<?php

declare(strict_types=1);

namespace App\Administration\Application\Query\GetSubjectGradeStats;

use App\Administration\Application\Port\SubjectGradeStats;
use App\Administration\Application\Port\SubjectGradeStatsReader;
use App\Administration\Domain\Model\Subject\SubjectId;
use App\Shared\Domain\Tenant\TenantId;
use Symfony\Component\Messenger\Attribute\AsMessageHandler;

#[AsMessageHandler(bus: 'query.bus')]
final readonly class GetSubjectGradeStatsHandler
{
    public function __construct(
        private SubjectGradeStatsReader $reader,
    ) {
    }

    public function __invoke(GetSubjectGradeStatsQuery $query): SubjectGradeStats
    {
        return $this->reader->countForSubject(
            TenantId::fromString($query->tenantId),
            SubjectId::fromString($query->subjectId),
        );
    }
}