<?php
declare(strict_types=1);

require_once dirname(__DIR__) . DIRECTORY_SEPARATOR . 'config.php';

function is_logged_in(): bool
{
    return isset($_SESSION['admin_logged_in']) && $_SESSION['admin_logged_in'] === true;
}

function login(string $username, string $password): bool
{
    if ($username === ADMIN_USERNAME && $password === ADMIN_PASSWORD) {
        $_SESSION['admin_logged_in'] = true;
        $_SESSION['admin_username'] = $username;
        return true;
    }

    return false;
}

function logout(): void
{
    $_SESSION = [];
    if (ini_get('session.use_cookies')) {
        $params = session_get_cookie_params();
        setcookie(session_name(), '', time() - 42000, $params['path'], $params['domain'], $params['secure'], $params['httponly']);
    }
    session_destroy();
}

function require_login(): void
{
    if (!is_logged_in()) {
        header('Location: login.php');
        exit;
    }
}