import {
  _decorator,
  Component,
  Node,
  Label,
  Sprite,
  UITransform,
  ScrollView,
  Button,
} from "cc";
import {
  ChatHistoryManager,
  ChatMessage,
} from "../../manager/ChatHistoryManager";
import li_BaseView from "db://assets/Scripts/Main/Common/li_BaseView";
import Utils from "db://assets/Scripts/Main/Common/Utils";
import { ChatContentsLayout } from "../components/ChatContentsLayout";
import { ViewManager } from "db://assets/Scripts/Main/Manager/ViewManager";
import GameRootUI from "db://assets/Scripts/Main/Common/GameRootUI";
import ResManager from "db://assets/Scripts/Main/Manager/ResManager";
import { ConfigManager } from "../../manager/ConfigManager";
import LanguageUtils from "../../../Main/Common/LanguageUtils";
import { Dialog } from "../../data/DialogData";
import { InnerMsgCode } from "../../../Main/Config/InnerMsgCode";
import { logger } from "db://assets/Scripts/Main/Common/Logger";
import { NavigationManager } from "../../manager/NavigationManager";

const { ccclass, property } = _decorator;

@ccclass("RecordPanel")
export class RecordPanel extends li_BaseView {
  @property(Label)
  girlName: Label = null;

  @property(Sprite)
  girlImg: Sprite = null;

  @property(ChatContentsLayout)
  layout: ChatContentsLayout = null;

  @property(ScrollView)
  scrollView: ScrollView = null;

  @property(Button)
  loadMoreBtn: Button = null;

  @property(Label)
  loadMoreLabel: Label = null;

  id: number;
  private _nodeTab: any = {};
  nameKey: string;

  // 分页相关
  private currentPage: number = 0;
  private pageSize: number = 20;
  private allMessages: ChatMessage[] = [];
  private displayedMessages: Dialog[] = [];

  private onLanguageChangeCallback = () => {
    if (!this.girlName) return;
    this.girlName.string = LanguageUtils.getText(this.nameKey);
  };

  openUIDataCT(data) {
    this.id = data;
  }

  onLoadCT() {
    Utils.parseNode(this.node, this._nodeTab);
    this.register();
    this.refresh(this.id);
    this.initLoadMoreBtn();
    this.loadChatHistory();
  }

  register() {
    // 注册语言变化监听
    Utils.addInnerEL(
      InnerMsgCode.LanguageChange,
      this,
      this.onLanguageChangeCallback
    );
  }

  onDestroy(): void {
    Utils.removeInnerEL(
      InnerMsgCode.LanguageChange,
      this,
      this.onLanguageChangeCallback
    );
  }

  /**
   * 初始化加载更多按钮
   */
  private initLoadMoreBtn() {
    if (this.loadMoreBtn) {
      this.loadMoreBtn.node.on(Button.EventType.CLICK, this.onLoadMore, this);
    }
    this.updateLoadMoreBtn();
  }

  refresh(id: number) {
    this.id = id;
    const data = ConfigManager.tables.TbGirls.get(this.id);
    const dataDetail = ConfigManager.tables.TbGirlsDetail.get(this.id);
    if (!data) return;

    this.nameKey = data.nameKey;
    this.girlName.string = LanguageUtils.getText(data.nameKey);

    // 设置角色头像
    ResManager.I.changeBundleSpriteFrame(
      this.girlImg,
      data.avatarPath,
      "Chat18x",
      () => {
        let sizeTran = this.girlImg.node.parent.getComponent(UITransform);
        Utils.adjustBgPixelRatioToSize(
          sizeTran.contentSize,
          this.girlImg.node,
          2
        );
      }
    );
  }

  /**
   * 加载聊天历史记录并显示
   */
  private loadChatHistory() {
    // 从ChatHistoryManager获取历史记录
    this.allMessages = ChatHistoryManager.Instance.loadHistory(this.id);

    if (this.allMessages.length === 0) {
      logger.log(`No chat history found for role ${this.id}`);
      this.updateLoadMoreBtn();
      return;
    }

