import { Point3, Point2, fitCircleFrom3Points, calculateOppositeVector } from './mathUtils';
import {
  utilities as csUtils,
  Types as CoreTypes,
  getEnabledElement,
} from '@cornerstonejs/core';

import {
  AnnotationTool,
  utilities,
  Types,
  annotation,
  drawing,
} from '@cornerstonejs/tools';

const {
  drawHandles,
  drawLinkedTextBox,
  drawLine: drawLineSvg,
  drawCircle: drawCircleSvg,
  drawPath: drawPathSvg,
} = drawing;

import {
  vectorSubtract,
  vectorAdd,
  vectorScale,
  getAngleBetweenLines,
  degrees,
} from './mathUtils';
import {
  PublicToolProps,
  ToolProps,
  EventTypes,
  SVGDrawingHelper,
} from '@cornerstonejs/tools/dist/esm/types';

// 注解数据接口
interface HipNHAAngleMeasurementAnnotation extends Types.Annotation {
  data: {
    handles: {
      points: CoreTypes.Point3[];        // 8个点的世界坐标
      activeHandleIndex: number | null;  // 当前激活的手柄索引
      textBoxLeft?: CoreTypes.Point2;    // 左侧角度文本框位置
      textBoxRight?: CoreTypes.Point2;   // 右侧角度文本框位置
    };
    cachedStats?: {
      [targetId: string]: {
        // 左侧圆信息
        centerM1?: CoreTypes.Point3;       // 左侧圆心M1
        radiusLeft?: number;               // 左侧半径

        // 右侧圆信息
        centerM2?: CoreTypes.Point3;       // 右侧圆心M2
        radiusRight?: number;              // 右侧半径

        // 角度信息
        angleLeft?: number;                // 左侧NHA角（度数）
        angleRight?: number;               // 右侧NHA角（度数）

        // 辅助向量（用于绘制角度弧线）
        baselineVector?: CoreTypes.Point3;      // M1-M2基准线向量
        leftTangentVector?: CoreTypes.Point3;   // M1-4切线向量
        rightTangentVector?: CoreTypes.Point3;  // M2-8切线向量
      };
    };
  };
}

// 导出的注解数据接口
export interface ExportedHipNHAAnnotationData {
  points: CoreTypes.Point3[];           // 8个点的世界坐标
  circles: {
    centerM1: CoreTypes.Point3;         // 左侧圆心
    radiusLeft: number;                 // 左侧半径
    centerM2: CoreTypes.Point3;         // 右侧圆心
    radiusRight: number;                // 右侧半径
  };
  angles: {
    angleLeft: number;                  // 左侧NHA角
    angleRight: number;                 // 右侧NHA角
  };
  textBoxPositions?: {
    textBoxLeft?: CoreTypes.Point2;     // 左侧文本框位置
    textBoxRight?: CoreTypes.Point2;    // 右侧文本框位置
  };
  metadata: {
    viewPlaneNormal: CoreTypes.Point3;
    viewUp: CoreTypes.Point3;
    FrameOfReferenceUID: string;
    referencedImageId: string;
  };
}

export default class HipNHAAngleMeasurementTool extends AnnotationTool {
  static toolName = 'HipNHAAngleMeasurementTool';

  editData: {
    annotation: Types.Annotation;
    viewportIdsToRender: string[];
    handleIndex?: number;
    newAnnotation?: boolean;
    hasMoved?: boolean;
    textBoxBeingMoved?: 'Left' | 'Right';  // 正在拖拽的文本框
    textBoxOffset?: CoreTypes.Point2;      // 文本框拖拽时的偏移量
    movingWholeTool?: boolean;             // 是否正在移动整个工具
    wholeToolOffset?: CoreTypes.Point2;    // 移动整个工具时的偏移量
    selected?: boolean;                    // 工具选中状态
  } | null = null;

  isDrawing: boolean = false;

  /**
   * 创建一个预设的注解，带有8个默认点
   * @param element HTML元素
   * @param viewport Viewport实例
   */
  static createDefaultAnnotation(
    element: HTMLDivElement,
    viewport: CoreTypes.IStackViewport | CoreTypes.IVolumeViewport
  ): HipNHAAngleMeasurementAnnotation {
    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      throw new Error('Element is not enabled');
    }

    // 获取viewport的尺寸
    const canvas = viewport.canvas;
    const { width, height } = canvas;
    const centerX = width / 2;
    const centerY = height / 2;

    // 左侧圆：圆心在中心左侧150px，半径60px
    const leftCircleCenter: CoreTypes.Point2 = [centerX - 150, centerY];
    const leftRadius = 60;

    // 右侧圆：圆心在中心右侧150px，半径60px
    const rightCircleCenter: CoreTypes.Point2 = [centerX + 150, centerY];
    const rightRadius = 60;

    // 生成左侧圆上的3个点（120度间隔）
    const leftPoint1: CoreTypes.Point2 = [
      leftCircleCenter[0] + leftRadius * Math.cos(0),
      leftCircleCenter[1] + leftRadius * Math.sin(0)
    ];
    const leftPoint2: CoreTypes.Point2 = [
      leftCircleCenter[0] + leftRadius * Math.cos(Math.PI * 2 / 3),
      leftCircleCenter[1] + leftRadius * Math.sin(Math.PI * 2 / 3)
    ];
    const leftPoint3: CoreTypes.Point2 = [
      leftCircleCenter[0] + leftRadius * Math.cos(Math.PI * 4 / 3),
      leftCircleCenter[1] + leftRadius * Math.sin(Math.PI * 4 / 3)
    ];

    // 左侧髋臼边缘点（在圆心上方）
    const leftAcetabularPoint: CoreTypes.Point2 = [
      leftCircleCenter[0] - 20,
      leftCircleCenter[1] - 80
    ];

    // 生成右侧圆上的3个点（120度间隔）
    const rightPoint1: CoreTypes.Point2 = [
      rightCircleCenter[0] + rightRadius * Math.cos(0),
      rightCircleCenter[1] + rightRadius * Math.sin(0)
    ];
    const rightPoint2: CoreTypes.Point2 = [
      rightCircleCenter[0] + rightRadius * Math.cos(Math.PI * 2 / 3),
      rightCircleCenter[1] + rightRadius * Math.sin(Math.PI * 2 / 3)
    ];
    const rightPoint3: CoreTypes.Point2 = [
      rightCircleCenter[0] + rightRadius * Math.cos(Math.PI * 4 / 3),
      rightCircleCenter[1] + rightRadius * Math.sin(Math.PI * 4 / 3)
    ];

