<?php

declare(strict_types=1);

namespace Roave\BetterReflection\Reflection\StringCast;

use Roave\BetterReflection\Reflection\ReflectionFunction;
use Roave\BetterReflection\Reflection\ReflectionParameter;

use function array_reduce;
use function assert;
use function count;
use function is_string;
use function sprintf;

/** @internal */
final class ReflectionFunctionStringCast
{
    /**
     * @return non-empty-string
     *
     * @psalm-pure
     */
    public static function toString(ReflectionFunction $functionReflection): string
    {
        $parametersFormat = $functionReflection->getNumberOfParameters() > 0 || $functionReflection->hasReturnType()
            ? "\n\n  - Parameters [%d] {%s\n  }"
            : '';

        $returnTypeFormat = $functionReflection->hasReturnType()
            ? "\n  - Return [ %s ]"
            : '';

        $string = sprintf(
            'Function [ <%s> function %s ] {%s' . $parametersFormat . $returnTypeFormat . "\n}",
            self::sourceToString($functionReflection),
            $functionReflection->getName(),
            self::fileAndLinesToString($functionReflection),
            count($functionReflection->getParameters()),
            self::parametersToString($functionReflection),
            self::returnTypeToString($functionReflection),
        );
        assert($string !== '');

        return $string;
    }

    /** @psalm-pure */
    private static function sourceToString(ReflectionFunction $functionReflection): string
    {
        if ($functionReflection->isUserDefined()) {
            return 'user';
        }

        $extensionName = $functionReflection->getExtensionName();
        assert(is_string($extensionName));

        return sprintf('internal:%s', $extensionName);
    }

    /** @psalm-pure */
    private static function fileAndLinesToString(ReflectionFunction $functionReflection): string
    {
        if ($functionReflection->isInternal()) {
            return '';
        }

        $fileName = $functionReflection->getFileName();
        if ($fileName === null) {
            return '';
        }

        return sprintf("\n  @@ %s %d - %d", $fileName, $functionReflection->getStartLine(), $functionReflection->getEndLine());
    }

    /** @psalm-pure */
    private static function parametersToString(ReflectionFunction $functionReflection): string
    {
        return array_reduce($functionReflection->getParameters(), static fn (string $string, ReflectionParameter $parameterReflection): string => $string . "\n    " . ReflectionParameterStringCast::toString($parameterReflection), '');
    }

    /** @psalm-pure */
    private static function returnTypeToString(ReflectionFunction $methodReflection): string
    {
        $type = $methodReflection->getReturnType();

        if ($type === null) {
            return '';
        }

        return ReflectionTypeStringCast::toString($type);
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----ODg0Nzk5MTYwNDc1OTYzMSAxMTI1NDM1MDY4NjY0MjA4IDQ3MzQ4NTYxNzQ3MTY3ODQ=