    // 倒序排列消息（最新的在前）
    this.allMessages.reverse();

    // 重置分页
    this.currentPage = 0;
    this.displayedMessages = [];

    // 加载第一页
    this.loadMoreMessages();
  }

  /**
   * 加载更多消息
   */
  private loadMoreMessages() {
    const startIndex = this.currentPage * this.pageSize;
    const endIndex = Math.min(
      startIndex + this.pageSize,
      this.allMessages.length
    );

    // 获取当前页的消息
    const pageMessages = this.allMessages.slice(startIndex, endIndex);

    // 将ChatMessage转换为Dialog格式并添加到显示列表
    const newDialogs: Dialog[] = pageMessages.map((msg: ChatMessage) => ({
      isPlayer: msg.role === "user",
      content: msg.parts[0]?.text || "",
    }));

    // 添加到已显示的消息列表
    this.displayedMessages.push(...newDialogs);

    logger.log(
      `Loaded page ${this.currentPage + 1}, showing ${
        this.displayedMessages.length
      }/${this.allMessages.length} messages`
    );

    // 更新聊天内容布局
    if (this.layout) {
      this.layout.UpdateDialog(this.displayedMessages);
    }

    // 更新页数
    this.currentPage++;

    // 更新加载更多按钮状态
    this.updateLoadMoreBtn();

    // 如果是第一次加载，滚动到顶部
    if (this.currentPage === 1 && this.scrollView) {
      this.scheduleOnce(() => {
        this.scrollView.scrollToTop(0.5);
      }, 0.1);
    }
  }

  /**
   * 加载更多按钮点击事件
   */
  private onLoadMore() {
    if (this.hasMoreMessages()) {
      this.loadMoreMessages();
    }
  }

  /**
   * 判断是否还有更多消息
   */
  private hasMoreMessages(): boolean {
    return this.currentPage * this.pageSize < this.allMessages.length;
  }

  /**
   * 更新加载更多按钮状态
   */
  private updateLoadMoreBtn() {
    if (!this.loadMoreBtn) return;

    const hasMore = this.hasMoreMessages();
    this.loadMoreBtn.node.active = hasMore;

    if (this.loadMoreLabel) {
      const remainingCount =
        this.allMessages.length - this.currentPage * this.pageSize;
      this.loadMoreLabel.string = hasMore
        ? `加载更多 (还有${remainingCount}条)`
        : "没有更多消息了";
    }
  }

  /**
   * 清除当前角色的聊天记录
   */
  public clearHistory() {
    ChatHistoryManager.Instance.clearHistory(this.id);
    logger.log(`Cleared chat history for role ${this.id}`);

    // 重置数据
    this.allMessages = [];
    this.displayedMessages = [];
    this.currentPage = 0;

    // 重新加载（显示空记录）
    this.loadChatHistory();
  }

  /**
   * 刷新聊天记录显示
   */
  public refreshHistory() {
    this.loadChatHistory();
  }

  /**
   * 滚动到最新记录（顶部，因为是倒序）
   */
  public scrollToLatest() {
    if (this.scrollView) {
      this.scrollView.scrollToTop(0.5);
    }
  }

  /**
   * 滚动到最早记录（底部，因为是倒序）
   */
  public scrollToEarliest() {
    if (this.scrollView) {
      this.scrollView.scrollToBottom(0.5);
    }
  }

  /**
   * 获取消息统计信息
   */
  public getMessageStats(): {
    total: number;
    displayed: number;
    remaining: number;
  } {
    return {
      total: this.allMessages.length,
      displayed: this.displayedMessages.length,
      remaining: this.allMessages.length - this.displayedMessages.length,
    };
  }

  protected onEnable(): void {
    // NavigationPanel 始终显示，不需要隐藏 DefaultView
  }

  /**
   * 返回按钮点击事件
   */
  returnBtn() {
    this.onClose();
    NavigationManager.Instance.closePopupPanel(this.node);
  }
}