import { fabric } from "fabric-with-all";
import initAligningGuidelines, {
  initCenteringGuidelines,
} from "../utils/helperLine";
import { ThumbnailManager } from "./ThumbnailManager";
import { ExportManager } from "./ExportManager";
import {
  isGroupLayer,
  OperationType,
  OperationTypes,
} from "../utils/layerHelper";
import { AnimationManager } from "./animation/AnimationManager";
import { createCanvas } from "../utils/canvasFactory";
import { CanvasEventManager } from "./events/CanvasEventManager";
import CanvasConfig from "../config/canvasConfig";
import { RedGreenModeManager } from "./RedGreenModeManager";
import { EraserStateManager } from "./EraserStateManager";
import { deepClone, optimizeCanvasRendering } from "../utils/helper";
import { ChangeFixedImageCommand } from "../commands/ObjectLayerCommands";
import { isFunction } from "lodash-es";
import {
  restoreObjectLayerAssociations,
  simplifyLayers,
  validateLayerAssociations,
} from "../utils/layerUtils";

export class CanvasManager {
  constructor(canvasElement, options) {
    this.canvasElement = canvasElement;
    this.width = options.width || 1024;
    this.height = options.height || 768;
    this.backgroundColor = options.backgroundColor || "#ffffff";
    this.toolManager = options.toolManager || null; // 工具管理器引用
    this.currentZoom = options.currentZoom || { value: 100 };
    this.maskLayer = null; // 添加蒙层引用
    this.editorMode = CanvasConfig.defaultTool; // 默认编辑器模式
    this.layers = options.layers || null; // 图层引用
    this.canvasWidth = options.canvasWidth || this.width; // 画布宽度
    this.canvasHeight = options.canvasHeight || this.height; // 画布高度
    this.canvasColor = options.canvasColor || "#ffffff"; // 画布背景颜色
    this.enabledRedGreenMode = options.enabledRedGreenMode || false; // 是否启用红绿图模式
    this.eraserStateManager = null; // 橡皮擦状态管理器引用
    // 初始化画布
    this.initializeCanvas();
  }

  initializeCanvas() {
    console.log("fabric.version:", fabric.version);
    this.canvas = createCanvas(this.canvasElement, {
      width: this.width,
      height: this.height,
      preserveObjectStacking: true,
      enableRetinaScaling: true,
      stopContextMenu: true,
      fireRightClick: true,
    });

    // 初始化动画管理器
    this.animationManager = new AnimationManager(this.canvas, {
      currentZoom: this.currentZoom,
      wheelThrottleTime: 15, // 降低滚轮事件节流时间，提高响应性
      defaultEase: "power2.lin",
      defaultDuration: 0.3, // 缩短默认动画时间
    });

    // 初始化缩略图管理器
    this.thumbnailManager = new ThumbnailManager(this.canvas, {
      // 可以根据需求自定义选项
      // layerThumbSize: { width: 32, height: 32 },
      // elementThumbSize: { width: 32, height: 24 },
      layers: this.layers,
    });

    this.canvas.thumbnailManager = this.thumbnailManager; // 将缩略图管理器绑定到画布

    // 设置画布辅助线
    initAligningGuidelines(this.canvas);

    // 设置画布中心线
    initCenteringGuidelines(this.canvas);

    // 初始化画布事件监听器
    this._initCanvasEvents();
  }

  /**
   * 初始化画布事件监听器
   * 设置鼠标事件、键盘事件等
   * @private
   */
  _initCanvasEvents() {
    // 添加笔刷图像转换处理回调
    this.canvas.onBrushImageConverted = async (fabricImage) => {
      // 如果图层管理器存在，将图像合并到当前活动图层
      if (this.layerManager) {
        // 获取当前活动图层
        const activeLayer = this.layerManager.getActiveLayer();

        if (activeLayer) {
          // 确保新图像具有正确的图层信息
          fabricImage.set({
            layerId: activeLayer.id,
            layerName: activeLayer.name,
            id:
              fabricImage.id ||
              `brush_img_${Date.now()}_${Math.floor(Math.random() * 1000)}`,
          });

          // 执行高保真合并操作
          await this.eventManager?.mergeLayerObjectsForPerformance?.({
            fabricImage,
            activeLayer,
          });

          this.thumbnailManager?.generateLayerThumbnail(activeLayer.id);

          // 返回true表示不要自动添加到画布，因为我们已经通过图层管理器处理了
          return true;
        } else {
          console.warn("没有活动图层，使用默认行为添加图像");
        }
      }

      // 返回false表示使用默认行为（直接添加到画布）
      return false;
    };

    this.eraserStateManager = new EraserStateManager(
      this.canvas,
      this.layerManager
    );

