<?php

declare (strict_types=1);
/*
 * This file is part of PHP CS Fixer.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *     Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */
namespace PhpCsFixer\Fixer\LanguageConstruct;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\Fixer\ExperimentalFixerInterface;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\FixerDefinition\FixerDefinitionInterface;
use PhpCsFixer\Tokenizer\Tokens;
/**
 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 */
final class ClassKeywordFixer extends AbstractFixer implements ExperimentalFixerInterface
{
    public function getDefinition() : FixerDefinitionInterface
    {
        return new FixerDefinition('Converts FQCN strings to `*::class` keywords.', [new CodeSample('<?php

$foo = \'PhpCsFixer\\Tokenizer\\Tokens\';
$bar = "\\PhpCsFixer\\Tokenizer\\Tokens";
')], 'This rule does not have an understanding of whether a class exists in the scope of the codebase or not, relying on run-time and autoloaded classes to determine it, which makes the rule useless when running on a single file out of codebase context.', 'Do not use it, unless you know what you are doing.');
    }
    /**
     * {@inheritdoc}
     *
     * Must run before FullyQualifiedStrictTypesFixer.
     */
    public function getPriority() : int
    {
        return 8;
    }
    public function isCandidate(Tokens $tokens) : bool
    {
        return \true;
    }
    public function isRisky() : bool
    {
        return \true;
    }
    protected function applyFix(\SplFileInfo $file, Tokens $tokens) : void
    {
        for ($index = $tokens->count() - 1; $index >= 0; --$index) {
            $token = $tokens[$index];
            if ($token->isGivenKind(\T_CONSTANT_ENCAPSED_STRING)) {
                $name = \substr($token->getContent(), 1, -1);
                $name = \ltrim($name, '\\');
                $name = \str_replace('\\\\', '\\', $name);
                if ($this->exists($name)) {
                    $substitution = Tokens::fromCode("<?php echo \\{$name}::class;");
                    $substitution->clearRange(0, 2);
                    $substitution->clearAt($substitution->getSize() - 1);
                    $substitution->clearEmptyTokens();
                    $tokens->clearAt($index);
                    $tokens->insertAt($index, $substitution);
                }
            }
        }
    }
    private function exists(string $name) : bool
    {
        if (\class_exists($name) || \interface_exists($name) || \trait_exists($name)) {
            $rc = new \ReflectionClass($name);
            return $rc->getName() === $name;
        }
        return \false;
    }
}
