import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:hgdj/hj_model/splash/ads_model.dart';
import 'package:hgdj/hj_page/main_page/provider/msg_provider.dart';
import 'package:hgdj/hj_page/pre_sale/pre_sale_provider.dart';
import 'package:hgdj/alert/vip_guide/guide_manager.dart';
import 'package:hgdj/alert/vip_guide/timed_popup_manager.dart';
import 'package:hgdj/tools_base/ad_manager.dart';

import '../../alert/splash/notice_image_dialog.dart';
import '../../alert/splash/notice_text_dialog.dart';
import '../../alert/vip_guide/guide_bottom_sheet.dart';
import '../../alert/vip_guide/guide_home_dialog.dart';
import '../../config/config.dart';
import '../../hj_model/home/plate_model.dart';
import '../../tools_base/debug_log.dart';
import '../../tools_base/module_sort_manager.dart';
import '../main_page/main_logic.dart';
import '../mine/mine_vip/mine_charge_vip_page.dart';
import '../mine/mine_vip/pay_order_source.dart';
import '../mine/widgets/gradient_text.dart';
import '../pre_sale/limit_time_provider.dart';

class HomeMainLogic extends GetxController {
  final bool isDarkStyle;
  final String? darkDefaultId; // 暗网跳转到指定的tab使用
  HomeMainLogic({
    this.isDarkStyle = false,
    this.darkDefaultId,
  });

  //开屏弹窗链每次启动只跑一次
  static bool _adShown = false;

  bool isLoading = true;
  int tabViewKey = 0; //排序变了就 +1 换掉 HomeTabView 的 key，强制重建 TabController
  int _initIndex = 0; // 注意⚠️:暗网进入,有可能通过内链指定亚模块进入,index通过defaultId 处理

  //合并本地排序后的 tab 列表，_loadTabs 里算一次
  List<ModuleData> tabs = [];

  final scaffoldKey = GlobalKey<ScaffoldState>();

  //tabCtr 由 HomeTabView 在自身 vsync 下创建并 dispose,这里只持引用驱动 tab 切换;排序时置 null 触发重建
  TabController? tabCtr;

  String get _sortKey => "_localSortKey_Tab_ID_cache_$isDarkStyle";

  int get selectedTabIndex => tabCtr?.index ?? _initIndex;

  //服务端下发的原始顺序(抽屉「恢复默认」用)
  List<ModuleData> get defaultList {
    if (isDarkStyle) return Config.plateModule?.deepWeb ?? [];
    // 固定最新模块
    return [
      ModuleData(id: "-110", moduleName: "最新", type: 1, showType: 1),
      ...?Config.plateModule?.homePage,
    ];
  }

  @override
  void onInit() {
    super.onInit();
    _loadTabs();
    WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
      limitTimeProvider.refresh(); //获取限时活动(放首帧后,避免 build 中 notifyListeners)
      _showAdChain();
    });
  }

  void openEndDrawer() => scaffoldKey.currentState?.openEndDrawer();

  void gotoTabId(String tagDataId) {
    final index = tabs.indexWhere((e) => e.id == tagDataId);
    if (index >= 0) tabCtr?.index = index;
  }

  /// 应用抽屉里的新排序：顺序没变只切 tab，变了就落盘并换 key 重建 TabView
  Future<void> resortTabs(List<ModuleData> dataArr, ModuleData? tagData) async {
    final curTagData = tagData ?? tabs[selectedTabIndex];
    bool isSameArr = true;
    int selectIndex = 0;
    //抽屉只重排不增删，长度必然一致；逐项比名字，顺带定位选中项的新位置
    if (dataArr.length == tabs.length) {
      for (int i = 0; i < dataArr.length; i++) {
        if (dataArr[i].moduleName != tabs[i].moduleName) isSameArr = false;
        if (dataArr[i].moduleName == curTagData.moduleName) selectIndex = i;
      }
    }
    if (isSameArr) {
      tabCtr?.index = selectIndex;
      return;
    }
    await ModuleSortManager().saveLocalData(dataArr, _sortKey);
    tabViewKey++;
    tabs = dataArr;
    _initIndex = selectIndex;
    tabCtr = null; //旧 State 即将销毁，先断引用，由新 State 重新赋值
    update();
  }