    // 监听擦除开始事件
    this.canvas.on("erasing:start", () => {
      console.log("开始擦除");
      this.eraserStateManager.startErasing();
    });

    // 监听擦除结束事件
    this.canvas.on("erasing:end", async (e) => {
      console.log("擦除完成", e.targets);
      // 可以在这里保存状态到命令管理器
      const affectedObjects = e.targets || [];
      const command = this.eraserStateManager.endErasing(affectedObjects);
      if (command && this.commandManager) {
        await this.commandManager?.executeCommand?.(command);
      } else {
        await command?.execute?.(); // 如果没有命令管理器，直接执行命令
      }

      // 更新交互性
      command &&
        (await this.layerManager?.updateLayersObjectsInteractivity?.());

      this.thumbnailManager?.generateLayerThumbnail(
        this.layerManager?.activeLayerId?.value
      );
    });
  }

  /**
   * 设置编辑器模式
   * @param {string} mode 'draw'、'select'或'pan'
   */
  toolChanged(mode) {
    if (!OperationTypes.includes(mode)) {
      console.warn(`不支持的编辑器模式: ${mode}`);
      return;
    }

    this.editorMode = mode;

    // 如果已创建事件管理器，更新它的编辑器模式
    if (this.eventManager) {
      this.eventManager.setEditorMode(mode);
    }
  }

  setToolManager(toolManager) {
    this.toolManager = toolManager || null; // 工具管理器引用

    // 更新红绿图模式管理器的工具管理器引用
    if (this.redGreenModeManager) {
      this.redGreenModeManager.toolManager = this.toolManager;
    }

    // 如果已创建事件管理器，更新它的工具管理器引用
    if (this.eventManager) {
      this.eventManager.toolManager = this.toolManager;
    }
  }

  setLayerManager(layerManager) {
    this.layerManager = layerManager || null; // 图层管理器引用

    // 初始化导出管理器（需要在图层管理器设置后初始化）
    if (this.layerManager) {
      this.exportManager = new ExportManager(this, this.layerManager);
    }

    // 更新红绿图模式管理器的图层管理器引用
    if (this.redGreenModeManager) {
      this.redGreenModeManager.layerManager = this.layerManager;
    }

    if (this.eraserStateManager) {
      this.eraserStateManager.setLayerManager(this.layerManager);
    }
  }

  /**
   * 设置命令管理器
   * @param {Object} commandManager 命令管理器实例
   */
  setCommandManager(commandManager) {
    this.commandManager = commandManager;

    // 更新红绿图模式管理器的命令管理器引用
    if (this.redGreenModeManager) {
      this.redGreenModeManager.commandManager = this.commandManager;
    }
  }

  /**
   * 设置液化管理器
   * @param {Object} liquifyManager 液化管理器实例
   */
  setLiquifyManager(liquifyManager) {
    this.liquifyManager = liquifyManager;
  }

  /**
   * 设置选区管理器
   * @param {Object} selectionManager 选区管理器实例
   */
  setSelectionManager(selectionManager) {
    this.selectionManager = selectionManager;

    // 如果已创建事件管理器，更新它的选区管理器引用
    if (this.eventManager) {
      this.eventManager.selectionManager = this.selectionManager;
    }
  }

  // 设置红绿图模式管理器
  setRedGreenModeManager(redGreenModeManager) {
    this.redGreenModeManager = redGreenModeManager;
  }

  setupCanvasEvents(activeElementId, layerManager) {
    // 创建画布事件管理器
    this.eventManager = new CanvasEventManager(this.canvas, {
      toolManager: this.toolManager,
      animationManager: this.animationManager,
      thumbnailManager: this.thumbnailManager,
      editorMode: this.editorMode,
      activeElementId: activeElementId,
      layerManager: layerManager,
      layers: this.layers,
    });

    // 设置动画交互效果
    this.animationManager.setupInteractionAnimations();
  }

  setupLongPress(callback) {
    if (this.eventManager) {
      this.eventManager.setupLongPress(callback);
    }
  }

  updateSelectedElements(opt, activeElementId) {
    if (this.eventManager) {
      this.eventManager.updateSelectedElements(opt);
    } else {
      const selected = opt.selected[0];
      if (selected) {
        activeElementId.value = selected.id;
      }
    }
  }

  clearSelectedElements(activeElementId) {
    if (this.eventManager) {
      this.eventManager.clearSelectedElements();
    } else if (activeElementId) {
      activeElementId.value = null;
    }
  }

  // 使用动画管理器的缩放方法
  animateZoom(point, targetZoom, options = {}) {
    this.animationManager.animateZoom(point, targetZoom, options);
  }

