<?php

declare(strict_types=1);

namespace App\Validator\Constraints;

use App\Form\Model\ParticipantEditDto;
use App\Service\VoucherValidationService;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;

class PurchaseVoucherValidator extends ConstraintValidator
{
    public function __construct(
        private readonly VoucherValidationService $voucherValidationService,
    ) {
    }

    public function validate(mixed $value, Constraint $constraint): void
    {
        if (!$constraint instanceof PurchaseVoucher) {
            throw new UnexpectedTypeException($constraint, PurchaseVoucher::class);
        }

        if (!$value instanceof ParticipantEditDto) {
            throw new UnexpectedTypeException($value, ParticipantEditDto::class);
        }

        $voucherCode = $value->participant->purchaseVoucherCode;

        // Skip validation if voucher code is empty
        if (null === $voucherCode || '' === trim($voucherCode)) {
            return;
        }

        // Validate voucher via API
        $result = $this->voucherValidationService->validatePurchaseVoucher($voucherCode);

        // Add violation if voucher is invalid
        if (false === $result->isValid) {
            $this->context->buildViolation($constraint->message)
                ->setParameter('{{ error }}', $result->errorMessage ?? 'Unbekannter Fehler')
                ->atPath('participant.purchaseVoucherCode')
                ->addViolation();
        }
    }
}