<?php

declare(strict_types=1);

namespace App\Service;

use App\Entity\Groups\Accommodation;
use Symfony\Component\OptionsResolver\OptionsResolver;

/**
 * Resolves the terms and conditions a booking is concluded under.
 *
 * Which legal entity operates an accommodation depends on the country it is located in,
 * and each entity has its own AGB document. Countries without a dedicated entity — and
 * any country whose document is not configured in this environment — fall back to the
 * general E&P terms.
 */
class AccommodationTermsUrlProvider
{
    /** @var array<string, string> country code → terms document URL */
    private array $termsUrls;

    /**
     * @param array<string, string> $config
     */
    public function __construct(
        array $config,
        private readonly string $termsAndConditionsUrl,
    ) {
        $this->termsUrls = $this->resolveConfig($config);
    }

    public function forAccommodation(?Accommodation $accommodation): string
    {
        $country = $accommodation?->getCountry();
        $url = null !== $country ? ($this->termsUrls[$country->value] ?? '') : '';

        return '' !== $url ? $url : $this->termsAndConditionsUrl;
    }

    /**
     * @param array<string, string> $config
     *
     * @return array<string, string>
     */
    private function resolveConfig(array $config): array
    {
        $resolver = new OptionsResolver();
        $resolver->setRequired(['AT', 'CH', 'IT']);
        $resolver->setAllowedTypes('AT', 'string');
        $resolver->setAllowedTypes('CH', 'string');
        $resolver->setAllowedTypes('IT', 'string');

        return $resolver->resolve($config);
    }
}