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 org.apache.maven.doxia.sink.Sink;

 import org.apache.maven.doxia.sink.SinkEventAttributeSet;

 import org.apache.maven.doxia.sink.SinkEventAttributes;

 import org.apache.maven.model.Dependency;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.reporting.MavenReportException;

 import org.codehaus.plexus.util.StringUtils;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Locale;

 import java.util.Map;

 import java.util.TreeMap;

 /**

  * Generates the Dependency Convergence report for reactor builds.

  *

  * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>

  * @author <a href="mailto:vincent.siveton@gmail.com">Vincent Siveton </a>

  * @version $Id: DependencyConvergenceReport.java 1038048 2010-11-23 10:52:14Z vsiveton $

  * @since 2.0

  * @goal dependency-convergence

  * @aggregator

  */

 public class DependencyConvergenceReport

     extends AbstractProjectInfoReport

 {

     private static final int PERCENTAGE = 100;

     // ----------------------------------------------------------------------

     // Mojo parameters

     // ----------------------------------------------------------------------

     /**

      * The projects in the current build. The effective-POM for

      * each of these projects will written.

      *

      * @parameter expression="${reactorProjects}"

      * @required

      * @readonly

      */

     private List<MavenProject> reactorProjects;

     // ----------------------------------------------------------------------

     // Public methods

     // ----------------------------------------------------------------------

     /** {@inheritDoc} */

     public String getOutputName()

     {

         return "dependency-convergence";

     }

     @Override

     protected String getI18Nsection()

     {

         return "dependency-convergence";

     }

     @Override

     public boolean canGenerateReport()

     {

         // only generate the convergency report if we are running a reactor build

         return reactorProjects.size() > 1;

     }

     // ----------------------------------------------------------------------

     // Protected methods

     // ----------------------------------------------------------------------

     @Override

     protected void executeReport( Locale locale )

         throws MavenReportException

     {

         Sink sink = getSink();

         sink.head();

         sink.title();

         sink.text( getI18nString( locale, "title" ) );

         sink.title_();

         sink.head_();

         sink.body();

         sink.section1();

         sink.sectionTitle1();

         sink.text( getI18nString( locale, "title" ) );

         sink.sectionTitle1_();

         Map<String, List<ReverseDependencyLink>> dependencyMap = getDependencyMap();

         // legend

         generateLegend( locale, sink );

         sink.lineBreak();

         // stats

         generateStats( locale, sink, dependencyMap );

         sink.section1_();

         // convergence

         generateConvergence( locale, sink, dependencyMap );

         sink.body_();

         sink.flush();

         sink.close();

     }

     // ----------------------------------------------------------------------

     // Private methods

     // ----------------------------------------------------------------------

     /**

      * Generate the convergence table for all dependencies

      *

      * @param locale

      * @param sink

      * @param dependencyMap

      */

     private void generateConvergence( Locale locale, Sink sink, Map<String, List<ReverseDependencyLink>> dependencyMap )

     {

         sink.section2();

         sink.sectionTitle2();

         sink.text( getI18nString( locale, "convergence.caption" ) );

         sink.sectionTitle2_();

         for ( Map.Entry<String, List<ReverseDependencyLink>> entry : dependencyMap.entrySet() )

         {

             String key = entry.getKey();

             List<ReverseDependencyLink> depList = entry.getValue();

             sink.section3();

             sink.sectionTitle3();

             sink.text( key );

             sink.sectionTitle3_();

             generateDependencyDetails( sink, depList );

             sink.section3_();

         }

         sink.section2_();

     }

     /**

      * Generate the detail table for a given dependency

      *

      * @param sink

      * @param depList

      */

     private void generateDependencyDetails( Sink sink, List<ReverseDependencyLink> depList )

     {

         sink.table();

         Map<String, List<ReverseDependencyLink>> artifactMap = getSortedUniqueArtifactMap( depList );

         sink.tableRow();

         sink.tableCell( );

         if ( artifactMap.size() > 1 )

         {

             iconError( sink );

