<?php

namespace App\Controller;

use App\Entity\Group;
use App\Entity\Niveau01;
use App\Entity\User;
use App\Form\LoginType;
use App\Service\ApiService;
use App\Service\LdapService;
use Doctrine\Persistence\ManagerRegistry;
use Ramsey\Uuid\Uuid;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\KernelInterface;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;
use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;

class SecurityController extends AbstractController
{
    private $appKernel;
    private $tokenstorage;
    private $ldapservice;
    private $apiservice;

    public function __construct(KernelInterface $appKernel, TokenStorageInterface $tokenstorage, LdapService $ldapservice, ApiService $apiservice)
    {
        $this->appKernel = $appKernel;
        $this->tokenstorage = $tokenstorage;
        $this->ldapservice = $ldapservice;
        $this->apiservice = $apiservice;
    }

    public function noperm(Request $request)
    {
        return $this->render('Home/noperm.html.twig', [
            'useheader' => true,
            'usemenu' => false,
        ]);
    }

    public function login(Request $request, AuthenticationUtils $authenticationUtils, ManagerRegistry $em)
    {
        switch ($this->getParameter('appAuth')) {
            case 'SQL':
                return $this->loginSQL($request, $authenticationUtils, $em);
                break;

            case 'CAS':
                return $this->loginCAS($request, $authenticationUtils, $em);
                break;

            case 'LDAP':
                return $this->loginLDAP($request, $authenticationUtils, $em);
                break;

            case 'OPENID':
                return $this->loginOPENID($request, $authenticationUtils, $em);
                break;
        }
    }

    public function loginSQL(Request $request, AuthenticationUtils $authenticationUtils, ManagerRegistry $em)
    {
        return $this->render('Home/loginSQL.html.twig', [
            'last_username' => $authenticationUtils->getLastUsername(),
            'error' => $authenticationUtils->getLastAuthenticationError(),
        ]);
    }

    public function loginCAS(Request $request, AuthenticationUtils $authenticationUtils, ManagerRegistry $em)
    {
        // Récupération de la cible de navigation
        $redirect = $request->getSession()->get('_security.main.target_path');

        // Masteridentity
        $appMasteridentity = $this->getParameter('appMasteridentity');

        // Init Client CAS
        $alias = $this->getParameter('appAlias');
        \phpCAS::setDebug($this->appKernel->getProjectDir().'/var/log/cas.log');
        \phpCAS::client(CAS_VERSION_2_0, $this->getParameter('casHost'), intval($this->getParameter('casPort')), is_null($this->getParameter('casPath')) ? '' : $this->getParameter('casPath'), false);
        \phpCAS::setNoCasServerValidation();

        // Authentification
        \phpCAS::forceAuthentication();

        // Récupération UID
        $username = \phpCAS::getUser();

        // Récupération Attribut
        $attributes = \phpCAS::getAttributes();

        // Init
        $email = "$username@nomail.fr";
        $lastname = $username;
        $firstname = ' ';
        $avatar = 'noavatar.png';

        // Rechercher l'utilisateur
        if (isset($attributes[$this->getParameter('casUsername')])) {
            $username = $attributes[$this->getParameter('casUsername')];
        }

        if (isset($attributes[$this->getParameter('casEmail')])) {
            $email = $attributes[$this->getParameter('casEmail')];
        }

        if (isset($attributes[$this->getParameter('casLastname')])) {
            $lastname = $attributes[$this->getParameter('casLastname')];
        }

        if (isset($attributes[$this->getParameter('casFirstname')])) {
            $firstname = $attributes[$this->getParameter('casFirstname')];
        }

        if (isset($attributes[$this->getParameter('casAvatar')])) {
            $avatar = $attributes[$this->getParameter('casAvatar')];
        }

        // Rechercher l'utilisateur
        $user = $em->getRepository('App\Entity\User')->findOneBy(['username' => $username]);
        if (!$user) {
            if (!$this->getParameter('casAutosubmit')) {
                return $this->redirect($this->generateUrl('app_noperm'));
            }

