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<?php

/*
 * This file is part of the Fidry CPUCounter Config package.
 *
 * (c) Théo FIDRY <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Fidry\CpuCoreCounter\Finder;

use function preg_match;

/**
 * Find the number of logical CPU cores for Windows leveraging the Get-CimInstance
 * cmdlet, which is a newer version that is recommended over Get-WmiObject.
 */
final class CmiCmdletLogicalFinder extends ProcOpenBasedFinder
{
    private const CPU_CORE_COUNT_REGEX = '/NumberOfLogicalProcessors[\s\n]-+[\s\n]+(?<count>\d+)/';

    protected function getCommand(): string
    {
        return 'Get-CimInstance -ClassName Win32_ComputerSystem | Select-Object -Property NumberOfLogicalProcessors';
    }

    public function toString(): string
    {
        return 'CmiCmdletLogicalFinder';
    }

    protected function countCpuCores(string $process): ?int
    {
        if (0 === preg_match(self::CPU_CORE_COUNT_REGEX, $process, $matches)) {
            return parent::countCpuCores($process);
        }

        $count = $matches['count'];

        return parent::countCpuCores($count);
    }
}