<?php

declare (strict_types=1);
namespace Rector\Php56\Rector\FuncCall;

use PhpParser\Node;
use PhpParser\Node\Expr\BinaryOp\Pow;
use PhpParser\Node\Expr\FuncCall;
use Rector\Core\Rector\AbstractRector;
use Rector\Core\ValueObject\PhpVersionFeature;
use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
/**
 * @see \Rector\Tests\Php56\Rector\FuncCall\PowToExpRector\PowToExpRectorTest
 */
final class PowToExpRector extends \Rector\Core\Rector\AbstractRector
{
    public function getRuleDefinition() : \Symplify\RuleDocGenerator\ValueObject\RuleDefinition
    {
        return new \Symplify\RuleDocGenerator\ValueObject\RuleDefinition('Changes pow(val, val2) to ** (exp) parameter', [new \Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample('pow(1, 2);', '1**2;')]);
    }
    /**
     * @return array<class-string<Node>>
     */
    public function getNodeTypes() : array
    {
        return [\PhpParser\Node\Expr\FuncCall::class];
    }
    /**
     * @param FuncCall $node
     */
    public function refactor(\PhpParser\Node $node) : ?\PhpParser\Node
    {
        if (!$this->isAtLeastPhpVersion(\Rector\Core\ValueObject\PhpVersionFeature::EXP_OPERATOR)) {
            return null;
        }
        if (!$this->isName($node, 'pow')) {
            return null;
        }
        if (\count($node->args) !== 2) {
            return null;
        }
        $firstArgument = $node->args[0]->value;
        $secondArgument = $node->args[1]->value;
        return new \PhpParser\Node\Expr\BinaryOp\Pow($firstArgument, $secondArgument);
    }
}
