<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Http\Event\InteractiveLoginEvent;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Symfony\Component\HttpKernel\KernelInterface;
use Doctrine\Persistence\ManagerRegistry;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
use Ramsey\Uuid\Uuid;

use App\Entity\User;
use App\Entity\Niveau01;
use App\Entity\Group;
use App\Form\LoginType;
use App\Service\LdapService;
use App\Service\ApiService;

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', array(
            '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 = $em->getRepository('App\Entity\User')->findOneBy(array("username"=>$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")) {
            $this->submitSSONiveau01($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 = $em->getRepository('App\Entity\User')->findOneBy(array("username"=>$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', array(), 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', array(), 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(!$response||$response->code!="200") die("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||$response->code!="200") die("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 = $em->getRepository('App\Entity\User')->findOneBy(array("username"=>$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', array(), UrlGeneratorInterface::ABSOLUTE_URL);
        \phpCAS::logout(array("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) {
        $attrNiveau01=($this->getParameter("appAuth")=="CAS"?$this->getParameter('casNiveau01'):$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($basedn!="") {
                    // Si présence du basedn dans le nom du groupe = nous sommes en présence d'un DN = on récupere donc comme nom que son cn
                    if(stripos($name,$basedn)!==false) {
                        $tbname=explode(",",$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) {
        $attrGroup=($this->getParameter("appAuth")=="CAS"?$this->getParameter('casGroup'):$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($basedn!="") {
                    // Si présence du basedn dans le nom du groupe = nous sommes en présence d'un DN = on récupere donc comme nom que son cn
                    if(stripos($name,$basedn)!==false) {
                        $tbname=explode(",",$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->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($avatar=="noavatar.png") $avatar=$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) 
    {
        // 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'));
    }
}