  // 应用缩放（为兼容性保留）
  _applyZoom(point, zoom, skipUpdate = false) {
    this.animationManager._applyZoom(point, zoom, skipUpdate);
  }

  // 使用动画管理器的平移方法
  animatePan(targetPosition, options = {}) {
    this.animationManager.animatePan(targetPosition, options);
  }

  // 应用平移（为兼容性保留）
  _applyPan(x, y) {
    this.animationManager._applyPan(x, y);
  }

  // 平移到指定元素
  panToElement(elementId) {
    this.animationManager.panToElement(elementId);
  }

  // 重置缩放并居中内容
  async resetZoom(animated = true) {
    // 先重置缩放
    await this.animationManager.resetZoom(animated);

    // // 重置视图变换以确保元素位置正确
    // this._resetViewportTransform();

    // // 居中所有画布元素，包括背景层和其他元素
    // this.centerAllObjects();

    // 重新渲染画布使变更生效
    this.canvas.renderAll();
  }

  // 设置固定图层可擦除状态
  setFixedLayerErasable({ type = "isFixed", flag = false }) {
    const layer = this.layers.value.find((layer) => layer[type]);
    if (layer) {
      // 设置固定图层的可擦除状态
      layer.locked = flag;
      // 更新画布对象的erasable属性
      const fabricObject = this.canvas
        .getObjects()
        .find((obj) => obj.id === layer.id);
      if (fabricObject) {
        fabricObject.erasable = flag;
        fabricObject.set("erasable", flag);
        fabricObject.setCoords(); // 更新控制点坐标
        this.canvas.renderAll(); // 重新渲染画布
      }
      return;
    }
  }

  setCanvasSize(width, height) {
    this.width = width;
    this.height = height;
    this.canvas.setWidth(width);
    this.canvas.setHeight(height);

    // 重置视图变换以确保元素位置正确
    this._resetViewportTransform();

    // 居中所有画布元素，包括背景层和其他元素
    this.centerAllObjects();

    // 重新渲染画布使变更生效
    this.canvas.renderAll();
  }

  /**
   * 重置视图变换，使元素回到原始位置
   * @private
   */
  _resetViewportTransform(zoom) {
    // 保存当前缩放值
    const currentZoom = zoom ?? this.canvas.getZoom();

    // 重置视图变换，但保留缩放级别
    this.canvas.setViewportTransform([currentZoom, 0, 0, currentZoom, 0, 0]);
  }

  /**
   * 居中所有画布元素
   * 以背景层为参照，计算背景层的偏移量并应用到所有对象上
   * 这样可以保持对象间的相对位置关系不变
   */
  centerAllObjects() {
    if (!this.canvas) return;

    // 获取所有可见对象（不是背景元素的对象）
    const allObjects = this.canvas.getObjects();
    if (allObjects.length === 0) return;

    const visibleObjects = allObjects.filter(
      (obj) => obj.visible !== false && !obj.excludeFromExport
    );

    // 如果没有可见对象，直接返回
    if (visibleObjects.length === 0) return;

    // 获取背景对象
    const backgroundObject = visibleObjects.find((obj) => obj.isBackground);

    this.canvas?.clipPath?.set?.({
      left: this.width / 2,
      top: this.height / 2,
      originX: "center",
      originY: "center",
    });

    this.canvas?.clipPath?.setCoords?.();
    // 如果只有背景层或没有背景层，使用原有逻辑
    if (!backgroundObject) {
      console.warn("未找到背景层，使用默认居中逻辑");
      // 如果只有一个对象且可能是背景，直接居中
      if (visibleObjects.length === 1) {
        const obj = visibleObjects[0];
        obj.set({
          left: this.width / 2,
          top: this.height / 2,
          originX: "center",
          originY: "center",
        });
        obj.setCoords();
        this.canvas.renderAll();
      }
      return;
    }

    // 记录背景层居中前的位置
    const backgroundOldLeft = backgroundObject.left;
    const backgroundOldTop = backgroundObject.top;

    // 计算画布中心点
    const canvasCenterX = this.width / 2;
    const canvasCenterY = this.height / 2;

    // 设置背景层居中
    backgroundObject.set({
      left: canvasCenterX,
      top: canvasCenterY,
      originX: "center",
      originY: "center",
    });

    // 计算背景层的偏移量
    const deltaX = backgroundObject.left - backgroundOldLeft;
    const deltaY = backgroundObject.top - backgroundOldTop;

    // 将相同的偏移量应用到所有其他对象上
    const otherObjects = visibleObjects.filter(
      (obj) => obj !== backgroundObject
    );

    otherObjects.forEach((obj) => {
      obj.set({
        left: obj.left + deltaX,
        top: obj.top + deltaY,
      });
      obj.setCoords(); // 更新对象的控制点坐标
    });

