<?php

if (! function_exists('db')) {
    function db()
    {
        $config = new Core\Config;
        return new Core\Database\QueryBuilder(
            Core\Database\Connection::make($config->get('database'))
        );
    }
}

if (! function_exists('view')) {
    function view($name, $data = [])
    {
        if (isset($_SESSION['errors'])) {
            $data['errors'] = $_SESSION['errors'];
            unset($_SESSION['errors']);
        }
        if (isset($_SESSION['comment_errors'])) {
            $data['comment_errors'] = $_SESSION['comment_errors'];
            unset($_SESSION['comment_errors']);
        }
        if (isset($_SESSION['messages'])) {
            $data['messages'] = $_SESSION['messages'];
            unset($_SESSION['messages']);
        }
        if (isset($_SESSION['inputs'])) {
            $inputs = $_SESSION['inputs'];
            foreach ($inputs as $key => $value) {
                $data[$key] = $value;
            }
            unset($_SESSION['inputs']);
        }
        $blade = new Jenssegers\Blade\Blade('views', 'views/cache');
        $blade->compiler()->directive('markdown', function ($expression) {
            return "<?php echo markdown({$expression}) ?>";
        });
        return $blade->make($name)->with($data);
    }
}

if (! function_exists('markdown')) {
    function markdown($content)
    {
        $parsedown = new \Parsedown;
        $html = $parsedown->text($content);
        $config = \HTMLPurifier_Config::createDefault();
        $purifier = new \HTMLPurifier($config);
        return $purifier->purify($html);
    }
}

if (! function_exists('valid_username')) {
    function valid_username($username)
    {
        $sql = 'SELECT * FROM users WHERE name=?';
        $query = db()->prepare($sql);
        $query->execute([$username]);
        $user = $query->fetchAll(\PDO::FETCH_CLASS, 'Core\\Record');
        return strlen($username) <= 32 &&
               preg_match('/^[\w\d._]+$/', $username) &&
               ! count($user);
    }
}

if (! function_exists('valid_email')) {
    function valid_email($email)
    {
        $sql = 'SELECT * FROM users WHERE email=?';
        $query = db()->prepare($sql);
        $query->execute([$email]);
        $user = $query->fetchAll(\PDO::FETCH_CLASS, 'Core\\Record');
        return filter_var($email, FILTER_VALIDATE_EMAIL) &&
               ! count($user);
    }
}

if (! function_exists('valid_password')) {
    function valid_password($password1, $password2)
    {
        return preg_match('/^[!-~]+$/', $password1) &&
               $password1 == $password2;
    }
}

if (! function_exists('send_mail')) {
    function send_mail($options)
    {
        $config = new Core\Config;
        $mail = new PHPMailer\PHPMailer\PHPMailer(true);

        $mail->SMTPDebug = 0;
        $mail->isSMTP();
        $mail->Host = $config->get('mailer')['host'];
        $mail->SMTPAuth = true;
        $mail->Username = $config->get('mailer')['username'];
        $mail->Password = $config->get('mailer')['password'];
        $mail->SMTPSecure = 'tls';
        $mail->Port = 465;

        $mail->setFrom($config->get('mailer')['from']);
        $mail->addAddress($options['email']);

        $mail->isHTML(true);
        $mail->Subject = $options['title'];
        $mail->Body = $options['body'];
        $mail->send();
    }
}

if (! function_exists('port')) {
    function port()
    {
        $config = new Core\Config;
        return $config->get('port');
    }
}