<?php

class userLogin{

    protected $userDetails;

    public static function staticUserLogin(array $userDetails = NULL){

        //check user login using userSession class
        //if true pass to self::userLoggedIn
        //if false pass to self::showLoginForm
        if($userDetails === NULL){
        $session = new userSession();
        return array ('userForm' => $session->output, 'userError' => $session->error,
                          'pageLogin' => $session->pageLogin);
        }
        elseif(isset($userDetails['userName']) && isset($userDetails['userPassword'])){
        $logMeIn = new userLogin();
        return $logMeIn->setUserDetails($userDetails);
        }
    }

    protected function setUserDetails($userDetails){
        $this->userDetails = $userDetails;
        return $this->checkLogin();
    }

    private function checkLogin(){
        $user="cwells";
        $pass="test";
        //check user login using userSession class if true
        //show page. If false return false
        $session = new userSession();
        if($this->userDetails['userName'] == $user && $this->userDetails['userPassword'] == $pass){
            return $session->setUserSession($this->userDetails['userName']);
        }
        else{
        return CREDENTIALS_INCORRECT;
        }
    }

    private function registerUser(){

        //echo the form

    }

}

class userUpdates extends userLogin{

    protected function __construct(){

    }

    protected function userChangePassword(){

    }

    protected function userChangeEmail(){

    }

}

class userSession{

    public $output;
    public $error;
    public $pageLogin;

    public function __construct(){
        if(!isset($_SESSION['userLogin']) && !isset($_SESSION['userName'])){
            $this->showLoginForm();
        }
        else{
            $this->checkLogin();
        }
        return $this->output;
        return $this->error;
        return $this->pageLogin;
    }

    private function checkLogin(){
    if($_SESSION['userLogin'] == true && mktime() - $_SESSION['userToken'] < 7){
        $this->output = LOGGED_IN;
        $_SESSION['userToken'] = mktime();
        $this->pageLogin = true;
    }
    elseif(mktime() - $_SESSION['userToken'] > 7){
        $this->destroySession();
        $this->error = SESSION_ERROR;
    }
    }

    public function setUserSession($userName){
        $_SESSION['userToken'] = mktime();
        $_SESSION['userName'] = $userName;
        $_SESSION['userLogin'] = true;
        $this->checkLogin();
        return $this->output;
        return $this->pageLogin;
    }

    public function destroySession(){
        session_unset();
        session_destroy();
        $this->showLoginForm();
    }

    public function showLoginForm(){
        $form  = '<h2 class="login">Login</h2>';
        $form .= '<form method="POST" action="login.php" name="login">';
        $form .= '<input type="text" name="userName" value="Username" class="login">';
        $form .= '<span class="spacer"></span>';
        $form .= '<input type="password" name="userPassword" value="Password" class="login">';
        $form .= '<span class="spacer"></span>';
        $form .= '<div id="lowerLogin">';
        $form .= '<a class="topNavMenu" href="register.php">Register</a></div>';
        $form .= '<input type="hidden" value=' .$_SERVER['REQUEST_URI']. ' name="pageReferer">';
        $form .= '<input type="submit" name="loginSubmit" value="Login" class="button">';
        $form .= '</form>';
        $this->output = $form;
        $this->pageLogin = false;

    }
}