package org.apache.archiva.rest.services.utils;
   /*
    * 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.archiva.metadata.model.ArtifactMetadata;
  import org.apache.archiva.metadata.model.maven2.MavenArtifactFacet;
  import org.apache.archiva.model.ArtifactReference;
  import org.apache.archiva.repository.ManagedRepositoryContent;
  import org.apache.archiva.maven2.model.Artifact;
  import org.apache.commons.io.FilenameUtils;
  
  import java.io.File;
  import java.text.DecimalFormat;
  import java.text.DecimalFormatSymbols;
  import java.util.Locale;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * @author Olivier Lamy
   * @since 1.4-M3
   */
  public class ArtifactBuilder
  {
  
      private ManagedRepositoryContent managedRepositoryContent;
  
      private ArtifactMetadata artifactMetadata;
  
      public ArtifactBuilder()
      {
          // no op
      }
  
  
      public ArtifactBuilder withManagedRepositoryContent( ManagedRepositoryContent managedRepositoryContent )
      {
          this.managedRepositoryContent = managedRepositoryContent;
          return this;
      }
  
      public ArtifactBuilder forArtifactMetadata( ArtifactMetadata artifactMetadata )
      {
          this.artifactMetadata = artifactMetadata;
          return this;
      }
  
      public Artifact build()
      {
          ArtifactReference ref = new ArtifactReference();
          ref.setArtifactId( artifactMetadata.getProject() );
          ref.setGroupId( artifactMetadata.getNamespace() );
          ref.setVersion( artifactMetadata.getVersion() );
  
          String type = null, classifier = null;
  
          MavenArtifactFacet facet = (MavenArtifactFacet) artifactMetadata.getFacet( MavenArtifactFacet.FACET_ID );
          if ( facet != null )
          {
              type = facet.getType();
              classifier = facet.getClassifier();
          }
  
          ref.setClassifier( classifier );
          ref.setType( type );
          File file = managedRepositoryContent.toFile( ref );
  
          String extension = getExtensionFromFile(file);
          
          Artifact artifact = new Artifact( ref.getGroupId(), ref.getArtifactId(), ref.getVersion() );
          artifact.setRepositoryId( artifactMetadata.getRepositoryId() );
          artifact.setClassifier( classifier );
          artifact.setPackaging( type );
          artifact.setType( type );
          artifact.setFileExtension( extension );
          artifact.setPath( managedRepositoryContent.toPath( ref ) );
          // TODO: find a reusable formatter for this
          double s = this.artifactMetadata.getSize();
          String symbol = "b";
          if ( s > 1024 )
          {
              symbol = "K";
              s /= 1024;
 
             if ( s > 1024 )
             {
                 symbol = "M";
                 s /= 1024;
 
                 if ( s > 1024 )
                 {
                     symbol = "G";
                     s /= 1024;
                 }
             }
         }
         artifact.setContext( managedRepositoryContent.getId() );
         DecimalFormat df = new DecimalFormat( "#,###.##", new DecimalFormatSymbols( Locale.US ) );
         artifact.setSize( df.format( s ) + " " + symbol );
 
         artifact.setId( ref.getArtifactId() + "-" + ref.getVersion() + "." + ref.getType() );
 
         return artifact;
 
     }
 
 
     /**
      * Extract file extension
      */
     String getExtensionFromFile( File file )
     {
         // we are just interested in the section after the last -
         String[] parts = file.getName().split( "-" );
         if ( parts.length > 0 )
         {
             // get anything after a dot followed by a letter a-z, including other dots
             Pattern p = Pattern.compile( "\\.([a-z]+[a-z0-9\\.]*)" );
             Matcher m = p.matcher( parts[parts.length - 1] );
             if ( m.find() )
             {
                 return m.group( 1 );
             }
         }
         // just in case
         return FilenameUtils.getExtension( file.getName() );
     }
 
 }