<?php

namespace Composer\Pcre\PHPStan;

use PHPStan\Analyser\Scope;
use PHPStan\Type\ArrayType;
use PHPStan\Type\Constant\ConstantArrayType;
use PHPStan\Type\Constant\ConstantIntegerType;
use PHPStan\Type\IntersectionType;
use PHPStan\Type\Php\RegexArrayShapeMatcher;
use PHPStan\Type\Type;
use PHPStan\Type\TypeCombinator;
use PHPStan\Type\TypeTraverser;
use PHPStan\Type\UnionType;
use PhpParser\Node\Arg;

final class PregMatchFlags
{
    public static function getType(?Arg $flagsArg, Scope $scope): ?Type
    {
        if ($flagsArg === null) {
            return new ConstantIntegerType(PREG_UNMATCHED_AS_NULL);
        }

        $flagsType = $scope->getType($flagsArg->value);

        $constantScalars = $flagsType->getConstantScalarValues();
        if ($constantScalars === []) {
            return null;
        }

        $internalFlagsTypes = [];
        foreach ($flagsType->getConstantScalarValues() as $constantScalarValue) {
            if (!is_int($constantScalarValue)) {
                return null;
            }

            $internalFlagsTypes[] = new ConstantIntegerType($constantScalarValue | PREG_UNMATCHED_AS_NULL);
        }
        return TypeCombinator::union(...$internalFlagsTypes);
    }

    public static function removeNullFromMatches(Type $matchesType): Type
    {
        return TypeTraverser::map($matchesType, static function (Type $type, callable $traverse): Type {
            if ($type instanceof UnionType || $type instanceof IntersectionType) {
                return $traverse($type);
            }

            if ($type instanceof ConstantArrayType) {
                return new ConstantArrayType(
                    $type->getKeyTypes(),
                    array_map(static function (Type $valueType) use ($traverse): Type {
                        return $traverse($valueType);
                    }, $type->getValueTypes()),
                    $type->getNextAutoIndexes(),
                    [],
                    $type->isList()
                );
            }

            if ($type instanceof ArrayType) {
                return new ArrayType($type->getKeyType(), $traverse($type->getItemType()));
            }

            return TypeCombinator::removeNull($type);
        });
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTMwMDA1ODg1MDgyOTM2NiA0NTYwOTE2ODc2NjE5NzA1IDgxNzQ1MTU1NDUyNzg5MTU=