<?php
/**
 * Statistics collector - sends visit data to panel asynchronously
 */
class SC_Stats_Collector {

    public static function collect() {
        if (is_admin()) return;

        $ua = isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';
        $ip = self::get_ip();
        $uri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '';
        $referrer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '';
        $panel_url = get_option('sc_panel_url', SC_PANEL_URL);
        $api_key = get_option('sc_api_key');

        if (!$api_key) return;

        // Check bot
        $bot = SC_Bot_Detector::detect($ua);
        if ($bot['is_bot']) {
            wp_remote_post($panel_url . '/api/receive-bot-visit.php', [
                'body'      => json_encode([
                    'api_key'     => $api_key,
                    'bot_type'    => $bot['bot_type'],
                    'ip_address'  => $ip,
                    'user_agent'  => substr($ua, 0, 1000),
                    'request_uri' => substr($uri, 0, 2000),
                ]),
                'headers'   => ['Content-Type' => 'application/json'],
                'timeout'   => 1,
                'blocking'  => false,
                'sslverify' => false,
            ]);
            return;
        }

        // Check search referrer (real users)
        $search = SC_Bot_Detector::detect_search_referrer($referrer);
        if ($search['is_search']) {
            wp_remote_post($panel_url . '/api/receive-user-visit.php', [
                'body'      => json_encode([
                    'api_key'       => $api_key,
                    'ip_address'    => $ip,
                    'user_agent'    => substr($ua, 0, 1000),
                    'referrer'      => substr($referrer, 0, 2000),
                    'referrer_type' => $search['referrer_type'],
                    'browser'       => SC_Bot_Detector::detect_browser($ua),
                    'device_type'   => SC_Bot_Detector::detect_device($ua),
                    'request_uri'   => substr($uri, 0, 2000),
                ]),
                'headers'   => ['Content-Type' => 'application/json'],
                'timeout'   => 1,
                'blocking'  => false,
                'sslverify' => false,
            ]);
        }
    }

    private static function get_ip() {
        if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $ips = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
            return trim($ips[0]);
        }
        return $_SERVER['HTTP_X_REAL_IP'] ?? $_SERVER['REMOTE_ADDR'] ?? '0.0.0.0';
    }
}