import {
  _decorator,
  Component,
  instantiate,
  Node,
  NodeEventType,
  ScrollView,
  Tween,
  UIOpacity,
  UITransform,
  Vec3,
  view,
} from "cc";
import { DialogManager } from "../../manager/DialogManager";
import { DialogBubble } from "./DialogBubble";
import { Dialog } from "../../data/DialogData";
const { ccclass, property } = _decorator;

@ccclass("ChatContentsLayout")
export class ChatContentsLayout extends Component {
  manager: DialogManager = null;

  @property(DialogBubble)
  lBubble: DialogBubble = null;
  @property(DialogBubble)
  rBubble: DialogBubble = null;

  // 当前显示的气泡
  private bubbles: DialogBubble[] = [];
  // 缓存池
  private cachedBubbles: DialogBubble[] = [];
  // 等待回复气泡的引用
  //private waitingBubble: DialogBubble = null;
  // 延时任务ID数组
  private delayedTasks: number[] = [];
  // ScrollView组件引用
  @property(ScrollView)
  private scrollView: ScrollView = null;

  // 内容透明度组件
  private contentOpacity: UIOpacity = null;
  // 是否正在按下
  private isPressing: boolean = false;
  // 长按计时器
  private longPressTimer: number = null;
  // 已显示的AI对话数量（用于避免重复显示）
  private displayedAIDialogCount: number = 0;

  fixMaxWidth: number;

  protected start(): void {
    this.lBubble.node.active = false;
    this.rBubble.node.active = false;
    // 设置气泡最大宽度为屏幕宽度的70%
    this.fixMaxWidth = view.getVisibleSize().width * 0.7;

    // 获取或添加UIOpacity组件到content节点
    this.contentOpacity =
      this.node.getComponent(UIOpacity) || this.node.addComponent(UIOpacity);

    // 注册触摸事件
    if (this.scrollView && this.scrollView.node) {
      this.scrollView.node.on(
        NodeEventType.TOUCH_START,
        this.onTouchStart,
        this
      );
      this.scrollView.node.on(NodeEventType.TOUCH_END, this.onTouchEnd, this);
      this.scrollView.node.on(
        NodeEventType.TOUCH_CANCEL,
        this.onTouchEnd,
        this
      );
    }
  }

  protected onEnable(): void {
    if (!this.manager) this.manager = DialogManager.getInstance();
    this.manager.layoutout = this;
  }

  /**
   * 更新玩家输入的对话（追加模式，不清空历史）
   * @param dialog 玩家输入的对话数据
   */
  updatePlayerDialog(dialog: Dialog): void {
    if (!dialog) return;

    // 不再清空气泡，改为追加模式以支持历史记录

    // 创建玩家气泡
    const playerBubble = this.createOrGetBubble(true);
    playerBubble.node.active = true;
    playerBubble.updateBubbleContent(dialog.content, true);
    this.bubbles.push(playerBubble);

    // 滚动到底部
    this.scheduleOnce(() => {
      this.scrollView.scrollToBottom();
    }, 0);
  }
  /**
   * 更新AI回复的对话（智能追加，避免重复显示）
   * @param dialogs AI回复的对话数据数组
   */
  updateAIDialogs(dialogs: Dialog[]): void {
    if (!dialogs || dialogs.length === 0) return;

    // 清理之前的延时任务
    this.clearDelayedTasks();

    // 只添加新的AI对话（避免重复显示历史记录）
    const newDialogs = dialogs.slice(this.displayedAIDialogCount);
    if (newDialogs.length > 0) {
      // 更新已显示数量
      this.displayedAIDialogCount = dialogs.length;

      // 逐个添加新的AI对话，带延时
      this.addAIDialogsWithDelay(newDialogs, 0);
    }

    this.node.position = Vec3.ZERO;
    // 滚动到底部（等待下一帧Layout更新完成）
    this.scheduleOnce(() => {
      this.scrollView.scrollToBottom();
    }, 0);
  }

