import { check } from 'meteor/check';
import Users from '/imports/api/users';
import UsersPersistentData from '/imports/api/users-persistent-data';
import VideoStreams from '/imports/api/video-streams';
import Logger from '/imports/startup/server/logger';
import setloggedOutStatus from '/imports/api/users-persistent-data/server/modifiers/setloggedOutStatus';
import clearUserInfoForRequester from '/imports/api/users-infos/server/modifiers/clearUserInfoForRequester';
import ClientConnections from '/imports/startup/server/ClientConnections';

const clearAllSessions = (sessionUserId) => {
  const serverSessions = Meteor.server.sessions;
  const interable = serverSessions.values();

  for (const session of interable) {
    if (session.userId === sessionUserId) {
      session.close();
    }
  }
};

export default function removeUser(meetingId, userId) {
  check(meetingId, String);
  check(userId, String);

  try {
    if (!process.env.BBB_HTML5_ROLE || process.env.BBB_HTML5_ROLE === 'frontend') {
      const sessionUserId = `${meetingId}--${userId}`;
      ClientConnections.removeClientConnection(sessionUserId);
      clearAllSessions(sessionUserId);

      // we don't want to fully process the redis message in frontend
      // since the backend is supposed to update Mongo
      if (process.env.BBB_HTML5_ROLE === 'frontend') {
        return;
      }
    }

    const selector = {
      meetingId,
      userId,
    };

    setloggedOutStatus(userId, meetingId, true);
    VideoStreams.remove({ meetingId, userId });

    clearUserInfoForRequester(meetingId, userId);

    const currentUser = Users.findOne({ userId, meetingId });
    const hasMessages = currentUser?.hasMessages;

    if (!hasMessages) {
      UsersPersistentData.remove(selector);
    }
    Users.remove(selector);

    Logger.info(`Removed user id=${userId} meeting=${meetingId}`);
  } catch (err) {
    Logger.error(`Removing user from Users collection: ${err}`);
  }
}