<?php

declare(strict_types=1);

namespace App\Services\JoFotara;

use GuzzleHttp\Client;
use App\Core\Redis;
use Exception;

final class JoFotaraGateway
{
    private Client $client;
    private string $baseUrl;

    public function __construct()
    {
        $this->client = new Client();
        $this->baseUrl = $_ENV['JOFOTARA_BASE_URL'] ?? 'https://backend.jofotara.gov.jo/core/invoices';
    }

    /**
     * Submit invoice to JoFotara with Circuit Breaker
     */
    public function submitInvoice(string $companyId, string $xmlBase64, array $credentials): array
    {
        $cbKey = "cb:jofotara:{$companyId}";
        if ($this->isCircuitOpen($cbKey)) {
            throw new Exception("بوابة جو-فواتير غير متاحة حالياً لهذه الشركة، يرجى المحاولة لاحقاً");
        }

        try {
            $response = $this->client->post($this->baseUrl, [
                'json' => [
                    'clientId' => $credentials['clientId'],
                    'secretKey' => $credentials['secretKey'],
                    'invoiceType' => 'invoice',
                    'invoiceData' => $xmlBase64
                ],
                'timeout' => 30
            ]);

            $result = json_decode($response->getBody()->getContents(), true);
            $this->resetFailures($cbKey);
            
            return $result;
        } catch (\Throwable $e) {
            $this->recordFailure($cbKey);
            throw $e;
        }
    }

    private function isCircuitOpen(string $key): bool
    {
        $redis = Redis::getInstance();
        return (bool)$redis->get("{$key}:open");
    }

    private function recordFailure(string $key): void
    {
        $redis = Redis::getInstance();
        $failures = (int)$redis->incr("{$key}:failures");
        
        if ($failures >= 5) {
            $redis->setex("{$key}:open", 300, 1); // Open for 5 minutes
        }
    }

    private function resetFailures(string $key): void
    {
        $redis = Redis::getInstance();
        $redis->del(["{$key}:failures", "{$key}:open"]);
    }
}