package org.apache.maven.lifecycle.internal;
   
   /*
    * 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.ArrayList;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.TreeMap;
  
  import javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.lifecycle.Lifecycle;
  import org.apache.maven.lifecycle.LifecycleMappingDelegate;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.model.PluginExecution;
  import org.apache.maven.plugin.BuildPluginManager;
  import org.apache.maven.plugin.InvalidPluginDescriptorException;
  import org.apache.maven.plugin.MojoExecution;
  import org.apache.maven.plugin.MojoNotFoundException;
  import org.apache.maven.plugin.PluginDescriptorParsingException;
  import org.apache.maven.plugin.PluginNotFoundException;
  import org.apache.maven.plugin.PluginResolutionException;
  import org.apache.maven.plugin.descriptor.MojoDescriptor;
  import org.apache.maven.project.MavenProject;
  
  /**
   * Lifecycle mapping delegate component interface. Calculates project build execution plan given {@link Lifecycle} and
   * lifecycle phase. Standard lifecycles use plugin execution {@code <phase>} or mojo default lifecycle phase to
   * calculate the execution plan, but custom lifecycles can use alternative mapping strategies.
   */
  @Named( DefaultLifecycleMappingDelegate.HINT )
  @Singleton
  public class DefaultLifecycleMappingDelegate
      implements LifecycleMappingDelegate
  {
      public static final String HINT = "default";
  
      private final BuildPluginManager pluginManager;
  
      @Inject
      public DefaultLifecycleMappingDelegate( BuildPluginManager pluginManager )
      {
          this.pluginManager = pluginManager;
      }
  
      public Map<String, List<MojoExecution>> calculateLifecycleMappings( MavenSession session, MavenProject project,
                                                                          Lifecycle lifecycle, String lifecyclePhase )
          throws PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
          MojoNotFoundException, InvalidPluginDescriptorException
      {
          /*
           * Initialize mapping from lifecycle phase to bound mojos. The key set of this map denotes the phases the caller
           * is interested in, i.e. all phases up to and including the specified phase.
           */
  
          Map<String, Map<Integer, List<MojoExecution>>> mappings =
              new LinkedHashMap<>();
  
          for ( String phase : lifecycle.getPhases() )
          {
              Map<Integer, List<MojoExecution>> phaseBindings = new TreeMap<>();
  
              mappings.put( phase, phaseBindings );
  
              if ( phase.equals( lifecyclePhase ) )
              {
                  break;
              }
          }
  
          /*
           * Grab plugin executions that are bound to the selected lifecycle phases from project. The effective model of
           * the project already contains the plugin executions induced by the project's packaging type. Remember, all
           * phases of interest and only those are in the lifecycle mapping, if a phase has no value in the map, we are
           * not interested in any of the executions bound to it.
           */
  
          for ( Plugin plugin : project.getBuild().getPlugins() )
         {
             for ( PluginExecution execution : plugin.getExecutions() )
             {
                 // if the phase is specified then I don't have to go fetch the plugin yet and pull it down
                 // to examine the phase it is associated to.
                 if ( execution.getPhase() != null )
                 {
                     Map<Integer, List<MojoExecution>> phaseBindings = mappings.get( execution.getPhase() );
                     if ( phaseBindings != null )
                     {
                         for ( String goal : execution.getGoals() )
                         {
                             MojoExecution mojoExecution = new MojoExecution( plugin, goal, execution.getId() );
                             mojoExecution.setLifecyclePhase( execution.getPhase() );
                             addMojoExecution( phaseBindings, mojoExecution, execution.getPriority() );
                         }
                     }
                 }
                 // if not then I need to grab the mojo descriptor and look at the phase that is specified
                 else
                 {
                     for ( String goal : execution.getGoals() )
                     {
                         MojoDescriptor mojoDescriptor =
                             pluginManager.getMojoDescriptor( plugin, goal, project.getRemotePluginRepositories(),
                                                              session.getRepositorySession() );
 
                         Map<Integer, List<MojoExecution>> phaseBindings = mappings.get( mojoDescriptor.getPhase() );
                         if ( phaseBindings != null )
                         {
                             MojoExecution mojoExecution = new MojoExecution( mojoDescriptor, execution.getId() );
                             mojoExecution.setLifecyclePhase( mojoDescriptor.getPhase() );
                             addMojoExecution( phaseBindings, mojoExecution, execution.getPriority() );
                         }
                     }
                 }
             }
         }
 
         Map<String, List<MojoExecution>> lifecycleMappings = new LinkedHashMap<>();
 
         for ( Map.Entry<String, Map<Integer, List<MojoExecution>>> entry : mappings.entrySet() )
         {
             List<MojoExecution> mojoExecutions = new ArrayList<>();
 
             for ( List<MojoExecution> executions : entry.getValue().values() )
             {
                 mojoExecutions.addAll( executions );
             }
 
             lifecycleMappings.put( entry.getKey(), mojoExecutions );
         }
 
         return lifecycleMappings;
 
     }
 
     private void addMojoExecution( Map<Integer, List<MojoExecution>> phaseBindings, MojoExecution mojoExecution,
                                    int priority )
     {
         List<MojoExecution> mojoExecutions = phaseBindings.computeIfAbsent( priority, k -> new ArrayList<>() );
 
         mojoExecutions.add( mojoExecution );
     }
 
 }