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

type Matrix3Tuple = [
	number, number, number,
	number, number, number,
	number, number, number,
];

/**
 * ( 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;

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

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

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

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

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

	/**
	 * Array with matrix values.
	 * @default [1, 0, 0, 0, 1, 0, 0, 0, 1]
	 */
	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(): Matrix3;
	copy( m: Matrix3 ): this;
	extractBasis( xAxis: Vector3, yAxis: Vector3, zAxis: Vector3 ): Matrix3;
	setFromMatrix4( m: Matrix4 ): Matrix3;
	multiplyScalar( s: number ): Matrix3;
	determinant(): number;

	/**
	 * Inverts this matrix in place.
	 */
	invert(): 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[] ): Matrix3;

	setUvTransform( tx: number, ty: number, sx: number, sy: number, rotation: number, cx: number, cy: number ): Matrix3;

	scale( sx: number, sy: number ): Matrix3;

	rotate( theta: number ): Matrix3;

	translate( tx: number, ty: number ): Matrix3;

	equals( matrix: Matrix3 ): boolean;

	/**
	 * Sets the values of this matrix from the provided array.
	 * @param array the source array.
	 * @param offset (optional) offset into the array. Default is 0.
	 */
	fromArray( array: number[], offset?: number ): Matrix3;

	/**
	 * Sets the values of this matrix from the provided array-like.
	 * @param array the source array-like.
	 * @param offset (optional) offset into the array-like. Default is 0.
	 */
	fromArray( array: ArrayLike<number>, offset?: number ): Matrix3;

	/**
	 * Returns an array with the values of this matrix, or copies them into the provided array.
	 * @param array (optional) array to store the matrix to. If this is not provided, a new array will be created.
	 * @param offset (optional) optional offset into the array.
	 * @return The created or provided array.
	 */
	toArray( array?: number[], offset?: number ): number[];
	toArray( array?: Matrix3Tuple, offset?: 0 ): Matrix3Tuple;

	/**
	 * Copies he values of this matrix into the provided array-like.
	 * @param array array-like to store the matrix to.
	 * @param offset (optional) optional offset into the array-like.
	 * @return The provided array-like.
	 */
	toArray( array?: ArrayLike<number>, offset?: number ): ArrayLike<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[];

	/**
	 * @deprecated Use {@link Matrix3#invert .invert()} instead.
	 */
	getInverse( matrix: Matrix ): Matrix;

}