/*
    * 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.
   */
  package org.apache.maven.project;
  
  import java.io.File;
  
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.metadata.Metadata;
  import org.eclipse.aether.repository.LocalArtifactRegistration;
  import org.eclipse.aether.repository.LocalArtifactRequest;
  import org.eclipse.aether.repository.LocalArtifactResult;
  import org.eclipse.aether.repository.LocalMetadataRegistration;
  import org.eclipse.aether.repository.LocalMetadataRequest;
  import org.eclipse.aether.repository.LocalMetadataResult;
  import org.eclipse.aether.repository.LocalRepository;
  import org.eclipse.aether.repository.LocalRepositoryManager;
  import org.eclipse.aether.repository.RemoteRepository;
  
  /**
   * @author Benjamin Bentmann
   */
  public class LegacyLocalRepositoryManager implements LocalRepositoryManager {
  
      private final LocalRepository repository;
  
      public LegacyLocalRepositoryManager(File basedir) {
          this.repository = new LocalRepository(basedir.getAbsoluteFile(), "legacy");
      }
  
      public LocalRepository getRepository() {
          return repository;
      }
  
      public String getPathForLocalArtifact(Artifact artifact) {
          StringBuilder path = new StringBuilder(128);
  
          path.append(artifact.getGroupId()).append('/');
  
          path.append(artifact.getExtension()).append("s/");
  
          path.append(artifact.getArtifactId()).append('-').append(artifact.getVersion());
  
          if (artifact.getClassifier().length() > 0) {
              path.append('-').append(artifact.getClassifier());
          }
  
          path.append('.').append(artifact.getExtension());
  
          return path.toString();
      }
  
      public String getPathForRemoteArtifact(Artifact artifact, RemoteRepository repository, String context) {
          return getPathForLocalArtifact(artifact);
      }
  
      public String getPathForLocalMetadata(Metadata metadata) {
          return getPath(metadata, "local");
      }
  
      public String getPathForRemoteMetadata(Metadata metadata, RemoteRepository repository, String context) {
          return getPath(metadata, getRepositoryKey(repository, context));
      }
  
      String getRepositoryKey(RemoteRepository repository, String context) {
          return repository.getId();
      }
  
      private String getPath(Metadata metadata, String repositoryKey) {
          StringBuilder path = new StringBuilder(128);
  
          if (metadata.getGroupId().length() > 0) {
              path.append(metadata.getGroupId().replace('.', '/')).append('/');
  
              if (metadata.getArtifactId().length() > 0) {
                  path.append(metadata.getArtifactId()).append('/');
  
                  if (metadata.getVersion().length() > 0) {
                      path.append(metadata.getVersion()).append('/');
                  }
              }
          }
  
         path.append(insertRepositoryKey(metadata.getType(), repositoryKey));
 
         return path.toString();
     }
 
     private String insertRepositoryKey(String filename, String repositoryKey) {
         String result;
         int idx = filename.indexOf('.');
         if (idx < 0) {
             result = filename + '-' + repositoryKey;
         } else {
             result = filename.substring(0, idx) + '-' + repositoryKey + filename.substring(idx);
         }
         return result;
     }
 
     public LocalArtifactResult find(RepositorySystemSession session, LocalArtifactRequest request) {
         String path = getPathForLocalArtifact(request.getArtifact());
         File file = new File(getRepository().getBasedir(), path);
 
         LocalArtifactResult result = new LocalArtifactResult(request);
         if (file.isFile()) {
             result.setFile(file);
             result.setAvailable(true);
         }
 
         return result;
     }
 
     public void add(RepositorySystemSession session, LocalArtifactRegistration request) {
         // noop
     }
 
     public LocalMetadataResult find(RepositorySystemSession session, LocalMetadataRequest request) {
         LocalMetadataResult result = new LocalMetadataResult(request);
 
         String path;
 
         Metadata metadata = request.getMetadata();
         String context = request.getContext();
         RemoteRepository remote = request.getRepository();
 
         if (remote != null) {
             path = getPathForRemoteMetadata(metadata, remote, context);
         } else {
             path = getPathForLocalMetadata(metadata);
         }
 
         File file = new File(getRepository().getBasedir(), path);
         if (file.isFile()) {
             result.setFile(file);
         }
 
         return result;
     }
 
     public void add(RepositorySystemSession session, LocalMetadataRegistration request) {
         // noop
     }
 
     public String toString() {
         return String.valueOf(getRepository());
     }
 }