    // 右侧髋臼边缘点（在圆心上方）
    const rightAcetabularPoint: CoreTypes.Point2 = [
      rightCircleCenter[0] + 20,
      rightCircleCenter[1] - 80
    ];

    const canvasPoints: CoreTypes.Point2[] = [
      leftPoint1,           // 点0: 左圆点1
      leftPoint2,           // 点1: 左圆点2
      leftPoint3,           // 点2: 左圆点3
      leftAcetabularPoint,  // 点3: 左侧髋臼边缘点
      rightPoint1,          // 点4: 右圆点1
      rightPoint2,          // 点5: 右圆点2
      rightPoint3,          // 点6: 右圆点3
      rightAcetabularPoint, // 点7: 右侧髋臼边缘点
    ];

    // 转换为world坐标
    const worldPoints = canvasPoints.map((canvasPoint) =>
      viewport.canvasToWorld(canvasPoint)
    );

    const camera = viewport.getCamera();
    const { viewPlaneNormal, viewUp } = camera;
    if (viewPlaneNormal === undefined) {
      throw new Error('viewPlaneNormal is undefined');
    }
    if (viewUp === undefined) {
      throw new Error('viewUp is undefined');
    }

    const annotationData = {
      invalidated: true,
      highlighted: false,
      metadata: {
        viewPlaneNormal: [...viewPlaneNormal] as CoreTypes.Point3,
        viewUp: [...viewUp] as CoreTypes.Point3,
        FrameOfReferenceUID: viewport.getFrameOfReferenceUID(),
        referencedImageId: viewport.getCurrentImageId?.() || '',
        toolName: HipNHAAngleMeasurementTool.toolName,
      },
      data: {
        label: '',
        handles: {
          points: worldPoints,
          activeHandleIndex: null,
        },
        cachedStats: {},
      },
    } as HipNHAAngleMeasurementAnnotation;

    return annotationData;
  }

  /**
   * 导出注解数据
   * @param annotation 要导出的注解
   * @param viewport Viewport实例
   * @returns 导出的数据对象
   */
  static exportAnnotationData(
    annotation: HipNHAAngleMeasurementAnnotation,
    viewport: CoreTypes.IStackViewport | CoreTypes.IVolumeViewport
  ): ExportedHipNHAAnnotationData | null {
    const targetId = `imageId:${viewport.getCurrentImageId?.() || ''}`;
    const cachedStats = annotation.data.cachedStats?.[targetId];

    if (!cachedStats || !cachedStats.centerM1 || !cachedStats.centerM2) {
      return null;
    }

    return {
      points: [...annotation.data.handles.points],
      circles: {
        centerM1: cachedStats.centerM1,
        radiusLeft: cachedStats.radiusLeft || 0,
        centerM2: cachedStats.centerM2,
        radiusRight: cachedStats.radiusRight || 0,
      },
      angles: {
        angleLeft: cachedStats.angleLeft || 0,
        angleRight: cachedStats.angleRight || 0,
      },
      textBoxPositions: {
        textBoxLeft: annotation.data.handles.textBoxLeft,
        textBoxRight: annotation.data.handles.textBoxRight,
      },
      metadata: {
        viewPlaneNormal: annotation.metadata?.viewPlaneNormal || [0, 0, 1],
        viewUp: annotation.metadata?.viewUp || [0, 1, 0],
        FrameOfReferenceUID: annotation.metadata?.FrameOfReferenceUID || '',
        referencedImageId: annotation.metadata?.referencedImageId || '',
      },
    };
  }

  /**
   * 从导出的数据恢复注解
   * @param exportedData 导出的数据
   * @param element HTML元素
   * @param viewport Viewport实例
   * @returns 恢复的注解
   */
  static restoreFromExportedData(
    exportedData: ExportedHipNHAAnnotationData,
    element: HTMLDivElement,
    viewport: CoreTypes.IStackViewport | CoreTypes.IVolumeViewport
  ): HipNHAAngleMeasurementAnnotation {
    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      throw new Error('Element is not enabled');
    }

    const annotationData = {
      invalidated: true,
      highlighted: false,
      metadata: {
        ...exportedData.metadata,
        toolName: HipNHAAngleMeasurementTool.toolName,
      },
      data: {
        label: '',
        handles: {
          points: [...exportedData.points],
          activeHandleIndex: null,
          textBoxLeft: exportedData.textBoxPositions?.textBoxLeft,
          textBoxRight: exportedData.textBoxPositions?.textBoxRight,
        },
        cachedStats: {},
      },
    } as HipNHAAngleMeasurementAnnotation;

    return annotationData;
  }

  constructor(
    toolProps: PublicToolProps = {},
    defaultToolProps: ToolProps = {
      supportedInteractionTypes: ['Mouse', 'Touch'],
      configuration: {
        shadow: true,
        preventHandleOutsideImage: false,
      },
    }
  ) {
    super(toolProps, defaultToolProps);
  }

  /**
   * 设置注解选中状态
   * @param annotation 要设置的注解
   * @param selected 选中状态
   */
  private _setAnnotationSelected(annotation: HipNHAAngleMeasurementAnnotation, selected: boolean): void {
    annotation.isSelected = selected;
    if (selected) {
      annotation.highlighted = true;
    }
  }

  /**
   * 添加新注解 - 禁用此功能
   */
  addNewAnnotation(
    evt: EventTypes.InteractionEventType
  ): HipNHAAngleMeasurementAnnotation {
    evt.preventDefault();
    return {} as HipNHAAngleMeasurementAnnotation;
  }

