/* Copyright 2014 Open Ag Data Alliance
 *
 * 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.
 */
'use strict';

var _ = require('lodash');

var singleton = null;

module.exports = function(config) {
  if(singleton) return singleton;

  var tokensDriver = config.libs.db.tokens();
  var log = config.libs.log().child({module: 'auth/tokens'});

  var _Tokens = {
    findByToken: function(token, cb) {
      log.debug('findByToken: looking for token ', token);
      return tokensDriver
        .get(token)
        .nodeify(cb);
    },

    save: function(token, cb) {
      var t = _.cloneDeep(token);
      t.user = {_id: token.user.username}; // this is actually the id in the users database, which is the username
      return tokensDriver
        .set(t.token, t)
        .then(function() {
          log.debug('save: saved token = ', t);
          return tokensDriver
            .get(t.token);
        })
        .nodeify(cb);
    },

  };

  singleton = _Tokens;
  return singleton;
};