  /**
   * 清理所有气泡到缓存池（改为public，供外部调用）
   */
  public clearAllBubbles(): void {
    for (const bubble of this.bubbles) {
      if (bubble && bubble.node) {
        bubble.node.active = false;
        this.cachedBubbles.push(bubble);
      }
    }
    this.bubbles = [];
    //this.waitingBubble = null;

    // 重置AI对话计数器
    this.displayedAIDialogCount = 0;

    // 清理多余的缓存气泡
    this.cleanupExcessCachedBubbles();
  }

  /**
   * 加载所有历史对话（用于初始化）
   * @param dialogs 所有对话记录
   */
  public loadAllDialogs(dialogs: Dialog[]): void {
    if (!dialogs || dialogs.length === 0) return;

    // 清空现有气泡
    this.clearAllBubbles();
    this.clearDelayedTasks();

    // 倒序遍历对话，从最后一个开始插入（保持正确的显示顺序）
    for (let i = dialogs.length - 1; i >= 0; i--) {
      const dialog = dialogs[i];
      const bubble = this.createOrGetBubble(dialog.isPlayer);
      bubble.node.active = true;
      bubble.updateBubbleContent(dialog.content, dialog.isPlayer);
      // 每个气泡插入到首位，确保旧消息在上面，新消息在下面
      bubble.node.setSiblingIndex(0);
      this.bubbles.push(bubble);

      // 统计AI对话数量
      if (!dialog.isPlayer) {
        this.displayedAIDialogCount++;
      }
    }

    // 滚动到底部
    this.scheduleOnce(() => {
      this.scrollView.scrollToBottom();
    }, 0.1);

    console.log(`ChatContentsLayout: Loaded ${dialogs.length} history dialogs`);
  }

  /**
   * 从缓存池获取或创建新的气泡
   * @param isPlayer 是否为玩家气泡
   * @returns DialogBubble实例
   */
  private createOrGetBubble(isPlayer: boolean): DialogBubble {
    // 尝试从缓存中获取合适的气泡
    for (let i = 0; i < this.cachedBubbles.length; i++) {
      const cached = this.cachedBubbles[i];
      if (cached && cached.node) {
        // 通过原始模板判断气泡类型
        const isRightBubble = cached.node.position.x > 0;
        if ((isPlayer && isRightBubble) || (!isPlayer && !isRightBubble)) {
          this.cachedBubbles.splice(i, 1);
          return cached;
        }
      }
    }

    // 缓存中没有合适的气泡，创建新的
    const templateBubble = isPlayer ? this.rBubble : this.lBubble;
    const newBubbleNode = instantiate(templateBubble.node);
    const newBubble = newBubbleNode.getComponent(DialogBubble);
    newBubble.init(this.fixMaxWidth);

    // 设置为子节点，具体位置由调用者决定
    newBubbleNode.setParent(this.node);

    return newBubble;
  }

  /**
   * 移除等待回复气泡
   */
  // private removeWaitingBubble(): void {
  //   if (this.waitingBubble && this.waitingBubble.node) {
  //     this.waitingBubble.node.active = false;
  //     this.cachedBubbles.push(this.waitingBubble);

  //     // 从当前气泡列表中移除
  //     const index = this.bubbles.indexOf(this.waitingBubble);
  //     if (index > -1) {
  //       this.bubbles.splice(index, 1);
  //     }
  //   }
  //   this.waitingBubble = null;
  // }

  /**
   * 带延时地添加AI对话
   * @param dialogs AI对话数组
   * @param index 当前处理的对话索引
   */
  private addAIDialogsWithDelay(dialogs: Dialog[], index: number): void {
    if (index >= dialogs.length) {
      return;
    }

    const dialog = dialogs[index];
    const delay = index > 0 ? Math.random() * 1000 + 500 : 0; // 第一条立即显示，后续延时500-1500ms

    const addCurrentDialog = () => {
      const aiBubble = this.createOrGetBubble(false);
      aiBubble.node.active = true;
      aiBubble.updateBubbleContent(dialog.content, false);
      // AI消息自然追加到末尾，显示在最下面（与玩家消息保持一致）
      this.bubbles.push(aiBubble);

      this.scheduleOnce(() => {
        this.scrollView.scrollToBottom();
      }, 0);