  /**
   * 计算点到线段的距离
   */
  private _distanceToSegment(
    point: CoreTypes.Point2,
    lineStart: CoreTypes.Point2,
    lineEnd: CoreTypes.Point2
  ): number {
    const x = point[0];
    const y = point[1];
    const x1 = lineStart[0];
    const y1 = lineStart[1];
    const x2 = lineEnd[0];
    const y2 = lineEnd[1];

    const A = x - x1;
    const B = y - y1;
    const C = x2 - x1;
    const D = y2 - y1;

    const dot = A * C + B * D;
    const lenSq = C * C + D * D;
    let param = -1;

    if (lenSq !== 0) {
      param = dot / lenSq;
    }

    let xx, yy;

    if (param < 0) {
      xx = x1;
      yy = y1;
    } else if (param > 1) {
      xx = x2;
      yy = y2;
    } else {
      xx = x1 + param * C;
      yy = y1 + param * D;
    }

    const dx = x - xx;
    const dy = y - yy;

    return Math.sqrt(dx * dx + dy * dy);
  }

  /**
   * 检查点是否靠近工具
   */
  isPointNearTool(
    element: HTMLDivElement,
    annotation: HipNHAAngleMeasurementAnnotation,
    canvasCoords: CoreTypes.Point2,
    proximity: number
  ): boolean {
    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      return false;
    }
    const { viewport } = enabledElement;

    const points = annotation.data.handles.points;
    //检查是否在文本框上
    if (this._isPointInTextBox(canvasCoords, annotation.data.handles.textBoxLeft || [0, 0]) ||
      this._isPointInTextBox(canvasCoords, annotation.data.handles.textBoxRight || [0, 0])) {
      return true;
    }
    // 检查是否靠近任意一个手柄点
    for (let i = 0; i < points.length; i++) {
      const point = points[i];
      const canvasPoint = viewport.worldToCanvas(point);
      const distance = Math.sqrt(
        Math.pow(canvasPoint[0] - canvasCoords[0], 2) +
        Math.pow(canvasPoint[1] - canvasCoords[1], 2)
      );

      if (distance < proximity) {
        return true;
      }
    }

    // 检查是否靠近线段
    if (points.length >= 8) {
      const targetId = this.getTargetId(viewport);
      const cachedStats = targetId ? annotation.data.cachedStats?.[targetId] : undefined;

      if (cachedStats) {
        // 检查基准线 M1-M2
        if (cachedStats.centerM1 && cachedStats.centerM2) {
          const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);
          const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);
          const dist = this._distanceToSegment(canvasCoords, centerM1Canvas, centerM2Canvas);
          if (dist < proximity) {
            return true;
          }
        }

        // 检查左侧切线 M1-point3
        if (cachedStats.centerM1 && points.length > 3) {
          const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);
          const point3Canvas = viewport.worldToCanvas(points[3]);
          const dist = this._distanceToSegment(canvasCoords, centerM1Canvas, point3Canvas);
          if (dist < proximity) {
            return true;
          }
        }

        // 检查右侧切线 M2-point7
        if (cachedStats.centerM2 && points.length > 7) {
          const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);
          const point7Canvas = viewport.worldToCanvas(points[7]);
          const dist = this._distanceToSegment(canvasCoords, centerM2Canvas, point7Canvas);
          if (dist < proximity) {
            return true;
          }
        }
      }
    }

    return false;
  }

  /**
   * 检查点击是否在文本框内
   */
  private _isPointInTextBox(
    canvasPoint: CoreTypes.Point2,
    textBoxPosition: CoreTypes.Point2,
    textWidth: number = 120,
    textHeight: number = 40
  ): boolean {
    const [x, y] = canvasPoint;
    const [tx, ty] = textBoxPosition;

    const margin = 10;
    return (
      x >= tx - margin &&
      x <= tx + textWidth + margin &&
      y >= ty - margin &&
      y <= ty + textHeight + margin
    );
  }

  /**
   * 创建角度弧线的点数组
   */
  private _createAngleArcPoints(
    center: CoreTypes.Point2,
    vector1: CoreTypes.Point2,
    vector2: CoreTypes.Point2,
    radius: number
  ): CoreTypes.Point2[] {
    const angle1 = Math.atan2(vector1[1], vector1[0]);
    const angle2 = Math.atan2(vector2[1], vector2[0]);

    let startAngle = angle1;
    let endAngle = angle2;

    let angleDiff = endAngle - startAngle;
    if (angleDiff > Math.PI) {
      angleDiff -= 2 * Math.PI;
    } else if (angleDiff < -Math.PI) {
      angleDiff += 2 * Math.PI;
    }

    if (angleDiff < 0) {
      [startAngle, endAngle] = [endAngle, startAngle];
      angleDiff = -angleDiff;
    }

    const numPoints = Math.max(10, Math.ceil(Math.abs(angleDiff) / (Math.PI / 18)));
    const points: CoreTypes.Point2[] = [];

    for (let i = 0; i <= numPoints; i++) {
      const t = i / numPoints;
      const angle = startAngle + angleDiff * t;
      const x = center[0] + radius * Math.cos(angle);
      const y = center[1] + radius * Math.sin(angle);
      points.push([x, y]);
    }

    return points;
  }

  /**
   * 取消操作
   */
  cancel(element: HTMLDivElement): string {
    if (this.isDrawing) {
      this.isDrawing = false;
      this._deactivateDraw(element);
      this._deactivateModify(element);

      const enabledElement = getEnabledElement(element);
      if (enabledElement) {
        const viewportIdsToRender =
          utilities.viewportFilters.getViewportIdsWithToolToRender(
            element,
            this.getToolName()
          );

        utilities.triggerAnnotationRenderForViewportIds(
          viewportIdsToRender
        );
      }

      this.editData = null;
      return this.getToolName();
    }

    return '';
  }

  /**
   * 激活绘制模式
   */
  _activateDraw(element: HTMLDivElement): void {
    element.addEventListener(
      'CORNERSTONE_TOOLS_MOUSE_DRAG',
      this._dragCallback as EventListener
    );
    element.addEventListener(
      'CORNERSTONE_TOOLS_MOUSE_UP',
      this._endCallback as EventListener
    );
    element.addEventListener(
      'CORNERSTONE_TOOLS_MOUSE_CLICK',
      this._endCallback as EventListener
    );
  }

  /**
   * 取消激活绘制模式
   */
  _deactivateDraw(element: HTMLDivElement): void {
    element.removeEventListener(
      'CORNERSTONE_TOOLS_MOUSE_DRAG',
      this._dragCallback as EventListener
    );
    element.removeEventListener(
      'CORNERSTONE_TOOLS_MOUSE_UP',
      this._endCallback as EventListener
    );
    element.removeEventListener(
      'CORNERSTONE_TOOLS_MOUSE_CLICK',
      this._endCallback as EventListener
    );
  }

