import { Meteor } from 'meteor/meteor';
import { check } from 'meteor/check';
import RedisPubSub from '/imports/startup/server/redis';
import Logger from '/imports/startup/server/logger';
import Users from '/imports/api/users';
import { extractCredentials } from '/imports/api/common/server/helpers';

export default async function assignPresenter(userId) { // TODO-- send username from client side
  try {
    const REDIS_CONFIG = Meteor.settings.private.redis;
    const CHANNEL = REDIS_CONFIG.channels.toAkkaApps;
    const EVENT_NAME = 'AssignPresenterReqMsg';
    const { meetingId, requesterUserId } = extractCredentials(this.userId);

    check(meetingId, String);
    check(requesterUserId, String);
    check(userId, String);

    const User = await Users.findOneAsync({
      meetingId,
      userId,
    });

    if (!User) {
      throw new Meteor.Error('user-not-found', 'You need a valid user to be able to set presenter');
    }

    const payload = {
      newPresenterId: userId,
      newPresenterName: User.name,
      assignedBy: requesterUserId,
      requesterId: requesterUserId,
    };

    Logger.verbose('User set as presenter', { userId, meetingId, setBy: requesterUserId });

    RedisPubSub.publishUserMessage(CHANNEL, EVENT_NAME, meetingId, requesterUserId, payload);
  } catch (err) {
    Logger.error(`Exception while invoking method assignPresenter ${err.stack}`);
  }
}