<?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:----OTY2NDYwNDA0MzMwNTc4OCAxMDUyMzU4OTA2ODgzMjk4IDk2OTUxNTEwNjkzOTkyMw==