  /**
   * 激活修改模式
   */
  _activateModify(element: HTMLDivElement): void {
    element.addEventListener(
      'CORNERSTONE_TOOLS_MOUSE_DOWN',
      this._mouseDownModifyCallback as EventListener
    );
    element.addEventListener(
      'CORNERSTONE_TOOLS_MOUSE_DRAG',
      this._mouseDragModifyCallback as EventListener
    );
    element.addEventListener(
      'CORNERSTONE_TOOLS_MOUSE_UP',
      this._mouseUpModifyCallback as EventListener
    );
    element.addEventListener(
      'CORNERSTONE_TOOLS_MOUSE_MOVE',
      this._mouseMoveModifyCallback as EventListener
    );
    element.addEventListener(
      'keydown',
      this._keyDownCallback as EventListener
    );
  }

  /**
   * 取消激活修改模式
   */
  _deactivateModify(element: HTMLDivElement): void {
    element.removeEventListener(
      'CORNERSTONE_TOOLS_MOUSE_DOWN',
      this._mouseDownModifyCallback as EventListener
    );
    element.removeEventListener(
      'CORNERSTONE_TOOLS_MOUSE_DRAG',
      this._mouseDragModifyCallback as EventListener
    );
    element.removeEventListener(
      'CORNERSTONE_TOOLS_MOUSE_UP',
      this._mouseUpModifyCallback as EventListener
    );
    element.removeEventListener(
      'CORNERSTONE_TOOLS_MOUSE_MOVE',
      this._mouseMoveModifyCallback as EventListener
    );
    element.removeEventListener(
      'keydown',
      this._keyDownCallback as EventListener
    );
  }

  /**
   * 鼠标按下回调 - 用于修改模式
   */
  _mouseDownModifyCallback = (evt: EventTypes.InteractionEventType): void => {
    const eventDetail = evt.detail;
    const { element, currentPoints } = eventDetail;
    const canvasCoords = currentPoints.canvas;

    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      return;
    }
    const { viewport } = enabledElement;

    const annotations = annotation.state.getAnnotations(this.getToolName(), element);

    if (!annotations || annotations.length === 0) {
      return;
    }

    // 先检查是否点击在文本框上
    for (const ann of annotations) {
      const customAnn = ann as HipNHAAngleMeasurementAnnotation;
      const targetId = this.getTargetId(viewport);
      const cachedStats = targetId ? customAnn.data.cachedStats?.[targetId] : undefined;

      if (cachedStats?.centerM1) {
        const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);
        const textBoxLeft: CoreTypes.Point2 = customAnn.data.handles.textBoxLeft || [
          centerM1Canvas[0] - 60,
          centerM1Canvas[1] - 50,
        ];

        if (this._isPointInTextBox(canvasCoords, textBoxLeft)) {
          const viewportIdsToRender =
            utilities.viewportFilters.getViewportIdsWithToolToRender(
              element,
              this.getToolName()
            );

          const textBoxOffset: CoreTypes.Point2 = [
            canvasCoords[0] - textBoxLeft[0],
            canvasCoords[1] - textBoxLeft[1],
          ];

          this.editData = {
            annotation: customAnn,
            viewportIdsToRender,
            hasMoved: false,
            textBoxBeingMoved: 'Left',
            textBoxOffset: textBoxOffset,
          };

          customAnn.highlighted = true;
          utilities.triggerAnnotationRenderForViewportIds(viewportIdsToRender);

          evt.preventDefault();
          evt.stopPropagation();
          return;
        }
      }

      if (cachedStats?.centerM2) {
        const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);
        const textBoxRight: CoreTypes.Point2 = customAnn.data.handles.textBoxRight || [
          centerM2Canvas[0] + 20,
          centerM2Canvas[1] - 50,
        ];

        if (this._isPointInTextBox(canvasCoords, textBoxRight)) {
          const viewportIdsToRender =
            utilities.viewportFilters.getViewportIdsWithToolToRender(
              element,
              this.getToolName()
            );

          const textBoxOffset: CoreTypes.Point2 = [
            canvasCoords[0] - textBoxRight[0],
            canvasCoords[1] - textBoxRight[1],
          ];

          this.editData = {
            annotation: customAnn,
            viewportIdsToRender,
            hasMoved: false,
            textBoxBeingMoved: 'Right',
            textBoxOffset: textBoxOffset,
          };

          customAnn.highlighted = true;
          utilities.triggerAnnotationRenderForViewportIds(viewportIdsToRender);

          evt.preventDefault();
          evt.stopPropagation();
          return;
        }
      }
    }

    // 如果没有点击文本框，再查找最近的手柄
    for (const ann of annotations) {
      const customAnn = ann as HipNHAAngleMeasurementAnnotation;
      const handle = this.getHandleNearImagePoint(
        element,
        customAnn,
        canvasCoords,
        6
      );

      if (handle) {
        const viewportIdsToRender =
          utilities.viewportFilters.getViewportIdsWithToolToRender(
            element,
            this.getToolName()
          );

        // 选中工具
        this._setAnnotationSelected(customAnn, true);

        this.editData = {
          annotation: customAnn,
          viewportIdsToRender,
          handleIndex: customAnn.data.handles.activeHandleIndex || 0,
          hasMoved: false,
        };

        customAnn.highlighted = true;

        utilities.triggerAnnotationRenderForViewportIds(
          viewportIdsToRender
        );

        evt.preventDefault();
        evt.stopPropagation();
        return;
      }
    }

    // 如果没有找到手柄，检查是否点击在线段上（开始移动整个工具）
    for (const ann of annotations) {
      const customAnn = ann as HipNHAAngleMeasurementAnnotation;
      if (this.isPointNearTool(element, customAnn, canvasCoords, 10)) {
        const viewportIdsToRender =
          utilities.viewportFilters.getViewportIdsWithToolToRender(
            element,
            this.getToolName()
          );

        // 选中工具
        this._setAnnotationSelected(customAnn, true);

