package org.apache.maven.model.plugin;
   
   /*
    * 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.maven.model.Build;
  import org.apache.maven.model.Model;
  import org.apache.maven.model.Plugin;
  import org.apache.maven.model.PluginManagement;
  import org.apache.maven.model.ReportPlugin;
  import org.apache.maven.model.ReportSet;
  import org.apache.maven.model.Reporting;
  import org.apache.maven.model.building.ModelBuildingRequest;
  import org.apache.maven.model.building.ModelProblemCollector;
  import org.apache.maven.model.building.ModelProblem.Severity;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.xml.Xpp3Dom;
  
  /**
   * Handles conversion of the legacy reporting section into the configuration of the new Maven Site Plugin.
   * 
   * @author Benjamin Bentmann
   */
  @Component( role = ReportingConverter.class )
  public class DefaultReportingConverter
      implements ReportingConverter
  {
  
      public void convertReporting( Model model, ModelBuildingRequest request, ModelProblemCollector problems )
      {
          Reporting reporting = model.getReporting();
  
          if ( reporting == null )
          {
              return;
          }
  
          Build build = model.getBuild();
  
          if ( build == null )
          {
              build = new Build();
              model.setBuild( build );
          }
  
          Plugin sitePlugin = findSitePlugin( build );
  
          if ( sitePlugin == null )
          {
              sitePlugin = new Plugin();
              sitePlugin.setArtifactId( "maven-site-plugin" );
              PluginManagement pluginManagement = build.getPluginManagement();
              if ( pluginManagement == null )
              {
                  pluginManagement = new PluginManagement();
                  build.setPluginManagement( pluginManagement );
              }
              pluginManagement.addPlugin( sitePlugin );
          }
  
          Xpp3Dom configuration = (Xpp3Dom) sitePlugin.getConfiguration();
  
          if ( configuration == null )
          {
              configuration = new Xpp3Dom( "configuration" );
              sitePlugin.setConfiguration( configuration );
          }
  
          Xpp3Dom reportPlugins = configuration.getChild( "reportPlugins" );
  
          if ( reportPlugins != null )
          {
              // new-style report configuration already present, assume user handled entire conversion
              return;
          }
  
          if ( configuration.getChild( "outputDirectory" ) == null )
          {
              addDom( configuration, "outputDirectory", reporting.getOutputDirectory() );
          }
  
          reportPlugins = new Xpp3Dom( "reportPlugins" );
         configuration.addChild( reportPlugins );
 
         boolean hasMavenProjectInfoReportsPlugin = false;
 
         if ( !reporting.getPlugins().isEmpty()
             && request.getValidationLevel() >= ModelBuildingRequest.VALIDATION_LEVEL_MAVEN_3_1 )
         {
 
             problems.add( Severity.WARNING, "The <reporting> section is deprecated"
                 + ", please move the reports to the <configuration> section of the new Maven Site Plugin.",
                           reporting.getLocation( "" ), null );
         }
 
         for ( ReportPlugin plugin : reporting.getPlugins() )
         {
             Xpp3Dom reportPlugin = convert( plugin );
             reportPlugins.addChild( reportPlugin );
 
             if ( !reporting.isExcludeDefaults() && !hasMavenProjectInfoReportsPlugin
                 && "org.apache.maven.plugins".equals( reportPlugin.getChild( "groupId" ).getValue() )
                 && "maven-project-info-reports-plugin".equals( reportPlugin.getChild( "artifactId" ).getValue() ) )
             {
                 hasMavenProjectInfoReportsPlugin = true;
             }
         }
 
         if ( !reporting.isExcludeDefaults() && !hasMavenProjectInfoReportsPlugin )
         {
             Xpp3Dom dom = new Xpp3Dom( "reportPlugin" );
 
             addDom( dom, "groupId", "org.apache.maven.plugins" );
             addDom( dom, "artifactId", "maven-project-info-reports-plugin" );
 
             reportPlugins.addChild( dom );
         }
     }
 
     private Plugin findSitePlugin( Build build )
     {
         for ( Plugin plugin : build.getPlugins() )
         {
             if ( isSitePlugin( plugin ) )
             {
                 return plugin;
             }
         }
 
         PluginManagement pluginManagement = build.getPluginManagement();
         if ( pluginManagement != null )
         {
             for ( Plugin plugin : pluginManagement.getPlugins() )
             {
                 if ( isSitePlugin( plugin ) )
                 {
                     return plugin;
                 }
             }
         }
 
         return null;
     }
 
     private boolean isSitePlugin( Plugin plugin )
     {
         return "maven-site-plugin".equals( plugin.getArtifactId() )
             && "org.apache.maven.plugins".equals( plugin.getGroupId() );
     }
 
     private Xpp3Dom convert( ReportPlugin plugin )
     {
         Xpp3Dom dom = new Xpp3Dom( "reportPlugin" );
 
         addDom( dom, "groupId", plugin.getGroupId() );
         addDom( dom, "artifactId", plugin.getArtifactId() );
         addDom( dom, "version", plugin.getVersion() );
 
         Xpp3Dom configuration = (Xpp3Dom) plugin.getConfiguration();
         if ( configuration != null )
         {
             configuration = new Xpp3Dom( configuration );
             dom.addChild( configuration );
         }
 
         if ( !plugin.getReportSets().isEmpty() )
         {
             Xpp3Dom reportSets = new Xpp3Dom( "reportSets" );
             for ( ReportSet reportSet : plugin.getReportSets() )
             {
                 Xpp3Dom rs = convert( reportSet );
                 reportSets.addChild( rs );
             }
             dom.addChild( reportSets );
         }
 
         return dom;
     }
 
     private Xpp3Dom convert( ReportSet reportSet )
     {
         Xpp3Dom dom = new Xpp3Dom( "reportSet" );
 
         addDom( dom, "id", reportSet.getId() );
 
         Xpp3Dom configuration = (Xpp3Dom) reportSet.getConfiguration();
         if ( configuration != null )
         {
             configuration = new Xpp3Dom( configuration );
             dom.addChild( configuration );
         }
 
         if ( !reportSet.getReports().isEmpty() )
         {
             Xpp3Dom reports = new Xpp3Dom( "reports" );
             for ( String report : reportSet.getReports() )
             {
                 addDom( reports, "report", report );
             }
             dom.addChild( reports );
         }
 
         return dom;
     }
 
     private void addDom( Xpp3Dom parent, String childName, String childValue )
     {
         if ( StringUtils.isNotEmpty( childValue ) )
         {
             parent.addChild( newDom( childName, childValue ) );
         }
     }
 
     private Xpp3Dom newDom( String name, String value )
     {
         Xpp3Dom dom = new Xpp3Dom( name );
         dom.setValue( value );
         return dom;
     }
 
 }