import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:get/get.dart';
import 'package:hgdj/hj_page/short_video/short_main_video_page.dart';
import 'package:hgdj/tools_base/widget/lazy_indexed_stack.dart';

import '../../alert/vip_guide/guide_push_banner.dart';
import '../../config/config.dart';
import '../../main.dart';
import '../ai/ai_home_page.dart';
import '../community/community_main_page_page/community_main_page.dart';
import '../home/dark_home_page.dart';
import '../home/home_main_page.dart';
import '../home/widget/home_txt_marquee.dart';
import '../mine/home_mine_page.dart';
import 'drama_tip_bubble.dart';
import 'main_logic.dart';
import 'main_tabbar.dart';

class MainPage extends StatefulWidget {
  static const routeName = '/MainPage';

  const MainPage({super.key});

  @override
  State<MainPage> createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> with RouteAware {
  // 懒加载：MainPage 可能在 binding 未跑时就被构造，
  // 用 getter 让 logic 只在 build 访问时才 Get.find，避免构造期 not found 崩溃
  MainPageLogic get logic => Get.find<MainPageLogic>();

  @override
  void initState() {
    super.initState();
    GuidePushBanner.start(); //进 app 满3分钟后开始推 VIP「特享内容」横幅
    DramaTipBubble.start(); //「AI爽剧来袭」引导气泡，装机维度只亮一次
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    final route = ModalRoute.of(context);
    if (route != null) routeObserver.subscribe(this, route);
  }

  /// 二级页面/弹窗关闭回到本页：满3分钟后每次都拉一次「特享内容」，有数据就弹横幅
  @override
  void didPopNext() {
    super.didPopNext();
    GuidePushBanner.onBackToMainPage();
  }

  @override
  void dispose() {
    routeObserver.unsubscribe(this);
    GuidePushBanner.stop(); //退登/重进流程销毁本页时，别留着定时任务空跑
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return PopScope(
      canPop: false,
      onPopInvokedWithResult: (didPop, _) {
        if (didPop) return;
        if (logic.confirmExit()) SystemNavigator.pop();
      },
      child: Scaffold(
        resizeToAvoidBottomInset: false,
        body: Column(
          children: [
            Expanded(
              child: Stack(
                fit: StackFit.expand,
                children: [
                  _buildPages(),
                  //引导气泡贴着底栏上沿，尾巴指短剧 tab
                  const Positioned(
                      left: 0, right: 0, bottom: 0, child: DramaTipBubble()),
                ],
              ),
            ),
            const MainPageTabbar(),
          ],
        ),
      ),
    );
  }

  Widget _buildPages() {
    return Obx(() {
      final cur = logic.curPageIndex.value;
      return LazyIndexedStack(
        index: cur,
        children: [
          // 主页
          Stack(
            fit: StackFit.expand,
            children: [
              const HomeMainPage(),
              _bottomMarquee(),
            ],
          ),
          // 短视频
          Obx(() => ShortVideoMainPage(index: logic.shortIndex.value)),
          // 暗网
          if (Config.darkWebEnable)
            Obx(() => DarkHomePage(defaultId: logic.darkInitTabId.value)),
          // AI
          const AiHomePage(),
          // 社区
          Stack(
            children: [
              Obx(
                () => CommunityMainPage(
                  index: logic.communityIndex.value,
                  subTabIndex: logic.communitySubIndex.value,
                ),
              ),
              _bottomMarquee(),
            ],
          ),
          // 我的（IndexedStack 天然保活，不需要 keepAlive）
          const HomeMinePage(),
        ],
      );
    });
  }

  /// 首页/社区底部的文字跑马灯
  Widget _bottomMarquee() {
    return Positioned(
      bottom: 0,
      left: 0,
      right: 0,
      child: HomeTxtMarQuee(typeValue: 1),
    );
  }
}