         }

         else

         {

             iconSuccess( sink );

         }

         sink.tableCell_();

         sink.tableCell();

         sink.table();

         for ( String version : artifactMap.keySet() )

         {

             sink.tableRow();

             sink.tableCell( new SinkEventAttributeSet( new String[] {SinkEventAttributes.WIDTH, "25%"} ) );

             sink.text( version );

             sink.tableCell_();

             sink.tableCell();

             generateVersionDetails( sink, artifactMap, version );

             sink.tableCell_();

             sink.tableRow_();

         }

         sink.table_();

         sink.tableCell_();

         sink.tableRow_();

         sink.table_();

     }

     private void generateVersionDetails( Sink sink, Map<String, List<ReverseDependencyLink>> artifactMap, String version )

     {

         sink.numberedList( 1 ); // Use lower alpha numbering

         List<ReverseDependencyLink> depList = artifactMap.get( version );

         Collections.sort( depList, new ReverseDependencyLinkComparator() );

         for ( ReverseDependencyLink rdl : depList )

         {

             sink.numberedListItem();

             if ( StringUtils.isNotEmpty( rdl.project.getUrl() ) )

             {

                 sink.link( rdl.project.getUrl() );

             }

             sink.text( rdl.project.getGroupId() + ":" + rdl.project.getArtifactId() );

             if ( StringUtils.isNotEmpty( rdl.project.getUrl() ) )

             {

                 sink.link_();

             }

             sink.numberedListItem_();

         }

         sink.numberedList_();

     }

     /**

      * Produce a Map of relationships between dependencies (its version) and

      * reactor projects.

      *

      * This is the structure of the Map:

      * <pre>

      * +--------------------+----------------------------------+

      * | key                | value                            |

      * +--------------------+----------------------------------+

      * | version of a       | A List of ReverseDependencyLinks |

      * | dependency         | which each look like this:       |

      * |                    | +------------+-----------------+ |

      * |                    | | dependency | reactor project | |

      * |                    | +------------+-----------------+ |

      * +--------------------+----------------------------------+

      * </pre>

      *

      * @return A Map of sorted unique artifacts

      */

     private Map<String, List<ReverseDependencyLink>> getSortedUniqueArtifactMap( List<ReverseDependencyLink> depList )

     {

         Map<String, List<ReverseDependencyLink>> uniqueArtifactMap = new TreeMap<String, List<ReverseDependencyLink>>();

         for ( ReverseDependencyLink rdl : depList )

         {

             String key = rdl.getDependency().getVersion();

             List<ReverseDependencyLink> projectList = uniqueArtifactMap.get( key );

             if ( projectList == null )

             {

                 projectList = new ArrayList<ReverseDependencyLink>();

             }

             projectList.add( rdl );

             uniqueArtifactMap.put( key, projectList );

         }

         return uniqueArtifactMap;

     }

     /**

      * Generate the legend table

      *

      * @param locale

      * @param sink

      */

     private void generateLegend( Locale locale, Sink sink )

     {

         sink.table();

         sink.tableCaption();

         sink.bold();

         sink.text( getI18nString( locale, "legend" ) );

         sink.bold_();

         sink.tableCaption_();

         sink.tableRow();

         sink.tableCell( );

         iconSuccess( sink );

         sink.tableCell_();

         sink.tableCell();

         sink.text( getI18nString( locale, "legend.shared" ) );

         sink.tableCell_();

         sink.tableRow_();

         sink.tableRow();

         sink.tableCell( );

         iconError( sink );

         sink.tableCell_();

         sink.tableCell();

         sink.text( getI18nString( locale, "legend.different" ) );

         sink.tableCell_();

         sink.tableRow_();

         sink.table_();

     }

     /**

      * Generate the statistic table

      *

      * @param locale

      * @param sink

      * @param dependencyMap

      */

     private void generateStats( Locale locale, Sink sink, Map<String, List<ReverseDependencyLink>> dependencyMap )

