<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace RectorPrefix20210808\Symfony\Component\DependencyInjection\LazyProxy;

/**
 * @author Nicolas Grekas <p@tchwork.com>
 *
 * @internal
 */
class ProxyHelper
{
    /**
     * @return string|null The FQCN or builtin name of the type hint, or null when the type hint references an invalid self|parent context
     * @param \ReflectionFunctionAbstract $r
     * @param \ReflectionParameter|null $p
     * @param bool $noBuiltin
     */
    public static function getTypeHint($r, $p = null, $noBuiltin = \false) : ?string
    {
        if ($p instanceof \ReflectionParameter) {
            $type = $p->getType();
        } else {
            $type = $r->getReturnType();
        }
        if (!$type) {
            return null;
        }
        $types = [];
        $glue = '|';
        if ($type instanceof \ReflectionUnionType) {
            $reflectionTypes = $type->getTypes();
        } elseif ($type instanceof \RectorPrefix20210808\ReflectionIntersectionType) {
            $reflectionTypes = $type->getTypes();
            $glue = '&';
        } elseif ($type instanceof \ReflectionNamedType) {
            $reflectionTypes = [$type];
        } else {
            return null;
        }
        foreach ($reflectionTypes as $type) {
            if ($type->isBuiltin()) {
                if (!$noBuiltin) {
                    $types[] = $type->getName();
                }
                continue;
            }
            $lcName = \strtolower($type->getName());
            $prefix = $noBuiltin ? '' : '\\';
            if ('self' !== $lcName && 'parent' !== $lcName) {
                $types[] = $prefix . $type->getName();
                continue;
            }
            if (!$r instanceof \ReflectionMethod) {
                continue;
            }
            if ('self' === $lcName) {
                $types[] = $prefix . $r->getDeclaringClass()->name;
            } else {
                $types[] = ($parent = $r->getDeclaringClass()->getParentClass()) ? $prefix . $parent->name : null;
            }
        }
        return $types ? \implode($glue, $types) : null;
    }
}
