/*
* @license Apache-2.0
*
* Copyright (c) 2023 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*    http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

// TypeScript Version: 4.1

/// <reference types="@stdlib/types"/>

import { Array1D, Array2D, Array3D } from '@stdlib/types/array';
import { Shape1D, Shape2D, Shape3D } from '@stdlib/types/ndarray';

/**
* Unary callback.
*
* @param value - array element
* @returns result
*/
type Unary<T, U> = ( value: T ) => U;

/**
* Input array.
*/
type InputArray<T> = Array1D<T> | Array2D<T> | Array3D<T>;

/**
* Input array shape.
*/
type InputArrayShape = Shape1D | Shape2D | Shape3D;

/**
* Output array.
*/
type OutputArray<T> = Array3D<T>;

/**
* Output array shape.
*/
type OutputArrayShape = Shape3D;

/**
* Input and output arrays.
*/
type InOutArrays<T, U> = [
	InputArray<T>,
	OutputArray<U>
];

/**
* Input and output array shapes.
*/
type InOutShapes = [
	InputArrayShape,
	OutputArrayShape
];

/**
* Applies a unary callback to elements in a broadcasted nested input array and assigns results to elements in a three-dimensional nested output array.
*
* ## Notes
*
* -   The input array shape must be broadcast compatible with the output array shape.
*
* @param arrays - array containing one input nested array and one output nested array
* @param shapes - array shapes
* @param fcn - unary callback
*
* @example
* var ones3d = require( '@stdlib/array/base/ones3d' );
* var zeros3d = require( '@stdlib/array/base/zeros3d' );
*
* function scale( x ) {
*     return x * 10.0;
* }
*
* var shapes = [
*     [ 1, 1, 2 ],
*     [ 1, 2, 2 ]
* ];
*
* var x = ones3d( shapes[ 0 ] );
* var y = zeros3d( shapes[ 1 ] );
*
* bunary3d( [ x, y ], shapes, scale );
*
* console.log( y );
* // => [ [ [ 10.0, 10.0 ], [ 10.0, 10.0 ] ] ]
*/
declare function bunary3d<T = unknown, U = unknown>( arrays: InOutArrays<T, U>, shapes: InOutShapes, fcn: Unary<T, U> ): void;


// EXPORTS //

export = bunary3d;