            $this->submitSSONiveau01($attributes, $em);
            $this->submitSSOGroup($attributes, $em);
            $niveau01 = $em->getRepository('App\Entity\Niveau01')->calculateSSONiveau01($attributes);
            $user = $this->submituser($username, $firstname, $lastname, $email, $avatar, $niveau01, $em);
            $user = $em->getRepository('App\Entity\Group')->calculateSSOGroup($user, $attributes);
        } elseif ($this->getParameter('casAutoupdate')) {
            if (!$user->Isactive()) {
                return $this->redirect($this->generateUrl('app_noperm'));
            }
            $this->submitSSONiveau01($attributes, $em);
            $this->submitSSOGroup($attributes, $em);
            $this->updateuser($user, $firstname, $lastname, $email, $avatar, $em);
            $user = $em->getRepository('App\Entity\Group')->calculateSSOGroup($user, $attributes);
        }

        // Autoconnexion
        return $this->autoconnexion($user, $redirect, $request);
    }

    public function loginLDAP(Request $request, AuthenticationUtils $authenticationUtils, ManagerRegistry $em)
    {
        // Création du formulaire
        $form = $this->createForm(LoginType::class);

        // Récupération des data du formulaire
        $form->handleRequest($request);

        // Affichage du formulaire
        return $this->render('Home/loginLDAP.html.twig', [
            'useheader' => false,
            'usemenu' => false,
            'usesidebar' => false,
            'form' => $form->createView(),
        ]);
    }

    public function loginldapcheck(Request $request, AuthenticationUtils $authenticationUtils, ManagerRegistry $em)
    {
        $username = $request->get('login')['username'];
        $password = $request->get('login')['password'];

        // Récupération de la cible de navigation
        $redirect = $request->getSession()->get('_security.main.target_path');

        // L'utilisateur se co à l'annuaire
        $userldap = $this->ldapservice->userconnect($username, $password);
        if ($userldap) {
            $userldap = $userldap[0];

            // Init
            $email = "$username@nomail.fr";
            $lastname = $username;
            $firstname = ' ';
            $avatar = 'noavatar.png';

            // Rechercher l'utilisateur
            if (isset($userldap[$this->getParameter('ldapFirstname')])) {
                $firstname = $userldap[$this->getParameter('ldapFirstname')];
            }

            if (isset($userldap[$this->getParameter('ldapLastname')])) {
                $lastname = $userldap[$this->getParameter('ldapLastname')];
            }

            if (isset($userldap[$this->getParameter('ldapEmail')])) {
                $email = $userldap[$this->getParameter('ldapEmail')];
            }

            if (isset($userldap[$this->getParameter('ldapAvatar')])) {
                $avatar = $userldap[$this->getParameter('ldapAvatar')];
            }

            $user = $em->getRepository('App\Entity\User')->findOneBy(['username' => $username]);

            if (!$user) {
                if (!$this->getParameter('ldapAutosubmit')) {
                    return $this->redirect($this->generateUrl('app_noperm'));
                }
                $niveau01 = $em->getRepository('App\Entity\Niveau01')->calculateLDAPNiveau01($username);
                $user = $this->submituser($username, $firstname, $lastname, $email, $avatar, $niveau01, $em);
            } elseif ($this->getParameter('ldapAutoupdate')) {
                $this->updateuser($user, $firstname, $lastname, $email, $avatar, $em);
            }

            // Autoconnexion
            return $this->autoconnexion($user, $redirect, $request);
        }

        return $this->redirect($this->generateUrl('app_login'));
    }

    public function loginOPENID(Request $request, AuthenticationUtils $authenticationUtils, ManagerRegistry $em)
    {
        $state = Uuid::uuid4();
        $request->getSession()->set('oauthState', $state);
        $callback = $this->generateUrl('app_loginopenidcallback', [], UrlGeneratorInterface::ABSOLUTE_URL);
        $url = $this->getParameter('oauthLoginurl').'?client_id='.$this->getParameter('oauthClientid').'&redirect_uri='.$callback.'&response_type=code&state='.$state.'&scope=openid';

        return $this->redirect($url);
    }

    public function loginopenidcallback(Request $request, AuthenticationUtils $authenticationUtils, ManagerRegistry $em)
    {
        // Récupération de la cible de navigation
        $redirect = $request->getSession()->get('_security.main.target_path');

