<?php
/**
 * Copyright (C) 2011-2017 by Gilles Crettenand <gilles@crettenand.info>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
namespace Functional;

use Functional\Exceptions\MatchException;

use function Functional\head;
use function Functional\tail;
use function Functional\if_else;

/**
 * Performs an operation checking for the given conditions
 *
 * @param array $conditions the conditions to check against
 *
 * @return callable|null the function that calls the callable of the first truthy condition
 */
function match(array $conditions)
{
    MatchException::assert($conditions, __FUNCTION__);

    return function ($value) use ($conditions) {
        if (empty($conditions)) {
            return null;
        }

        list($if, $then) = head($conditions);

        return if_else($if, $then, match(tail($conditions)))($value);
    };
}