        // 计算鼠标点击位置相对于工具的偏移量
        const points = customAnn.data.handles.points;
        if (points.length >= 8) {
          const midPoint = vectorAdd(points[0], vectorScale(vectorSubtract(points[1], points[0]), 0.5));
          const midCanvas = viewport.worldToCanvas(midPoint);
          const wholeToolOffset: CoreTypes.Point2 = [
            canvasCoords[0] - midCanvas[0],
            canvasCoords[1] - midCanvas[1],
          ];

          this.editData = {
            annotation: customAnn,
            viewportIdsToRender,
            hasMoved: false,
            movingWholeTool: true,
            wholeToolOffset: wholeToolOffset,
          };

          customAnn.highlighted = true;

          utilities.triggerAnnotationRenderForViewportIds(
            viewportIdsToRender
          );

          evt.preventDefault();
          evt.stopPropagation();
          return;
        }
      }
    }
  };

  /**
   * 鼠标拖拽回调 - 用于修改模式
   */
  _mouseDragModifyCallback = (evt: EventTypes.InteractionEventType): void => {
    if (!this.editData) {
      return;
    }

    const eventDetail = evt.detail;
    const { currentPoints } = eventDetail;
    const canvasCoords = currentPoints.canvas;

    const enabledElement = getEnabledElement(eventDetail.element);
    if (!enabledElement) {
      return;
    }

    const { annotation: ann, viewportIdsToRender, textBoxBeingMoved, movingWholeTool } = this.editData;
    const customAnn = ann as HipNHAAngleMeasurementAnnotation;
    const { data } = customAnn;

    // 如果正在拖拽文本框
    if (textBoxBeingMoved && this.editData.textBoxOffset) {
      const newTextBoxPosition: CoreTypes.Point2 = [
        canvasCoords[0] - this.editData.textBoxOffset[0],
        canvasCoords[1] - this.editData.textBoxOffset[1],
      ];

      if (textBoxBeingMoved === 'Left') {
        data.handles.textBoxLeft = newTextBoxPosition;
      } else if (textBoxBeingMoved === 'Right') {
        data.handles.textBoxRight = newTextBoxPosition;
      }

      this.editData.hasMoved = true;

      utilities.triggerAnnotationRenderForViewportIds(
        viewportIdsToRender
      );

      evt.preventDefault();
      evt.stopPropagation();
      return;
    }

    // 如果正在移动整个工具
    if (movingWholeTool && this.editData.wholeToolOffset) {
      // 计算新的中点位置
      const newMidCanvas: CoreTypes.Point2 = [
        canvasCoords[0] - this.editData.wholeToolOffset[0],
        canvasCoords[1] - this.editData.wholeToolOffset[1],
      ];
      const newMidWorld = enabledElement.viewport.canvasToWorld(newMidCanvas);

      // 计算所有点的偏移量
      const points = data.handles.points;
      if (points.length >= 8) {
        const oldMid = vectorAdd(points[0], vectorScale(vectorSubtract(points[1], points[0]), 0.5));
        const offset = vectorSubtract(newMidWorld, oldMid);

        // 移动所有点
        for (let i = 0; i < points.length; i++) {
          points[i] = vectorAdd(points[i], offset);
        }

        // 移动文本框位置（使用相同的偏移量）
        if (data.handles.textBoxLeft) {
          data.handles.textBoxLeft = [
            data.handles.textBoxLeft[0] + offset[0],
            data.handles.textBoxLeft[1] + offset[1]
          ];
        }
        if (data.handles.textBoxRight) {
          data.handles.textBoxRight = [
            data.handles.textBoxRight[0] + offset[0],
            data.handles.textBoxRight[1] + offset[1]
          ];
        }

        // 重新计算角度
        this._updateCachedStats(customAnn, enabledElement);

        this.editData.hasMoved = true;

        // 触发渲染更新
        utilities.triggerAnnotationRenderForViewportIds(
          viewportIdsToRender
        );

        evt.preventDefault();
        evt.stopPropagation();
        return;
      }
    }

    // 否则处理手柄拖拽
    const worldPos = currentPoints.world;
    const activeHandleIndex = data.handles.activeHandleIndex;

    if (activeHandleIndex !== null && activeHandleIndex >= 0 && activeHandleIndex < data.handles.points.length) {
      data.handles.points[activeHandleIndex] = worldPos;

      this._updateCachedStats(customAnn, enabledElement);

      this.editData.hasMoved = true;

      utilities.triggerAnnotationRenderForViewportIds(
        viewportIdsToRender
      );

      evt.preventDefault();
      evt.stopPropagation();
    }
  };

  /**
   * 鼠标释放回调 - 用于修改模式
   */
  _mouseUpModifyCallback = (evt: EventTypes.InteractionEventType): void => {
    if (!this.editData) {
      return;
    }

    const eventDetail = evt.detail;
    const { element, currentPoints } = eventDetail;
    const canvasCoords = currentPoints.canvas;

    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      return;
    }
    const { viewport } = enabledElement;

    const { annotation: ann, hasMoved, movingWholeTool } = this.editData;
    const customAnn = ann as HipNHAAngleMeasurementAnnotation;

    customAnn.data.handles.activeHandleIndex = null;

    // 如果没有拖拽且点击在线段上（movingWholeTool为true），则进入选中状态
    if (!hasMoved && movingWholeTool) {
      // 设置选中状态：使用注解的selected字段
      this._setAnnotationSelected(customAnn, true);
      // 保持高亮以显示选中
      customAnn.highlighted = true;
    } else {
      customAnn.highlighted = false;
    }

    // 如果是简单点击（没有移动），检查是否点击到其他位置以取消选中
    if (!hasMoved) {
      const annotations = annotation.state.getAnnotations(this.getToolName(), element);

      // 检查是否点击到任何工具部分
      let clickedOnTool = false;
      for (const ann of annotations) {
        const customAnn = ann as HipNHAAngleMeasurementAnnotation;

        // 检查点击位置是否在工具范围内
        if (this.isPointNearTool(element, customAnn, canvasCoords, 25)) {
          clickedOnTool = true;
          break;
        }

        // 检查是否在文本框范围内
        const targetId = this.getTargetId(viewport);
        const cachedStats = targetId ? customAnn.data.cachedStats?.[targetId] : undefined;

        if (cachedStats?.centerM1) {
          const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);
          const textBoxLeft: CoreTypes.Point2 = customAnn.data.handles.textBoxLeft || [
            centerM1Canvas[0] - 60,
            centerM1Canvas[1] - 50,
          ];

          if (this._isPointInTextBox(canvasCoords, textBoxLeft)) {
            clickedOnTool = true;
            break;
          }
        }

        if (cachedStats?.centerM2) {
          const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);
          const textBoxRight: CoreTypes.Point2 = customAnn.data.handles.textBoxRight || [
            centerM2Canvas[0] + 20,
            centerM2Canvas[1] - 50,
          ];

          if (this._isPointInTextBox(canvasCoords, textBoxRight)) {
            clickedOnTool = true;
            break;
          }
        }
      }

