<?php

include('Connection.php');

class Register
{

    private $_error = [
        "emptyerror" => "Bitte fülle alle Felder aus!",
        "mailerror" => "Deine E-mail Adresse ist ungültig!",
        "repwerror" => "Deine Passwörter stimmen nicht überein, bitte überprüfe deine Angaben!",
        "existmailerror" => "Diese E-mail Adresse wird bereits benutzt!",
        "existaccountnameerror" => "Dieser Benutzername ist bereits vergeben!",
        "bothexisterror" => "E-mail und Benutzername ist bereits vergeben!"
    ];

    public function __construct()
    {
        session_start();
        if (isset($_SESSION['username'])) {
            header("Location: ./index.php");
            exit;
        }
    }

    public function register($username, $mail, $password, $repassword)
    {
        $connection = Connection::get();

        if (!empty($username) && !empty($mail) && !empty($password) && !empty($repassword)) {
            if (filter_var($mail, FILTER_VALIDATE_EMAIL)) {
                $existcheck = $connection->query("SELECT * FROM users WHERE username = '" . $connection->real_escape_string($username) . "' OR mail = '" . $connection->real_escape_string($mail) . "'");
                if ($existcheck->num_rows > 0) {
                    $existcheck = $existcheck->fetch_object();


                    if ($existcheck->username == $username && $existcheck->mail == $mail) {
                        echo $this->_error["bothexisterror"];
                    } elseif ($existcheck->mail == $mail) {
                        echo $this->_error["existmailerror"];
                    } elseif ($existcheck->username == $username) {
                        echo $this->_error["existaccountnameerror"];
                    }
                } else {
                    if ($password == $repassword) {
                        $password = md5($password);
                        $userimport = $connection->query("INSERT INTO users (username, password, mail) VALUES ('$username', '$password', '$mail')");
                        $user_query = $connection->query("SELECT * FROM users WHERE id = '" . $connection->insert_id . "'");
                        $user = $user_query->fetch_object();

                        $_SESSION['username'] = $user->username;
                        $_SESSION['password'] = $user->password;
                        $_SESSION['avatar'] = $user->avatar;
                        $_SESSION['id'] = $user->id;
                        header("Location: ./index.php");
                        exit;

                    } else {
                        echo $this->_error["repwerror"];
                    }
                }
            } else {
                echo $this->_error["mailerror"];
            }
        } else {
            echo $this->_error["emptyerror"];
        }
    }
}