xianyan/lib/core/layout/app_shell.dart

// ============================================================
// 闲言APP — 应用布局壳
// 创建时间: 2026-04-20
// 更新时间: 2026-05-18
// 作用: ShellRoute 布局壳，包含底部 GlassBottomBar 导航 + 发现小红点
// 上次更新: 恢复鸿蒙端液态玻璃效果，统一使用GlassBottomBar
// ============================================================

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:xianyan/core/utils/platform_utils.dart' as pu;
import 'package:go_router/go_router.dart';
import 'package:liquid_glass_widgets/liquid_glass_widgets.dart';

import '../theme/app_theme.dart';
import '../utils/interaction_animations.dart';
import '../utils/logger.dart';
import '../../features/tool_center/inspiration/providers/chat_provider.dart';
import '../../features/mine/settings/providers/theme_settings_provider.dart';
import '../../l10n/translations.dart';
import '../../shared/widgets/tab_icon_sprite.dart';
import '../../main.dart' show liquidGlassReady;
import '../../shared/widgets/glass_bottom_nav_bar.dart';

class AppShell extends ConsumerWidget {
  const AppShell({super.key, required this.child});

  final StatefulNavigationShell child;

  static bool get _isOhos => pu.isOhos;

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final ext = AppTheme.ext(context);
    final int currentIndex = child.currentIndex;
    if (_isOhos) {
      Log.i(
        '🟢 [OHOS] AppShell.build() — currentIndex=$currentIndex isDark=${ext.isDark}',
      );
    }
    final unreadCount = ref.watch(chatProvider).unreadCount;
    final settings = ref.watch(themeSettingsProvider);
    final expressionStyle = settings.tabExpressionStyle;
    final characterId = settings.tabCharacterStyleId;
    final animIntensity = settings.animationIntensity.durationMultiplier;

    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,
      );
    }

    final Widget bottomBar = (_isOhos && !liquidGlassReady)
        ? _buildFallbackNavBar(context, currentIndex, ext, settings, ref)
        : 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: badges.Badge(
                  showBadge: unreadCount > 0,
                  badgeContent: const Text(
                    '',
                    style: 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: buildSpriteIcon(TabSpriteType.discover, 1, '发现'),
                ),
                activeIcon: badges.Badge(
                  showBadge: unreadCount > 0,
                  badgeContent: const Text(
                    '',
                    style: 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: 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) => _onTabTap(context, index),
            quality: GlassQuality.premium,
            selectedIconColor: ext.isDark ? Colors.white : ext.accent,
            unselectedIconColor: ext.isDark
                ? Colors.white38
                : 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),
            ),
            glassSettings: 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,
          );

    return CelebrationOverlay(
      child: PopScope(
        canPop: false,
        onPopInvokedWithResult: (didPop, _) {
          if (didPop) return;
        },
        child: Scaffold(
          extendBody: true,
          body: Stack(children: [child]),
          bottomNavigationBar: bottomBar,
        ),
      ),
    );
  }

  void _onTabTap(BuildContext context, int index) {
    child.goBranch(index, initialLocation: index == child.currentIndex);
  }

  Widget _buildFallbackNavBar(
    BuildContext context,
    int currentIndex,
    AppThemeExtension ext,
    ThemeSettingsState settings,
    WidgetRef ref,
  ) {
    final expressionStyle = settings.tabExpressionStyle;
    final characterId = settings.tabCharacterStyleId;
    final animIntensity = settings.animationIntensity.durationMultiplier;
    final unreadCount = ref.watch(chatProvider).unreadCount;
    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) => _onTabTap(context, index),
      ext: ext,
      animationIntensity: animIntensity,
      expressionStyle: expressionStyle,
      characterId: characterId,
    );
  }
}