    // 如果有背景层，更新蒙层位置
    if (backgroundObject && CanvasConfig.isCropBackground) {
      this.updateMaskPosition(backgroundObject);
    }

    // 重新渲染画布
    this.canvas.renderAll();
  }

  /**
   * 计算多个对象的总边界框
   * @private
   * @param {Array} objects 要计算边界的对象数组
   * @return {Object} 边界信息，包含left、top、width、height
   */
  _calculateObjectsBounds(objects) {
    if (!objects || objects.length === 0) return null;

    let minX = Infinity;
    let minY = Infinity;
    let maxX = -Infinity;
    let maxY = -Infinity;

    objects.forEach((obj) => {
      const bound = obj.getBoundingRect();
      minX = Math.min(minX, bound.left);
      minY = Math.min(minY, bound.top);
      maxX = Math.max(maxX, bound.left + bound.width);
      maxY = Math.max(maxY, bound.top + bound.height);
    });

    return {
      left: minX,
      top: minY,
      width: maxX - minX,
      height: maxY - minY,
    };
  }

  setCanvasColor(color) {
    this.backgroundColor = color;
    // this.canvas.setBackgroundColor(
    //   color,
    //   this.canvas.renderAll.bind(this.canvas)
    // );
    this.thumbnailManager?.generateLayerThumbnail?.(
      this.layers?.value.find((layer) => layer.isBackground)?.id
    );
  }

  /**
   * 居中背景层
   * @param {Object} backgroundLayerObject 背景层对象
   * @param {Number} canvasWidth 画布宽度
   * @param {Number} canvasHeight 画布高度
   */
  centerBackgroundLayer(canvasWidth, canvasHeight) {
    const backgroundLayerObject = this.getBackgroundLayer();
    if (!backgroundLayerObject) return false;

    // const bgWidth = backgroundLayerObject.width * backgroundLayerObject.scaleX;
    // const bgHeight =
    //   backgroundLayerObject.height * backgroundLayerObject.scaleY;

    // 计算居中位置
    const left = canvasWidth / 2;
    const top = canvasHeight / 2;

    backgroundLayerObject.set({
      left: left,
      top: top,
      originX: "center",
      originY: "center",
    });

    !CanvasConfig.isCropBackground && this.canvas.renderAll(); // 如果不需要裁剪背景层以外的内容，则渲染画布

    // 如果需要裁剪背景层以外的内容，则更新蒙层位置
    // 创建或更新蒙层
    CanvasConfig.isCropBackground &&
      !this.enabledRedGreenMode &&
      this.createOrUpdateMask(backgroundLayerObject);
    return true;
  }

  /**
   * 创建或更新蒙层，用于裁剪不可见区域
   * @param {Object} backgroundLayerObject 背景层对象
   */
  createOrUpdateMask(backgroundLayerObject) {
    if (!backgroundLayerObject) return;

    const bgWidth = backgroundLayerObject.width * backgroundLayerObject.scaleX;
    const bgHeight =
      backgroundLayerObject.height * backgroundLayerObject.scaleY;
    const left = backgroundLayerObject.left;
    const top = backgroundLayerObject.top;

    // 如果已经存在蒙层，则更新它
    if (this.maskLayer) {
      this.canvas.remove(this.maskLayer);
    }

    // 创建蒙层 - 使用透明矩形作为裁剪区域
    this.maskLayer = new fabric.Rect({
      id: "canvasMaskLayer",
      width: bgWidth,
      height: bgHeight,
      left: left,
      top: top,
      fill: "transparent",
      stroke: "transparent",
      strokeWidth: 1,
      strokeDashArray: [5, 5],
      selectable: false,
      evented: false,
      hoverCursor: "default",
      originX: "center",
      originY: "center",
    });

    // 将蒙层添加到画布
    this.canvas.add(this.maskLayer);

    // 设置蒙层为最顶层
    this.maskLayer.bringToFront();

    this.canvas.clipPath = new fabric.Rect({
      width: bgWidth,
      height: bgHeight,
      left: left,
      top: top,
      originX: backgroundLayerObject.originX || "left",
      originY: backgroundLayerObject.originY || "top",
      absolutePositioned: true,
    });
  }
  getBackgroundLayer() {
    if (!this.canvas) return null;

    const backgroundLayer = this.canvas.getObjects().find((obj) => {
      return obj.isBackground;
    });

    if (backgroundLayer) return backgroundLayer;

