import {Object3D, Material, Vector2, Vector4, Camera, Color} from 'three';
import {NamedFunction2, ObjectNamedFunction5} from './_Base';
import {RenderPixelController, coreCursorToUv} from '../../core/render/renderPixel/RenderPixelController';

export class cursorToUv extends NamedFunction2<[Vector2, Vector2]> {
	static override type() {
		return 'cursorToUv';
	}
	func(cursor: Vector2, target: Vector2): Vector2 {
		coreCursorToUv(cursor, target);

		return target;
	}
}
// interface Object3DRestoreContext {
// 	parent: Object3D | null;
// 	// background: Color | Texture | null;
// }
// interface SceneRestoreContext {
// 	overrideMaterial: Material | null;
// 	// background: Color | Texture | null;
// }
// interface RendererRestoreContext {
// 	toneMapping: ToneMapping;
// 	outputColorSpace: ColorSpace;
// }
// interface RestoreContext {
// 	object: Object3DRestoreContext;
// 	// scene: SceneRestoreContext;
// 	renderer: RendererRestoreContext;
// }

export class renderPixel extends ObjectNamedFunction5<[Material, Camera, Color, Vector2, Vector4]> {
	// Note for this to work on iOS:
	// The materials used for picking should have their transparency OFF.
	// This could potentially be done automatically by traversing the scene first.
	// private _renderTarget: WebGLRenderTarget = new WebGLRenderTarget(1, 1, {
	// 	minFilter: LinearFilter,
	// 	magFilter: NearestFilter,
	// 	format: RGBAFormat,
	// 	type: FloatType,
	// });
	// private _renderScene = new Scene();
	// private _restoreContext: RestoreContext = {
	// 	object: {
	// 		parent: null,
	// 	},
	// 	// scene: {
	// 	// 	overrideMaterial: null,
	// 	// },
	// 	renderer: {
	// 		toneMapping: NoToneMapping,
	// 		outputColorSpace: NoColorSpace,
	// 	},
	// };
	// private _read = new Float32Array(4);
	// private _getDefaultCamera: getDefaultCamera | undefined;
	static override type() {
		return 'renderPixel';
	}
	private _renderPixelController: RenderPixelController = new RenderPixelController();
	func(
		object3D: Object3D,
		material: Material | null,
		camera: Camera,
		backgroundColor: Color,
		uv: Vector2,
		target: Vector4
	): Vector4 {
		this._renderPixelController.renderColor(this.scene, object3D, material, camera, backgroundColor, uv, target);
		// const renderer = this.scene.renderersRegister.lastRegisteredRenderer();
		// if (!renderer) {
		// 	return target;
		// }
		// if (!(renderer instanceof WebGLRenderer)) {
		// 	console.log('renderPixel: renderer found is not WebGLRenderer');
		// 	return target;
		// }
		// if (camera == null) {
		// 	this._getDefaultCamera =
		// 		this._getDefaultCamera || new getDefaultCamera(this.node, this.shadersCollectionController);
		// 	camera = this._getDefaultCamera.func();
		// }

		// this._prepare(object3D, material, backgroundColor, renderer);
		// this._render(uv, camera, renderer, target);
		// this._restore(object3D, renderer);

		return target;
	}

	// private _prepare(object3D: Object3D, material: Material | null, backgroundColor: Color, renderer: WebGLRenderer) {
	// 	// save context
	// 	this._restoreContext.renderer.outputColorSpace = renderer.outputColorSpace;
	// 	this._restoreContext.renderer.toneMapping = renderer.toneMapping;
	// 	this._restoreContext.object.parent = object3D.parent;

	// 	// set context
	// 	this._renderScene.background = backgroundColor;
	// 	this._renderScene.overrideMaterial = material || null;
	// 	this._renderScene.attach(object3D);
	// 	renderer.toneMapping = NoToneMapping;
	// 	renderer.outputColorSpace = NoColorSpace;
	// }
	// private _render(uv: Vector2, camera: Camera, renderer: WebGLRenderer, target: Vector4) {
	// 	(camera as any).setViewOffset(
	// 		renderer.domElement.width,
	// 		renderer.domElement.height,
	// 		uv.x * renderer.domElement.width,
	// 		uv.y * renderer.domElement.height,
	// 		1,
	// 		1
	// 	);

	// 	renderer.setRenderTarget(this._renderTarget);
	// 	renderer.clear();
	// 	renderer.render(this._renderScene, camera);
	// 	renderer.setRenderTarget(null);
	// 	(camera as any).clearViewOffset();

	// 	// There are some cases where .readRenderTargetPixels is slow,
	// 	// and this seems to be due to the calls to _gl.getParameters.
	// 	// Here we are bypassing it.
	// 	// Note: this attempt to bypass needs "properties", which is internal to WebGLRenderer.
	// 	// const context = renderer.getContext();
	// 	// const textureFormat = context.RGBA; // RGBAFormat see three/WebGLUtils.js
	// 	// const textureType = context.FLOAT; // FloatType see three/WebGLUtils.js
	// 	// context.readPixels(0, 0, 1, 1, textureFormat, textureType, this._read);
	// 	renderer.readRenderTargetPixels(this._renderTarget, 0, 0, 1, 1, this._read);

	// 	// read buffer into target vector
	// 	target.fromArray(this._read);
	// }
	// private _restore(object3D: Object3D, renderer: WebGLRenderer) {
	// 	renderer.outputColorSpace = this._restoreContext.renderer.outputColorSpace;
	// 	renderer.toneMapping = this._restoreContext.renderer.toneMapping;
	// 	this._restoreContext.object.parent?.attach(object3D);
	// }
}