<?php

declare(strict_types=1);
/**
 * Calendar App
 *
 * @copyright 2021 Anna Larch <anna.larch@gmx.net>
 *
 * @author Anna Larch <anna.larch@gmx.net>
 * @author Richard Steinmetz <richard@steinmetz.cloud>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace OCA\Gestion\Service;

use DateTime;
use OCA\Gestion\Constants\BddConstant;
use OCA\Gestion\Db\Bdd;
use OCA\Gestion\Db\TalkDb;
use Psr\Log\LoggerInterface;
use Ramsey\Uuid\Uuid;

class TalkService {

    /** @var TalkDb */
	private $talkDb;

	/** @var LoggerInterface */
	private $logger;

	public function __construct(
        TalkDb $talkDb,
		LoggerInterface $logger) {
		$this->logger = $logger;
        $this->talkDb = $talkDb;
	}

    private function getUserDevisTalkRoomNames($target ,$senderUser){
        $roomNamesCreatedBytargetUser = '["'.$target.'","'.$senderUser.'"]';
        $roomNamesCreatedBySenderUser = '["'.$senderUser.'","'.$target.'"]';
        return [
            "target" => $roomNamesCreatedBytargetUser,
            "sender" => $roomNamesCreatedBySenderUser
        ];
    }

    private function generateTalkRandomToken(){
        $length = 8;
        $characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
        $charactersLength = strlen($characters);
        $randomToken = '';
        for ($i = 0; $i < $length; $i++) {
            $randomToken .= $characters[rand(0, $charactersLength - 1)];
        }
        return $randomToken;
    }

    private function getNotificationsSubjectsParameters(string $senderUser){
        return '{"userType":"users","userId":"'.$senderUser.'"}';
    }

    private function getNotificationsMessageParameters($commentId){
        return '{"commentId":"'.$commentId.'"}';
    }

    

    public function sendDevisTalkNotifications(string $message,string $targetUser ,string $senderUser){
        $senderAndTargetIsTheSameUser = $targetUser == $senderUser;
        $senderUser = $senderAndTargetIsTheSameUser ? BddConstant::DEFAULT_ADMIN_ID_NEXTCLOUD : $senderUser;
        if( $targetUser === BddConstant::DEFAULT_ADMIN_ID_NEXTCLOUD && $senderUser === BddConstant::DEFAULT_ADMIN_ID_NEXTCLOUD){
            return;
        }
        $roomNames = $this->getUserDevisTalkRoomNames($targetUser , $senderUser);
        $room = $this->talkDb->getDevisTalkRoomByNames($roomNames);
        if($room == null){
            $roomToken = $this->generateTalkRandomToken();
            $room = $this->talkDb->createDevisTalkRoomAndReturnDevisTalkRoom($targetUser,$senderUser, $roomToken);
            $this->talkDb->setDevisTalkRoomInitialMessageAndReturnMessage($room['id'],$targetUser);
        }
        else{
            $roomToken = $room['token'];
        }
        $devisMessage = $this->talkDb->createDevisTalkRoomMessageAndReturnMessage($room['id'],$message,$senderUser);
        $this->talkDb->updateRoomLastMessage($room['id'],$devisMessage['id']);
        $this->talkDb->setAttendeeLastReadMessage($room['id'],$devisMessage['id'],$senderUser);
        //send notifications
        $notificationsSubjectsParameters = $this->getNotificationsSubjectsParameters($senderUser);
        $notificationsMessageParameters = $this->getNotificationsMessageParameters($devisMessage['id']);
        $this->talkDb->sendAttendeeNotifications($targetUser,$roomToken,$notificationsSubjectsParameters,$notificationsMessageParameters);
    }

    public function getRoomTokenBeetwenTwoUser( $senderUser  ,  $targetUser){
        $senderAndTargetIsTheSameUser = $targetUser == $senderUser;
        $senderUser = $senderAndTargetIsTheSameUser ? BddConstant::DEFAULT_ADMIN_ID_NEXTCLOUD : $senderUser;
        if( $targetUser === BddConstant::DEFAULT_ADMIN_ID_NEXTCLOUD && $senderUser === BddConstant::DEFAULT_ADMIN_ID_NEXTCLOUD){
            return null;
        }
        $roomNames = $this->getUserDevisTalkRoomNames($targetUser , $senderUser);
        $room = $this->talkDb->getDevisTalkRoomByNames($roomNames);
        if($room == null){
            $roomToken = $this->generateTalkRandomToken();
            $room = $this->talkDb->createDevisTalkRoomAndReturnDevisTalkRoom($targetUser,$senderUser, $roomToken);
            $this->talkDb->setDevisTalkRoomInitialMessageAndReturnMessage($room['id'],$targetUser);
        }
        else{
            $roomToken = $room['token'];
        }
        
        return $roomToken;
    }

}