import { Matrix4 } from './Matrix4';
import { BufferAttribute } from './../core/BufferAttribute';
import { Vector3 } from './Vector3';

/**
 * ( interface Matrix<T> )
 */
export interface Matrix {
	/**
	 * Array with matrix values.
	 */
	elements: number[];

	/**
	 * identity():T;
	 */
	identity(): Matrix;

	/**
	 * copy(m:T):T;
	 */
	copy( m: this ): this;

	/**
	 * multiplyScalar(s:number):T;
	 */
	multiplyScalar( s: number ): Matrix;

	determinant(): number;

	/**
	 * getInverse(matrix:T, throwOnInvertible?:boolean):T;
	 */
	getInverse( matrix: Matrix, throwOnInvertible?: boolean ): Matrix;

	/**
	 * transpose():T;
	 */
	transpose(): Matrix;

	/**
	 * clone():T;
	 */
	clone(): this;
}

/**
 * ( class Matrix3 implements Matrix<Matrix3> )
 */
export class Matrix3 implements Matrix {

	/**
	 * Creates an identity matrix.
	 */
	constructor();

	/**
	 * Array with matrix values.
	 */
	elements: number[];

	set(
		n11: number,
		n12: number,
		n13: number,
		n21: number,
		n22: number,
		n23: number,
		n31: number,
		n32: number,
		n33: number
	): Matrix3;
	identity(): Matrix3;
	clone(): this;
	copy( m: Matrix3 ): this;
	setFromMatrix4( m: Matrix4 ): Matrix3;

	/**
	 * @deprecated Use {@link Matrix3#applyToBufferAttribute matrix3.applyToBufferAttribute( attribute )} instead.
	 */
	applyToBuffer(
		buffer: BufferAttribute,
		offset?: number,
		length?: number
	): BufferAttribute;

	applyToBufferAttribute( attribute: BufferAttribute ): BufferAttribute;

	multiplyScalar( s: number ): Matrix3;
	determinant(): number;
	getInverse( matrix: Matrix3, throwOnDegenerate?: boolean ): Matrix3;

	/**
	 * Transposes this matrix in place.
	 */
	transpose(): Matrix3;
	getNormalMatrix( matrix4: Matrix4 ): Matrix3;

	/**
	 * Transposes this matrix into the supplied array r, and returns itself.
	 */
	transposeIntoArray( r: number[] ): number[];
	fromArray( array: number[], offset?: number ): Matrix3;
	toArray(): number[];

	/**
	 * Multiplies this matrix by m.
	 */
	multiply( m: Matrix3 ): Matrix3;

	premultiply( m: Matrix3 ): Matrix3;

	/**
	 * Sets this matrix to a x b.
	 */
	multiplyMatrices( a: Matrix3, b: Matrix3 ): Matrix3;

	/**
	 * @deprecated Use {@link Vector3.applyMatrix3 vector.applyMatrix3( matrix )} instead.
	 */
	multiplyVector3( vector: Vector3 ): any;

	/**
	 * @deprecated This method has been removed completely.
	 */
	multiplyVector3Array( a: any ): any;
	getInverse( matrix: Matrix4, throwOnDegenerate?: boolean ): Matrix3;

	/**
	 * @deprecated Use {@link Matrix3#toArray .toArray()} instead.
	 */
	flattenToArrayOffset( array: number[], offset: number ): number[];

}