import {
  _decorator,
  Component,
  Node,
  instantiate,
  Label,
  Sprite,
  UITransform,
  ScrollView,
} from "cc";
import li_BaseView from "db://assets/Scripts/Main/Common/li_BaseView";
import Utils from "db://assets/Scripts/Main/Common/Utils";
import { GButton } from "db://assets/Scripts/Main/Common/GButton";
import ResManager from "db://assets/Scripts/Main/Manager/ResManager";
import { ThemeItem } from "../../uiitems/ThemeItem";
import {
  NavigationManager,
  PageTransitionType,
  PanelType,
} from "../../manager/NavigationManager";
import LanguageUtils from "../../../Main/Common/LanguageUtils";
import { InnerMsgCode } from "../../../Main/Config/InnerMsgCode";
import { ThemeService } from "db://assets/Scripts/chat18x/network/services/ThemeService";
import { GirlService } from "db://assets/Scripts/chat18x/network/services/GirlService";
import { ShopService } from "db://assets/Scripts/chat18x/network/services/ShopService";
import { DataManager, DataId } from "../../data/DataManager";
import { ThemeData } from "../../data/ThemeData";
import { GirlData } from "../../data/GirlData";
import { WalletData } from "../../data/WalletData";
import { AccountData } from "../../data/AccountData";
import { ShopData } from "../../data/ShopData";
import { EnvData } from "../../data/EnvData";
import proto from "db://assets/Scripts/proto/proto.pb.js";
import { MainController } from "../../core/MainController";
import { logger } from "db://assets/Scripts/Main/Common/Logger";
import { RecomandItem } from "../../uiitems/RecomandItem";
import HXZ_ScrollViewList from "db://assets/Scripts/Main/Common/ScrollViewList";
import ScrollViewListItem from "db://assets/Scripts/Main/Common/ScrollviewListItem";

const { ccclass, property } = _decorator;

@ccclass("ThemePanel")
export class ThemePanel extends li_BaseView {
  private _nodeTab: any = {};

  coinNum: Label;

  itemInst: ThemeItem;
  recItemInst: RecomandItem;

  themeContent: Node;
  recGirlContent: Node;
  private vipLeftTime: Label;
  //recName: Label;
  //recSprite: Sprite;

  cache: ThemeItem[] = [];

  // 不再需要手动管理 recItemCache
  // recItemCache: RecomandItem[] = [];

  // 虚拟列表组件
  private scrollViewList: HXZ_ScrollViewList = null;

  // 子页面管理

  // 加载状态保护
  private isLoading: boolean = false;
  private loadingPromise: Promise<void> | null = null;
  private abortController: AbortController | null = null;

  private recomandListBtn: Node;
  private moreThemeBtn: Node;

  private themeScroll: Node;
  private recomandScroll: Node;
  private recomandScrollView: ScrollView = null;

  // 推荐列表分页状态
  private currentPage: number = 1;
  private pageLimit: number = 10;
  private isLoadingMore: boolean = false;
  private hasMoreData: boolean = true;

  // 记录上次触发加载的 ID，避免重复触发
  private lastLoadTriggerId: number = -1;

  onLoadCT() {
    Utils.parseNode(this.node, this._nodeTab);

    this.coinNum = this._nodeTab.coinNum.getComponent(Label);
    //this.recName = this._nodeTab.characterNameText.getComponent(Label);
    //this.recSprite = this._nodeTab.recPic.getComponent(Sprite);
    this.vipLeftTime = this._nodeTab.vipText.getComponent(Label);

    this.recomandListBtn = this._nodeTab.recomandList;
    this.moreThemeBtn = this._nodeTab.moreTheme;
    this.themeScroll = this._nodeTab.themeScroll;
    this.recomandScroll = this._nodeTab.recomandScroll;

    // 获取推荐列表的 ScrollView 组件
    if (this.recomandScroll) {
      this.recomandScrollView =
        this.recomandScroll.getComponentInChildren(ScrollView);

