<?php
declare(strict_types=1);

namespace OCA\Agency\Controller;

use Exception;

use OCP\IRequest;
use OCP\IGroupManager;
use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Controller;

use OCA\Agency\Service\GroupService;
use OCA\Agency\Service\GroupPermissionService;
use OCA\Agency\Agency\AgencyManager;


class GroupController extends Controller {

    private $service;
    private $Id;
    
    protected $agencymanager;
    protected $userSession;
    protected $groupManager;
    protected $grouppermissionservice;
    use Errors;

    public function __construct(string $AppName, IRequest $request,
    GroupService $service, GroupPermissionService $grouppermissionservice, AgencyManager $agencymanager, IGroupManager $groupManager){
        parent::__construct($AppName, $request);
        $this->service = $service;
        $this->agencymanager = $agencymanager;
        $this->groupManager = $groupManager;
        $this->grouppermissionservice = $grouppermissionservice;
    }

    /**
     * @NoAdminRequired
     *
     * Returns all Groups of an Agency, incl. all Data (DisplayName, GId)
     * 
     * TODO: Checken, ob der aktuelle Nutzer das auch darf!
     * TODO: Hier auch die Permissions später laden, damit das nicht nochmal requested werden muss.
     * 
     */
    public function getagencygroups(){
        $searchGroupId = $this->agencymanager->getAgencyByUser()->getAgencygid();
        $groups = $this->groupManager->search($searchGroupId);
        $response_groups = array();
        foreach ($groups as $group) {
            // Checking, if group is default or not. Default Groups cant delete and cant rename by logged user!
            $isDefault = true;
            if(str_contains($group->getGId(), 'subgroup')){
                $isDefault = false;
            }
            // Adding current Users to the Group
            $user_groups = [];
            foreach($group->getUsers() as $groupuser){
                array_push($user_groups, array("user" => $groupuser->getUID(), "displayName" => $groupuser->getDisplayName()));
            }
            array_push($response_groups, array('name' => $group->getDisplayName(), 'gid' => $group->getGid(), 'isDefault' => $isDefault, 'users' => $user_groups));
        }
        //Sorting the Array A-Z by GroupDisplayName
        $keys = array_column($response_groups, 'name');
        array_multisort($keys, SORT_ASC, $response_groups);
        return $response_groups;
    }

    /**
     * 
     * Creates a new Group by GroupName
     * 
     * Not possible are groupnames which are used to seperate the agencys
     *
     * 
     * @NoAdminRequired
     *
     */
    #TODO: Check, if logged user has rights to do that!
    public function addagencygroup(string $groupname){
        if($groupname == "agencymaingroupid" or preg_match('~[0-9]{6}+~', $groupname) == 1){
            return false;
        }
        else {
            $searchGroupId = $this->agencymanager->getAgencyByUser()->getAgencygid();
            $newGroupId = $searchGroupId.'_subgroup_'.$this->agencymanager->generateRandomId();
            while($this->groupManager->groupExists($newGroupId) == true){
                $newGroupId = $searchGroupId.'_subgroup_'.$this->agencymanager->generateRandomId();
            }

            $newGroup = $this->groupManager->createGroup($newGroupId);
            $newGroup->setDisplayName($groupname);
            //Create the grouppermission-element
            $this->grouppermissionservice->create($newGroupId);
            return true;
        }
    }

    /**
     * delagencygroup
     * 
     * Delete an AgencyGroup
     * 
     * 
     * @NoAdminRequired
     */
    public function delagencygroup(string $id){
        # Getting the Group
        $todel = $this->groupManager->get($id);

        # Check, that the logged user is in the same Agency!
        $searchGroupId = $this->agencymanager->getAgencyByUser()->getAgencygid();

        $result = false;
        # If user is in the same Agency, then delete is possible - check permissions!
        # TODO: Hier noch einbauen, dass die Rechte geprüft werden!
        if(str_contains($todel->getGID(), $searchGroupId)) {
            $this->grouppermissionservice->remove($todel->getGID());
            $todel->delete();
        }
        return $result;
    }
}