        // Masteridentity
        $appMasteridentity = $this->getParameter('appMasteridentity');

        $callback = $this->generateUrl('app_loginopenidcallback', [], UrlGeneratorInterface::ABSOLUTE_URL);
        $apiurl = $this->getParameter('oauthTokenurl');
        $query = [
            'grant_type' => 'authorization_code',
            'code' => $request->get('code'),
            'redirect_uri' => $callback,
            'client_id' => $this->getParameter('oauthClientid'),
            'client_secret' => $this->getParameter('oauthClientsecret'),
        ];
        $response = $this->apiservice->run('POST', $apiurl, $query, null, 'form');

        if (!$response || '200' != $response->code) {
            exit('pb openid 01');
        }
        $accesstoken = $response->body->access_token;
        $accesstokentype = $response->body->token_type;
        $îdtoken = $response->body->id_token;

        $request->getSession()->set('oauthAccesstoken', $accesstoken);
        $request->getSession()->set('oauthIdtoken', $îdtoken);

        $apiurl = $this->getParameter('oauthUserinfo');

        $response = $this->apiservice->run('GET', $apiurl, null, ['Authorization' => $accesstokentype.' '.$accesstoken]);
        if (!$response || '200' != $response->code) {
            exit('pb openid 02');
        }

        $attributes = json_decode(json_encode($response->body), true);

        // Username
        $username = '';
        if (isset($attributes[$this->getParameter('oauthUsername')])) {
            $username = $attributes[$this->getParameter('oauthUsername')];
        }

        // Valeur par défaut
        $email = "$username@nomail.fr";
        $lastname = $username;
        $firstname = ' ';
        $avatar = 'noavatar.png';

        // Récupérer les attributs associés
        if (isset($attributes[$this->getParameter('oauthEmail')])) {
            $email = $attributes[$this->getParameter('oauthEmail')];
        }

        if (isset($attributes[$this->getParameter('oauthLastname')])) {
            $lastname = $attributes[$this->getParameter('oauthLastname')];
        }

        if (isset($attributes[$this->getParameter('oauthFirstname')])) {
            $firstname = $attributes[$this->getParameter('oauthFirstname')];
        }

        if (isset($attributes[$this->getParameter('oauthAvatar')])) {
            $avatar = $attributes[$this->getParameter('oauthAvatar')];
        }

        // Rechercher l'utilisateur
        $user = $em->getRepository('App\Entity\User')->findOneBy(['username' => $username]);
        if (!$user) {
            if (!$this->getParameter('oauthAutosubmit')) {
                return $this->redirect($this->generateUrl('app_noperm'));
            }

            $this->submitSSONiveau01($attributes, $em);
            $this->submitSSOGroup($attributes, $em);
            $niveau01 = $em->getRepository('App\Entity\Niveau01')->calculateSSONiveau01($attributes);
            $user = $this->submituser($username, $firstname, $lastname, $email, $avatar, $niveau01, $em);
        } elseif ($this->getParameter('oauthAutoupdate')) {
            $this->submitSSONiveau01($attributes, $em);
            $this->submitSSOGroup($attributes, $em);
            $this->updateuser($user, $firstname, $lastname, $email, $avatar, $em);
            $user = $em->getRepository('App\Entity\Group')->calculateSSOGroup($user, $attributes);
        }

        // Autoconnexion
        return $this->autoconnexion($user, $redirect, $request);
    }

    public function logout(Request $request)
    {
        $auth_mode = $this->getParameter('appAuth');
        switch ($auth_mode) {
            case 'SQL':
                return $this->logoutSQL($request);
                break;

            case 'CAS':
                return $this->logoutCAS($request);
                break;

            case 'LDAP':
                return $this->logoutLDAP($request);
                break;

            case 'OPENID':
                return $this->logoutOPENID($request);
                break;
        }
    }

    public function logoutSQL(Request $request)
    {
        $this->tokenstorage->setToken(null);
        $request->getSession()->invalidate();

        return $this->redirect($this->generateUrl('app_home'));
    }

    public function logoutCAS(Request $request)
    {
        $this->tokenstorage->setToken(null);
        $request->getSession()->invalidate();