    // 如果没有找到背景层，则根据图层ID查找
    const backgroundLayerId = this.layers.value.find((layer) => {
      return layer.isBackground;
    })?.id;

    const backgroundLayerByBgLayer = this.canvas.getObjects().find((obj) => {
      return obj.isBackground || obj.id === backgroundLayerId;
    });
    if (!backgroundLayerByBgLayer) {
      console.warn(
        "CanvasManager.js  = >getBackgroundLayer 方法没有找到背景层"
      );
    }

    return backgroundLayerByBgLayer;
  }
  /**
   * 更新蒙层位置
   * @param {Object} backgroundLayerObject 背景层对象
   */
  updateMaskPosition(backgroundLayerObject) {
    if (!backgroundLayerObject || !this.maskLayer || !this.canvas.clipPath)
      return;

    const left = backgroundLayerObject.left;
    const top = backgroundLayerObject.top;

    this.maskLayer.set({
      left: left,
      top: top,
      width: backgroundLayerObject.width * backgroundLayerObject.scaleX,
      height: backgroundLayerObject.height * backgroundLayerObject.scaleY,
      originX: backgroundLayerObject.originX || "left",
      originY: backgroundLayerObject.originY || "top",
    });

    this.canvas.clipPath.set({
      left: left,
      top: top,
      width: backgroundLayerObject.width * backgroundLayerObject.scaleX,
      height: backgroundLayerObject.height * backgroundLayerObject.scaleY,
    });

    this.canvas.renderAll();
  }

  /**
   * 更新指定图层的缩略图
   * @param {String} layerId 图层ID
   */
  updateLayerThumbnail(layerId) {
    this.thumbnailManager?.generateLayerThumbnail?.(layerId);
  }

  /**
   * 更新所有图层和元素的缩略图
   */
  updateAllThumbnails() {
    // 为所有元素生成缩略图
    this.thumbnailManager?.generateAllLayerThumbnails?.(this.layers.value);
  }

  /**
   *
   * 更改固定图层的图片
   * @param {String} imageUrl 新的图片URL
   * @param {Object} options 选项
   * @param {String} options.targetLayerType 目标图层类型（background/fixed）
   * @param {Boolean} options.undoable 是否可撤销，默认不可撤销
   * @return {Object} 执行结果
   * */
  async changeFixedImage(imageUrl, options = {}) {
    if (!this.layerManager) {
      console.error("图层管理器未设置，无法更改固定图层图片");
      return;
    }

    const command = new ChangeFixedImageCommand({
      canvas: this.canvas,
      layerManager: this.layerManager,
      imageUrl: imageUrl,
      targetLayerType: options.targetLayerType || "fixed", // background/fixed
      canvasWidth: this.canvasWidth,
      canvasHeight: this.canvasHeight,
      ...options,
    });

    command.undoable =
      options.undoable !== undefined ? options.undoable : false; // 默认不可撤销   undoable = true 为可撤销

    return (
      (await command?.execute?.()) || {
        success: false,
        layerId: null,
        imageUrl: null,
      }
    );
  }

  /**
   * 导出图片
   * @param {Object} options 导出选项
   * @param {Boolean} options.isContainBg 是否包含背景图层
   * @param {Boolean} options.isContainFixed 是否包含固定图层
   * @param {String} options.layerId 导出具体图层ID
   * @param {Array} options.layerIdArray 导出多个图层ID数组
   * @param {String} options.expPicType 导出图片类型 (png/jpg/svg)
   * @param {Boolean} options.restoreOpacityInRedGreen 红绿图模式下是否恢复透明度为1
   * @returns {String} 导出的图片数据URL
   */
  exportImage(options = {}) {
    if (!this.exportManager) {
      console.error("导出管理器未初始化，请确保已设置图层管理器");
      throw new Error("导出管理器未初始化");
    }

    try {
      // 自动设置红绿图模式相关参数
      const enhancedOptions = {
        ...options,
        // 如果没有明确指定，则根据当前模式自动设置
        restoreOpacityInRedGreen:
          options.restoreOpacityInRedGreen !== undefined
            ? options.restoreOpacityInRedGreen
            : true, // 默认在红绿图模式下恢复透明度
      };

      // 如果在红绿图模式下且没有指定具体的图层，自动包含所有普通图层
      if (
        this.enabledRedGreenMode &&
        !options.layerId &&
        (!options.layerIdArray || options.layerIdArray.length === 0)
      ) {
        console.log("检测到红绿图模式，自动包含所有普通图层进行导出");

