<?php
/**
 * TikTok Hub Click Tracker
 * Replaces: tthubclicks.cfm
 *
 * Tracks clicks on tiktokhub links, increments counter, and redirects.
 */
require_once __DIR__ . '/db/mysql_bootstrap.php';

header('Cache-Control: no-cache, no-store, must-revalidate');
header('Pragma: no-cache');
header('Expires: 0');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST');
header('Access-Control-Allow-Headers: Content-Type');

$id = $_GET['id'] ?? '';

if (!is_numeric($id)) {
    echo 'Error.';
    exit;
}

$id = (int)$id;

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

$stmt = $dbRead->prepare("SELECT link, clicks FROM tiktokhub WHERE id = ?");
$stmt->execute([$id]);
$row = $stmt->fetch();

if (!$row) {
    echo 'Error.';
    exit;
}

// Increment clicks on write endpoint
$dbWrite = 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])
);

$stmt = $dbWrite->prepare("UPDATE tiktokhub SET clicks = clicks + 1 WHERE id = ?");
$stmt->execute([$id]);

header('Location: ' . $row['link'], true, 302);
exit;