      // 获取虚拟列表组件（需要在场景中手动添加 HXZ_ScrollViewList 组件）
      this.scrollViewList =
        this.recomandScroll.getComponentInChildren(HXZ_ScrollViewList);
      if (!this.scrollViewList) {
        logger.warn(
          "[ThemePanel] recomandScroll 节点缺少 HXZ_ScrollViewList 组件，请在编辑器中添加"
        );
      }
    }

    this.registerListener();
    this.itemInst = this._nodeTab.ThemeItem.getComponent(ThemeItem);
    this.itemInst.node.active = false;

    this.recItemInst = this._nodeTab.recItem.getComponent(RecomandItem);
    // 虚拟列表会自动管理模板节点的显隐，但保留兼容性代码
    this.recItemInst.node.active = false;

    this.themeContent = this._nodeTab.allThemecontent;
    this.recGirlContent = this._nodeTab.allRecGirlContent;

    this.Show();
  }

  async Show(forceRefresh: boolean = false) {
    // 防止重复加载
    if (this.isLoading) {
      logger.log("[ThemePanel] 已在加载中，等待当前加载完成");
      if (this.loadingPromise) {
        await this.loadingPromise;
      }
      return;
    }

    this.isLoading = true;
    this.loadingPromise = this._refreshDataInternal(forceRefresh);

    try {
      await this.loadingPromise;
    } finally {
      this.isLoading = false;
      this.loadingPromise = null;
    }

    this.openRecomandList();
  }

  private async _refreshDataInternal(forceRefresh: boolean = false) {
    // 创建新的AbortController用于取消操作
    this.abortController = new AbortController();
    const signal = this.abortController.signal;

    try {
      this._nodeTab.loadingRec.active = true;
      //some temp data
      this.refreshCoinNum();
      this.refreshVipExpire();
      const accountData = DataManager.I.getDataById<AccountData>(
        DataId.Account
      );
      //this.uid.string = "uid: " + accountData.accId;

      // 检查是否已被取消
      if (signal.aborted) {
        throw new Error("Operation was aborted");
      }

      // 清理旧的cache节点（每次都清理，解决内存泄漏问题）
      this.clearCache();

      // 如果需要强制刷新，先刷新数据
      if (forceRefresh) {
        logger.log("[ThemePanel] 开始强制刷新数据");
        await Promise.all([
          MainController.I.refreshThemeData(),
          MainController.I.refreshRecommendList(),
        ]);
        logger.log("[ThemePanel] 数据刷新完成");

        // 再次检查是否已被取消
        if (signal.aborted) {
          throw new Error("Operation was aborted");
        }
      }

      // 优先使用MainController中预加载的数据
      const preloadStatus = MainController.I.getPreloadStatus();
      logger.log("[ThemePanel] 预加载状态:", preloadStatus);

      // 处理主题数据
      await this.handleThemeData(preloadStatus.themeData);

      // 检查是否已被取消
      if (signal.aborted) {
        throw new Error("Operation was aborted");
      }

      // 处理推荐列表数据
      await this.handleRecommendData(preloadStatus.recommendList);

      // 检查是否已被取消
      if (signal.aborted) {
        throw new Error("Operation was aborted");
      }

      this._nodeTab.loadingRec.active = false;

      // 处理商品列表数据
      await this.handleShopListData(preloadStatus.shopList);
    } catch (error) {
      logger.error("[ThemePanel] Show操作出错:", error);
      this._nodeTab.loadingRec.active = false;

      // 如果不是取消操作导致的错误，可以考虑显示错误提示
      if (error.message !== "Operation was aborted") {
        // 这里可以添加错误提示逻辑
        logger.error("[ThemePanel] 数据加载失败，请稍后重试");
      }
    } finally {
      this.abortController = null;
    }
  }

  /**
   * 处理主题数据
   */
  private async handleThemeData(isPreloaded: boolean): Promise<void> {
    if (isPreloaded) {
      logger.log("[ThemePanel] 使用预加载的主题数据");
      // 直接使用预加载的数据渲染界面
      const themeData = DataManager.I.getDataById<ThemeData>(DataId.Theme);
      if (themeData && themeData.themes) {
        return;
      }
    }

    // 如果没有预加载数据，则请求数据
    logger.log("[ThemePanel] 请求主题数据");
    const reqData = {};
    let res = await ThemeService.I.reqHallTheme(reqData);
    if (res && res.code === proto.cs.EnmRetCode.SUCCESS) {
      // 保存数据
      const themeData = DataManager.I.getDataById<ThemeData>(DataId.Theme);
      themeData.themes = res.data;
    }
  }

  /**
   * 渲染主题数据
   */
  private renderThemeData(): void {
    if (this.cache.length > 0) return;

    const themeData = DataManager.I.getDataById<ThemeData>(DataId.Theme);
    const themeIds = themeData.themeIds;
    for (let id of themeIds) {
      let newNode = instantiate(this.itemInst.node);
      let item = newNode.getComponent(ThemeItem);
      item.refresh(id, this.node);
      newNode.active = true;
      this.cache.push(item);
      this.themeContent.addChild(newNode);
    }
  }

