import { TextureBase } from '@awayjs/renderer';

import { DiffuseBasicMethod } from './DiffuseBasicMethod';
import { CompositeMethodBase } from './CompositeMethodBase';

/**
 * DiffuseCompositeMethod provides a base class for diffuse methods that wrap a diffuse method to alter the
 * calculated diffuse reflection strength.
 */
export class DiffuseCompositeMethod extends CompositeMethodBase {
	/**
	 * Creates a new <code>DiffuseCompositeMethod</code> object.
	 *
	 * @param modulateMethod The method which will add the code to alter the base method's strength. It needs to have the signature clampDiffuse(t:ShaderRegisterElement, regCache:ShaderRegisterCache):string, in which t.w will contain the diffuse strength.
	 * @param baseMethod The base diffuse method on which this method's shading is based.
	 */
	constructor(baseMethod: DiffuseBasicMethod | DiffuseCompositeMethod = null) {
		super(baseMethod);
	}

	public createBaseMethod(): DiffuseBasicMethod | DiffuseCompositeMethod {
		return new DiffuseBasicMethod();
	}

	/**
	 * @inheritDoc
	 */
	public get texture(): TextureBase {
		return (<DiffuseBasicMethod> this._baseMethod).texture;
	}

	public set texture(value: TextureBase) {
		(<DiffuseBasicMethod> this._baseMethod).texture = value;
	}

	/**
	 * @inheritDoc
	 */
	public get color(): number {
		return (<DiffuseBasicMethod> this._baseMethod).color;
	}

	public set color(value: number) {
		(<DiffuseBasicMethod> this._baseMethod).color = value;
	}

	/**
	 * @inheritDoc
	 */
	public get multiply(): boolean {
		return (<DiffuseBasicMethod> this._baseMethod).multiply;
	}

	public set multiply(value: boolean) {
		(<DiffuseBasicMethod> this._baseMethod).multiply = value;
	}
}