/*
* @license Apache-2.0
*
* Copyright (c) 2026 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.
*/

/* eslint-disable space-in-parens */

import zeros = require( './../../../../zeros' );
import fillDiagonal = require( './index' );


// TESTS //

// The function returns an ndarray...
{
	const x = zeros( [ 2, 2 ] );

	fillDiagonal( x, 1.0, [ 0, 1 ], 0 ); // $ExpectType float64ndarray
}

// The compiler throws an error if the function is not provided a first argument which is an ndarray...
{
	fillDiagonal( '5', 1.0, [ 0, 1 ], 0 ); // $ExpectError
	fillDiagonal( 5, 1.0, [ 0, 1 ], 0 ); // $ExpectError
	fillDiagonal( true, 1.0, [ 0, 1 ], 0 ); // $ExpectError
	fillDiagonal( false, 1.0, [ 0, 1 ], 0 ); // $ExpectError
	fillDiagonal( null, 1.0, [ 0, 1 ], 0 ); // $ExpectError
	fillDiagonal( {}, 1.0, [ 0, 1 ], 0 ); // $ExpectError
	fillDiagonal( [ '5' ], 1.0, [ 0, 1 ], 0 ); // $ExpectError
	fillDiagonal( ( x: number ): number => x, 1.0, [ 0, 1 ], 0 ); // $ExpectError
}

// The compiler throws an error if the function is not provided a third argument which is an array-like object containing numbers...
{
	const x = zeros( [ 2, 2 ] );

	fillDiagonal( x, 1.0, '5', 0 ); // $ExpectError
	fillDiagonal( x, 1.0, 5, 0 ); // $ExpectError
	fillDiagonal( x, 1.0, true, 0 ); // $ExpectError
	fillDiagonal( x, 1.0, false, 0 ); // $ExpectError
	fillDiagonal( x, 1.0, null, 0 ); // $ExpectError
	fillDiagonal( x, 1.0, {}, 0 ); // $ExpectError
	fillDiagonal( x, 1.0, [ '5' ], 0 ); // $ExpectError
	fillDiagonal( x, 1.0, ( x: number ): number => x, 0 ); // $ExpectError
}

// The compiler throws an error if the function is not provided a fourth argument which is a number...
{
	const x = zeros( [ 2, 2 ] );

	fillDiagonal( x, 1.0, [ 0, 1 ], '5' ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ], true ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ], false ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ], null ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ], {} ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ], [] ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ], ( x: number ): number => x ); // $ExpectError
}

// The compiler throws an error if the function is provided an unsupported number of arguments...
{
	const x = zeros( [ 2, 2 ] );

	fillDiagonal(); // $ExpectError
	fillDiagonal( x ); // $ExpectError
	fillDiagonal( x, 1.0 ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ] ); // $ExpectError
	fillDiagonal( x, 1.0, [ 0, 1 ], 0, {} ); // $ExpectError
}