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

export 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(): this;
	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 or array-like.
	 * @param array the source array or array-like.
	 * @param offset (optional) offset into the array-like. Default is 0.
	 */
	fromArray(array: number[] | 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;

	/**
	 * @deprecated Use {@link Matrix3#invert .invert()} instead.
	 */
	getInverse(matrix: Matrix4, throwOnDegenerate?: boolean): Matrix3;
	getInverse(matrix: Matrix): Matrix;

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