package org.apache.maven.artifact.repository;
   
   /*
    * 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.io.File;
  import java.util.Collections;
  import java.util.List;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.artifact.metadata.ArtifactMetadata;
  import org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout;
  import org.apache.maven.repository.Proxy;
  
  /**
   * Abstraction of an artifact repository. Artifact repositories can be remote, local, or even build reactor or
   * IDE workspace.
   */
  //TODO completely separate local and remote artifact repositories
  public class MavenArtifactRepository
      implements ArtifactRepository
  {
      private String id;
  
      private String url;
  
      private String basedir;
  
      private String protocol;
  
      private ArtifactRepositoryLayout layout;
  
      private ArtifactRepositoryPolicy snapshots;
  
      private ArtifactRepositoryPolicy releases;
  
      private Authentication authentication;
  
      private Proxy proxy;
  
      private List<ArtifactRepository> mirroredRepositories = Collections.emptyList();
  
      public MavenArtifactRepository()
      {
      }
  
      /**
       * Create a remote download repository.
       *
       * @param id        the unique identifier of the repository
       * @param url       the URL of the repository
       * @param layout    the layout of the repository
       * @param snapshots the policies to use for snapshots
       * @param releases  the policies to use for releases
       */
      public MavenArtifactRepository( String id, String url, ArtifactRepositoryLayout layout,
                                      ArtifactRepositoryPolicy snapshots, ArtifactRepositoryPolicy releases )
      {
          this.id = id;
          this.url = url;
          this.layout = layout;
          this.snapshots = snapshots;
          this.releases = releases;
          //
          // Derive these from the URL
          //
          this.protocol = protocol( url );
          this.basedir = basedir( url );
      }
  
      public String pathOf( Artifact artifact )
      {
          return layout.pathOf( artifact );
      }
  
      public String pathOfRemoteRepositoryMetadata( ArtifactMetadata artifactMetadata )
      {
          return layout.pathOfRemoteRepositoryMetadata( artifactMetadata );
      }
  
      public String pathOfLocalRepositoryMetadata( ArtifactMetadata metadata, ArtifactRepository repository )
      {
          return layout.pathOfLocalRepositoryMetadata( metadata, repository );
     }
 
     public void setLayout( ArtifactRepositoryLayout layout )
     {
         this.layout = layout;
     }
 
     public ArtifactRepositoryLayout getLayout()
     {
         return layout;
     }
 
     public void setSnapshotUpdatePolicy( ArtifactRepositoryPolicy snapshots )
     {
         this.snapshots = snapshots;
     }
 
     public ArtifactRepositoryPolicy getSnapshots()
     {
         return snapshots;
     }
 
     public void setReleaseUpdatePolicy( ArtifactRepositoryPolicy releases )
     {
         this.releases = releases;
     }
 
     public ArtifactRepositoryPolicy getReleases()
     {
         return releases;
     }
 
     public String getKey()
     {
         return getId();
     }
 
     public String toString()
     {
         StringBuilder sb = new StringBuilder( 256 );
 
         sb.append( "      id: " ).append( getId() ).append( '\n' );
         sb.append( "      url: " ).append( getUrl() ).append( '\n' );
         sb.append( "   layout: " ).append( layout != null ? layout : "none" ).append( '\n' );
 
         if ( proxy != null )
         {
             sb.append( "    proxy: " ).append( proxy.getHost() ).append( ':' ).append( proxy.getPort() ).append( '\n' );
         }
 
         if ( snapshots != null )
         {
             sb.append( "snapshots: [enabled => " ).append( snapshots.isEnabled() );
             sb.append( ", update => " ).append( snapshots.getUpdatePolicy() ).append( "]\n" );
         }
 
         if ( releases != null )
         {
             sb.append( " releases: [enabled => " ).append( releases.isEnabled() );
             sb.append( ", update => " ).append( releases.getUpdatePolicy() ).append( "]\n" );
         }
 
         return sb.toString();
     }
 
     public Artifact find( Artifact artifact )
     {
         File artifactFile = new File( getBasedir(), pathOf( artifact ) );
 
         // We need to set the file here or the resolver will fail with an NPE, not fully equipped to deal
         // with multiple local repository implementations yet.
         artifact.setFile( artifactFile );
 
         return artifact;
     }
 
     public List<String> findVersions( Artifact artifact )
     {
         return Collections.emptyList();
     }
 
     public String getId()
     {
         return id;
     }
 
     public String getUrl()
     {
         return url;
     }
 
     public String getBasedir()
     {
         return basedir;
     }
 
     public String getProtocol()
     {
         return protocol;
     }
 
     public void setId( String id )
     {
         this.id = id;
     }
 
     public void setUrl( String url )
     {
         this.url = url;
 
         this.protocol = protocol( url );
         this.basedir = basedir( url );
     }
 
     // Path Utils
 
     /**
      * Return the protocol name.
      * <br>
      * E.g: for input
      * <code>http://www.codehaus.org</code> this method will return <code>http</code>
      *
      * @param url the url
      * @return the host name
      */
     private static String protocol( final String url )
     {
         final int pos = url.indexOf( ':' );
 
         if ( pos == -1 )
         {
             return "";
         }
         return url.substring( 0, pos ).trim();
     }
 
