<?php
/**
* @author Amasty Team
* @copyright Copyright (c) 2022 Amasty (https://www.amasty.com)
* @package Magento 2 Base Package
*/

namespace Amasty\Base\Model;

use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\App\DeploymentConfig;
use Magento\Framework\Shell;
use Symfony\Component\Process\PhpExecutableFinder;

class CliPhpResolver
{
private const ENV_PHP_EXECUTABLE_PATH = 'php_executable_path';
private const CONFIG_PHP_EXECUTABLE_PATH = 'amasty_base/system/cli_php_path';

private const VERSION_CHECK_REGEXP = '/PHP [\d\.]+ \(cli\)/';

/**
* @var DeploymentConfig
*/
private $deploymentConfig;

/**
* @var PhpExecutableFinder
*/
private $executableFinder;

/**
* @var Shell
*/
private $shell;

/**
* @var ScopeConfigInterface
*/
private $configProvider;

/**
* @var string
*/
private $executablePath;

public function __construct(
DeploymentConfig $deploymentConfig,
ScopeConfigInterface $configProvider,
PhpExecutableFinder $executableFinder,
Shell $shell
) {
$this->deploymentConfig = $deploymentConfig;
$this->executableFinder = $executableFinder;
$this->shell = $shell;
$this->configProvider = $configProvider;
}

/**
* Return Cli PHP executable path.
* Assumed that this executable will be executed through `exec` function
*
* @return string
*/
public function getExecutablePath(): string
{
if (!$this->executablePath) {
$this->executablePath = $this->resolvePhpExecutable();
}

return $this->executablePath;
}

private function resolvePhpExecutable()
{
$pathCandidates = [
$this->configProvider->getValue(self::CONFIG_PHP_EXECUTABLE_PATH),
$this->deploymentConfig->get(self::ENV_PHP_EXECUTABLE_PATH),
$this->executableFinder->find()
];

foreach ($pathCandidates as $path) {
if ($path && $this->isExecutable($path)) {
return $path;
}
}

return 'php';
}

private function isExecutable($path): bool
{
$disabledFunctions = $this->getDisabledPhpFunctions();
if (in_array('exec', $disabledFunctions)) {
throw new \RuntimeException(
(string)__(
'The PHP function exec is disabled.'
. ' Please contact your system administrator or your hosting provider.'
)
);
}

try {
$versionResult = (string)$this->shell->execute($path . ' %s', ['--version']);
} catch (\Exception $e) {
return false;
}

return (bool)preg_match(self::VERSION_CHECK_REGEXP, $versionResult);
}

private function getDisabledPhpFunctions(): array
{
return explode(',', str_replace(' ', ',', ini_get('disable_functions')));
}
}