<?php

namespace Icefox\DTO;

use Icefox\DTO\RuleFactory;
use phpDocumentor\Reflection\PseudoTypes\Generic;

class CustomHandlers
{
    /**
     * @return array<string,string[]>
     */
    public static function CollectionRules(ParameterMeta $parameter, RuleFactory $factory): array
    {
        if (is_null($parameter->tag)) {
            return [];
        }

        $type = $parameter->tag->getType();
        if (!$type instanceof Generic) {
            return [];
        }

        $subtypes = $type->getTypes();

        if (count($subtypes) == 0) {
            return ['' => ['array']];
        }

        $subtype = count($subtypes) == 1 ? $subtypes[0] : $subtypes[1];

        return $factory->mergeRules(
            ['' => ['array']],
            $factory->getRulesFromDocBlock($subtype, '.*'),
        );
    }
}