<?php

namespace OCA\UPschooling\Service;

use Aryess\PhpMatrixSdk\Exceptions\MatrixException;
use Aryess\PhpMatrixSdk\Exceptions\MatrixHttpLibException;
use Aryess\PhpMatrixSdk\Exceptions\MatrixRequestException;
use Aryess\PhpMatrixSdk\Exceptions\ValidationException;
use Aryess\PhpMatrixSdk\MatrixClient;
use OCA\UPschooling\Exceptions\RoomNotFoundException;
use Psr\Log\LoggerInterface;

/**
 * This service will be used by the matrix listener background job to execute events and handle incoming 'matrix requests'
 */
class MatrixListenerService {

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

	/** @var MatrixClient */
	private $client;

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

	/** @var token */
	private $token;

	/** @var string */
	private $registrationSecret = "oyYh_iEJ7Aim.iB+ye.Xk;Gl3iHFab5*8K,zv~IulT85P=c-38";

	/**
	 * @param LoggerInterface $logger
	 * @param MatrixService $matrixService
	 * @throws MatrixException
	 * @throws MatrixHttpLibException
	 * @throws MatrixRequestException
	 * @throws ValidationException
	 */
	public function __construct(LoggerInterface $logger, MatrixService $matrixService) {
		$this->logger = $logger;
		$this->matrixService = $matrixService;

		$serverUrl = "http://synapse:8008";
		$user = "upschooling";

		$this->client = new MatrixClient($serverUrl);
		//TODO: Replace hard coded pw
		$this->token = $this->client->login($user, "secret", true);
		$this->logger->debug("Logged in as " . $user . " on server " . $serverUrl);

	}

	/**
	 * listens on all sorts of incoming matrix requests
	 *
	 * @return void
	 * @throws MatrixException
	 * @throws MatrixHttpLibException
	 * @throws MatrixRequestException
	 * @throws RoomNotFoundException
	 */
	public function listen() {
		$syncResponse = $this->client->api()->sync();
		$nextBatch = $syncResponse['next_batch'];
		foreach (array_get($syncResponse, 'rooms.invite', []) as $roomId => $inviteRoom) {
			$this->handleInvite($roomId);
		}

		$rooms = $this->client->getRooms();

		foreach ($rooms as $roomId => $room) {
			$messages = $this->client->api()->getRoomMessages($roomId, $nextBatch, "b", 100)["chunk"];
			foreach ($messages as $message) {
				if ($message["type"] == "m.room.message" && $message["content"]["msgtype"] == "m.text")
					var_dump($message["content"]["body"]);
			}
		}
	}

	/**
	 * TBD: Check if the user on the other side is actually allowed to talk to this matrix instance
	 * @return void
	 */
	private function auth() {

	}

	/**
	 * Given invitation object it'll enter the room
	 *
	 * @param int $roomId the roomID
	 * @return void
	 * @throws MatrixException|RoomNotFoundException
	 */
	private function handleInvite(int $roomId) {
		try {
			$this->client->joinRoom($roomId);
			$this->client->api()->sendMessageEvent($roomId, "upschooling.matrix.accepted", []);
		} catch (\Exception $e) {
			$this->logger->info("Join for room: " . $roomId . " failed.");
		}
		$this->matrixService->setProperty($roomId, "upschooling.s2s", ["approved" => true]);
		$this->logger->debug("joined " . $roomId);
	}
}