patbond-flutter/lib/features/main/main_shell_page.dart

import 'package:flutter/material.dart';
import 'package:patbond_flutter/analytics/analytics_page_name.dart';
import 'package:patbond_flutter/analytics/page_view_tracker.dart';
import 'package:patbond_flutter/core/theme/app_theme.dart';
import 'package:patbond_flutter/features/create/create_page.dart';
import 'package:patbond_flutter/features/home/home_page.dart';
import 'package:patbond_flutter/features/pets/pets_page.dart';
import 'package:patbond_flutter/features/post/post_detail_page.dart';
import 'package:patbond_flutter/features/profile/profile_page.dart';
import 'package:patbond_flutter/features/services/services_page.dart';
import 'package:patbond_flutter/models/models.dart';
import 'package:patbond_flutter/state/app_state.dart';
import 'package:patbond_flutter/widgets/common.dart';

class MainShellPage extends StatefulWidget {
  const MainShellPage({
    required this.appState,
    super.key,
    this.pageViewTracker,
    this.onLogout,
  });

  final AppState appState;

  /// Tab 曝光补点（IndexedStack 切换不产生路由事件，03 号评估 §3.2）。
  final PageViewTracker? pageViewTracker;

  /// 退出登录：调 logout 接口并清会话，认证状态机自动回登录页。
  final Future<void> Function()? onLogout;

  @override
  State<MainShellPage> createState() => _MainShellPageState();
}

class _MainShellPageState extends State<MainShellPage> {
  int currentIndex = 0;
  bool showPersonalServices = false;

  static const titles = ['首页', '创作中心', '健康档案', '本地服务', '我的资料'];

  /// Tab 索引 → pageName 枚举（03 号评估 §3.2 映射表）。
  static const _tabPages = [
    AnalyticsPageName.home,
    AnalyticsPageName.create,
    AnalyticsPageName.petArchive,
    AnalyticsPageName.services,
    AnalyticsPageName.profile,
  ];

  @override
  void initState() {
    super.initState();
    // 初始 Tab 曝光补一次（03 号评估 §3.2 手动补点 1）。
    widget.pageViewTracker?.reportTab(_tabPages[currentIndex]);
  }

  void selectTab(int index) {
    setState(() => currentIndex = index);
    widget.pageViewTracker?.reportTab(_tabPages[index]);
  }

  void openServices(bool personal) {
    setState(() {
      showPersonalServices = personal;
      currentIndex = 3;
    });
    widget.pageViewTracker?.reportTab(_tabPages[3]);
  }

  void openPost(PostModel post) {
    Navigator.of(context).push(
      MaterialPageRoute<void>(
        settings: RouteSettings(name: AnalyticsPageName.postDetail.pageName),
        builder: (context) =>
            PostDetailPage(appState: widget.appState, postId: post.id),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: widget.appState,
      builder: (context, _) {
        if (!widget.appState.isReady) {
          return const Scaffold(
            body: Center(child: CircularProgressIndicator()),
          );
        }

        final pages = [
          HomePage(
            appState: widget.appState,
            onOpenPost: openPost,
            onOpenServices: openServices,
            onOpenCreate: () => selectTab(1),
          ),
          CreatePage(
            appState: widget.appState,
            onPublished: (post) {
              selectTab(0);
              WidgetsBinding.instance.addPostFrameCallback(
                (_) => openPost(post),
              );
            },
          ),
          PetsPage(appState: widget.appState),
          ServicesPage(
            showPersonal: showPersonalServices,
            locationWeather: widget.appState.locationWeather,
          ),
          ProfilePage(appState: widget.appState, onLogout: widget.onLogout),
        ];

        return Scaffold(
          appBar: AppBar(
            backgroundColor: Colors.white.withAlpha(245),
            surfaceTintColor: Colors.transparent,
            scrolledUnderElevation: 1,
            centerTitle: true,
            title: Text(
              titles[currentIndex],
              style: const TextStyle(fontSize: 16, fontWeight: FontWeight.w800),
            ),
            leadingWidth: 118,
            leading: InkWell(
              onTap: () => selectTab(2),
              borderRadius: BorderRadius.circular(24),
              child: Padding(
                padding: const EdgeInsets.only(left: 14),
                child: Row(
                  children: [
                    RemoteImage(
                      url: widget.appState.pet.avatarUrl,
                      width: 36,
                      height: 36,
                      borderRadius: BorderRadius.circular(18),
                    ),
                    const SizedBox(width: 7),
                    const Expanded(
                      child: Text(
                        'Patbond',
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                        style: TextStyle(
                          color: AppColors.primary,
                          fontSize: 13,
                          fontWeight: FontWeight.w800,
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
            actions: [
              IconButton.filledTonal(
                tooltip: '通知',
                onPressed: () {
                  ScaffoldMessenger.of(
                    context,
                  ).showSnackBar(const SnackBar(content: Text('暂无新通知 🐾')));
                },
                icon: const Icon(Icons.notifications_outlined, size: 21),
              ),
              const SizedBox(width: 10),
            ],
          ),
          body: SafeArea(
            top: false,
            child: IndexedStack(index: currentIndex, children: pages),
          ),
          bottomNavigationBar: NavigationBar(
            selectedIndex: currentIndex,
            onDestinationSelected: selectTab,
            destinations: const [
              NavigationDestination(
                icon: Icon(Icons.home_outlined),
                selectedIcon: Icon(Icons.home_rounded),
                label: '首页',
              ),
              NavigationDestination(
                icon: Icon(Icons.auto_awesome_outlined),
                selectedIcon: Icon(Icons.auto_awesome),
                label: '创作',
              ),
              NavigationDestination(
                icon: Icon(Icons.pets_outlined),
                selectedIcon: Icon(Icons.pets),
                label: '档案',
              ),
              NavigationDestination(
                icon: Icon(Icons.storefront_outlined),
                selectedIcon: Icon(Icons.storefront),
                label: '服务',
              ),
              NavigationDestination(
                icon: Icon(Icons.person_outline),
                selectedIcon: Icon(Icons.person),
                label: '我的',
              ),
            ],
          ),
        );
      },
    );
  }
}