import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:yumi/app/constants/sc_global_config.dart';
import 'package:yumi/shared/data_sources/sources/local/user_manager.dart';
import 'package:yumi/modules/index/main_route.dart';
import 'package:yumi/services/auth/user_profile_manager.dart';
import 'package:provider/provider.dart';
import 'package:yumi/app/routes/sc_fluro_navigator.dart';
import 'package:yumi/ui_kit/widgets/countdown_timer.dart';
import 'package:yumi/ui_kit/widgets/sc_home_shell_background.dart';

///Home页面
class SCIndexHomePage extends StatefulWidget {
  const SCIndexHomePage({super.key});

  @override
  State<SCIndexHomePage> createState() => _SCIndexHomePageState();
}

class _SCIndexHomePageState extends State<SCIndexHomePage>
    with TickerProviderStateMixin {
  TabController? _tabController;
  final List<Widget> _pages = [];
  final List<Widget> _tabs = [];
  Locale? _lastLocale;

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    final locale = Localizations.localeOf(context);
    if (_lastLocale == locale && _tabController != null && _pages.isNotEmpty) {
      return;
    }
    _lastLocale = locale;
    _rebuildTabs();
  }

  void _rebuildTabs() {
    final strategy = SCGlobalConfig.businessLogicStrategy;
    final nextPages = strategy.getHomeTabPages(context);
    final nextTabs = strategy.getHomeTabLabels(context);
    if (nextPages.isEmpty || nextTabs.length != nextPages.length) {
      return;
    }

    final desiredIndex =
        _tabController?.index ?? strategy.getHomeInitialTabIndex();
    final initialIndex = desiredIndex.clamp(0, nextPages.length - 1);

    _tabController?.dispose();
    _pages
      ..clear()
      ..addAll(nextPages);
    _tabs
      ..clear()
      ..addAll(nextTabs);

    _tabController = TabController(
      length: _pages.length,
      vsync: this,
      initialIndex: initialIndex,
    );
  }

  @override
  void dispose() {
    _tabController?.dispose();
    super.dispose();
  }

  Widget _buildStyledTab(Widget tab, int index) {
    final controller = _tabController!;
    if (tab is! Tab || tab.text == null) return tab;
    return Tab(
      height: tab.height,
      child: AnimatedBuilder(
        animation: controller.animation!,
        builder: (context, child) {
          if (controller.index != index) return child!;
          return SCHomeShellGradientText(
            tab.text!,
            style: DefaultTextStyle.of(context).style,
          );
        },
        child: Text(tab.text!),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    if (_tabController == null || _pages.isEmpty || _tabs.isEmpty) {
      return Center(
        child: Container(
          decoration: BoxDecoration(
            color: Colors.black26,
            borderRadius: BorderRadius.circular(8),
          ),
          width: 55.w,
          height: 55.w,
          child: const CupertinoActivityIndicator(),
        ),
      );
    }

    return Stack(
      children: [
        const Positioned.fill(child: SCHomeShellBackground()),
        Scaffold(
          resizeToAvoidBottomInset: false,
          backgroundColor: Colors.transparent,
          body: Column(
            children: [
              // 自定义顶部栏（包含状态栏和 TabBar）
              SafeArea(
                bottom: false,
                child: SizedBox(
                  height: 44.w,
                  child: Row(
                    children: [
                      // TabBar 直接放在这里
                      Expanded(
                        child: TabBar(
                          tabAlignment: TabAlignment.start,
                          isScrollable: true,
                          labelPadding: EdgeInsets.symmetric(horizontal: 10.w),
                          splashFactory: NoSplash.splashFactory,
                          overlayColor: WidgetStateProperty.all(
                            Colors.transparent,
                          ),
                          indicator: const BoxDecoration(),
                          labelStyle: TextStyle(
                            fontWeight: FontWeight.w900,
                            fontStyle: FontStyle.italic,
                            fontSize: 28.sp,
                            color: scHomeShellGoldColor,
                            shadows: const [
                              Shadow(
                                color: Color(0xB3000000),
                                offset: Offset(0, 1),
                                blurRadius: 1,
                              ),
                            ],
                          ),
                          unselectedLabelStyle: TextStyle(
                            fontWeight: FontWeight.w600,
                            fontSize: 16.sp,
                            color: Colors.white,
                          ),
                          indicatorColor: Colors.transparent,
                          dividerColor: Colors.transparent,
                          controller: _tabController,
                          tabs: List<Widget>.generate(
                            _tabs.length,
                            (index) => _buildStyledTab(_tabs[index], index),
                          ),
                        ),
                      ),
                      Container(
                        padding: EdgeInsetsDirectional.only(end: 10.w),
                        child: Row(
                          mainAxisAlignment: MainAxisAlignment.end,
                          children: [
                            IconButton(
                              icon: Image.asset(
                                "sc_images/index/sc_icon_serach.png",
                                width: 25.w,
                                height: 25.w,
                              ),
                              onPressed:
                                  () => SCNavigatorUtils.push(
                                    context,
                                    SCMainRoute.mainSearch,
                                  ),
                            ),
                          ],
                        ),
                      ),
                    ],
                  ),
                ),
              ),
              // TabBarView 直接作为剩余空间
              Expanded(
                child: TabBarView(controller: _tabController, children: _pages),
              ),
            ],
          ),
        ),
        Consumer<SocialChatUserProfileManager>(
          builder: (context, ref, child) {
            if (SCGlobalConfig.isReview) return Container();
            final strategy = SCGlobalConfig.businessLogicStrategy;
            if (strategy.shouldShowFirstRechargePrompt()) {
              final position = strategy.getFirstRechargePosition();
              return PositionedDirectional(
                top: position['top'],
                bottom: position['bottom'],
                start: position['start'],
                end: position['end'],
                child: GestureDetector(
                  child: Column(
                    children: [
                      Image.asset(
                        "sc_images/index/sc_icon_first_recharge_tag.webp",
                        height: 70.w,
                      ),
                      Transform.translate(
                        offset: Offset(0, -10),
                        child: Container(
                          height: 23.w,
                          width: 100.w,
                          alignment: AlignmentDirectional.center,
                          decoration: BoxDecoration(
                            image: DecorationImage(
                              image: AssetImage(
                                "sc_images/index/sc_icon_first_recharge_btn.png",
                              ),
                              fit: BoxFit.fill,
                            ),
                          ),
                          child: CountdownTimer(
                            expiryDate: DateTime.fromMillisecondsSinceEpoch(
                              AccountStorage()
                                      .getCurrentUser()
                                      ?.userProfile
                                      ?.firstRechargeEndTime ??
                                  0,
                            ),
                            color: Colors.white,
                          ),
                        ),
                      ),
                    ],
                  ),
                  onTap: () {
                    strategy.onFirstRechargeTap(context);
                  },
                ),
              );
            }
            return Container();
          },
        ),
      ],
    );
  }
}