// import {BaseSopOperation} from './_Base';
// import {CoreGroup} from '../../../core/geometry/Group';
// import {Mesh} from 'three';
// import {BufferGeometry} from 'three';
// import {Object3D} from 'three';
// import {CoreLoaderGeometry, GeometryFormat} from '../../../core/loader/Geometry';
// import {ASSETS_ROOT} from '../../../core/loader/AssetsUtils';
// import {PolyScene} from '../../scene/PolyScene';
// import {BaseNodeType} from '../../nodes/_Base';
// import {DefaultOperationParams} from '../../../core/operations/_Base';

// interface FileSopParams extends DefaultOperationParams {
// 	url: string;
// 	format: string;
// 	matrixAutoUpdate: boolean;
// }

// export class FileSopOperation extends BaseSopOperation {
// 	static override readonly DEFAULT_PARAMS: FileSopParams = {
// 		url: `${ASSETS_ROOT}/models/wolf.obj`,
// 		format: GeometryFormat.AUTO,
// 		matrixAutoUpdate: false,
// 	};
// 	static override type(): Readonly<'file'> {
// 		return 'file';
// 	}

// 	static loader(params: FileSopParams, scene: PolyScene, node: BaseNodeType) {
// 		return new CoreLoaderGeometry({url: params.url, format: params.format as GeometryFormat}, scene, node);
// 	}

// 	override cook(input_contents: CoreGroup[], params: FileSopParams): CoreGroup | Promise<CoreGroup> {
// 		if (!this._node) {
// 			return this.createCoreGroupFromObjects([]);
// 		}
// 		const loader = FileSopOperation.loader(params, this.scene(), this._node);

// 		return new Promise((resolve) => {
// 			loader.load(
// 				(objects: Object3D[]) => {
// 					const new_objects = this._onLoad(objects, params);
// 					resolve(this.createCoreGroupFromObjects(new_objects));
// 				},
// 				(message: string) => {
// 					this._onError(message, params);
// 				}
// 			);
// 		});
// 	}
// 	// clearLoadedBlob(params: FileSopParams) {
// 	// 	const loader = FileSopOperation.loader(params, this.scene(), this._node);
// 	// 	loader.deregisterUrl();
// 	// }

// 	private _onLoad(objects: Object3D[], params: FileSopParams) {
// 		// .flat() is overzealous and could break the hierarchy
// 		// objects = objects.flat();

// 		for (let object of objects) {
// 			object.traverse((child) => {
// 				this._ensureGeometryHasIndex(child);
// 				if (!params.matrixAutoUpdate) {
// 					child.updateMatrix();
// 				}
// 				child.matrixAutoUpdate = params.matrixAutoUpdate;
// 			});
// 		}
// 		return objects;
// 	}
// 	private _onError(message: string, params: FileSopParams) {
// 		this.states?.error.set(`could not load geometry from ${params.url} (${message})`);
// 	}

// 	private _ensureGeometryHasIndex(object: Object3D) {
// 		const mesh = object as Mesh;
// 		const geometry = mesh.geometry;
// 		if (geometry) {
// 			this.createIndexIfNone(geometry as BufferGeometry);
// 		}
// 	}
// }