import { Vector2 } from '../math/Vector2.js';
import { MeshStandardMaterial } from './MeshStandardMaterial.js';
import { Color } from '../math/Color.js';
import * as MathUtils from '../math/MathUtils.js';

/**
 * parameters = {
 *  clearcoat: <float>,
 *  clearcoatMap: new THREE.Texture( <Image> ),
 *  clearcoatRoughness: <float>,
 *  clearcoatRoughnessMap: new THREE.Texture( <Image> ),
 *  clearcoatNormalScale: <Vector2>,
 *  clearcoatNormalMap: new THREE.Texture( <Image> ),
 *
 *  ior: <float>,
 *  reflectivity: <float>,
 *
 *  sheen: <float>,
 *  sheenColor: <Color>,
 *  sheenColorMap: new THREE.Texture( <Image> ),
 *  sheenRoughness: <float>,
 *  sheenRoughnessMap: new THREE.Texture( <Image> ),
 *
 *  transmission: <float>,
 *  transmissionMap: new THREE.Texture( <Image> ),
 *
 *  thickness: <float>,
 *  thicknessMap: new THREE.Texture( <Image> ),
 *  attenuationDistance: <float>,
 *  attenuationColor: <Color>,
 *
 *  specularIntensity: <float>,
 *  specularIntensityMap: new THREE.Texture( <Image> ),
 *  specularColor: <Color>,
 *  specularColorMap: new THREE.Texture( <Image> )
 * }
 */

class MeshPhysicalMaterial extends MeshStandardMaterial {
	constructor(parameters) {
		super();

		this.defines = {
			STANDARD: '',
			PHYSICAL: '',
		};

		this.type = 'MeshPhysicalMaterial';

		this.clearcoatMap = null;
		this.clearcoatRoughness = 0.0;
		this.clearcoatRoughnessMap = null;
		this.clearcoatNormalScale = new Vector2(1, 1);
		this.clearcoatNormalMap = null;

		this.ior = 1.5;

		Object.defineProperty(this, 'reflectivity', {
			get: function () {
				return MathUtils.clamp((2.5 * (this.ior - 1)) / (this.ior + 1), 0, 1);
			},
			set: function (reflectivity) {
				this.ior = (1 + 0.4 * reflectivity) / (1 - 0.4 * reflectivity);
			},
		});

		this.sheenColor = new Color(0x000000);
		this.sheenColorMap = null;
		this.sheenRoughness = 1.0;
		this.sheenRoughnessMap = null;

		this.transmissionMap = null;

		this.thickness = 0;
		this.thicknessMap = null;
		this.attenuationDistance = 0.0;
		this.attenuationColor = new Color(1, 1, 1);

		this.specularIntensity = 1.0;
		this.specularIntensityMap = null;
		this.specularColor = new Color(1, 1, 1);
		this.specularColorMap = null;

		this._sheen = 0.0;
		this._clearcoat = 0;
		this._transmission = 0;

		this.setValues(parameters);
	}

	get sheen() {
		return this._sheen;
	}

	set sheen(value) {
		if (this._sheen > 0 !== value > 0) {
			this.version++;
		}

		this._sheen = value;
	}

	get clearcoat() {
		return this._clearcoat;
	}

	set clearcoat(value) {
		if (this._clearcoat > 0 !== value > 0) {
			this.version++;
		}

		this._clearcoat = value;
	}

	get transmission() {
		return this._transmission;
	}

	set transmission(value) {
		if (this._transmission > 0 !== value > 0) {
			this.version++;
		}

		this._transmission = value;
	}

	copy(source) {
		super.copy(source);

		this.defines = {
			STANDARD: '',
			PHYSICAL: '',
		};

		this.clearcoat = source.clearcoat;
		this.clearcoatMap = source.clearcoatMap;
		this.clearcoatRoughness = source.clearcoatRoughness;
		this.clearcoatRoughnessMap = source.clearcoatRoughnessMap;
		this.clearcoatNormalMap = source.clearcoatNormalMap;
		this.clearcoatNormalScale.copy(source.clearcoatNormalScale);

		this.ior = source.ior;

		this.sheen = source.sheen;
		this.sheenColor.copy(source.sheenColor);
		this.sheenColorMap = source.sheenColorMap;
		this.sheenRoughness = source.sheenRoughness;
		this.sheenRoughnessMap = source.sheenRoughnessMap;

		this.transmission = source.transmission;
		this.transmissionMap = source.transmissionMap;

		this.thickness = source.thickness;
		this.thicknessMap = source.thicknessMap;
		this.attenuationDistance = source.attenuationDistance;
		this.attenuationColor.copy(source.attenuationColor);

		this.specularIntensity = source.specularIntensity;
		this.specularIntensityMap = source.specularIntensityMap;
		this.specularColor.copy(source.specularColor);
		this.specularColorMap = source.specularColorMap;

		return this;
	}
}

MeshPhysicalMaterial.prototype.isMeshPhysicalMaterial = true;

export { MeshPhysicalMaterial };