      // 如果没有点击到任何工具，清除所有选中状态
      if (!clickedOnTool) {
        for (const ann of annotations) {
          const customAnn = ann as HipNHAAngleMeasurementAnnotation;
          this._setAnnotationSelected(customAnn, false);
          customAnn.highlighted = false;
        }
      }
    }

    const viewportIdsToRender =
      utilities.viewportFilters.getViewportIdsWithToolToRender(
        element,
        this.getToolName()
      );

    utilities.triggerAnnotationRenderForViewportIds(
      viewportIdsToRender
    );

    this.editData = null;

    evt.preventDefault();
    evt.stopPropagation();
  };

  /**
   * 鼠标移动回调 - 用于修改模式，处理悬停检测
   * 实现功能1和2：鼠标悬停在文本上时光标为手型，悬停在线段或手柄上时光标为十字准星
   */
  _mouseMoveModifyCallback = (evt: EventTypes.InteractionEventType): void => {
    const eventDetail = evt.detail;
    const { element, currentPoints } = eventDetail;
    // 添加空值检查
    if (!currentPoints || !currentPoints.canvas) {
      return;
    }
    const canvasCoords = currentPoints.canvas;

    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      return;
    }
    const { viewport } = enabledElement;

    const annotations = annotation.state.getAnnotations(this.getToolName(), element);
    if (!annotations || annotations.length === 0) {
      // 没有注解时，重置光标
      element.style.cursor = 'default';
      return;
    }

    let isHovering = false;

    // 检查是否悬停在文本框上
    for (const ann of annotations) {
      const customAnn = ann as HipNHAAngleMeasurementAnnotation;
      const targetId = this.getTargetId(viewport);
      const cachedStats = targetId ? customAnn.data.cachedStats?.[targetId] : undefined;

      if (cachedStats?.centerM1) {
        const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);
        const textBoxLeft: CoreTypes.Point2 = customAnn.data.handles.textBoxLeft || [
          centerM1Canvas[0] - 60,
          centerM1Canvas[1] - 50,
        ];

        if (this._isPointInTextBox(canvasCoords, textBoxLeft)) {
          element.style.cursor = 'pointer'; // 手型光标
          customAnn.highlighted = true;
          isHovering = true;
          break;
        }
      }

      if (cachedStats?.centerM2) {
        const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);
        const textBoxRight: CoreTypes.Point2 = customAnn.data.handles.textBoxRight || [
          centerM2Canvas[0] + 20,
          centerM2Canvas[1] - 50,
        ];

        if (this._isPointInTextBox(canvasCoords, textBoxRight)) {
          element.style.cursor = 'pointer'; // 手型光标
          customAnn.highlighted = true;
          isHovering = true;
          break;
        }
      }
    }

    // 如果没有悬停在文本框上，检查是否悬停在手柄或线段上
    if (!isHovering) {
      for (const ann of annotations) {
        const customAnn = ann as HipNHAAngleMeasurementAnnotation;

        // 检查是否靠近手柄
        const handle = this.getHandleNearImagePoint(element, customAnn, canvasCoords, 6);
        if (handle) {
          element.style.cursor = 'crosshair'; // 十字准星光标
          customAnn.highlighted = true;
          isHovering = true;
          break;
        }

        // 检查是否靠近线段（圆弧路径）
        if (this.isPointNearTool(element, customAnn, canvasCoords, 10)) {
          element.style.cursor = 'crosshair'; // 十字准星光标
          customAnn.highlighted = true;
          isHovering = true;
          break;
        }
      }
    }

    // 如果没有悬停在任何地方，重置高亮（但保留选中状态）
    if (!isHovering) {
      for (const ann of annotations) {
        const customAnn = ann as HipNHAAngleMeasurementAnnotation;
        // 只有未选中的工具才重置 highlighted
        // 已选中的工具保持 highlighted = true
        if (!customAnn.isSelected) {
          customAnn.highlighted = false;
        }
      }
      element.style.cursor = 'default';
    }

    // 触发渲染以更新高亮状态
    const viewportIdsToRender = utilities.viewportFilters.getViewportIdsWithToolToRender(
      element,
      this.getToolName()
    );
    utilities.triggerAnnotationRenderForViewportIds(viewportIdsToRender);
  };

  /**
   * 键盘按下回调 - 处理Delete键删除选中注解
   */
  _keyDownCallback = (evt: KeyboardEvent): void => {
    const element = evt.currentTarget as HTMLDivElement;
    
    // 检查是否按下 Delete 或 Backspace 键
    if (evt.key === 'Delete' || evt.key === 'Backspace') {
      const enabledElement = getEnabledElement(element);
      if (!enabledElement) {
        return;
      }

      const annotations = annotation.state.getAnnotations(this.getToolName(), element);
      if (!annotations || annotations.length === 0) {
        return;
      }

      // 查找被选中的注解
      const selectedAnnotations = annotations.filter(
        (ann) => (ann as HipNHAAngleMeasurementAnnotation).isSelected
      );

      if (selectedAnnotations.length === 0) {
        return;
      }

      // 删除所有选中的注解
      for (const ann of selectedAnnotations) {
        annotation.state.removeAnnotation(ann.annotationUID!);
      }

      // 触发渲染更新
      const viewportIdsToRender =
        utilities.viewportFilters.getViewportIdsWithToolToRender(
          element,
          this.getToolName()
        );

      utilities.triggerAnnotationRenderForViewportIds(viewportIdsToRender);

      evt.preventDefault();
      evt.stopPropagation();
    }
  };

  /**
   * 处理选中回调
   */
  handleSelectedCallback(
    evt: EventTypes.InteractionEventType,
    annotation: HipNHAAngleMeasurementAnnotation
  ): void {
    const eventDetail = evt.detail;
    const { element } = eventDetail;

    annotation.highlighted = true;

