package org.apache.maven.lifecycle;
   
   /*
    * 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 java.util.Arrays;
  import java.util.Comparator;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Objects;
  import java.util.stream.Collectors;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.codehaus.plexus.PlexusContainer;
  import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @since 3.0
   * @author Jason van Zyl
   * @author Kristian Rosenvold
   */
  // TODO The configuration for the lifecycle needs to be externalized so that I can use the annotations properly for the
  // wiring and reference and external source for the lifecycle configuration.
  @Named
  @Singleton
  public class DefaultLifecycles
  {
      public static final String[] STANDARD_LIFECYCLES = { "clean", "default", "site", "wrapper" };
  
      private final Logger logger = LoggerFactory.getLogger( getClass() );
  
      // @Configuration(source="org/apache/maven/lifecycle/lifecycles.xml")
  
      private final PlexusContainer plexusContainer;
  
      public DefaultLifecycles()
      {
          this.plexusContainer = null;
      }
  
      @Inject
      public DefaultLifecycles( PlexusContainer plexusContainer )
      {
          this.plexusContainer = plexusContainer;
      }
  
      /**
       * Get lifecycle based on phase
       *
       * @param phase
       * @return
       */
      public Lifecycle get( String phase )
      {
          return getPhaseToLifecycleMap().get( phase );
      }
  
      /**
       * We use this to map all phases to the lifecycle that contains it. This is used so that a user can specify the
       * phase they want to execute and we can easily determine what lifecycle we need to run.
       *
       * @return A map of lifecycles, indexed on id
       */
      public Map<String, Lifecycle> getPhaseToLifecycleMap()
      {
          // If people are going to make their own lifecycles then we need to tell people how to namespace them correctly
          // so that they don't interfere with internally defined lifecycles.
  
          Map<String, Lifecycle> phaseToLifecycleMap = new HashMap<>();
  
          for ( Lifecycle lifecycle : getLifeCycles() )
          {
              if ( logger.isDebugEnabled() )
              {
                  logger.debug( "Lifecycle " + lifecycle );
              }
  
             for ( String phase : lifecycle.getPhases() )
             {
                 // The first definition wins.
                 if ( !phaseToLifecycleMap.containsKey( phase ) )
                 {
                     phaseToLifecycleMap.put( phase, lifecycle );
                 }
                 else
                 {
                     Lifecycle original = phaseToLifecycleMap.get( phase );
                     logger.warn( "Duplicated lifecycle phase " + phase + ". Defined in " + original.getId()
                         + " but also in " + lifecycle.getId() );
                 }
             }
         }
 
         return phaseToLifecycleMap;
     }
 
     /**
      * Returns an ordered list of lifecycles
      */
     public List<Lifecycle> getLifeCycles()
     {
         List<String> lifecycleIds = Arrays.asList( STANDARD_LIFECYCLES );
 
         Comparator<String> comparator = ( l, r ) ->
         {
             int lx = lifecycleIds.indexOf( l );
             int rx = lifecycleIds.indexOf( r );
 
             if ( lx < 0 || rx < 0 )
             {
                 return rx - lx;
             }
             else
             {
                 return lx - rx;
             }
         };
 
         Map<String, Lifecycle> lifecyclesMap = lookupLifecycles();
 
         // ensure canonical order of standard lifecycles
         return lifecyclesMap.values().stream()
                                 .peek( l -> Objects.requireNonNull( l.getId(), "A lifecycle must have an id." ) )
                                 .sorted( Comparator.comparing( Lifecycle::getId, comparator ) )
                                 .collect( Collectors.toList() );
     }
 
     private Map<String, Lifecycle> lookupLifecycles()
     {
         // TODO: Remove the following code when maven-compat is gone
         // This code is here to ensure maven-compat's EmptyLifecycleExecutor keeps on working.
         if ( plexusContainer == null )
         {
             return new HashMap<>();
         }
 
         // Lifecycles cannot be cached as extensions might add custom lifecycles later in the execution.
         try
         {
             return plexusContainer.lookupMap( Lifecycle.class );
         }
         catch ( ComponentLookupException e )
         {
             throw new IllegalStateException( "Unable to lookup lifecycles from the plexus container", e );
         }
     }
 
     public String getLifecyclePhaseList()
     {
         return getLifeCycles().stream()
                         .flatMap( l -> l.getPhases().stream() )
                         .collect( Collectors.joining( ", " ) );
     }
 
 }