<?php

namespace App\BusProNet\DataProvider;

use App\BusProNet\Model\Country;
use App\MyEp\Api\ApiClient;
use App\MyEp\Api\ResponseMapper;
use App\MyEp\Cache\StaleWhileErrorCache;

/**
 * Country base data, read from MyE&P rather than from BusProNet directly.
 *
 * Keyed by the raw BusProNet token, not by an ISO code: the token is what a hotel's
 * country and a teamer's nationality join against, and that vocabulary stays raw.
 */
class CountryDataProvider
{
    private const CACHE_KEY = 'myep_countries';
    private const TTL = 3600;

    public function __construct(
        private readonly ApiClient $apiClient,
        private readonly ResponseMapper $responseMapper,
        private readonly StaleWhileErrorCache $cache,
    ) {
    }

    /**
     * @return array<string, Country> keyed by token
     */
    public function getAll(): array
    {
        return $this->cache->get(
            self::CACHE_KEY,
            self::TTL,
            fn (): array => $this->responseMapper->mapCountries($this->apiClient->get('api/countries')),
        );
    }

    public function get(?string $token): ?Country
    {
        if (null === $token) {
            return null;
        }

        return $this->getAll()[$token] ?? null;
    }
}