     {

         int depCount = dependencyMap.size();

         int artifactCount = 0;

         int snapshotCount = 0;

         for ( List<ReverseDependencyLink> depList : dependencyMap.values() )

         {

             Map<String, List<ReverseDependencyLink>> artifactMap = getSortedUniqueArtifactMap( depList );

             snapshotCount += countSnapshots( artifactMap );

             artifactCount += artifactMap.size();

         }

         int convergence = (int) ( ( (double) depCount / (double) artifactCount ) * PERCENTAGE );

         // Create report

         sink.table();

         sink.tableCaption();

         sink.bold();

         sink.text( getI18nString( locale, "stats.caption" ) );

         sink.bold_();

         sink.tableCaption_();

         sink.tableRow();

         sink.tableHeaderCell( );

         sink.text( getI18nString( locale, "stats.subprojects" ) );

         sink.tableHeaderCell_();

         sink.tableCell();

         sink.text( String.valueOf( reactorProjects.size() ) );

         sink.tableCell_();

         sink.tableRow_();

         sink.tableRow();

         sink.tableHeaderCell( );

         sink.text( getI18nString( locale, "stats.dependencies" ) );

         sink.tableHeaderCell_();

         sink.tableCell();

         sink.text( String.valueOf( depCount ) );

         sink.tableCell_();

         sink.tableRow_();

         sink.tableRow();

         sink.tableHeaderCell( );

         sink.text( getI18nString( locale, "stats.artifacts" ) );

         sink.tableHeaderCell_();

         sink.tableCell();

         sink.text( String.valueOf( artifactCount ) );

         sink.tableCell_();

         sink.tableRow_();

         sink.tableRow();

         sink.tableHeaderCell( );

         sink.text( getI18nString( locale, "stats.snapshots" ) );

         sink.tableHeaderCell_();

         sink.tableCell();

         sink.text( String.valueOf( snapshotCount ) );

         sink.tableCell_();

         sink.tableRow_();

         sink.tableRow();

         sink.tableHeaderCell( );

         sink.text( getI18nString( locale, "stats.convergence" ) );

         sink.tableHeaderCell_();

         sink.tableCell();

         if ( convergence < PERCENTAGE )

         {

             iconError( sink );

         }

         else

         {

             iconSuccess( sink );

         }

         sink.nonBreakingSpace();

         sink.bold();

         sink.text( String.valueOf( convergence ) + "%" );

         sink.bold_();

         sink.tableCell_();

         sink.tableRow_();

         sink.tableRow();

         sink.tableHeaderCell( );

         sink.text( getI18nString( locale, "stats.readyrelease" ) );

         sink.tableHeaderCell_();

         sink.tableCell();

         if ( convergence >= PERCENTAGE && snapshotCount <= 0 )

         {

             iconSuccess( sink );

             sink.nonBreakingSpace();

             sink.bold();

             sink.text( getI18nString( locale, "stats.readyrelease.success" ) );

             sink.bold_();

         }

         else

         {

             iconError( sink );

             sink.nonBreakingSpace();

             sink.bold();

             sink.text( getI18nString( locale, "stats.readyrelease.error" ) );

             sink.bold_();

             if ( convergence < PERCENTAGE )

             {

                 sink.lineBreak();

                 sink.text( getI18nString( locale, "stats.readyrelease.error.convergence" ) );

             }

             if ( snapshotCount > 0 )

             {

                 sink.lineBreak();

                 sink.text( getI18nString( locale, "stats.readyrelease.error.snapshots" ) );

             }

         }

         sink.tableCell_();

         sink.tableRow_();

         sink.table_();

     }

     private int countSnapshots( Map<String, List<ReverseDependencyLink>> artifactMap )

     {

         int count = 0;

         for ( Map.Entry<String, List<ReverseDependencyLink>> entry : artifactMap.entrySet() )

         {

             String version = entry.getKey();

             boolean isReactorProject = false;

             Iterator<ReverseDependencyLink> iterator = entry.getValue().iterator();

             // It if enough to check just the first dependency here, because

             // the dependency is the same in all the RDLs in the List. It's the

             // reactorProjects that are different.

             if ( iterator.hasNext() )

             {

                 ReverseDependencyLink rdl = iterator.next();

                 if ( isReactorProject( rdl.getDependency() ) )

                 {

                     isReactorProject = true;

                 }

             }

             if ( version.endsWith( "-SNAPSHOT" ) && !isReactorProject )

             {

                 count++;

             }

         }

         return count;

     }

     /**

      * Check to see if the specified dependency is among the reactor projects.

