<?php

namespace OCA\UPschooling\Service;

use Aryess\PhpMatrixSdk\Room;
use OCA\UPschooling\Db\ChatMapper;
use OCA\UPschooling\Db\MatrixChat;
use OCA\UPschooling\Db\MatrixTicket;
use OCA\UPschooling\Db\TicketMapper;
use OCA\UPschooling\Exceptions\RoomNotFoundException;
use OCP\AppFramework\Db\DoesNotExistException;
use Psr\Log\LoggerInterface;

class ChatService
{

	/** @var ChatMapper */
	private $chatMapper;

	/** @var MatrixService */
	private $matrixService;

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

	public function __construct(ChatMapper $chatMapper, MatrixService $matrixService, LoggerInterface $logger)
	{
		$this->chatMapper = $chatMapper;
		$this->matrixService = $matrixService;
		$this->logger = $logger;
	}

	/**
	 * @param $ticket MatrixTicket Support ticket
	 * @throws RoomNotFoundException
	 */
	public function getOrCreateChatRoom(MatrixTicket $ticket): MatrixChat
	{
		try {
			return $this->chatMapper->findCurrent($ticket->getId());
		} catch (DoesNotExistException $e) {
			if ($ticket->getMatrixHelperUser() == null) {
				$this->logger->debug("No helper assigned to ticket " . $ticket->getId() . ". Not creating chat room");
				throw new RoomNotFoundException();
			}
			$this->logger->debug("Chat room for ticket " . $ticket->getId() . " does not exist. Creating room..");
			$roomId = $this->matrixService->createRoom();
			$startDate = new \DateTime('now', new \DateTimeZone("utc"));
			$matrixChat = new MatrixChat();
			$matrixChat->setTicketId($ticket->getId());
			$matrixChat->setMatrixRoomId($roomId);
			$matrixChat->setMatrixHelperUser($ticket->getMatrixHelperUser());
			$matrixChat->setDateStart($this->chatMapper->convertDateTimeTz($startDate));
			$matrixChat->setVersion(1);

			$this->matrixService->inviteUser($roomId, $ticket->getMatrixHelperUser());
			$this->matrixService->inviteUser($roomId, $ticket->getMatrixAssistedUser());

			return $this->chatMapper->insert($matrixChat);
		}
	}
}