<?php

require __DIR__ . "/util.php";
require __DIR__ . "/db.php";
require __DIR__ . "/logger.php";

session_start();

$siteKey = defined("AUTH_SITE_KEY") ? AUTH_SITE_KEY : ($_SERVER["HTTP_HOST"] ?? "unknown");
$siteKey = is_string($siteKey) ? trim($siteKey) : "unknown";

if (!auth_is_valid_site_key($siteKey)) {
    auth_log_event([
        "ip" => auth_get_client_ip(),
        "siteKey" => $siteKey,
        "status" => "invalid_payload",
    ]);
    header("Location: /auth/login.html");
    exit;
}

$userId = (int) ($_SESSION["auth_user_id"] ?? 0);
if ($userId <= 0) {
    $redirect = $_SERVER["REQUEST_URI"] ?? "/";
    header("Location: /auth/login.html?siteKey=" . urlencode($siteKey) . "&redirect=" . urlencode($redirect));
    exit;
}

$db = auth_get_db();
$stmt = $db->prepare("SELECT 1 FROM user_access WHERE user_id = ? AND site_key = ? LIMIT 1");
$stmt->bind_param("is", $userId, $siteKey);
$stmt->execute();
$result = $stmt->get_result();
$hasAccess = $result && $result->num_rows > 0;
$stmt->close();

if (!$hasAccess) {
    auth_log_event([
        "ip" => auth_get_client_ip(),
        "userId" => $userId,
        "siteKey" => $siteKey,
        "status" => "access_denied",
    ]);
    header("Location: /auth/login.html?siteKey=" . urlencode($siteKey));
    exit;
}