<?php

namespace OCA\Agency\AppInfo;

use OCP\User\Events\UserChangedEvent;
use OCP\User\Events\BeforeUserLoggedOutEvent;
use OCP\EventDispatcher\IEventDispatcher;
use OCP\AppFramework\App;
use OCP\IUserSession;
use OCP\AppFramework\Controller;
use OCP\IRequest;

use OCP\User\Events\PostLoginEvent;

use OCP\AppFramework\Http\Events\BeforeTemplateRenderedEvent;

use OCP\Files\Events\Node\BeforeNodeDeletedEvent;


class Application extends App {

    protected $AppName = 'Agency';
    
    public function __construct() {
        parent::__construct($this->AppName);
        
        $dispatcher = $this->getContainer()->query(IEventDispatcher::class);
        
        # Adding the Pre-Logout-Event for logging a User out of Django when user is atempt to logout from the cloud
        $dispatcher->addServiceListener(BeforeUserLoggedOutEvent::class, LogoutByNC::class);

        # Adding the Event, that User has Changed - update the logged User by Django. Works only by personal informations of the User!
        $dispatcher->addServiceListener(UserChangedEvent::class, UserChangedByNC::class);
        
        # Checking, if a user logged in in Django and which user is logged in in Django.
        $dispatcher->addServiceListener(BeforeTemplateRenderedEvent::class, LoginByNC::class);

        # Event before a File is deletet
        $dispatcher->addServiceListener(BeforeNodeDeletedEvent::class, DeleteNCFileDjango::class);
    }
}

/*
    A File is ready to be deleted in NC, before that happens delete the File in Django and remove it from addedfiles_nc in standards
*/

class DeleteNCFileDjango extends Controller {

    protected $session;
    private $nclink = 'https://daprd1.digitale-agentur.com';
    //private $nclink = 'http://host.docker.internal:8000';

    public function __construct(string $AppName, IRequest $request, IUserSession $session) {
        parent::__construct($AppName, $request);
        $this->session = $session;
    }

    public function handle(BeforeNodeDeletedEvent $event): void {
        $opts = [
            "http" => array(
                "method" => "GET",
                "header" => ""
            ),
            "ssl"=> array(
                "verify_peer"=>false,
                "verify_peer_name"=>false,
            ),
        ];
        $context = stream_context_create($opts);

        $file = file_get_contents($this->nclink.'/api/deletefile/'.$event->getNode()->getId().'/87zuhjk87GHJ546tzgvhas76aaskbdhr45edfVHAKia87s6gbAVGFGSR3451627gBHAKJBN', false, $context);
    }
}

/*
    User logged in, save Session-ID and login the User in Django
*/
class LoginByNC extends Controller {

    protected $session;
    protected $request;
    private $nclink = 'https://daprd1.digitale-agentur.com';
    //private $nclink = 'http://host.docker.internal:8000';

    public function __construct(string $AppName, IRequest $request, IUserSession $session) {
        $this->request = $request;
        parent::__construct($AppName, $request);
        $this->session = $session;
    }

    private function generateRandomString($length = 10) {
        $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $charactersLength = strlen($characters);
        $randomString = '';
        for ($i = 0; $i < $length; $i++) {
            $randomString .= $characters[rand(0, $charactersLength - 1)];
        }
        return $randomString;
    }

    # Trigger in Django that the User changed
    public function handle(BeforeTemplateRenderedEvent $event): void {
        $postdata = http_build_query(
            array(
                'uid' => $this->request->getCookie('nc_username'),
                'sid' => $this->request->getCookie('nc_session_id')
            )
        );

        $opts = [
            "ssl"=> array(
                "verify_peer"=>false,
                "verify_peer_name"=>false,
            ),
            "http" => array(
                "method" => "POST",
                "header" => "",
                "content" => $postdata
            )
        ];
        $context = stream_context_create($opts);
        $file = file_get_contents($this->nclink.'/api/setlog/', false, $context);
    }
}

/*
    CHANGED USER IN  DJANGO BY NC
*/
class UserChangedByNC extends Controller {

    protected $session;
    protected $request;
    private $nclink = 'https://daprd1.digitale-agentur.com';
    //private $nclink = 'http://host.docker.internal:8000';

    public function __construct(string $AppName, IRequest $request, IUserSession $session) {
        $this->request = $request;
        parent::__construct($AppName, $request);
        $this->session = $session;
    }
    # Trigger in Django that the User changed
    public function handle(UserChangedEvent $event): void {
        $opts = [
            "http" => array(
                "method" => "GET",
                "header" => ""
            ),
            "ssl"=> array(
                "verify_peer"=>false,
                "verify_peer_name"=>false,
            ),
        ];
        if($this->session->getUser() != null){
            $context = stream_context_create($opts);
            $file = file_get_contents($this->nclink.'/api/uschanged/'.$this->session->getUser()->getUID().'/'.$this->request->getCookie('nc_session_id'), false, $context);
        }
    }
}

/*
    LOGOUT DJANGO BY NC
    Diese Klasse wird erzeugt, wenn das Evenet BeforeUserLoggedOutEvent getriggert wird. Dann wird
    der User über die Django-API ausgeloggt!
*/
class LogoutByNC extends Controller {

    protected $session;
    private $nclink = 'https://daprd1.digitale-agentur.com';
    //private $nclink = 'http://host.docker.internal:8000';

    public function __construct(string $AppName, IRequest $request, IUserSession $session) {
        parent::__construct($AppName, $request);
        $this->session = $session;
    }

    # Logout the user!
    public function handle(BeforeUserLoggedOutEvent $event): void {
        $opts = [
            "http" => array(
                "method" => "GET",
                "header" => ""
            ),
            "ssl"=> array(
                "verify_peer"=>false,
                "verify_peer_name"=>false,
            ),
        ];
        $context = stream_context_create($opts);
        $file = file_get_contents($this->nclink.'/api/logout/'.$this->session->getUser()->getUID(), false, $context);
    }
}