<?php
/**
 * Fociz Pure PHP HTTP Client Helper
 * Ondersteunt cURL met automatische fallback naar stream wrappers (file_get_contents).
 */

if (!function_exists('fociz_http_request')) {
    /**
     * Voert een HTTP request uit en retourneert de statuscode, body en geparsede JSON.
     *
     * @param string $url
     * @param array $options [
     *   'method' => 'GET'|'POST'|'PUT'|'DELETE',
     *   'headers' => ['Header-Name: Value'] of ['Header-Name' => 'Value'],
     *   'body' => string|array,
     *   'timeout' => int (seconden, default 12),
     *   'verify_ssl' => bool (default true)
     * ]
     * @return array ['status' => int, 'body' => string, 'json' => ?array, 'error' => ?string]
     */
    function fociz_http_request(string $url, array $options = []): array {
        $method = strtoupper($options['method'] ?? 'GET');
        $timeout = (int)($options['timeout'] ?? 12);
        $verifySsl = $options['verify_ssl'] ?? true;
        
        // Normaliseer headers naar 'Name: Value' regels
        $rawHeaders = $options['headers'] ?? [];
        $headerLines = [];
        foreach ($rawHeaders as $k => $v) {
            if (is_numeric($k)) {
                $headerLines[] = $v;
            } else {
                $headerLines[] = "{$k}: {$v}";
            }
        }

        // Bereid payload voor
        $body = $options['body'] ?? null;
        if (is_array($body)) {
            $hasJsonHeader = false;
            foreach ($headerLines as $h) {
                if (stripos($h, 'application/json') !== false) {
                    $hasJsonHeader = true;
                    break;
                }
            }
            if ($hasJsonHeader) {
                $body = json_encode($body);
            } else {
                $body = http_build_query($body);
                $headerLines[] = 'Content-Type: application/x-www-form-urlencoded';
            }
        }

        // Voeg standaard User-Agent toe als die er niet is
        $hasUserAgent = false;
        foreach ($headerLines as $h) {
            if (stripos($h, 'User-Agent:') !== false) {
                $hasUserAgent = true;
                break;
            }
        }
        if (!$hasUserAgent) {
            $headerLines[] = 'User-Agent: Fociz-Integrations/1.0';
        }

        // 1. Probeer cURL indien beschikbaar
        if (extension_loaded('curl')) {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 6);
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
            curl_setopt($ch, CURLOPT_HTTPHEADER, $headerLines);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, $verifySsl);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, $verifySsl ? 2 : 0);

            if ($body !== null && in_array($method, ['POST', 'PUT', 'PATCH', 'DELETE'])) {
                curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
            }

            $responseBody = curl_exec($ch);
            $curlError = curl_error($ch);
            $statusCode = (int)curl_getinfo($ch, CURLINFO_HTTP_CODE);
            curl_close($ch);

            if ($responseBody === false && !empty($curlError)) {
                return [
                    'status' => $statusCode ?: 0,
                    'body' => '',
                    'json' => null,
                    'error' => "cURL fout: {$curlError}"
                ];
            }

            $parsedJson = json_decode((string)$responseBody, true);

            return [
                'status' => $statusCode,
                'body' => (string)$responseBody,
                'json' => is_array($parsedJson) ? $parsedJson : null,
                'error' => null
            ];
        }

        // 2. Fallback: PHP Streams (file_get_contents)
        $contextOptions = [
            'http' => [
                'method' => $method,
                'header' => implode("\r\n", $headerLines),
                'timeout' => $timeout,
                'ignore_errors' => true // Zorgt dat we ook bij 4xx / 5xx responses de body en statuscode kunnen lezen
            ],
            'ssl' => [
                'verify_peer' => $verifySsl,
                'verify_peer_name' => $verifySsl
            ]
        ];

        if ($body !== null && in_array($method, ['POST', 'PUT', 'PATCH', 'DELETE'])) {
            $contextOptions['http']['content'] = $body;
        }

        $context = stream_context_create($contextOptions);
        $responseBody = @file_get_contents($url, false, $context);

        $statusCode = 0;
        if (!empty($http_response_header)) {
            // Zoek de laatste HTTP status regel (bij eventuele redirects)
            foreach (array_reverse($http_response_header) as $hdr) {
                if (preg_match('#HTTP/\d\.\d\s+(\d{3})#i', $hdr, $matches)) {
                    $statusCode = (int)$matches[1];
                    break;
                }
            }
        }

        if ($responseBody === false) {
            $lastErr = error_get_last();
            return [
                'status' => $statusCode ?: 0,
                'body' => '',
                'json' => null,
                'error' => 'Stream fout: ' . ($lastErr['message'] ?? 'Kan verbinding niet voltooien')
            ];
        }

        $parsedJson = json_decode((string)$responseBody, true);

        return [
            'status' => $statusCode,
            'body' => (string)$responseBody,
            'json' => is_array($parsedJson) ? $parsedJson : null,
            'error' => null
        ];
    }
}