<?php
namespace UnicaenAuth\Service;

use PDOException;
use UnicaenApp\Exception;
use UnicaenApp\Service\Ldap\People as LdapPeopleService;
use UnicaenAuth\Options\ModuleOptions;
use Zend\ServiceManager\ServiceManager;
use Zend\ServiceManager\ServiceManagerAwareInterface;
use ZfcUser\Authentication\Adapter\AdapterChainEvent as AuthEvent;
use ZfcUser\Options\AuthenticationOptionsInterface;

/**
 * Service d'enregistrement dans la table des utilisateurs de l'application 
 * de l'utilisateur authentifié avec succès.
 *
 * @author Bertrand GAUTHIER <bertrand.gauthier at unicaen.fr>
 */
class User implements ServiceManagerAwareInterface
{
    /**
     * @var ServiceManager
     */
    protected $serviceManager;

    /**
     * @var ModuleOptions
     */
    protected $options;

    /**
     * @var AuthenticationOptionsInterface
     */
    protected $zfcUserOptions;
    
    /**
     * @var LdapPeopleService
     */
    protected $ldapPeopleService;
    
    /**
     * Save authenticated user in database from LDAP data.
     * 
     * @return bool
     */
    public function userAuthenticated(AuthEvent $e)
    {
        if (!$this->getOptions()->getSaveLdapUserInDatabase()) {
            return false;
        }
        if (!($username = $e->getIdentity())) {
            return false;
        }
        
        if (is_int($username)) {
            // c'est un id: l'utilisateur existe déjà dans la bdd (et pas dans le LDAP), rien à faire
            return true;
        }
        
        if (!is_string($username)) {
            throw new Exception("Identité rencontrée inattendue.");
        }
        
        // recherche de l'individu dans l'annuaire LDAP
        $ldapPeople = $this->getLdapPeopleService()->getMapper()->findOneByUsername($username);
        if (!$ldapPeople) {
            return false;
        }
        
        // update/insert de l'utilisateur dans la table de l'appli
        $mapper = $this->getServiceManager()->get('zfcuser_user_mapper'); /* @var $mapper \ZfcUser\Mapper\User */
        try {
            $entity = $mapper->findByUsername($username);
        }
        catch (PDOException $pdoe) {
            throw new Exception(
                    "Erreur lors de la recherche de l'utilisateur '$username' dans la base de données : " . $pdoe->getMessage(),
                    null,
                    $pdoe);
            return true;
        }
        if (!$entity) {
            $entityClass = $this->getZfcUserOptions()->getUserEntityClass();
            $entity = new $entityClass;
            $entity->setUsername($username);
            $method = 'insert';
        }
        else {
            $method = 'update';
        }
        $entity->setEmail($ldapPeople->getMail());
        $entity->setDisplayName($ldapPeople->getDisplayName());
        $entity->setPassword('ldap');
        $entity->setState(in_array('deactivated', ldap_explode_dn($ldapPeople->getDn(), 1)) ? 0 : 1);
        try {
            $mapper->$method($entity);
        }
        catch (PDOException $pdoe) {
            throw new Exception(
                    "Erreur lors de l'enregistrement de l'utilisateur '$username' dans la base de données : " . $pdoe->getMessage(),
                    null,
                    $pdoe);
            return true;
        }
        
        return true;
    }
    
    /**
     * Retrieve service manager instance
     *
     * @return ServiceManager
     */
    public function getServiceManager()
    {
        return $this->serviceManager;
    }

    /**
     * Set service manager
     *
     * @param ServiceManager $serviceManager
     */
    public function setServiceManager(ServiceManager $serviceManager)
    {
        $this->serviceManager = $serviceManager;
    }

    /**
     * get ldap people service
     * 
     * @return LdapPeopleService
     */
    public function getLdapPeopleService()
    {
        if (null === $this->ldapPeopleService) {
            $this->ldapPeopleService = $this->getServiceManager()->get('ldap_people_service');
        }
        return $this->ldapPeopleService;
    }

    /**
     * set ldap people service
     *  
     * @param LdapPeopleService $service
     * @return User
     */
    public function setLdapPeopleService(LdapPeopleService $service)
    {
        $this->ldapPeopleService = $service;
        return $this;
    }

    /**
     * @param ModuleOptions $options
     */
    public function setOptions(ModuleOptions $options)
    {
        $this->options = $options;
    }

    /**
     * @return ModuleOptions
     */
    public function getOptions()
    {
        if (!$this->options instanceof ModuleOptions) {
            $this->setOptions($this->getServiceManager()->get('unicaen-auth_module_options'));
        }
        return $this->options;
    }

    /**
     * @param AuthenticationOptionsInterface $options
     */
    public function setZfcUserOptions(AuthenticationOptionsInterface $options)
    {
        $this->zfcUserOptions = $options;
    }

    /**
     * @return AuthenticationOptionsInterface
     */
    public function getZfcUserOptions()
    {
        if (!$this->zfcUserOptions instanceof AuthenticationOptionsInterface) {
            $this->setZfcUserOptions($this->getServiceManager()->get('zfcuser_module_options'));
        }
        return $this->zfcUserOptions;
    }
}