<?php
declare(strict_types=1);

namespace Controller;

use Model\Session;
use Model\User;
use View\LoginRedirection;
use View\RegisterPage;
use View\Sendable;

class RegisterController extends RestrictedPageController
{
    public function __construct()
    {
        parent::__construct('/register.php');
    }

    protected function runLogic(): Sendable
    {
        $registerPage = new RegisterPage($this->context);
        if ($registerPage->formWasSent) {
            $registerPage->fieldUsername = trim($registerPage->fieldUsername);
            $error = false;

            // check username
            if (empty($registerPage->fieldUsername)) {
                $registerPage->errorUsernameEmpty = true;
                $error = true;
            } elseif (iconv_strlen($registerPage->fieldUsername) > 20) {
                $registerPage->errorUsernameTooLong = true;
                $error = true;
            }

            // check password
            if ($registerPage->fieldPassword != $registerPage->fieldRepeatPassword) {
                $registerPage->errorPasswordsMismatch = true;
                $error = true;
            } else if (empty($registerPage->fieldPassword)) {
                $registerPage->errorPasswordEmpty = true;
                $error = true;
            }

            // create account
            if (!$error) {
                $pwHash = password_hash($registerPage->fieldPassword, PASSWORD_ARGON2ID);
                $user = User::create($registerPage->fieldUsername, $pwHash);
                if (!empty($user)) {
                    $this->context->session = Session::create($user);
                    return new LoginRedirection($this->context);
                } else {
                    $registerPage->errorUsernameInUse = true;
                }
            }

            return $registerPage;
        } else {
            return $registerPage;
        }
    }
}