package com.soebes.maven.extensions;
   
   import java.util.Map;
   import java.util.Map.Entry;
   import java.util.concurrent.ConcurrentHashMap;
   
   import org.apache.maven.execution.ExecutionEvent;
   import org.apache.maven.plugin.MojoExecution;
   import org.apache.maven.project.MavenProject;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author Karl Heinz Marbaise <a href="mailto:kama@soebes.de">kama@soebes.de</a>
   */
  class GoalTimer
  {
      private final Logger LOGGER = LoggerFactory.getLogger( getClass() );
  
      private Map<ProjectGoal, SystemTime> timerEvents;
  
      public GoalTimer()
      {
          this.timerEvents = new ConcurrentHashMap<>();
      }
  
      public boolean hasEvents()
      {
          return !timerEvents.isEmpty();
      }
  
      private ProjectKey createProjectKey( MavenProject project )
      {
          return new ProjectKey( project.getGroupId(), project.getArtifactId(), project.getVersion() );
      }
  
      private GoalKey createGoalKey( MojoExecution mojo )
      {
          return new GoalKey( mojo.getGroupId(), mojo.getArtifactId(), mojo.getVersion(), mojo.getGoal(),
                              mojo.getExecutionId() );
      }
  
      public void mojoStart( ExecutionEvent event )
      {
          ProjectGoal pm =
              new ProjectGoal( createProjectKey( event.getProject() ), createGoalKey( event.getMojoExecution() ) );
          timerEvents.put( pm, new SystemTime().start() );
      }
  
      public void mojoStop( ExecutionEvent event )
      {
          ProjectGoal pm =
              new ProjectGoal( createProjectKey( event.getProject() ), createGoalKey( event.getMojoExecution() ) );
          if ( !timerEvents.containsKey( pm ) )
          {
              throw new IllegalArgumentException( "Unknown mojoId (" + pm + ")" );
          }
          timerEvents.get( pm ).stop();
      }
  
      public void report()
      {
          for ( Entry<ProjectGoal, SystemTime> item : this.timerEvents.entrySet() )
          {
              LOGGER.info( "{} ms : {}", String.format( "%8d", item.getValue().getElapsedTime() ),
                           item.getKey().getId() );
          }
      }
  }