<?php

class App_Service_WebServiceV1Auth
{

    //ERRORI GENERATI DALLO ZEND_AUTH RICODIFICATI DA ME
    const NO_CREDENTIAL_CLOUDUSER = 'V1AUTH_ERROR_NO_CREDENTIAL_CLOUDUSER';
    const FAILURE_IDENTITY_NOT_FOUND = 'V1AUTH_ERROR_FAILURE_IDENTITY_NOT_FOUND';
    const FAILURE_CREDENTIAL_INVALID = 'V1AUTH_ERROR_FAILURE_CREDENTIAL_INVALID';
    const ACCOUNT_DEACTIVATED = 'V1AUTH_ERROR_ACCOUNT_DEACTIVATED';
    const FAILURE = 'V1AUTH_ERROR_FAILURE';

    protected $_model;
    protected $_auth;
    protected $_configs;
    protected $_ipManager;

    public function __construct()
    {
        $this->_model = new Application_Model_Generic();
        $this->_configs = new App_Service_ConfigManager();
        $this->_ipManager = new App_Service_IpManager();
    }

    public function authenticate($username, $password, $staylogin = 0)
    {
        $adapter = $this->getAuthAdapter(array('username' => $username, 'password' => $password));
        $auth = $this->getAuth();
        $result = $auth->authenticate($adapter);

        if (!$result->isValid()) {
            return $result->getCode();
        }

        $user = (array)$adapter->getResultRowObject();
        if (!$user['stato']) {
            return self::ACCOUNT_DEACTIVATED;
        }

        //Generazione del Token temporaneo per l'accesso
        if ($user['token'] != null) {
            $token = $user['token']; //Esistente uso quello già presente
        } else {
            do { //se non esiste ne genero uno nuovo e controllo che sia univoco
                $token = hash('sha1', $user['username'] . date('H:i:s') . mt_rand(5, 10));
                if ($this->_model->getByColumnName('Users', 'token', $token)) {
                    $exist = true;
                } else {
                    $exist = false;
                }
                $user['token'] = $token;
            } while ($exist);
        }

        //Imposto il DB MONGO dell'utente
        $mongoDbName = $this->_ipManager->getMongoDbName($user['NomeDB']);
        if(Zend_Registry::isRegistered(App_Model_Mongo_Adapter::MONGO_DB_ADAPTER_REG_NAME))
            Zend_Registry::get(App_Model_Mongo_Adapter::MONGO_DB_ADAPTER_REG_NAME)->setDbname($mongoDbName);
        else
            Zend_Registry::set(App_Model_Mongo_Adapter::MONGO_DB_NAME, $mongoDbName);

        //Memorizzo l'ultimo accesso dell'utente
        $this->_model->update('Users', $user['id'], array(
                'token' => $token,
                'UltimoLogin' => date('Y-m-d H:i:s'),
                'staylogin' => $staylogin)
        );

        $auth->getStorage()->write($user);

        return $user;
    }

    public function getAuth()
    {
        if (null === $this->_auth) {
            $this->_auth = Zend_Auth::getInstance();
            $this->_auth->setStorage(new Zend_Auth_Storage_Session('Web_Auth'));
        }
        return $this->_auth;
    }

    public function getIdentity()
    {
        $auth = $this->getAuth();
        if ($auth->hasIdentity()) {
            return $auth->getIdentity();
        }
        return false;
    }

    public function clear()
    {
        $this->getAuth()->clearIdentity();
    }

    public function getAuthAdapter($values)
    {
        $salt = Zend_Registry::get('ENVIROMENTS')->get('password_salt');
        $authAdapter = new Zend_Auth_Adapter_DbTable(
            Zend_Db_Table_Abstract::getDefaultAdapter(),
            'users',
            'username',
            'password',
            "MD5(CONCAT('$salt',?))"
        );
        $authAdapter->setIdentity($values['username']);
        $authAdapter->setCredential($values['password']);
        return $authAdapter;
    }
}