      // 递归处理下一条对话
      this.addAIDialogsWithDelay(dialogs, index + 1);
    };

    if (delay > 0) {
      const taskId = setTimeout(() => {
        // 从任务列表中移除
        const taskIndex = this.delayedTasks.indexOf(taskId);
        if (taskIndex > -1) {
          this.delayedTasks.splice(taskIndex, 1);
        }
        addCurrentDialog();
      }, delay);

      this.delayedTasks.push(taskId);
    } else {
      addCurrentDialog();
    }
  }

  /**
   * 清理多余的缓存气泡
   */
  private cleanupExcessCachedBubbles(): void {
    const maxCachedBubbles = 20;
    if (this.cachedBubbles.length > maxCachedBubbles) {
      const excessCount = this.cachedBubbles.length - maxCachedBubbles;
      for (let i = 0; i < excessCount; i++) {
        const bubble = this.cachedBubbles.shift();
        if (bubble && bubble.node) {
          bubble.node.destroy();
        }
      }
    }
  }

  /**
   * 清理所有延时任务
   */
  private clearDelayedTasks(): void {
    for (const taskId of this.delayedTasks) {
      clearTimeout(taskId);
    }
    this.delayedTasks = [];
  }

  /**
   * 保持向后兼容性的方法
   * @param dialogs 对话数组
   * @deprecated 请使用 updatePlayerDialog 和 updateAIDialogs 替代
   */
  UpdateDialog(dialogs: Dialog[]): void {
    // 为了保持兼容性，我们假设这是一个完整的对话更新
    // 清理所有现有气泡
    this.clearAllBubbles();
    this.clearDelayedTasks();

    // 逐个添加对话，从最后一个开始倒序插入（保持显示顺序）
    for (let i = dialogs.length - 1; i >= 0; i--) {
      const dialog = dialogs[i];
      const bubble = this.createOrGetBubble(dialog.isPlayer);
      bubble.node.active = true;
      bubble.updateBubbleContent(dialog.content, dialog.isPlayer, undefined);
      bubble.node.setSiblingIndex(0);
      this.bubbles.push(bubble);
    }
  }

  /**
   * 触摸开始事件
   */
  private onTouchStart(): void {
    // 清除之前的计时器
    if (this.longPressTimer) {
      clearTimeout(this.longPressTimer);
    }

    // 设置长按计时器（300ms后触发）
    this.longPressTimer = setTimeout(() => {
      this.isPressing = true;
      // 使用Tween动画平滑调整透明度
      Tween.stopAllByTarget(this.contentOpacity);
      new Tween(this.contentOpacity)
        .to(0.2, { opacity: 50 }) // 调整到约20%透明度
        .start();
    }, 300);
  }

  /**
   * 触摸结束事件
   */
  private onTouchEnd(): void {
    // 清除计时器
    if (this.longPressTimer) {
      clearTimeout(this.longPressTimer);
      this.longPressTimer = null;
    }

    // 如果已经按下，恢复透明度
    if (this.isPressing) {
      this.isPressing = false;
      Tween.stopAllByTarget(this.contentOpacity);
      new Tween(this.contentOpacity)
        .to(0.2, { opacity: 255 }) // 恢复到100%透明度
        .start();
    }
  }

  /**
   * 组件销毁时清理资源
   */
  protected onDestroy(): void {
    // 清理事件监听
    if (this.scrollView && this.scrollView.node) {
      this.scrollView.node.off(
        NodeEventType.TOUCH_START,
        this.onTouchStart,
        this
      );
      this.scrollView.node.off(NodeEventType.TOUCH_END, this.onTouchEnd, this);
      this.scrollView.node.off(
        NodeEventType.TOUCH_CANCEL,
        this.onTouchEnd,
        this
      );
    }

    // 清理计时器
    if (this.longPressTimer) {
      clearTimeout(this.longPressTimer);
      this.longPressTimer = null;
    }

    // 清理延时任务
    this.clearDelayedTasks();

    // 停止所有动画
    if (this.contentOpacity) {
      Tween.stopAllByTarget(this.contentOpacity);
    }
  }
}