     /**
      * Derive the path portion of the given URL.
      *
      * @param url the repository URL
      * @return the basedir of the repository
      * TODO need to URL decode for spaces?
      */
     private String basedir( String url )
     {
         String retValue = null;
 
         if ( protocol.equalsIgnoreCase( "file" ) )
         {
             retValue = url.substring( protocol.length() + 1 );
             retValue = decode( retValue );
             // special case: if omitted // on protocol, keep path as is
             if ( retValue.startsWith( "//" ) )
             {
                 retValue = retValue.substring( 2 );
 
                 if ( retValue.length() >= 2 && ( retValue.charAt( 1 ) == '|' || retValue.charAt( 1 ) == ':' ) )
                 {
                     // special case: if there is a windows drive letter, then keep the original return value
                     retValue = retValue.charAt( 0 ) + ":" + retValue.substring( 2 );
                 }
                 else
                 {
                     // Now we expect the host
                     int index = retValue.indexOf( '/' );
                     if ( index >= 0 )
                     {
                         retValue = retValue.substring( index + 1 );
                     }
 
                     // special case: if there is a windows drive letter, then keep the original return value
                     if ( retValue.length() >= 2 && ( retValue.charAt( 1 ) == '|' || retValue.charAt( 1 ) == ':' ) )
                     {
                         retValue = retValue.charAt( 0 ) + ":" + retValue.substring( 2 );
                     }
                     else if ( index >= 0 )
                     {
                         // leading / was previously stripped
                         retValue = "/" + retValue;
                     }
                 }
             }
 
             // special case: if there is a windows drive letter using |, switch to :
             if ( retValue.length() >= 2 && retValue.charAt( 1 ) == '|' )
             {
                 retValue = retValue.charAt( 0 ) + ":" + retValue.substring( 2 );
             }
 
             // normalize separators
             retValue = new File( retValue ).getPath();
         }
 
         if ( retValue == null )
         {
             retValue = "/";
         }
         return retValue.trim();
     }
 
     /**
      * Decodes the specified (portion of a) URL. <strong>Note:</strong> This decoder assumes that ISO-8859-1 is used to
      * convert URL-encoded bytes to characters.
      *
      * @param url The URL to decode, may be <code>null</code>.
      * @return The decoded URL or <code>null</code> if the input was <code>null</code>.
      */
     private static String decode( String url )
     {
         String decoded = url;
         if ( url != null )
         {
             int pos = -1;
             while ( ( pos = decoded.indexOf( '%', pos + 1 ) ) >= 0 )
             {
                 if ( pos + 2 < decoded.length() )
                 {
                     String hexStr = decoded.substring( pos + 1, pos + 3 );
                     char ch = (char) Integer.parseInt( hexStr, 16 );
                     decoded = decoded.substring( 0, pos ) + ch + decoded.substring( pos + 3 );
                 }
             }
         }
         return decoded;
     }
 
     public int hashCode()
     {
         final int prime = 31;
         int result = 1;
         result = prime * result + ( ( getId() == null ) ? 0 : getId().hashCode() );
         return result;
     }
 
     public boolean equals( Object obj )
     {
         if ( this == obj )
         {
             return true;
         }
         if ( obj == null )
         {
             return false;
         }
         if ( getClass() != obj.getClass() )
         {
             return false;
         }
 
         ArtifactRepository other = (ArtifactRepository) obj;
 
         return eq( getId(), other.getId() );
     }
 
     protected static <T> boolean eq( T s1, T s2 )
     {
         return s1 != null ? s1.equals( s2 ) : s2 == null;
     }
 
     public Authentication getAuthentication()
     {
         return authentication;
     }
 
     public void setAuthentication( Authentication authentication )
     {
         this.authentication = authentication;
     }
 
     public Proxy getProxy()
     {
         return proxy;
     }
 
     public void setProxy( Proxy proxy )
     {
         this.proxy = proxy;
     }
 
     public boolean isBlacklisted()
     {
         return false;
     }
 
     public void setBlacklisted( boolean blackListed )
     {
         // no op
     }
 
     public boolean isUniqueVersion()
     {
         return true;
     }
 
     public boolean isProjectAware()
     {
         return false;
     }
 
     public List<ArtifactRepository> getMirroredRepositories()
     {
         return mirroredRepositories;
     }
 
     public void setMirroredRepositories( List<ArtifactRepository> mirroredRepositories )
     {
         if ( mirroredRepositories != null )
         {
             this.mirroredRepositories = Collections.unmodifiableList( mirroredRepositories );
         }
         else
         {
             this.mirroredRepositories = Collections.emptyList();
         }
     }
 
 }