/*---------------------------------------------------------------------------------------------

* Copyright (c) Microsoft Corporation. All rights reserved.

* Licensed under the MIT License. See License.txt in the project root for license information.

*--------------------------------------------------------------------------------------------*/

'use strict';

// tslint:disable:no-any no-increment-decrement

import { isFunction, isString } from '../utils/sysTypes';

export type TypeConstraint = string | Function;

export function validateConstraints(args: any[], constraints: TypeConstraint[]): void {

const len = Math.min(args.length, constraints.length);

for (let i = 0; i < len; i++) {

validateConstraint(args[i], constraints[i]);

}

}

export function validateConstraint(arg: any, constraint: TypeConstraint): void {

if (isString(constraint)) {

if (typeof arg !== constraint) {

throw new Error(`argument does not match constraint: typeof ${constraint}`);

}

} else if (isFunction(constraint)) {

if (arg instanceof constraint) {

return;

}

if (arg && arg.constructor === constraint) {

return;

}

if (constraint.length === 1 && constraint.call(undefined, arg) === true) {

return;

}

throw new Error('argument does not match one of these constraints: arg instanceof constraint, arg.constructor === constraint, nor constraint(arg) === true');

}

}