    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      return;
    }
    const viewportIdsToRender =
      utilities.viewportFilters.getViewportIdsWithToolToRender(
        element,
        this.getToolName()
      );

    utilities.triggerAnnotationRenderForViewportIds(
      viewportIdsToRender
    );

    evt.preventDefault();
  }

  /**
   * 工具选中回调
   */
  toolSelectedCallback(
    evt: EventTypes.InteractionEventType,
    annotation: HipNHAAngleMeasurementAnnotation
  ): void {
    // 实现工具选中逻辑
  }

  /**
   * 处理鼠标拖拽
   */
  _dragCallback = (evt: EventTypes.InteractionEventType): void => {
    this.isDrawing = true;
    const eventDetail = evt.detail;
    const { element } = eventDetail;

    const enabledElement = getEnabledElement(element);
    if (!enabledElement || !this.editData) {
      return;
    }

    const { annotation, viewportIdsToRender } = this.editData;
    const { data } = annotation as HipNHAAngleMeasurementAnnotation;

    if (annotation) {
      const { currentPoints } = eventDetail;
      const worldPos = currentPoints.world;

      const points = data.handles.points;
      const activeHandleIndex = data.handles.activeHandleIndex;

      if (activeHandleIndex !== null && activeHandleIndex < points.length) {
        points[activeHandleIndex] = worldPos;

        this._updateCachedStats(
          annotation as HipNHAAngleMeasurementAnnotation,
          enabledElement
        );

        this.editData!.hasMoved = true;
      } else if (this.editData!.newAnnotation) {
        const lastIndex = points.length - 1;
        if (lastIndex >= 0) {
          points[lastIndex] = worldPos;
        }
      }

      utilities.triggerAnnotationRenderForViewportIds(
        viewportIdsToRender
      );
    }
  };

  /**
   * 处理鼠标抬起/点击
   */
  _endCallback = (evt: EventTypes.InteractionEventType): void => {
    const eventDetail = evt.detail;
    const { element } = eventDetail;

    if (!this.editData) {
      return;
    }

    const { annotation, hasMoved } = this.editData;
    const { data } = annotation as HipNHAAngleMeasurementAnnotation;

    if (hasMoved) {
      this.editData.hasMoved = false;
    }

    data.handles.activeHandleIndex = null;
  };

  /**
   * 获取靠近图像点的手柄
   */
  getHandleNearImagePoint(
    element: HTMLDivElement,
    annotation: HipNHAAngleMeasurementAnnotation,
    canvasCoords: CoreTypes.Point2,
    proximity: number
  ): Types.ToolHandle | undefined {
    const enabledElement = getEnabledElement(element);
    if (!enabledElement) {
      return undefined;
    }
    const { viewport } = enabledElement;

    const points = annotation.data.handles.points;

    const handleProximity = Math.max(proximity, 15);

    for (let i = 0; i < points.length; i++) {
      const point = points[i];
      const canvasPoint = viewport.worldToCanvas(point);
      const distance = Math.sqrt(
        Math.pow(canvasPoint[0] - canvasCoords[0], 2) +
        Math.pow(canvasPoint[1] - canvasCoords[1], 2)
      );

      if (distance < handleProximity) {
        annotation.data.handles.activeHandleIndex = i;
        return {
          worldPosition: point,
        } as Types.ToolHandle;
      }
    }

    annotation.data.handles.activeHandleIndex = null;
    return undefined;
  }

  /**
   * 更新缓存的统计数据
   */
  _updateCachedStats(
    annotation: HipNHAAngleMeasurementAnnotation,
    enabledElement: CoreTypes.IEnabledElement
  ): void {
    const { viewport } = enabledElement;
    const { data } = annotation;
    const points = data.handles.points;

    const targetId = this.getTargetId(viewport);
    if (!targetId) {
      return;
    }

    if (!data.cachedStats) {
      data.cachedStats = {};
    }

    if (!data.cachedStats[targetId]) {
      data.cachedStats[targetId] = {};
    }

    const stats = data.cachedStats[targetId];

    if (points.length >= 8) {
      // 拟合左侧圆（点0, 1, 2）
      const leftCircleResult = fitCircleFrom3Points(points[0], points[1], points[2]);

      if (leftCircleResult) {
        stats.centerM1 = leftCircleResult.center;
        stats.radiusLeft = leftCircleResult.radius;
      }

      // 拟合右侧圆（点4, 5, 6）
      const rightCircleResult = fitCircleFrom3Points(points[4], points[5], points[6]);

      if (rightCircleResult) {
        stats.centerM2 = rightCircleResult.center;
        stats.radiusRight = rightCircleResult.radius;
      }

      // 如果两个圆都拟合成功，计算角度
      if (stats.centerM1 && stats.centerM2) {
        // 基准线向量 M1 -> M2
        stats.baselineVector = vectorSubtract(stats.centerM2, stats.centerM1);

        // 左侧切线向量 M1 -> point3
        stats.leftTangentVector = vectorSubtract(points[3], stats.centerM1);

        // 右侧切线向量 M2 -> point7
        stats.rightTangentVector = vectorSubtract(points[7], stats.centerM2);

        // 计算左侧NHA角
        const leftAngleRad = getAngleBetweenLines(
          stats.baselineVector,
          stats.leftTangentVector
        );
        stats.angleLeft = Math.round(degrees(leftAngleRad));

        // 计算右侧NHA角
        const rightAngleRad = getAngleBetweenLines(
          stats.baselineVector,
          calculateOppositeVector(stats.rightTangentVector)
        );
        stats.angleRight = Math.round(degrees(rightAngleRad));
      }
    }
  }

  /**
   * 渲染注解
   */
  renderAnnotation = (
    enabledElement: CoreTypes.IEnabledElement,
    svgDrawingHelper: SVGDrawingHelper
  ): boolean => {
    let renderStatus = false;
    const { viewport } = enabledElement;
    const { element } = viewport;

    let annotations = annotation.state.getAnnotations(this.getToolName(), element);

    if (!annotations?.length) {
      return renderStatus;
    }

    for (let i = 0; i < annotations.length; i++) {
      const ann = annotations[i] as HipNHAAngleMeasurementAnnotation;
      const { annotationUID, data } = ann;
      const points = data.handles.points;

      if (points.length < 1) {
        continue;
      }

      const targetId = this.getTargetId(viewport);
      const cachedStats = targetId ? data.cachedStats?.[targetId] : undefined;

      // 转换所有点为 canvas 坐标
      const canvasPoints = points.map((p) => viewport.worldToCanvas(p));