        // 获取所有非背景、非固定的普通图层ID
        const normalLayerIds =
          this.layers?.value
            ?.filter(
              (layer) => !layer.isBackground && !layer.isFixed && layer.visible
            )
            ?.map((layer) => layer.id) || [];

        if (normalLayerIds.length > 0) {
          enhancedOptions.layerIdArray = normalLayerIds;
          console.log("红绿图模式导出图层:", normalLayerIds);
        }
      }

      return this.exportManager.exportImage(enhancedOptions);
    } catch (error) {
      console.error("CanvasManager导出图片失败:", error);
      throw error;
    }
  }

  dispose() {
    // 释放导出管理器资源
    if (this.exportManager) {
      this.exportManager = null;
    }

    // 释放事件管理器资源
    if (this.eventManager) {
      this.eventManager.dispose();
      this.eventManager = null;
    }

    // 释放动画管理器资源
    if (this.animationManager) {
      this.animationManager.dispose();
      this.animationManager = null;
    }

    // 释放缩略图管理器资源
    if (this.thumbnailManager) {
      this.thumbnailManager.dispose();
      this.thumbnailManager = null;
    }

    if (this.canvas) {
      this.canvas.dispose();
    }
  }

  getJSON() {
    // // 简化图层数据，在loadJSON时要根据id恢复引用
    // const simplifyLayers = (layers) => {
    //   return layers.map((layer) => {
    //     if (layer?.children?.length) {
    //       layer.children = layer.children.map((child) => {
    //         return {
    //           id: child.id,
    //           type: child.type,
    //           layerId: child.layerId,
    //           layerName: child.layerName,
    //           isBackground: child.isBackground,
    //           isLocked: child.isLocked,
    //           isVisible: child.isVisible,
    //           isFixed: child.isFixed,
    //           parentId: child.parentId,
    //           fabricObject: child.fabricObject
    //             ? {
    //                 id: child.fabricObject.id,
    //                 type: child.fabricObject.type,
    //                 layerId: child.fabricObject.layerId,
    //                 layerName: child.fabricObject.layerName,
    //               }
    //             : {},
    //           fabricObjects:
    //             child.fabricObjects?.map((obj) => ({
    //               id: obj.id,
    //               type: obj.type,
    //               layerId: obj.layerId,
    //               layerName: obj.layerName,
    //             })) || [],
    //         };
    //       });
    //     }
    //     return {
    //       id: layer.id,
    //       type: layer.type,
    //       layerId: layer.layerId,
    //       layerName: layer.layerName,
    //       isBackground: layer.isBackground,
    //       isLocked: layer.isLocked,
    //       isVisible: layer.isVisible,
    //       isFixed: layer.isFixed,
    //       parentId: layer.parentId,
    //       fabricObject: child.fabricObject
    //         ? {
    //             id: child.fabricObject.id,
    //             type: child.fabricObject.type,
    //             layerId: child.fabricObject.layerId,
    //             layerName: child.fabricObject.layerName,
    //           }
    //         : {},
    //       fabricObjects:
    //         child.fabricObjects?.map((obj) => ({
    //           id: obj.id,
    //           type: obj.type,
    //           layerId: obj.layerId,
    //           layerName: obj.layerName,
    //         })) || [],
    //       children: layer.children,
    //     };
    //   });
    // };
    try {
      const simplifyLayersData = simplifyLayers(
        JSON.parse(JSON.stringify(this.layers.value))
      );
      console.log("获取画布JSON数据...", simplifyLayersData);
      return JSON.stringify({
        canvas: this.canvas.toJSON([
          "id",
          "type",
          "layerId",
          "layerName",
          "isBackground",
          "isLocked",
          "isVisible",
          "isFixed",
          "parentId",
          "eraser",
          "eraserable",
          "erasable",
        ]),
        layers: JSON.stringify(simplifyLayersData), // 简化图层数据
        // layers: JSON.stringify(JSON.parse(JSON.stringify(this.layers.value))), // 全数据
        version: "1.0", // 添加版本信息
        timestamp: new Date().toISOString(), // 添加时间戳
        canvasWidth: this.canvasWidth.value,
        canvasHeight: this.canvasHeight.value,
        canvasColor: this.canvasColor.value,
        activeLayerId: this.layerManager?.activeLayerId?.value,
      });
    } catch (error) {
      console.error("获取画布JSON失败:", error);
      throw new Error("获取画布JSON失败");
    }
  }

  loadJSON(json, calllBack) {
    console.log("加载画布JSON数据:", json);

    // 确保传入的json是字符串格式
    if (typeof json === "object") {
      json = JSON.stringify(json);
    } else if (typeof json !== "string") {
      throw new Error("loadJSON方法需要传入字符串或对象格式的JSON数据");
    }
    // 解析JSON字符串
    try {
      const parsedJson = JSON.parse(json);

      return new Promise(async (resolve, reject) => {
        const tempLayers = JSON.parse(parsedJson?.layers) || [];
        const canvasData = parsedJson?.canvas;

        if (!tempLayers) {
          reject(new Error("JSON数据中缺少layers字段"));
          return;
        }

        if (!canvasData) {
          reject(new Error("JSON数据中缺少canvas字段"));
          return;
        }

        this.layers.value = tempLayers;

