<?php
namespace OCA\Agency\Agency;

use OCP\IRequest;
use OCP\IUserSession;
use OCP\IUserManager;
use OCP\IDBConnection;
use OCA\Agency\Db\AgencyMapper;
use OCA\Agency\Service\AgencyService;

use OCP\IGroupManager;

class AgencyManager {
    
    protected $agencyMapper;
    protected $groupManager;
    protected $userSession;
    protected $userManager;
    protected $db;

    public function __construct($AppName, IDBConnection $db, IRequest $request, AgencyMapper $agencyMapper, IGroupManager $groupManager, IUserSession $userSession, IUserManager $userManager) {
        $this->agencyMapper = $agencyMapper;
        $this->groupManager = $groupManager;
        $this->userSession = $userSession;
        $this->userManager = $userManager;
	}
    /**
     * Creates a new Agency and save it to the database.
     * 
     * @param:
     *  agencygid - GrouopID of the Agency
     *  agencydirid - ID for the Grouopfolder for AgencyData
     *  standarddirid - ID for the Groupfolder for all Uploaded Standardfiles
     */
    public function createAgencyOnReg(string $agencygid, int $agencydirid, int $standarddirid){
        $agencyService = new AgencyService($this->agencyMapper);
        return $agencyService->create($agencygid, $agencydirid, $standarddirid);
    }

    /**
     * getAgencyByUser
     *  
     *  Return the complete Agency-Data by filtering the id from default agency-group, ex: agency_1 -> 1 (int)
     *  
     */
    public function getAgencyByUser(){
        $groups = $this->groupManager->getUserGroups($this->userSession->getUser());
		$agency_group_id = "";
		foreach($groups as $group){
			if(str_contains($group->getGId(), 'agencymaingroupid_')){
				$agency_group_id_array = explode("_", strval($group->getGId()));
                $agency_group_id = $agency_group_id_array[0]."_".$agency_group_id_array[1];
			}
		}
        return $this->agencyMapper->getAgencyByGId($agency_group_id);
        #return $agency_group_id;
    }
    /**
     * Return only the AgencyGroupId
     */
    public function getAgencyGIdByUser(){
        $groups = $this->groupManager->getUserGroups($this->userSession->getUser());
		$agency_group_id = "";
		foreach($groups as $group){
			if(str_contains($group->getGId(), 'agencymaingroupid_')){
				$agency_group_id_array = explode("_", strval($group->getGId()));
                $agency_group_id = $agency_group_id_array[0]."_".$agency_group_id_array[1];
			}
		}
        return $agency_group_id;
    }

    // Return an random Id-Ele for generating single IDs
    public function generateRandomId($length = 6) {
		$characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
		$charactersLength = strlen($characters);
		$randomString = '';
		for ($i = 0; $i < $length; $i++) {
			$randomString .= $characters[rand(0, $charactersLength - 1)];
		}
		return $randomString;
	}

    /**
     *  Returns all users of an Agency by filtering the Main Agency Group Id out
     * 
     * Returns an Array of IUser-Objects. Filtering is by logged User
     */
    public function getagencycontributors(){
        $group = $this->groupManager->get($this->getAgencyGIdByUser());
        $users = $group->getUsers();

        $return_users = array();
        // Creating a nice User-JSON-Array
        foreach($users as $user){
            // TODO: Hier muss noch sichergestellt werden, dass der aktuelle Nutzer, wenn er in der Admingruppe ist, sich selbst nicht entfernen kann
            array_push($return_users, array("user" => $user->getUID(), "displayName" => $user->getDisplayName()));
		}
        return $return_users;
    }

    # TODO: Hier prüfen, ob alle User in der gleichen Agentur sind und er eingeloggte User auch wirklich das Recht dazu hat
    // TODO: Hier noch sicherstellen, dass der aktuell eingeloggte User sich nicht selbst aus der Admingruppe werfen darf!
    public function updateagencygroupcontributors(string $gid, array $users){
        // Getting the Group
        $groupToChange = $this->groupManager->get($gid); 
        
        // Getting the Users in Group
        $usersInGroup = $groupToChange->getUsers();

        // Preparing new Users, creating Array of Users
        $newUsersInGroup = array();
        foreach($users as $user) {
            $tempuser = $this->userManager->get($user);
            array_push($newUsersInGroup, $tempuser);
        }

        // Removing not existing users
        foreach($usersInGroup as $user) {
            if($groupToChange->inGroup($user) == true && in_array($newUsersInGroup, $user) == false) {
                $groupToChange->removeUser($user);
            }
        }

        // Adding new Users
        foreach($newUsersInGroup as $user) {
            if($groupToChange->inGroup($user) == false) {
                $groupToChange->addUser($user);
            }
        }

        return $users;
    }

}