        // Init Client CAS
        $alias = $this->getParameter('appAlias');
        \phpCAS::setDebug($this->appKernel->getProjectDir().'/var/log/cas.log');
        \phpCAS::client(CAS_VERSION_2_0, $this->getParameter('casHost'), intval($this->getParameter('casPort')), is_null($this->getParameter('casPath')) ? '' : $this->getParameter('casPath'), false);
        \phpCAS::setNoCasServerValidation();

        // Logout
        $url = $this->generateUrl('app_home', [], UrlGeneratorInterface::ABSOLUTE_URL);
        \phpCAS::logout(['service' => $url]);

        return true;
    }

    public function logoutLDAP(Request $request)
    {
        $this->tokenstorage->setToken(null);
        $request->getSession()->invalidate();

        return $this->redirect($this->generateUrl('app_home'));
    }

    public function logoutOPENID(Request $request)
    {
        $accesstoken = $request->getSession()->get('oauthAccesstoken');
        $idtoken = $request->getSession()->get('oauthIdtoken');
        $state = $request->getSession()->get('oauthState');

        $this->tokenstorage->setToken(null);
        $request->getSession()->invalidate();

        $url = $this->getParameter('oauthLogouturl');
        if ($url) {
            $callback = ($request->isSecure() ? 'https://' : 'http://').str_replace('//', '/', $this->getParameter('appWeburl').$this->getParameter('appAlias').$this->generateUrl('app_home'));
            $callback = substr($callback, 0, -1);

            $url .= "?id_token_hint=$idtoken&scope=openid&post_logout_redirect_uri=$callback";

            return $this->redirect($url);
        } else {
            return $this->redirect($this->generateUrl('app_home'));
        }
    }

    // Génération automatique des niveau01 provenant de l'attribut casniveau01
    private function submitSSONiveau01($attributes, ManagerRegistry $em)
    {
        $attrNiveau01 = ('CAS' == $this->getParameter('appAuth') ? $this->getParameter('casNiveau01') : $this->getParameter('oauthNiveau01'));
        if (!$attrNiveau01) {
            return null;
        }

        // Si l'utilisateur possège l'attribut niveau01 dans ses attributs
        if (array_key_exists($attrNiveau01, $attributes)) {
            if (!is_array($attributes[$attrNiveau01])) {
                $attributes[$attrNiveau01] = [$attributes[$attrNiveau01]];
            }

            foreach ($attributes[$attrNiveau01] as $ssoniveau01) {
                $basedn = $this->getParameter('ldapBasedn');
                $name = $ssoniveau01;
                if ('' != $basedn) {
                    // Si présence du basedn dans le nom du groupe = nous sommes en présence d'un DN = on récupere donc comme nom que son cn
                    if (false !== stripos($name, $basedn)) {
                        $tbname = explode(',', $name);
                        $tbname = explode('=', $tbname[0]);
                        $name = $tbname[1];
                    }
                }

                // Recherche du groupe
                $niveau01 = $em->getRepository("App\Entity\Niveau01")->findOneBy(['label' => $name]);
                if (!$niveau01) {
                    $niveau01 = new Niveau01();
                    $niveau01->setLabel($name);
                    $niveau01->setApikey(Uuid::uuid4());
                }

                $niveau01->setAttributes('{"'.$attrNiveau01.'":"'.$ssoniveau01.'"}');
                $em->getManager()->persist($niveau01);
                $em->getManager()->flush();
            }
        }
    }

    // Génération automatique des groupes provenant de l'attribut casgroup ou oauthgroup
    private function submitSSOGroup($attributes, ManagerRegistry $em)
    {
        $attrGroup = ('CAS' == $this->getParameter('appAuth') ? $this->getParameter('casGroup') : $this->getParameter('oauthGroup'));
        if (!$attrGroup) {
            return null;
        }

