<?php

class EcomZoneClient
{
    private $apiToken;
    private $apiUrl;

    public function __construct()
    {
        // Hardcoded API token for testing
        $this->apiToken = 'klRyAdrXaxL0s6PEUp7LDlH6T8aPSCtBY8NiEHsHiWpc6646K2TZPi5KMxUg';
        $this->apiUrl = Configuration::get('ECOMZONE_API_URL');
        
        if (empty($this->apiUrl)) {
            throw new Exception('API URL not configured');
        }
    }

    public function getCatalog($page = 1, $perPage = 100)
    {
        $url = $this->apiUrl . '/catalog?page=' . $page . '&per_page=' . $perPage;
        
        EcomZoneLogger::log("Making API request", 'INFO', ['url' => $url]);
        return $this->makeRequest('GET', $url);
    }

    public function getProduct($sku)
    {
        return $this->makeRequest('GET', $this->apiUrl . '/product/' . $sku);
    }

    public function createOrder($orderData)
    {
        return $this->makeRequest('POST', $this->apiUrl . '/ordering', $orderData);
    }

    public function getOrder($orderId)
    {
        return $this->makeRequest('GET', $this->apiUrl . '/order/' . $orderId);
    }

    private function makeRequest($method, $url, $data = null)
    {
        $retryCount = 0;
        $maxRetries = 5;
        $backoff = 1; // initial backoff time in seconds
                    do {
                        $curl = curl_init();
                        $headers = [
                            'Authorization: Bearer ' . $this->apiToken,
                            'Accept: application/json',
                            'Content-Type: application/json',
                        ];
                    
                        $options = [
                            CURLOPT_URL => $url,
                            CURLOPT_RETURNTRANSFER => true,
                            CURLOPT_ENCODING => '',
                            CURLOPT_MAXREDIRS => 10,
                            CURLOPT_TIMEOUT => 30,
                            CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
                            CURLOPT_CUSTOMREQUEST => $method,
                            CURLOPT_HTTPHEADER => $headers,
                            CURLOPT_SSL_VERIFYPEER => false, // Temporarily disable SSL verification for testing
                        ];
                    
                        if ($data !== null) {
                            $options[CURLOPT_POSTFIELDS] = json_encode($data);
                        }
                    
                        curl_setopt_array($curl, $options);
                    
                        $response = curl_exec($curl);
                        $err = curl_error($curl);
                        $httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
                    
                        EcomZoneLogger::log("API Response", 'INFO', [
                            'url' => $url,
                            'method' => $method,
                            'http_code' => $httpCode,
                            'curl_error' => $err,
                            'response' => $response
                        ]);
                    
                        curl_close($curl);
                    
                        if ($err) {
                            if (strpos($err, 'Connection timed out') !== false && $retryCount < $maxRetries) {
                                EcomZoneLogger::log("Connection timed out. Retrying in $backoff seconds...", 'WARNING');
                                sleep($backoff);
                                $backoff *= 2; // exponential backoff
                                $retryCount++;
                            } else {
                                throw new Exception('cURL Error: ' . $err);
                            }
                        } else if ($httpCode >= 400) {
                            throw new Exception('API Error: HTTP ' . $httpCode . ' - ' . $response);
                        } else {
                            $decodedResponse = json_decode($response, true);
                            if (json_last_error() !== JSON_ERROR_NONE) {
                                throw new Exception('Invalid JSON response: ' . json_last_error_msg());
                            }
                            return $decodedResponse;
                        }
                    } while ($retryCount < $maxRetries);
                        }
}