        // this.canvasWidth.value = parsedJson.canvasWidth || this.width;
        // this.canvasHeight.value = parsedJson.canvasHeight || this.height;
        // this.canvasColor.value = parsedJson.canvasColor || this.backgroundColor;

        console.log("是否检测到红绿图模式内容:", this.enabledRedGreenMode);

        // 重置视图变换以确保元素位置正确
        this._resetViewportTransform(1);
        let canvasClipPath = null;
        // 克隆当前裁剪路径
        if (this.canvas?.clipPath) {
          canvasClipPath = this.canvas?.clipPath;
        }

        // 清除当前画布内容
        this.canvas.clear();
        console.log("清除当前画布内容", canvasData);
        delete canvasData.clipPath; // 删除当前裁剪路径
        // 加载画布数据
        this.canvas.loadFromJSON(canvasData, async () => {
          await optimizeCanvasRendering(this.canvas, async () => {
            // 清空重做栈
            this.commandManager?.clear?.();
            this.backgroundColor = parsedJson.backgroundColor || "#ffffff";
            if (canvasClipPath) {
              // canvasClipPath.set({
              //   absolutePositioned: true,
              // });
              this.canvas.clipPath = canvasClipPath;
              // await new Promise((resolve) => {
              //   debugger;
              //   fabric.util.enlivenObjects([canvasClipPath], (clipPaths) => {
              //     if (clipPaths && clipPaths.length > 0) {
              //       resolve(clipPaths[0]);
              //     } else {
              //       resolve(null);
              //     }
              //   });
              // });
              // debugger;
            }
            try {
              // 重置画布数据
              this.setCanvasSize(this.canvas.width, this.canvas.height);
              // 重新构建对象关系
              restoreObjectLayerAssociations(
                this.layers.value,
                this.canvas.getObjects()
              );

              // 验证图层关联关系  -  稳定后可以注释
              const isValidate = validateLayerAssociations(
                this.layers.value,
                this.canvas.getObjects()
              );

              console.log("图层关联验证结果:", isValidate);

              this.layerManager.activeLayerId.value =
                this.layers.value[0]?.id || parsedJson?.activeLayerId || null;

              // // 如果检测到红绿图模式内容，进行缩放调整
              // if (this.enabledRedGreenMode) {
              //   this._rescaleRedGreenModeContent();
              // }

              // 重载代码后支持回调中操作一些内容
              await calllBack?.();

              // 确保所有对象的交互性正确设置
              await this.layerManager?.updateLayersObjectsInteractivity?.(
                false
              );
              console.log(this.layerManager.layers.value);

              // 更新所有缩略图
              setTimeout(() => {
                this.updateAllThumbnails();
              }, 500);

              console.log("画布JSON数据加载完成");
              resolve();
            } catch (error) {
              console.error("恢复图层数据失败:", error);
              reject(new Error("恢复图层数据失败: " + error.message));
            }
          });
        });
      });
    } catch (error) {
      console.error("解析JSON失败:", error);
      throw new Error("解析JSON失败，请检查输入格式: " + error.message);
    }
  }

  /**
   * 缩放红绿图模式内容以适应当前画布大小
   * 确保衣服底图和红绿图永远在画布内可见
   * @private
   */
  _rescaleRedGreenModeContent() {
    if (!this.canvas) return;

    console.log("正在重新缩放红绿图内容...");

    try {
      // 获取固定图层和普通图层
      const fixedLayerObject = this._getFixedLayerObject();
      const normalLayerObjects = this._getNormalLayerObjects();

      if (!fixedLayerObject) {
        console.warn("找不到固定图层对象，无法进行红绿图内容缩放");
        return;
      }

      // 计算边距（画布两侧各留出一定空间）
      const margin = 50;
      const maxWidth = this.canvas.width - margin * 2;
      const maxHeight = this.canvas.height - margin * 2;

      // 计算原始尺寸
      const originalWidth = fixedLayerObject.width * fixedLayerObject.scaleX;
      const originalHeight = fixedLayerObject.height * fixedLayerObject.scaleY;

      // 计算需要的缩放比例，确保图像完全适应画布
      const scaleX = maxWidth / originalWidth;
      const scaleY = maxHeight / originalHeight;
      const scale = Math.min(scaleX, scaleY);

      console.log(
        `计算的缩放比例: ${scale}，原始尺寸: ${originalWidth}x${originalHeight}，目标尺寸: ${maxWidth}x${maxHeight}`
      );