  /**
   * 虚拟列表渲染回调
   * 该方法需要在 Cocos Creator 编辑器中配置到 HXZ_ScrollViewList 的 renderEvent
   * @param itemNode 虚拟列表传入的节点
   * @param index 数据索引
   */
  onRenderRecommendItem(itemNode: Node, index: number): void {
    const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
    const girlIDs = girlData.getRecommendListIds();

    if (index < girlIDs.length) {
      const girlId = girlIDs[index];
      const item = itemNode.getComponent(RecomandItem);

      if (!item) {
        logger.error(
          `[ThemePanel] 节点缺少 RecomandItem 组件，index: ${index}`
        );
        return;
      }

      // 确保节点已初始化
      if (!item._initialized) {
        item.init();
      }

      // 刷新数据
      item.refresh(girlId);
      itemNode.active = true;
    }
  }

  /**
   * 处理推荐数据
   */
  private async handleRecommendData(isPreloaded: boolean): Promise<void> {
    if (isPreloaded) {
      logger.log("[ThemePanel] 使用预加载的推荐列表数据");
      // 直接使用预加载的数据渲染界面
      const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
      if (girlData) {
        return;
      }
    }

    // 如果没有预加载数据，则请求数据
    logger.log("[ThemePanel] 请求推荐列表数据");
    const reqData = {
      page: 1,
      limit: 10,
    };
    let res = await GirlService.I.reqRecommendList(reqData);
    if (res && res.code === proto.cs.EnmRetCode.SUCCESS) {
      const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
      girlData.setRecommendList(res.data);
    }
  }

  /**
   * 渲染推荐列表数据（首次渲染）
   * 【已废弃】使用虚拟列表后，不再需要手动渲染，通过 numItems 触发自动渲染
   */
  private renderRecommendData_DEPRECATED(): void {
    // 该方法已被虚拟列表的自动渲染机制替代
    // 保留此方法仅用于参考，实际不再调用
  }

  /**
   * 滚动到底部回调（已废弃）
   * 该方法不再使用，改用 onRecommendScrolling() 中的滚动偏移量检测
   * scroll-to-bottom 事件触发不稳定，改为在 scrolling 事件中检测距离底部的距离
   */
  private onRecommendScrollToBottom_DEPRECATED(): void {
    logger.log("[ThemePanel] 推荐列表滚动到底部");
    this.loadMoreRecommendData();
  }

  /**
   * 滚动中回调，基于虚拟列表 displayData 检测并触发分页加载
   * 当显示到接近已加载数据末尾时（倒数第3个），自动加载下一页
   */
  private onRecommendScrolling(): void {
    if (!this.scrollViewList) return;

    // 获取虚拟列表的 displayData 和总数
    const displayData = this.scrollViewList.displayData;
    const numItems = this.scrollViewList.numItems;

    // 检查数据有效性
    if (!displayData || displayData.length === 0 || numItems === 0) return;

    // 获取当前显示的最后一个 item 的 ID
    const lastDisplayedId = displayData[displayData.length - 1].id;

    // 调试日志（显示当前滚动状态）
    const firstDisplayedId = displayData[0].id;
    logger.log(
      `[滚动] 显示范围: ID ${firstDisplayedId}-${lastDisplayedId}, 总数: ${numItems}, 已加载页: ${this.currentPage}`
    );

    // 触发条件：显示到倒数第 3 个 item 时开始加载下一页
    // 例如：总数 10，显示到 ID=7 时触发（10-3=7）
    //      总数 20，显示到 ID=17 时触发（20-3=17）
    const threshold = numItems - 3;

    if (lastDisplayedId >= threshold && lastDisplayedId > this.lastLoadTriggerId) {
      logger.log(
        `[ThemePanel] 接近末尾 (${lastDisplayedId}/${numItems})，触发加载第 ${
          this.currentPage + 1
        } 页`
      );

      // 记录本次触发的 ID，避免重复触发
      this.lastLoadTriggerId = lastDisplayedId;

      // 触发分页加载
      this.loadMoreRecommendData();
    }
  }

  /**
   * 加载下一页推荐数据
   */
  private async loadMoreRecommendData(): Promise<void> {
    // 防止重复加载
    if (this.isLoadingMore) {
      logger.log("[ThemePanel] 正在加载中，跳过");
      return;
    }

    // 检查是否还有更多数据
    if (!this.hasMoreData) {
      logger.log("[ThemePanel] 没有更多数据了");
      return;
    }

    try {
      this.isLoadingMore = true;
      this.currentPage++;

      logger.log(`[ThemePanel] 开始加载第 ${this.currentPage} 页推荐数据`);

      const reqData = {
        page: this.currentPage,
        limit: this.pageLimit,
      };

      const res = await GirlService.I.reqRecommendList(reqData);

      if (res && res.code === proto.cs.EnmRetCode.SUCCESS) {
        const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);

