/**
    * This file Copyright (c) 2013-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.rest.registry;
  
  import static java.util.Collections.emptyList;
  
  import info.magnolia.config.registry.DefinitionMetadata;
  import info.magnolia.config.registry.DefinitionMetadataBuilder;
  import info.magnolia.config.registry.DefinitionProvider;
  import info.magnolia.config.registry.DefinitionRawView;
  import info.magnolia.config.registry.Registry;
  import info.magnolia.config.registry.decoration.DefinitionDecorator;
  import info.magnolia.event.Event;
  import info.magnolia.rest.EndpointDefinition;
  
  import java.util.List;
  
  /**
   * Event fired by {@link EndpointDefinitionRegistry} when endpoint definitions are added, removed or changed.
   *
   * @see EndpointDefinitionRegistryEventHandler
   * @see EndpointDefinitionRegistry
   */
  public class EndpointDefinitionRegistryEvent implements Event<EndpointDefinitionRegistryEventHandler> {
  
      private final EndpointDefinitionRegistryEventType type;
      private final DefinitionProvider<EndpointDefinition> endpointDefinitionProvider;
  
      public EndpointDefinitionRegistryEvent(EndpointDefinitionRegistryEventType type, DefinitionProvider<EndpointDefinition> endpointDefinitionProvider) {
          this.type = type;
          this.endpointDefinitionProvider = endpointDefinitionProvider;
      }
  
      public EndpointDefinitionRegistryEvent(EndpointDefinitionRegistryEventType type, String endpointName) {
          this.type = type;
          this.endpointDefinitionProvider = new FixedDefinitionProvider(endpointName);
      }
  
      /**
       * @deprecated since 2.0, use {@link #EndpointDefinitionRegistryEvent(EndpointDefinitionRegistryEventType, DefinitionProvider)}
       */
      @Deprecated
      public EndpointDefinitionRegistryEvent(EndpointDefinitionRegistryEventType type, EndpointDefinition endpointDefinition) {
          this.type = type;
          this.endpointDefinitionProvider = new FixedDefinitionProvider(endpointDefinition);
      }
  
      public EndpointDefinitionRegistryEventType getType() {
          return type;
      }
  
      public String getEndpointName() {
          return endpointDefinitionProvider.getMetadata().getReferenceId();
      }
  
      public DefinitionProvider<EndpointDefinition> getEndpointDefinitionProvider() {
          return endpointDefinitionProvider;
      }
  
      /**
       * @deprecated since 2.0, use {@link #getEndpointDefinitionProvider()}
       */
      @Deprecated
      public EndpointDefinition getEndpointDefinition() {
          return endpointDefinitionProvider.get();
      }
  
      @Override
     public void dispatch(EndpointDefinitionRegistryEventHandler handler) {
         switch(type) {
         case REGISTERED:
             handler.onEndpointRegistered(this);
             break;
         case REREGISTERED:
             handler.onEndpointReregistered(this);
             break;
         case UNREGISTERED:
             handler.onEndpointUnregistered(this);
             break;
         }
     }
 
     /**
      * Compatibility definition provider, should events be fired with explicit definition or name.
      */
     private static class FixedDefinitionProvider implements DefinitionProvider<EndpointDefinition> {
         private final DefinitionMetadata metadata;
         private final EndpointDefinition endpointDefinition;
 
         public FixedDefinitionProvider(EndpointDefinition endpointDefinition) {
             this.endpointDefinition = endpointDefinition;
             this.metadata = DefinitionMetadataBuilder.usingNameAsId()
                     .name(endpointDefinition.getName())
                     .build();
         }
 
         public FixedDefinitionProvider(String endpointName) {
             this.endpointDefinition = null;
             this.metadata = DefinitionMetadataBuilder.usingNameAsId()
                     .name(endpointName)
                     .build();
         }
 
         @Override
         public List<DefinitionDecorator<EndpointDefinition>> getDecorators() {
             return emptyList();
         }
 
         @Override
         public DefinitionMetadata getMetadata() {
             return metadata;
         }
 
         @Override
         public EndpointDefinition get() throws Registry.InvalidDefinitionException {
             return endpointDefinition;
         }
 
         @Override
         public DefinitionRawView getRaw() {
             return null;
         }
 
         @Override
         public boolean isValid() {
             return endpointDefinition != null;
         }
 
         @Override
         public long getLastModified() {
             return 0;
         }
     }
 }