  //合并本地排序与服务端 tab，顺带算好初始选中的 index
  Future<void> _loadTabs() async {
    try {
      tabs = await ModuleSortManager().mergeLocalSortWithServer(
        serverTabs: defaultList,
        key: _sortKey,
      );
      if (darkDefaultId?.isNotEmpty == true) {
        // 初始化指定模块(一般暗网模块用)
        final index = tabs.indexWhere((e) => e.id == darkDefaultId);
        if (index >= 0) _initIndex = index;
      } else if (!isDarkStyle) {
        //默认不显示最新模块，选中「热门」(index 1)；但 tab 不足 2 个时回退到 0，避免越界
        _initIndex = (tabs.first.moduleName == "最新" && tabs.length > 1) ? 1 : 0;
      }
    } catch (e) {
      debugLog(e);
    }
    isLoading = false;
    update();
  }

  /// 首页开屏弹窗链：图片公告 → 文字公告 → 预售 → 支付分层 → VIP 引导。
  /// 逐个 await 串行弹，每次启动只跑一次。
  /// 九宫格应用广告不在这里：它跟着启动落地页弹，见 MainPageLogic.onReady
  Future<void> _showAdChain() async {
    if (_adShown) return;
    _adShown = true;
    await MainPageLogic.appDialogFuture; //等落地页的九宫格弹窗关掉再接着弹，避免叠在一起
    if (AdManager().showAbTestAd) {
      await _showImageDialog(); //图片公告
      await _showWordDialog(); //文字公告
    }

    await PreSaleProvider().showAlert(); //预售弹窗
    await _showPayDialog(); //支付分层首页弹窗
    await _showVipGuide(); //首页吸底 VIP 引导(全链优先级最后)
  }

  /// 支付分层首页弹窗：有 homePage 图就弹，倒计时由 lastDiscountTime 自行判断。
  /// 点海报跳会员中心，这里 await 到用户从会员页返回，否则链条后面的吸底引导会弹在会员页上
  Future<void> _showPayDialog() async {
    final config = MineMsgProvider().payTier?.config;
    if (config == null || (config.homePage ?? '').isEmpty) return;
    final goVip = await Get.dialog<bool>(GuideHomeDialog(config: config));
    if (goVip != true) return;
    await Get.to(() => MineChargeVipPage(
        vipID: config.vipCard, sourcePage: PaySourcePage.homeUserSegment));
  }

  /// 首页吸底 VIP 引导：开屏弹窗链末尾弹(全链最低优先级)，能不能弹由 HOME_NEW_USER / HOME_OLD_USER
  /// 两个场景开关决定(后端按分层下发，最多命中一个)；文案优先用下发的，没配走默认。
  /// 走 TimedPopupManager 与其它引导共用互斥；每次启动只弹一次(_showAdChain 由静态 _adShown 保证)。
  Future<void> _showVipGuide() async {
    final scene = GuideManager().homeScene;
    if (scene == null) return;
    final config = GuideManager().configOf(scene);
    await TimedPopupManager().trigger(
      canShow: () => GuideManager().canShow(scene),
      onShow: () => GuideBottomSheet.show(
        scene: scene,
        title: Text(
          config?.title?.isNotEmpty == true ? config!.title! : 'VIP影片免费试看',
          style: const TextStyle(
              color: Colors.white, fontSize: 19, fontWeight: FontWeight.w600),
        ),
        subtitle: GradientText(
          config?.description?.isNotEmpty == true
              ? config!.description!
              : '开通会员 查看完整影片',
          gradient:
              const LinearGradient(colors: [Colors.white, Color(0xffEFD394)]),
          style: const TextStyle(
              color: Colors.white, fontSize: 15, fontWeight: FontWeight.w500),
        ),
      ),
    );
  }

  ///显示图片公告(上下双排，每次弹两张)
  Future<void> _showImageDialog() async {
    final adsList = AdManager().adsByType(46);
    for (int i = 0; i < adsList.length; i += 2) {
      await Get.dialog(
          SystemImagesDialog(ads: adsList.skip(i).take(2).toList()));
    }
  }

  //文字公告
  Future<void> _showWordDialog() async {
    for (final wordBean in AdManager().announceList) {
      await Get.dialog(
        wordBean.type == 0
            ? NoticeTextDialog(
                content: wordBean.content.toString(), wordBean: wordBean)
            : NoticeImageDialog(
                model:
                    AdsInfoModel(cover: wordBean.cover, href: wordBean.href)),
      );
    }
  }
}