<?php
declare(strict_types=1);

namespace App\Modules\Shipments;

use App\Core\Http\SslCertificateResolver;
use App\Modules\Settings\InpostIntegrationRepository;
use Throwable;

final class InpostTrackingService implements ShipmentTrackingInterface
{
    private const API_BASE_PRODUCTION = 'https://api-shipx-pl.easypack24.net/v1';
    private const API_BASE_SANDBOX = 'https://sandbox-api-shipx-pl.easypack24.net/v1';

    public function __construct(
        private readonly InpostIntegrationRepository $inpostRepository
    ) {
    }

    public function supports(string $provider): bool
    {
        return $provider === 'inpost';
    }

    public function getDeliveryStatus(array $package): ?array
    {
        $shipmentId = trim((string) ($package['shipment_id'] ?? ''));
        if ($shipmentId === '') {
            return null;
        }

        return $this->fetchStatus($shipmentId);
    }

    private function fetchStatus(string $shipmentId): ?array
    {
        try {
            $token = $this->resolveToken();
            if ($token === null) {
                return null;
            }

            $settings = $this->inpostRepository->getSettings();
            $env = (string) ($settings['environment'] ?? 'sandbox');
            $url = $this->apiBaseUrl($env) . '/shipments/' . rawurlencode($shipmentId);

            $response = $this->apiRequest($url, $token);
            $rawStatus = strtolower(trim((string) ($response['status'] ?? '')));

            return $rawStatus !== '' ? [
                'status' => DeliveryStatus::normalize('inpost', $rawStatus),
                'status_raw' => $rawStatus,
                'description' => DeliveryStatus::description('inpost', $rawStatus),
            ] : null;
        } catch (Throwable) {
            return null;
        }
    }

    private function resolveToken(): ?string
    {
        $token = $this->inpostRepository->getDecryptedToken();
        return ($token !== null && trim($token) !== '') ? trim($token) : null;
    }

    private function apiBaseUrl(string $environment): string
    {
        return strtolower(trim($environment)) === 'production'
            ? self::API_BASE_PRODUCTION
            : self::API_BASE_SANDBOX;
    }

    /**
     * @return array<string, mixed>
     */
    private function apiRequest(string $url, string $token): array
    {
        $ch = curl_init($url);
        if ($ch === false) {
            return [];
        }

        $opts = [
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_TIMEOUT => 15,
            CURLOPT_CONNECTTIMEOUT => 5,
            CURLOPT_SSL_VERIFYPEER => true,
            CURLOPT_SSL_VERIFYHOST => 2,
            CURLOPT_HTTPHEADER => [
                'Authorization: Bearer ' . $token,
                'Accept: application/json',
            ],
        ];

        $caPath = SslCertificateResolver::resolve();
        if ($caPath !== null) {
            $opts[CURLOPT_CAINFO] = $caPath;
        }

        curl_setopt_array($ch, $opts);
        $body = curl_exec($ch);
        $httpCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $ch = null;

        if ($body === false || $httpCode < 200 || $httpCode >= 300) {
            return [];
        }

        $json = json_decode((string) $body, true);
        return is_array($json) ? $json : [];
    }

}