<?php

declare(strict_types=1);

namespace App\BusProNet\XmlLoader;

use App\BusProNet\ApiClient;
use App\BusProNet\Model\Agency;
use App\BusProNet\Model\Notification;
use Psr\Cache\InvalidArgumentException;
use Psr\Log\LoggerInterface;
use Symfony\Contracts\Cache\CacheInterface;
use Symfony\Contracts\Cache\ItemInterface;

class AgencyLoader
{
    public const DEFAULT_AGENCY_CODE = 'INTERN';
    public const INTERNAL_AGENCY_CODE = '0004';

    public function __construct(
        private readonly CacheInterface $cache,
        private readonly ApiClient $apiClient,
        private readonly LoggerInterface $logger,
    ) {
    }

    /**
     * @return Agency[]
     */
    public function loadAll(): array
    {
        try {
            return $this->cache->get('bpn_agencies', function (ItemInterface $item) {
                // Cache for 24 hours (agencies change infrequently)
                $item->expiresAfter(24 * 60 * 60);

                $result = $this->apiClient->getAgencies();

                if ($result instanceof Notification) {
                    $this->logger->error('Failed to fetch agencies from BPN API', [
                        'message' => $result->message,
                    ]);

                    return [];
                }

                return $result;
            });
        } catch (InvalidArgumentException $e) {
            $this->logger->error('Cache error while loading agencies', [
                'exception' => $e->getMessage(),
            ]);

            return [];
        }
    }

    public function loadById(int $id): ?Agency
    {
        $agencies = $this->loadAll();

        foreach ($agencies as $agency) {
            if ($agency->id === $id) {
                return $agency;
            }
        }

        return null;
    }

    public function loadByCode(string $code): ?Agency
    {
        $agencies = $this->loadAll();

        foreach ($agencies as $agency) {
            if ($agency->code === $code) {
                return $agency;
            }
        }

        return null;
    }

    public function loadDefault(): ?Agency
    {
        return $this->loadByCode(self::DEFAULT_AGENCY_CODE);
    }
}