      // 确定颜色（选中时蓝色，未选中时白色）
      const mainColor = ann.highlighted ? 'rgb(0, 120, 255)' : 'rgb(255, 255, 255)';

      // 根据选中或悬停状态调整手柄半径：选中或悬停时为12，否则为8
      const isHighlighted = ann.isSelected || ann.highlighted;
      const handleRadius = isHighlighted ? 12 : 8;

      // 1. 绘制8个手柄点
      if (annotationUID) {
        const handleGroupUID = '0';
        drawHandles(
          svgDrawingHelper,
          annotationUID,
          handleGroupUID,
          canvasPoints,
          {
            color: 'rgb(255, 255, 255)',
            handleRadius: handleRadius,
          }
        );
      }

      // 如果缓存统计数据存在，绘制圆和线
      if (cachedStats && annotationUID) {
        // 2. 绘制左侧股骨头圆
        if (cachedStats.centerM1 && cachedStats.radiusLeft) {
          const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);

          // 计算像素半径
          const pointOnCircle: CoreTypes.Point3 = [
            cachedStats.centerM1[0] + cachedStats.radiusLeft,
            cachedStats.centerM1[1],
            cachedStats.centerM1[2]
          ];
          const pointOnCircleCanvas = viewport.worldToCanvas(pointOnCircle);
          const radiusPixels = Math.abs(pointOnCircleCanvas[0] - centerM1Canvas[0]);

          drawCircleSvg(
            svgDrawingHelper,
            annotationUID,
            'leftCircle',
            centerM1Canvas,
            radiusPixels,
            {
              color: mainColor,
              width: 2,
            }
          );
        }

        // 3. 绘制右侧股骨头圆
        if (cachedStats.centerM2 && cachedStats.radiusRight) {
          const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);

          // 计算像素半径
          const pointOnCircle: CoreTypes.Point3 = [
            cachedStats.centerM2[0] + cachedStats.radiusRight,
            cachedStats.centerM2[1],
            cachedStats.centerM2[2]
          ];
          const pointOnCircleCanvas = viewport.worldToCanvas(pointOnCircle);
          const radiusPixels = Math.abs(pointOnCircleCanvas[0] - centerM2Canvas[0]);

          drawCircleSvg(
            svgDrawingHelper,
            annotationUID,
            'rightCircle',
            centerM2Canvas,
            radiusPixels,
            {
              color: mainColor,
              width: 2,
            }
          );
        }

        // 4. 绘制基准线 M1-M2
        if (cachedStats.centerM1 && cachedStats.centerM2) {
          const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);
          const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);

          drawLineSvg(
            svgDrawingHelper,
            annotationUID,
            'baseline',
            centerM1Canvas,
            centerM2Canvas,
            {
              color: mainColor,
              width: 2,
            }
          );
        }

        // 5. 绘制左侧切线 M1-point3
        if (cachedStats.centerM1 && points.length > 3) {
          const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);
          const point3Canvas = viewport.worldToCanvas(points[3]);

          drawLineSvg(
            svgDrawingHelper,
            annotationUID,
            'leftTangent',
            centerM1Canvas,
            point3Canvas,
            {
              color: mainColor,
              width: 2,
            }
          );
        }

        // 6. 绘制右侧切线 M2-point7
        if (cachedStats.centerM2 && points.length > 7) {
          const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);
          const point7Canvas = viewport.worldToCanvas(points[7]);

          drawLineSvg(
            svgDrawingHelper,
            annotationUID,
            'rightTangent',
            centerM2Canvas,
            point7Canvas,
            {
              color: mainColor,
              width: 2,
            }
          );
        }

        // 7. 绘制左侧角度弧线和文本
        if (
          cachedStats.centerM1 &&
          cachedStats.baselineVector &&
          cachedStats.leftTangentVector &&
          cachedStats.angleLeft !== undefined
        ) {
          const centerM1Canvas = viewport.worldToCanvas(cachedStats.centerM1);

          // 绘制角度弧线
          const leftArcPoints = this._createAngleArcPoints(
            centerM1Canvas,
            [cachedStats.baselineVector[0], cachedStats.baselineVector[1]],
            [cachedStats.leftTangentVector[0], cachedStats.leftTangentVector[1]],
            40
          );

          drawPathSvg(
            svgDrawingHelper,
            annotationUID,
            'leftArc',
            leftArcPoints,
            {
              color: mainColor,
              width: 1,
              lineDash: '4,4',
            }
          );

          // 绘制左侧角度文本框
          const textBoxLeft: CoreTypes.Point2 = data.handles.textBoxLeft || [
            centerM1Canvas[0] - 60,
            centerM1Canvas[1] - 50,
          ];

          drawLinkedTextBox(
            svgDrawingHelper,
            annotationUID,
            'leftAngleText',
            [`左侧NHA: ${cachedStats.angleLeft}°`],
            textBoxLeft,
            [centerM1Canvas],
            {},
            {
              color: mainColor,
            }
          );
        }

        // 8. 绘制右侧角度弧线和文本
        if (
          cachedStats.centerM2 &&
          cachedStats.baselineVector &&
          cachedStats.rightTangentVector &&
          cachedStats.angleRight !== undefined
        ) {
          const centerM2Canvas = viewport.worldToCanvas(cachedStats.centerM2);

          // 绘制角度弧线
          const rightArcPoints = this._createAngleArcPoints(
            centerM2Canvas,
            [-cachedStats.baselineVector[0], -cachedStats.baselineVector[1]],
            [cachedStats.rightTangentVector[0], cachedStats.rightTangentVector[1]],
            40
          );

          drawPathSvg(
            svgDrawingHelper,
            annotationUID,
            'rightArc',
            rightArcPoints,
            {
              color: mainColor,
              width: 1,
              lineDash: '4,4',
            }
          );

          // 绘制右侧角度文本框
          const textBoxRight: CoreTypes.Point2 = data.handles.textBoxRight || [
            centerM2Canvas[0] + 20,
            centerM2Canvas[1] - 50,
          ];

          drawLinkedTextBox(
            svgDrawingHelper,
            annotationUID,
            'rightAngleText',
            [`右侧NHA: ${cachedStats.angleRight}°`],
            textBoxRight,
            [centerM2Canvas],
            {},
            {
              color: mainColor,
            }
          );
        }
      }

      renderStatus = true;
    }

    return renderStatus;
  };
}