      // 如果缩放比例接近1，不进行缩放
      if (Math.abs(scale - 1) < 0.05) {
        console.log("缩放比例接近1，不进行缩放，仅居中内容");
        this.centerAllObjects();
        return;
      }

      // 缩放固定图层（衣服底图）
      this._rescaleObject(fixedLayerObject, scale);

      // 缩放所有普通图层对象（红绿图和其他内容）
      normalLayerObjects.forEach((obj) => {
        // 红绿图对象应与底图保持完全一致的位置和大小
        if (this._isLikelyRedGreenImage(obj, fixedLayerObject)) {
          // 完全匹配底图的位置和大小
          obj.set({
            scaleX: fixedLayerObject.scaleX,
            scaleY: fixedLayerObject.scaleY,
            left: fixedLayerObject.left,
            top: fixedLayerObject.top,
            originX: fixedLayerObject.originX || "center",
            originY: fixedLayerObject.originY || "center",
          });
        } else {
          // 其他普通对象进行等比例缩放
          this._rescaleObject(obj, scale);
        }
      });

      // 重新居中所有内容
      this.centerAllObjects();

      // 更新所有对象的坐标系统
      this.canvas.getObjects().forEach((obj) => {
        obj.setCoords();
      });

      // 渲染画布
      this.canvas.renderAll();

      console.log("红绿图内容缩放完成");
    } catch (error) {
      console.error("缩放红绿图内容时出错:", error);
    }
  }

  /**
   * 缩放单个对象
   * @param {Object} obj fabric对象
   * @param {Number} scale 缩放比例
   * @private
   */
  _rescaleObject(obj, scale) {
    if (!obj) return;

    // 保存原始中心点
    const center = obj.getCenterPoint();

    // 应用新的缩放
    obj.set({
      scaleX: obj.scaleX * scale,
      scaleY: obj.scaleY * scale,
    });

    // 重新定位到原中心点
    obj.setPositionByOrigin(center, "center", "center");
    obj.setCoords();
  }

  /**
   * 获取固定图层对象（衣服底图）
   * @returns {Object|null} 固定图层对象或null
   * @private
   */
  _getFixedLayerObject() {
    if (!this.layers || !this.layers.value) return null;

    // 查找固定图层
    const fixedLayer = this.layers.value.find((layer) => layer.isFixed);
    if (!fixedLayer) return null;

    // 返回图层中的fabric对象
    return fixedLayer.fabricObject || null;
  }

  /**
   * 获取所有普通图层对象（包括红绿图）
   * @returns {Array} 普通图层对象数组
   * @private
   */
  _getNormalLayerObjects() {
    if (!this.layers || !this.layers.value) return [];

    // 查找所有非背景、非固定的普通图层
    const normalLayers = this.layers.value.filter(
      (layer) => !layer.isBackground && !layer.isFixed
    );

    // 收集所有普通图层中的对象
    const objects = [];
    normalLayers.forEach((layer) => {
      // 如果有单个对象属性
      if (layer.fabricObject) {
        objects.push(layer.fabricObject);
      }

      // 如果有对象数组
      if (Array.isArray(layer.fabricObjects)) {
        layer.fabricObjects.forEach((obj) => {
          if (obj) objects.push(obj);
        });
      }
    });

    return objects;
  }

  /**
   * 判断对象是否可能是红绿图
   * 通过比较与衣服底图的大小、位置来判断
   * @param {Object} obj 要检查的对象
   * @param {Object} fixedLayerObject 固定图层对象（衣服底图）
   * @returns {Boolean} 是否可能是红绿图
   * @private
   */
  _isLikelyRedGreenImage(obj, fixedLayerObject) {
    if (!obj || !fixedLayerObject) return false;

    // 检查对象是否为图像
    if (obj.type !== "image") return false;

    // 比较尺寸（允许5%的误差）
    const sizeMatch =
      Math.abs(
        obj.width * obj.scaleX -
          fixedLayerObject.width * fixedLayerObject.scaleX
      ) <
        fixedLayerObject.width * fixedLayerObject.scaleX * 0.05 &&
      Math.abs(
        obj.height * obj.scaleY -
          fixedLayerObject.height * fixedLayerObject.scaleY
      ) <
        fixedLayerObject.height * fixedLayerObject.scaleY * 0.05;

    // 比较位置（允许一定的偏差）
    const positionMatch =
      Math.abs(obj.left - fixedLayerObject.left) < 50 &&
      Math.abs(obj.top - fixedLayerObject.top) < 50;

    return sizeMatch && positionMatch;
  }
}