/*
    * Copyright (c) 2015 Maxim Yunusov
    *    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.
   */
  
  package org.maxur.perfmodel.backend;
  
  import org.glassfish.hk2.api.Factory;
  import org.glassfish.hk2.api.ServiceLocator;
  import org.jvnet.hk2.annotations.Service;
  import org.maxur.perfmodel.backend.service.impl.CliApplication;
  import org.maxur.perfmodel.backend.service.impl.TrayIconApplication;
  import org.maxur.perfmodel.backend.service.Application;
  import org.slf4j.Logger;
  
  import javax.inject.Inject;
  
  import static org.slf4j.LoggerFactory.getLogger;
  
  /**
   * @author myunusov
   * @version 1.0
   * @since <pre>01.09.2015</pre>
   */
  @Service
  public class ApplicationProvider implements Factory<Application> {
  
      private static final Logger LOGGER = getLogger(ApplicationProvider.class);
  
      private Application application;
  
      @Inject
      private ServiceLocator locator;
  
      @Override
      public Application provide() {
          if (application == null) {
              application = make();
              locator.inject(application);
          }
          return application;
      }
  
      private Application make() {
          final Application result = new TrayIconApplication();
          if (result.isApplicable()) {
              return result;
          } else {
              LOGGER.info("SystemTray is not supported");
          }
          return new CliApplication();
      }
  
      @Override
      public void dispose(Application instance) {
          instance.stop();
      }
  }