/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

var App = require('app');
module.exports = {
  mappers: Em.Mixin.create({
    metricMapperWithTransform: function (json, metricName, transformValueFunction) {
      var hostToValueMap = {};
      //var metricName = this.get('defaultMetric');
      if (json.host_components) {
        var props = metricName.split('.');
        //var transformValueFunction = this.get('transformValue');
        json.host_components.forEach(function (hc) {
          var value = hc;
          props.forEach(function (prop) {
            if (value != null && prop in value) {
              value = value[prop];
            } else {
              value = null;
            }
          });
          if (value != null) {
            if (transformValueFunction) {
              value = transformValueFunction(value);
            }
            var hostName = hc.HostRoles.host_name;
            hostToValueMap[hostName] = value;
          }
        });
      }
      return hostToValueMap;
    }
  })
};