<?php
session_start();

// Error reporting
if (getenv('DEBUG_MODE') === 'true') {
    ini_set('display_errors', 1);
    ini_set('display_startup_errors', 1);
    error_reporting(E_ALL);
} else {
    ini_set('display_errors', 0);
    error_reporting(0);
}

// Load environment variables
$env = parse_ini_file(__DIR__ . '/../.env');

// Database configuration
define('DB_SERVER', getenv('DB_SERVER') ?: 'localhost');
define('DB_USERNAME', getenv('DB_USERNAME') ?: 'root');
define('DB_PASSWORD', getenv('DB_PASSWORD') ?: '');
define('DB_NAME', getenv('DB_NAME') ?: 'shubraveil_db');

// Site configuration
define('SITE_NAME', 'ShubraVeil');
define('SITE_URL', getenv('SITE_URL') ?: 'https://localhost/shubraveil');
define('UPLOAD_PATH', __DIR__ . '/../uploads');
define('ALLOWED_IMAGE_TYPES', ['image/jpeg', 'image/png', 'image/webp']);
define('MAX_IMAGE_SIZE', 5 * 1024 * 1024); // 5MB

// Email configuration
define('SMTP_HOST', $env['SMTP_HOST']);
define('SMTP_PORT', $env['SMTP_PORT']);
define('SMTP_USERNAME', $env['SMTP_USERNAME']);
define('SMTP_PASSWORD', $env['SMTP_PASSWORD']);
define('SMTP_FROM_EMAIL', $env['SMTP_FROM_EMAIL']);
define('SMTP_FROM_NAME', $env['SMTP_FROM_NAME']);

// Security configuration
define('JWT_SECRET', $env['JWT_SECRET']);
define('RECAPTCHA_SITE_KEY', $env['RECAPTCHA_SITE_KEY']);
define('RECAPTCHA_SECRET_KEY', $env['RECAPTCHA_SECRET_KEY']);

// Cache configuration
define('CACHE_ENABLED', true);
define('CACHE_PATH', __DIR__ . '/../cache');
define('CACHE_DURATION', 3600); // 1 hour

// Time zone
date_default_timezone_set('Africa/Cairo');

// Functions
function sanitize_input($data) {
    global $conn;
    return mysqli_real_escape_string($conn, htmlspecialchars(trim($data)));
}

function generate_csrf_token() {
    if (!isset($_SESSION['csrf_token'])) {
        $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
    }
    return $_SESSION['csrf_token'];
}

function verify_csrf_token($token) {
    return isset($_SESSION['csrf_token']) && hash_equals($_SESSION['csrf_token'], $token);
}

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

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

function redirect($path) {
    header("Location: " . SITE_URL . $path);
    exit();
}

function flash_message($type, $message) {
    $_SESSION['flash'] = [
        'type' => $type,
        'message' => $message
    ];
}

function get_flash_message() {
    if (isset($_SESSION['flash'])) {
        $flash = $_SESSION['flash'];
        unset($_SESSION['flash']);
        return $flash;
    }
    return null;
}

// API Response helper
function json_response($data, $status = 200) {
    header('Content-Type: application/json');
    http_response_code($status);
    echo json_encode($data);
    exit();
}