<?php

declare (strict_types=1);
namespace Rector\NodeTypeResolver\NodeTypeResolver;

use PhpParser\Node;
use PhpParser\Node\Name;
use PhpParser\Node\Name\FullyQualified;
use PHPStan\Reflection\ReflectionProvider;
use PHPStan\Type\MixedType;
use PHPStan\Type\ObjectType;
use PHPStan\Type\Type;
use PHPStan\Type\UnionType;
use Rector\NodeTypeResolver\Contract\NodeTypeResolverInterface;
use Rector\NodeTypeResolver\Node\AttributeKey;
/**
 * @see \Rector\Tests\NodeTypeResolver\PerNodeTypeResolver\NameTypeResolver\NameTypeResolverTest
 */
final class NameTypeResolver implements \Rector\NodeTypeResolver\Contract\NodeTypeResolverInterface
{
    /**
     * @var \PHPStan\Reflection\ReflectionProvider
     */
    private $reflectionProvider;
    public function __construct(\PHPStan\Reflection\ReflectionProvider $reflectionProvider)
    {
        $this->reflectionProvider = $reflectionProvider;
    }
    /**
     * @return array<class-string<Node>>
     */
    public function getNodeClasses() : array
    {
        return [\PhpParser\Node\Name::class, \PhpParser\Node\Name\FullyQualified::class];
    }
    /**
     * @param Name $node
     */
    public function resolve(\PhpParser\Node $node) : \PHPStan\Type\Type
    {
        if ($node->toString() === 'parent') {
            return $this->resolveParent($node);
        }
        $fullyQualifiedName = $this->resolveFullyQualifiedName($node);
        return new \PHPStan\Type\ObjectType($fullyQualifiedName);
    }
    /**
     * @return \PHPStan\Type\MixedType|\PHPStan\Type\ObjectType|\PHPStan\Type\UnionType
     */
    private function resolveParent(\PhpParser\Node\Name $name)
    {
        $className = $name->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::CLASS_NAME);
        if ($className === null) {
            return new \PHPStan\Type\MixedType();
        }
        if (!$this->reflectionProvider->hasClass($className)) {
            return new \PHPStan\Type\MixedType();
        }
        $classReflection = $this->reflectionProvider->getClass($className);
        $parentClassObjectTypes = [];
        foreach ($classReflection->getParents() as $parentClassReflection) {
            $parentClassObjectTypes[] = new \PHPStan\Type\ObjectType($parentClassReflection->getName());
        }
        if ($parentClassObjectTypes === []) {
            return new \PHPStan\Type\MixedType();
        }
        if (\count($parentClassObjectTypes) === 1) {
            return $parentClassObjectTypes[0];
        }
        return new \PHPStan\Type\UnionType($parentClassObjectTypes);
    }
    private function resolveFullyQualifiedName(\PhpParser\Node\Name $name) : string
    {
        $nameValue = $name->toString();
        if (\in_array($nameValue, ['self', 'static', 'this'], \true)) {
            /** @var string|null $class */
            $class = $name->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::CLASS_NAME);
            if ($class === null) {
                // anonymous class probably
                return 'Anonymous';
            }
            return $class;
        }
        /** @var Name|null $resolvedNameNode */
        $resolvedNameNode = $name->getAttribute(\Rector\NodeTypeResolver\Node\AttributeKey::RESOLVED_NAME);
        if ($resolvedNameNode instanceof \PhpParser\Node\Name) {
            return $resolvedNameNode->toString();
        }
        return $nameValue;
    }
}
