets.all(3),
      ),
      position: badges.BadgePosition.topEnd(top: -4, end: -6),
      child: child,
    );
  }
}