<?php
/**
 * Track Recommended/For You A/B Test Clicks
 * Replaces: track_rf.cfm
 *
 * Logs A/B test interactions to bway_bww.foryoutest with client IP detection.
 */
require_once __DIR__ . '/db/mysql_bootstrap.php';

header('Content-Type: application/json');

$type = $_GET['type'] ?? 'ROS';
$abTestName = $_GET['abTestName'] ?? '';
$abTestVariant = $_GET['abTestVariant'] ?? '';
$sortMethod = $_GET['sortMethod'] ?? '';
$articleId = $_GET['articleId'] ?? '';
$articleTitle = $_GET['articleTitle'] ?? '';

// Try to get the real IP from various possible sources
$cf_connecting_ip = $_SERVER['HTTP_CF_CONNECTING_IP'] ?? '';
$x_forwarded_for = $_SERVER['HTTP_X_FORWARDED_FOR'] ?? '';
$x_real_ip = $_SERVER['HTTP_X_REAL_IP'] ?? '';
$x_client_ip = $_SERVER['HTTP_X_CLIENT_IP'] ?? '';
$remote_addr = $_SERVER['REMOTE_ADDR'] ?? '';

$realIP = $cf_connecting_ip;
if (empty(trim($realIP)) && !empty(trim($x_forwarded_for))) {
    $ipList = explode(',', $x_forwarded_for);
    if (count($ipList) > 0) {
        $realIP = trim($ipList[0]);
    }
}
if (empty(trim($realIP))) $realIP = $x_real_ip;
if (empty(trim($realIP))) $realIP = $x_client_ip;
if (empty(trim($realIP))) $realIP = $remote_addr;

// Validate required parameters
if (empty(trim($abTestName)) || empty(trim($abTestVariant)) || empty(trim($sortMethod))) {
    echo json_encode(['success' => false, 'error' => 'Missing required parameters']);
    exit;
}

try {
    $db = new PDO(
        'mysql:host=amazonaurora.cluster-cemzxojvmybt.us-east-1.rds.amazonaws.com;dbname=amazonrds;charset=utf8mb4',
        'admin',
        'xxatN6Lb8Kbwb9MiU1At',
        mysqlPdoOptions([PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_EMULATE_PREPARES => false])
    );

    $numericArticleId = is_numeric($articleId) ? (int)$articleId : 0;

    $stmt = $db->prepare("INSERT INTO bway_bww.foryoutest (abtestname, variant, method, colid, typer, ipaddress) VALUES (?, ?, ?, ?, ?, ?)");
    $stmt->execute([$abTestName, $abTestVariant, $sortMethod, $numericArticleId, $type, $realIP]);

    $xffParsed = !empty(trim($x_forwarded_for)) ? trim(explode(',', $x_forwarded_for)[0]) : '';

    echo json_encode([
        'success' => true,
        'message' => 'Click tracked successfully',
        'debug' => [
            'cf_connecting_ip' => $cf_connecting_ip,
            'x_forwarded_for' => $x_forwarded_for,
            'x_forwarded_for_parsed' => $xffParsed,
            'real_ip' => $realIP
        ]
    ]);

} catch (Exception $e) {
    echo json_encode(['success' => false, 'error' => $e->getMessage()]);
}