// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-nocheck -- OL 패키지 제거됨 (기능 미사용, Session G 패스)
/**
 * 원(Circle) 리사이즈 커스텀 인터랙션
 *
 * 원은 64점 Polygon으로 저장되어 있으므로, 테두리 드래그 시
 * 중심에서 드래그 좌표까지의 거리를 새 반지름으로 계산하고
 * fromCircle()로 Polygon을 재생성.
 *
 * 감지 방식: 개별 꼭짓점이 아닌, 중심~포인터 거리와 반지름 비교 (테두리 전체 감지)
 */
import PointerInteraction from 'ol/interaction/Pointer';
import { fromCircle } from 'ol/geom/Polygon';
import OlCircle from 'ol/geom/Circle';
import type Feature from 'ol/Feature';
import type { Polygon } from 'ol/geom';
import type MapBrowserEvent from 'ol/MapBrowserEvent';
import type OlMap from 'ol/Map';

const PIXEL_TOLERANCE = 16;
const MIN_RADIUS = 100; // 최소 반지름 (미터)

interface CircleResizeInteractionOptions {
  feature: Feature<Polygon>;
  center: [number, number]; // EPSG:3857 [x, y]
  onResize?: (feature: Feature<Polygon>) => void;
}

interface HandleResult {
  cursor: string;
}

export default class CircleResizeInteraction extends PointerInteraction {
  private feature_: Feature<Polygon>;
  private center_: [number, number];
  private onResize_: ((feature: Feature<Polygon>) => void) | null;
  private dragging_: boolean;

  constructor(options: CircleResizeInteractionOptions) {
    super({
      handleDownEvent: (evt: MapBrowserEvent<PointerEvent>) => CircleResizeInteraction.prototype._handleDown.call(this, evt),
      handleDragEvent: (evt: MapBrowserEvent<PointerEvent>) => CircleResizeInteraction.prototype._handleDrag.call(this, evt),
      handleUpEvent: () => CircleResizeInteraction.prototype._handleUp.call(this),
    });
    this.feature_ = options.feature;
    this.center_ = options.center; // EPSG:3857 [x, y]
    this.onResize_ = options.onResize || null;
    this.dragging_ = false;
  }

  /** 중심~포인터 픽셀 거리와 표시 반지름 비교 */
  private _isNearEdge(map: OlMap, pixel: number[]): boolean {
    const centerPixel = map.getPixelFromCoordinate(this.center_);
    const coords = this.feature_.getGeometry()!.getCoordinates()[0];
    const edgePixel = map.getPixelFromCoordinate(coords[0]);
    const radiusPixels = Math.hypot(
      edgePixel[0] - centerPixel[0],
      edgePixel[1] - centerPixel[1],
    );
    const distFromCenter = Math.hypot(
      pixel[0] - centerPixel[0],
      pixel[1] - centerPixel[1],
    );
    return Math.abs(distFromCenter - radiusPixels) < PIXEL_TOLERANCE;
  }

  private _handleDown(evt: MapBrowserEvent<PointerEvent>): boolean {
    if (this._isNearEdge(evt.map, evt.pixel as unknown as number[])) {
      this.dragging_ = true;
      return true;
    }
    return false;
  }

  private _handleDrag(evt: MapBrowserEvent<PointerEvent>): void {
    if (!this.dragging_) return;
    const coord = evt.coordinate;
    const dx = coord[0] - this.center_[0];
    const dy = coord[1] - this.center_[1];
    const newRadius = Math.max(Math.sqrt(dx * dx + dy * dy), MIN_RADIUS);

    const circleGeom = new OlCircle(this.center_, newRadius);
    const polyGeom = fromCircle(circleGeom, 64);
    this.feature_.setGeometry(polyGeom);
  }

  private _handleUp(): boolean {
    if (this.dragging_) {
      this.dragging_ = false;
      if (this.onResize_) this.onResize_(this.feature_);
      return true;
    }
    return false;
  }

  /** 외부에서 center 업데이트 (Translate 후) */
  setCenter(center: [number, number]): void {
    this.center_ = center;
  }

  /**
   * 호버 감지: 픽셀이 리사이즈 핸들(테두리) 위인지 확인
   */
  isOverHandle(map: OlMap, pixel: number[]): HandleResult | null {
    if (this._isNearEdge(map, pixel)) {
      return { cursor: 'nesw-resize' };
    }
    return null;
  }
}