/*
 * Copyright 2020 FUJITSU LIMITED
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

import Boom from 'boom';

import {
  SESSION_USER_KEY,
  SESSION_TOKEN_CHANGED,
  TOKEN_CHANGED_VALUE,
  RELOAD_MARKUP
} from '../../const';

export default (server) => {
  return async (request, reply) => {

    let session = request.yar;
    let userObj = session.get(SESSION_USER_KEY);
    let tokenChanged = session.get(SESSION_TOKEN_CHANGED);

    if (tokenChanged === TOKEN_CHANGED_VALUE) {
      //TODO: This part doesn't really have any effect now because Kibana won't allow HTML injection
      server.log(['status', 'info', 'keystone'], 'Detected that token has been changed, replaying the request');
      session.clear(SESSION_TOKEN_CHANGED);
      return reply.response(RELOAD_MARKUP).type('text/html');
    } else if (userObj) {
      let expiresAt = new Date(userObj.expires_at).valueOf();
      let now = new Date().valueOf();
      let diff = now - expiresAt;

      if (diff >= 0) {
        session.reset();
        return reply(Boom.unauthorized('User token has expired'));
      } else {
        request.yar.set({
          credentials: userObj,
          log: {
            tags: 'keystone ok'
          }
        });
        return reply.continue;
      }
    }

    // TODO(trebskit) should actually throw error here I guess
    return reply.continue;
  };
};