<?php
define('DB_HOST', 'localhost');
define('DB_NAME', 'j87741579_smm');
define('DB_USER', 'j87741579_smm');
define('DB_PASS', 'em5rqTu)2nfv');
define('DB_PREFIX', '');

define('APP_URL', 'https://' . $_SERVER['HTTP_HOST'] . dirname($_SERVER['PHP_SELF'], 2));
define('APP_VERSION', '1.0.0');
define('APP_NAME', 'SMM Panel');

try {
    $pdo = new PDO('mysql:host=' . DB_HOST . ';dbname=' . DB_NAME . ';charset=utf8mb4', DB_USER, DB_PASS, [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        PDO::ATTR_EMULATE_PREPARES => false
    ]);
} catch (PDOException $e) {
    die('Database connection failed: ' . $e->getMessage());
}

if (session_status() === PHP_SESSION_NONE) {
    session_start();
}

function getSetting($key) {
    global $pdo;
    $stmt = $pdo->prepare('SELECT setting_value FROM ' . DB_PREFIX . 'settings WHERE setting_key = ?');
    $stmt->execute([$key]);
    $result = $stmt->fetch();
    return $result ? $result['setting_value'] : null;
}

function isLoggedIn() {
    return isset($_SESSION['user_id']);
}

function isAdmin() {
    return isset($_SESSION['user_role']) && $_SESSION['user_role'] === 'admin';
}

function requireAuth() {
    if (!isLoggedIn()) {
        header('Location: login.php');
        exit;
    }
}

function requireAdmin() {
    requireAuth();
    if (!isAdmin()) {
        header('Location: index.php');
        exit;
    }
}

function sanitize($data) {
    return htmlspecialchars(trim($data), ENT_QUOTES, 'UTF-8');
}