      *

      * @param dependency The dependency to check

      * @return true if and only if the dependency is a reactor project

      */

     private boolean isReactorProject( Dependency dependency )

     {

         for ( MavenProject mavenProject : reactorProjects )

         {

             if ( mavenProject.getGroupId().equals( dependency.getGroupId() )

                 && mavenProject.getArtifactId().equals( dependency.getArtifactId() ) )

             {

                 if ( getLog().isDebugEnabled() )

                 {

                     getLog().debug( dependency + " is a reactor project" );

                 }

                 return true;

             }

         }

         return false;

     }

     private void iconSuccess( Sink sink )

     {

         sink.figure();

         sink.figureCaption();

         sink.text( "success" );

         sink.figureCaption_();

         sink.figureGraphics( "images/icon_success_sml.gif" );

         sink.figure_();

     }

     private void iconError( Sink sink )

     {

         sink.figure();

         sink.figureCaption();

         sink.text( "error" );

         sink.figureCaption_();

         sink.figureGraphics( "images/icon_error_sml.gif" );

         sink.figure_();

     }

     /**

      * Produce a Map of relationships between dependencies

      * (its groupId:artifactId) and reactor projects.

      *

      * This is the structure of the Map:

      * <pre>

      * +--------------------+----------------------------------+

      * | key                | value                            |

      * +--------------------+----------------------------------+

      * | groupId:artifactId | A List of ReverseDependencyLinks |

      * | of a dependency    | which each look like this:       |

      * |                    | +------------+-----------------+ |

      * |                    | | dependency | reactor project | |

      * |                    | +------------+-----------------+ |

      * +--------------------+----------------------------------+

      * </pre>

      *

      * @return A Map of relationships between dependencies and reactor projects

      */

     private Map<String, List<ReverseDependencyLink>> getDependencyMap()

     {

         Map<String, List<ReverseDependencyLink>> dependencyMap = new TreeMap<String, List<ReverseDependencyLink>>();

         for ( MavenProject reactorProject : reactorProjects )

         {

             @SuppressWarnings( "unchecked" )

             Iterator<Dependency> itdep = reactorProject.getDependencies().iterator();

             while ( itdep.hasNext() )

             {

                 Dependency dep = itdep.next();

                 String key = dep.getGroupId() + ":" + dep.getArtifactId();

                 List<ReverseDependencyLink> depList = dependencyMap.get( key );

                 if ( depList == null )

                 {

                     depList = new ArrayList<ReverseDependencyLink>();

                 }

                 depList.add( new ReverseDependencyLink( dep, reactorProject ) );

                 dependencyMap.put( key, depList );

             }

         }

         return dependencyMap;

     }

     /**

      * Internal object

      */

     private static class ReverseDependencyLink

     {

         private Dependency dependency;

         protected MavenProject project;

         ReverseDependencyLink( Dependency dependency, MavenProject project )

         {

             this.dependency = dependency;

             this.project = project;

         }

         public Dependency getDependency()

         {

             return dependency;

         }

         public MavenProject getProject()

         {

             return project;

         }

         @Override

         public String toString()

         {

             return project.getId();

         }

     }

     /**

      * Internal ReverseDependencyLink comparator

      */

     static class ReverseDependencyLinkComparator

         implements Comparator<ReverseDependencyLink>

     {

         /** {@inheritDoc} */

         public int compare( ReverseDependencyLink p1, ReverseDependencyLink p2 )

         {

             return p1.getProject().getId().compareTo( p2.getProject().getId() );

         }

     }

 }