package org.apache.maven.report.projectinfo;
   
   /*
    * 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.Collections;
  import java.util.Comparator;
  import java.util.List;
  import java.util.Locale;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.versioning.VersionRange;
  import org.apache.maven.doxia.sink.Sink;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.model.ReportPlugin;
  import org.apache.maven.plugin.logging.Log;
  import org.apache.maven.plugins.annotations.Mojo;
  import org.apache.maven.plugins.annotations.ResolutionScope;
  import org.apache.maven.project.DefaultProjectBuildingRequest;
  import org.apache.maven.project.MavenProject;
  import org.apache.maven.project.ProjectBuilder;
  import org.apache.maven.project.ProjectBuildingException;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.repository.RepositorySystem;
  import org.codehaus.plexus.i18n.I18N;
  import org.codehaus.plexus.util.StringUtils;
  
  /**
   * Generates the Project Plugins report.
   *
   * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton</a>
   * @since 2.1
   */
  @Mojo( name = "plugins", requiresDependencyResolution = ResolutionScope.TEST )
  public class PluginsReport
      extends AbstractProjectInfoReport
  {
      // ----------------------------------------------------------------------
      // Public methods
      // ----------------------------------------------------------------------
  
      @Override
      public boolean canGenerateReport()
      {
          boolean result = super.canGenerateReport();
          if ( result && skipEmptyReport )
          {
              result = !isEmpty( getProject().getBuildPlugins() ) || !isEmpty( getProject().getReportPlugins() );
          }
  
          return result;
      }
  
      @Override
      public void executeReport( Locale locale )
      {
          PluginsRenderer r =
              new PluginsRenderer( getLog(), getSink(), locale, getI18N( locale ), project.getBuildPlugins(),
                                   project.getReportPlugins(), project, projectBuilder, repositorySystem,
                                   getSession().getProjectBuildingRequest() );
          r.render();
      }
  
      /** {@inheritDoc} */
      public String getOutputName()
      {
          return "plugins";
      }
  
      @Override
      protected String getI18Nsection()
      {
          return "plugins";
      }
  
      // ----------------------------------------------------------------------
      // Private
      // ----------------------------------------------------------------------
  
      /**
       * Internal renderer class
      */
     protected static class PluginsRenderer
         extends AbstractProjectInfoRenderer
     {
         private final Log log;
 
         private final List<Plugin> plugins;
 
         private final List<ReportPlugin> reports;
 
         private final MavenProject project;
 
         private final ProjectBuilder projectBuilder;
 
         private final RepositorySystem repositorySystem;
 
         private final ProjectBuildingRequest buildingRequest;
 
         /**
          * @param log {@link #log}
          * @param sink {@link Sink}
          * @param locale {@link Locale}
          * @param i18n {@link I18N}
          * @param plugins {@link Artifact}
          * @param reports {@link Artifact}
          * @param project {@link MavenProject}
          * @param projectBuilder {@link ProjectBuilder}
          * @param repositorySystem {@link RepositorySystem}
          * @param buildingRequest {@link ProjectBuildingRequest}
          *
          */
         public PluginsRenderer( Log log, Sink sink, Locale locale, I18N i18n, List<Plugin> plugins,
                                 List<ReportPlugin> reports, MavenProject project,
                                 ProjectBuilder projectBuilder, RepositorySystem repositorySystem,
                                 ProjectBuildingRequest buildingRequest )
         {
             super( sink, i18n, locale );
 
             this.log = log;
 
             this.plugins = new ArrayList<>( plugins );
 
             this.reports = new ArrayList<>( reports );
 
             this.project = project;
 
             this.projectBuilder = projectBuilder;
 
             this.repositorySystem = repositorySystem;
 
             this.buildingRequest = buildingRequest;
         }
 
         @Override
         protected String getI18Nsection()
         {
             return "plugins";
         }
 
         @Override
         public void renderBody()
         {
             // === Section: Project Plugins.
             renderSectionPlugins( true );
 
             // === Section: Project Reports.
             renderSectionPlugins( false );
         }
 
         /**
          * @param isPlugins <code>true</code> to use <code>plugins</code> variable, <code>false</code> to use
          * <code>reports</code> variable.
          */
         private void renderSectionPlugins( boolean isPlugins )
         {
             List<GAV> list = isPlugins ? GAV.pluginsToGAV( plugins ) : GAV.reportPluginsToGAV( reports, project );
             
             String[] tableHeader = getPluginTableHeader();
 
             startSection( getI18nString( isPlugins ? "build.title" : "report.title" ) );
 
             if ( list.isEmpty() )
             {
 
                 paragraph( getI18nString( isPlugins ? "nolist" : "report.nolist" ) ) ;
                 endSection();
                 return;
             }
 
             Collections.sort( list, getPluginComparator() );
 
             startTable();
             tableHeader( tableHeader );
 
             List<ArtifactRepository> artifactRepositories = project.getPluginArtifactRepositories();
             if ( artifactRepositories == null )
             {
                 artifactRepositories = new ArrayList<>();
             }
 
             ProjectBuildingRequest buildRequest = new DefaultProjectBuildingRequest( buildingRequest );
             buildRequest.setRemoteRepositories( artifactRepositories );
             
             for ( GAV plugin : list )
             {
                 VersionRange versionRange = VersionRange.createFromVersion( plugin.getVersion() );
 