        // 追加数据到 GirlData
        girlData.addRecommendList(res.data);

        // 检查是否还有更多数据
        const girls = res.data.girls || [];
        if (girls.length < this.pageLimit) {
          this.hasMoreData = false;
          logger.log("[ThemePanel] 已加载所有推荐数据");
        }

        // 使用虚拟列表：更新总数量，自动触发渲染
        if (this.scrollViewList) {
          const allGirlIDs = girlData.getRecommendListIds();
          this.scrollViewList.numItems = allGirlIDs.length;
          logger.log(
            `[ThemePanel] 第 ${this.currentPage} 页加载完成，新增 ${girls.length} 项，总计 ${allGirlIDs.length} 项`
          );
        } else {
          logger.warn("[ThemePanel] scrollViewList 未初始化，无法更新列表");
        }
      } else {
        logger.warn("[ThemePanel] 加载下一页推荐数据失败:", res);
        // 加载失败，回退页码
        this.currentPage--;
      }
    } catch (error) {
      logger.error("[ThemePanel] 加载下一页推荐数据异常:", error);
      // 加载失败，回退页码
      this.currentPage--;
    } finally {
      this.isLoadingMore = false;
    }
  }

  /**
   * 渲染新增的推荐数据
   * 【已废弃】使用虚拟列表后，通过更新 numItems 自动触发渲染
   * @param newCount 新增数据的数量
   */
  private renderMoreRecommendData_DEPRECATED(newCount: number): void {
    // 该方法已被虚拟列表的自动渲染机制替代
    // 保留此方法仅用于参考，实际不再调用
  }

  /**
   * 处理商品列表数据
   */
  private async handleShopListData(isPreloaded: boolean): Promise<void> {
    if (isPreloaded) {
      logger.log("[ThemePanel] 商品列表数据已预加载");
      // 数据已经在DataManager中，不需要额外处理
      return;
    }

    // 如果没有预加载数据，则请求数据
    logger.log("[ThemePanel] 请求商品列表数据");
    await this.reqShopList();
  }

  private registerListener() {
    GButton.BandClick(this._nodeTab.ShopPanelEntry, this.enterShop, this);

    GButton.BandClick(this.recomandListBtn, this.openRecomandList, this);
    GButton.BandClick(this.moreThemeBtn, this.openMoreTheme, this);

    // 注册推荐列表滚动事件（延迟到下一帧，确保虚拟列表已初始化）
    this.scheduleOnce(() => {
      if (this.scrollViewList) {
        // 只监听 scrolling 事件，通过滚动偏移量检测是否接近底部
        this.scrollViewList.node.on("scrolling", this.onRecommendScrolling, this);
        logger.log("[ThemePanel] 虚拟列表滚动事件已绑定");
      } else {
        logger.warn(
          "[ThemePanel] 无法绑定滚动事件，scrollViewList 未初始化"
        );
      }
    }, 0.1);

    Utils.addInnerEL(InnerMsgCode.LanguageChange, this, this.onLanguageChange);
    Utils.addInnerEL(InnerMsgCode.BalanceChange, this, this.onBalanceChange);
    Utils.addInnerEL(
      InnerMsgCode.VipExpireChange,
      this,
      this.onVipExpireChange
    );
  }

  enterShop() {
    NavigationManager.Instance.openPopupPanel("PurchasePanel");
  }

  openRecomandList() {
    this.themeScroll.active = false;
    this.recomandScroll.active = true;

    // 使用虚拟列表：设置数据总量，自动触发渲染
    if (this.scrollViewList) {
      const girlData = DataManager.I.getDataById<GirlData>(DataId.Girl);
      const girlIDs = girlData.getRecommendListIds();

      // 重置分页状态（仅在首次打开时）
      if (this.scrollViewList.numItems === 0) {
        this.currentPage = 1;
        this.hasMoreData = true;
        this.isLoadingMore = false;
      }

      this.scrollViewList.numItems = girlIDs.length;
      logger.log(`[ThemePanel] 打开推荐列表，共 ${girlIDs.length} 项`);
    } else {
      logger.warn("[ThemePanel] scrollViewList 未初始化");
    }

    this.updateTagState(true);
  }
  openMoreTheme() {
    this.themeScroll.active = true;
    this.recomandScroll.active = false;

