package org.apache.archiva.repository;
   
   /*
    * 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.
   */
  
  import org.apache.archiva.configuration.ArchivaConfiguration;
  import org.apache.archiva.configuration.ConfigurationNames;
  import org.apache.archiva.components.registry.Registry;
  import org.apache.archiva.components.registry.RegistryListener;
  import org.springframework.context.ApplicationContext;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.PostConstruct;
  import javax.inject.Inject;
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   * RepositoryContentRequest
   */
  @Service( "repositoryContentFactory#default" )
  public class RepositoryContentFactory
      implements RegistryListener
  {
      /**
       *
       */
      @Inject
      private ArchivaConfiguration archivaConfiguration;
  
      @Inject
      private ApplicationContext applicationContext;
  
      @Inject
      private List<RepositoryContentProvider> repositoryContentProviders;
  
      private final Map<String, ManagedRepositoryContent> managedContentMap;
  
      private final Map<String, RemoteRepositoryContent> remoteContentMap;
  
  
      public RepositoryContentFactory( )
      {
          managedContentMap = new ConcurrentHashMap<String, ManagedRepositoryContent>( );
          remoteContentMap = new ConcurrentHashMap<String, RemoteRepositoryContent>( );
      }
  
      /**
       * Get the ManagedRepositoryContent object for the repository Id specified.
       *
       * @param repoId the repository id to fetch.
       * @return the ManagedRepositoryContent object associated with the repository id.
       * @throws RepositoryNotFoundException if the repository id does not exist within the configuration.
       * @throws RepositoryException         the repository content object cannot be loaded due to configuration issue.
       */
      public ManagedRepositoryContent getManagedRepositoryContent( String repoId )
          throws RepositoryException
      {
          ManagedRepositoryContent repo = managedContentMap.get( repoId );
  
          if ( repo != null )
          {
              return repo;
          }
          else
          {
              throw new RepositoryNotFoundException(
                  "Unable to find managed repository configuration for id " + repoId );
          }
  
      }
  
      private RepositoryContentProvider getProvider(final String layout, final RepositoryType repoType) throws RepositoryException
      {
          return repositoryContentProviders.stream().filter(p->p.supports( repoType ) && p.supportsLayout( layout )).
              findFirst().orElseThrow( ( ) -> new RepositoryException( "Could not find content provider for repository type "+repoType+" and layout "+layout ) );
      }
  
      public ManagedRepositoryContent getManagedRepositoryContent( org.apache.archiva.repository.ManagedRepository mRepo )
          throws RepositoryException
      {
          final String id = mRepo.getId();
         ManagedRepositoryContent content = managedContentMap.get( id );
 
         if ( content != null && content.getRepository()==mRepo)
         {
             return content;
         }
 
         RepositoryContentProvider contentProvider = getProvider( mRepo.getLayout( ), mRepo.getType( ) );
         content = contentProvider.createManagedContent( mRepo );
         if (content==null) {
             throw new RepositoryException( "Could not create repository content instance for "+mRepo.getId() );
         }
         ManagedRepositoryContent previousContent = managedContentMap.put( id, content );
         if (previousContent!=null) {
             previousContent.setRepository( null );
         }
 
         return content;
     }
 
     public RemoteRepositoryContent getRemoteRepositoryContent( String repoId )
         throws RepositoryException
     {
         RemoteRepositoryContent repo = remoteContentMap.get( repoId );
 
         if ( repo != null )
         {
             return repo;
         }
         else
         {
             throw new RepositoryNotFoundException(
                 "Unable to find remote repository configuration for id:" + repoId );
         }
 
     }
 
     public RemoteRepositoryContent getRemoteRepositoryContent( RemoteRepository mRepo )
         throws RepositoryException
     {
         final String id = mRepo.getId();
         RemoteRepositoryContent content = remoteContentMap.get( id );
 
         if ( content != null && content.getRepository()==mRepo)
         {
             return content;
         }
 
         RepositoryContentProvider contentProvider = getProvider( mRepo.getLayout( ), mRepo.getType( ) );
         content = contentProvider.createRemoteContent( mRepo );
         if (content==null) {
             throw new RepositoryException( "Could not create repository content instance for "+mRepo.getId() );
         }
         RemoteRepositoryContent previousContent = remoteContentMap.put( id, content );
         if (previousContent!=null) {
             previousContent.setRepository( null );
         }
         return content;
     }
 
 
     @Override
     public void afterConfigurationChange( Registry registry, String propertyName, Object propertyValue )
     {
         if ( ConfigurationNames.isManagedRepositories( propertyName ) || ConfigurationNames.isRemoteRepositories(
             propertyName ) )
         {
             initMaps( );
         }
     }
 
     @Override
     public void beforeConfigurationChange( Registry registry, String propertyName, Object propertyValue )
     {
         /* do nothing */
     }
 
     @PostConstruct
     public void initialize( )
     {
         archivaConfiguration.addChangeListener( this );
     }
 
     private void initMaps( )
     {
         // olamy we use concurent so no need of synchronize
         //synchronized ( managedContentMap )
         //{
         managedContentMap.clear( );
         //}
 
         //synchronized ( remoteContentMap )
         //{
         remoteContentMap.clear( );
         //}
     }
 
     public ArchivaConfiguration getArchivaConfiguration( )
     {
         return archivaConfiguration;
     }
 
     public void setArchivaConfiguration( ArchivaConfiguration archivaConfiguration )
     {
         this.archivaConfiguration = archivaConfiguration;
     }
 
     public void setRepositoryContentProviders(List<RepositoryContentProvider> providers) {
         this.repositoryContentProviders = providers;
     }
 
     public List<RepositoryContentProvider> getRepositoryContentProviders() {
         return repositoryContentProviders;
     }
 }