                 
                 Artifact pluginArtifact =
                                 repositorySystem.createProjectArtifact( plugin.getGroupId(), plugin.getArtifactId(),
                                                           versionRange.toString() );
                 try
                 {
                     MavenProject pluginProject = projectBuilder.build( pluginArtifact, buildRequest ).getProject();
 
                     tableRow( getPluginRow( pluginProject.getGroupId(), pluginProject.getArtifactId(), pluginProject
                                             .getVersion(), pluginProject.getUrl() ) );
                 }
                 catch ( ProjectBuildingException e )
                 {
                     log.info( "Could not build project for " + plugin.getArtifactId() + ": " + e.getMessage(), e );
                     tableRow( getPluginRow( plugin.getGroupId(), plugin.getArtifactId(), plugin.getVersion(),
                                             null ) );
                 }
 
             }
             endTable();
 
             endSection();
         }
 
         // ----------------------------------------------------------------------
         // Private methods
         // ----------------------------------------------------------------------
 
         private String[] getPluginTableHeader()
         {
             // reused key...
             String groupId = getI18nString( "dependency-management", "column.groupId" );
             String artifactId = getI18nString( "dependency-management", "column.artifactId" );
             String version = getI18nString( "dependency-management", "column.version" );
             return new String[] { groupId, artifactId, version };
         }
 
         private String[] getPluginRow( String groupId, String artifactId, String version, String link )
         {
             artifactId = ProjectInfoReportUtils.getArtifactIdCell( artifactId, link );
             return new String[] { groupId, artifactId, version };
         }
 
         private static class GAV
         {
             private final String groupId;
             private final String artifactId;
             private final String version;
 
             private GAV( Plugin plugin )
             {
                 groupId = plugin.getGroupId();
                 artifactId = plugin.getArtifactId();
                 version = StringUtils.isEmpty( plugin.getVersion() ) ? Artifact.RELEASE_VERSION : plugin.getVersion();
             }
 
             private GAV( ReportPlugin reportPlugin, MavenProject project )
             {
                 groupId = reportPlugin.getGroupId();
                 artifactId = reportPlugin.getArtifactId();
                 version = resolveReportPluginVersion( reportPlugin, project );
             }
 
             public String getGroupId()
             {
                 return groupId;
             }
 
             public String getArtifactId()
             {
                 return artifactId;
             }
 
             public String getVersion()
             {
                 return version;
             }
 
             public static List<GAV> pluginsToGAV( List<Plugin> plugins )
             {
                 List<GAV> result = new ArrayList<>( plugins.size() );
                 for ( Plugin plugin : plugins )
                 {
                     result.add( new GAV( plugin ) );
                 }
                 return result;
             }
 
             public static List<GAV> reportPluginsToGAV( List<ReportPlugin> reportPlugins, MavenProject project )
             {
                 List<GAV> result = new ArrayList<>( reportPlugins.size() );
                 for ( ReportPlugin reportPlugin : reportPlugins )
                 {
                     result.add( new GAV( reportPlugin, project ) );
                 }
                 return result;
             }
         }
 
         private Comparator<GAV> getPluginComparator()
         {
             return new Comparator<GAV>()
             {
                 /** {@inheritDoc} */
                 public int compare( GAV a1, GAV a2 )
                 {
                     int result = a1.groupId.compareTo( a2.groupId );
                     if ( result == 0 )
                     {
                         result = a1.artifactId.compareTo( a2.artifactId );
                     }
                     return result;
                 }
             };
         }
 
         /**
          * Resolve report plugin version. Steps to find a plugin version stop after each step if a non <code>null</code>
          * value has been found:
          * <ol>
          * <li>use the one defined in the reportPlugin configuration,</li>
          * <li>search similar (same groupId and artifactId) mojo in the build/plugins section of the pom,</li>
          * <li>search similar (same groupId and artifactId) mojo in the build/pluginManagement section of the pom,</li>
          * <li>default value is RELEASE.</li>
          * </ol>
          *
          * @param reportPlugin the report plugin to resolve the version
          * @param project the current project
          * @return the report plugin version
          */
         protected static String resolveReportPluginVersion( ReportPlugin reportPlugin, MavenProject project )
         {
             // look for version defined in the reportPlugin configuration
             if ( reportPlugin.getVersion() != null )
             {
                 return reportPlugin.getVersion();
             }
 
             // search in the build section
             if ( project.getBuild() != null )
             {
                 Plugin plugin = find( reportPlugin, project.getBuild().getPlugins() );
 
                 if ( plugin != null && plugin.getVersion() != null )
                 {
                     return plugin.getVersion();
                 }
             }
 
             // search in pluginManagement section
             if ( project.getBuild() != null && project.getBuild().getPluginManagement() != null )
             {
                 Plugin plugin = find( reportPlugin, project.getBuild().getPluginManagement().getPlugins() );
 
                 if ( plugin != null && plugin.getVersion() != null )
                 {
                     return plugin.getVersion();
                 }
             }
 
             // empty version
             return Artifact.RELEASE_VERSION;
         }
 
         /**
          * Search similar (same groupId and artifactId) plugin as a given report plugin.
          *
          * @param reportPlugin the report plugin to search for a similar plugin
          * @param plugins the candidate plugins
          * @return the first similar plugin
          */
         private static Plugin find( ReportPlugin reportPlugin, List<Plugin> plugins )
         {
             if ( plugins == null )
             {
                 return null;
             }
             for ( Plugin plugin : plugins )
             {
                 if ( StringUtils.equals( plugin.getArtifactId(), reportPlugin.getArtifactId() )
                     && StringUtils.equals( plugin.getGroupId(), reportPlugin.getGroupId() ) )
                 {
                     return plugin;
                 }
             }
             return null;
         }
     }
 }