    //todo：是否需要刷新数据

    this.renderThemeData();

    this.updateTagState(false);
  }

  updateTagState(isRecomnend: boolean) {
    this.recomandListBtn.children[0].active = !isRecomnend;
    this.recomandListBtn.children[1].active = isRecomnend;

    this.moreThemeBtn.children[0].active = isRecomnend;
    this.moreThemeBtn.children[1].active = !isRecomnend;
  }

  // 刷新余额
  private refreshCoinNum() {
    const walletData = DataManager.I.getDataById<WalletData>(DataId.Wallet);
    const balance = walletData.getOriginalBalance();
    this.coinNum.string = balance.toString();
  }

  // 刷新 vip失效时间戳
  private refreshVipExpire() {
    const walletData = DataManager.I.getDataById<WalletData>(DataId.Wallet);

    if (!walletData.isVip) {
      //this.vipLeftTime.string = LanguageUtils.getText("purchasepanel.notvip");
      this._nodeTab.notvipicon.active = true;
      this._nodeTab.notVip.active = true;
      this.vipLeftTime.node.active = false;
    } else {
      const vipExpire = walletData.vipExpire;

      const leftTime = Utils.formatVipLeftTime(vipExpire);
      this.vipLeftTime.node.active = true;

      this._nodeTab.notvipicon.active = false;
      this._nodeTab.notVip.active = false;

      if (leftTime == null) {
        LanguageUtils.getText("purchasepanel.notvip");
      } else {
        this.vipLeftTime.string = leftTime;
      }
    }
  }

  // 获取商品列表
  async reqShopList() {
    // 请求购买商品
    const reqData = {};
    let res = await ShopService.I.reqShopList(reqData);
    if (res && res.code === proto.cs.EnmRetCode.SUCCESS) {
      const resData = res.data;
      // 保存数据
      const shopData = DataManager.I.getDataById<ShopData>(DataId.Shop);
      shopData.goods = res.data;
    }
  }

  /**
   * 清理缓存节点
   */
  private clearCache(): void {
    // 清理主题缓存
    if (this.cache && this.cache.length > 0) {
      logger.log(`[ThemePanel] 清理 ${this.cache.length} 个主题缓存节点`);
      for (let i = this.cache.length - 1; i >= 0; i--) {
        if (this.cache[i] && this.cache[i].node && this.cache[i].node.isValid) {
          this.cache[i].node.destroy();
        }
      }
      this.cache = [];
    }

    // 虚拟列表自动管理对象池，只需重置数量
    if (this.scrollViewList) {
      this.scrollViewList.numItems = 0;
      logger.log("[ThemePanel] 重置虚拟列表项数量");
    }

    // 重置推荐列表分页状态
    this.currentPage = 1;
    this.hasMoreData = true;
    this.isLoadingMore = false;

    // 重置触发记录
    this.lastLoadTriggerId = -1;
  }

  /**
   * 页面被隐藏时调用
   */
  public onHide(): void {
    logger.log("[ThemePanel] onHide called");
    this.cancelCurrentOperation();
  }

  /**
   * 取消当前操作
   */
  private cancelCurrentOperation(): void {
    if (this.abortController) {
      logger.log("[ThemePanel] 取消当前操作");
      this.abortController.abort();
      this.abortController = null;
    }
  }

  onDestroy(): void {
    logger.log("[ThemePanel] onDestroy called");

    // 取消当前操作
    this.cancelCurrentOperation();

    // 清理缓存
    this.clearCache();

    // 重置加载状态
    this.isLoading = false;
    this.loadingPromise = null;

    // 移除虚拟列表滚动事件监听
    if (this.scrollViewList) {
      this.scrollViewList.node.off("scrolling", this.onRecommendScrolling, this);
      logger.log("[ThemePanel] 虚拟列表滚动事件已移除");
    }

    // 移除事件监听器（修复回调函数引用问题）
    Utils.removeInnerEL(
      InnerMsgCode.LanguageChange,
      this,
      this.onLanguageChange
    );
    Utils.removeInnerEL(InnerMsgCode.BalanceChange, this, this.onBalanceChange);
    Utils.removeInnerEL(
      InnerMsgCode.VipExpireChange,
      this,
      this.onVipExpireChange
    );
  }

  // 事件回调函数（避免匿名函数导致的内存泄漏）
  private onLanguageChange = () => {
    //this.recName.string = LanguageUtils.getText(this.rectNameKey);
    this.refreshVipExpire();
  };

  private onBalanceChange = () => {
    this.refreshCoinNum();
  };

  private onVipExpireChange = () => {
    this.refreshVipExpire();
  };
}