        // Si l'utilisateur possège l'attribut groupe dans ses attributs
        if (array_key_exists($attrGroup, $attributes)) {
            if (!is_array($attributes[$attrGroup])) {
                $attributes[$attrGroup] = [$attributes[$attrGroup]];
            }

            foreach ($attributes[$attrGroup] as $ssogroup) {
                $basedn = $this->getParameter('ldapBasedn');
                $name = $ssogroup;
                if ('' != $basedn) {
                    // Si présence du basedn dans le nom du groupe = nous sommes en présence d'un DN = on récupere donc comme nom que son cn
                    if (false !== stripos($name, $basedn)) {
                        $tbname = explode(',', $name);
                        $tbname = explode('=', $tbname[0]);
                        $name = $tbname[1];
                    }
                }

                // Recherche du groupe
                $group = $em->getRepository("App\Entity\Group")->findOneBy(['label' => $name]);
                if (!$group) {
                    $group = new Group();
                    $group->setLabel($name);
                    $group->setIsopen(false);
                    $group->setIsworkgroup(false);
                    $group->setApikey(Uuid::uuid4());
                }

                $group->setAttributes('{"'.$attrGroup.'":"'.$ssogroup.'"}');
                $em->getManager()->persist($group);
                $em->getManager()->flush();
            }
        }
    }

    private function submituser($username, $firstname, $lastname, $email, $avatar, $niveau01, $em)
    {
        if (empty($email)) {
            $email = $username.'@nomail.com';
        }
        if (empty($avatar)) {
            $avatar = 'noavatar.png';
        }
        if (empty($firstname)) {
            $firstname = ' ';
        }
        if (empty($lastname)) {
            $lastname = $username;
        }
        $uuid = Uuid::uuid4();
        $password = $this->getParameter('appAuth').'PWD-'.$username.'-'.$uuid;

        // Si aucun niveau01 on prend par défaut le niveau system
        if (!$niveau01) {
            $niveau01 = $em->getRepository('App\Entity\Niveau01')->find(-1);
        }

        // Autogénération du user vu qu'il a pu se connecter
        $user = new User();

        $user->setUsername($username);
        $user->setEmail($email);
        $user->setLastname($lastname);
        $user->setFirstname($firstname);
        $user->setApikey(Uuid::uuid4());

        $user->setPassword($password);
        $user->setNiveau01($niveau01);

        $user->setAvatar($avatar);
        $user->setIsactive(true);
        $user->setIsvisible(true);
        $user->setRole('ROLE_USER');

        if (in_array($username, $this->getParameter('appAdmins'))) {
            $user->setRole('ROLE_ADMIN');
        }

        $em->getManager()->persist($user);
        $em->getManager()->flush();

        return $user;
    }

    private function updateuser($user, $firstname, $lastname, $email, $avatar, $em)
    {
        if ('noavatar.png' == $avatar) {
            $avatar = $user->getAvatar();
        }

        if (!empty($lastname)) {
            $user->setLastname($lastname);
        }
        if (!empty($firstname)) {
            $user->setFirstname($firstname);
        }
        if (!empty($email)) {
            $user->setEmail($email);
        }
        if (!empty($avatar)) {
            $user->setAvatar($avatar);
        }

        if (in_array($user->getUsername(), $this->getParameter('appAdmins'))) {
            $user->setRole('ROLE_ADMIN');
        }

        $em->getManager()->flush();
    }

    private function autoconnexion($user, $redirect, Request $request)
    {
        if (!$user->isIsactive()) {
            return $this->redirect($this->generateUrl('app_noperm'));
        }

        // Récupérer le token de l'utilisateur
        $token = new UsernamePasswordToken($user, 'main', $user->getRoles());
        $this->tokenstorage->setToken($token);
        $request->getSession()->set('_security_main', serialize($token));

        // Simuler l'evenement de connexion
        $event = new InteractiveLoginEvent($request, $token);
        $dispatcher = new EventDispatcher();
        $dispatcher->dispatch($event);

        // Redirection
        if ($redirect) {
            return $this->redirect($redirect);
        } else {
            return $this->redirect($this->generateUrl('app_home'));
        }
    }
}