/*
    * 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.repository.internal;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.maven.api.Language;
  import org.apache.maven.model.DependencyManagement;
  import org.apache.maven.model.DistributionManagement;
  import org.apache.maven.model.License;
  import org.apache.maven.model.Model;
  import org.apache.maven.model.Prerequisites;
  import org.apache.maven.model.Repository;
  import org.apache.maven.repository.internal.artifact.MavenArtifactProperties;
  import org.apache.maven.repository.internal.type.DefaultType;
  import org.eclipse.aether.RepositorySystemSession;
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.artifact.ArtifactProperties;
  import org.eclipse.aether.artifact.ArtifactType;
  import org.eclipse.aether.artifact.ArtifactTypeRegistry;
  import org.eclipse.aether.artifact.DefaultArtifact;
  import org.eclipse.aether.graph.Dependency;
  import org.eclipse.aether.graph.Exclusion;
  import org.eclipse.aether.resolution.ArtifactDescriptorResult;
  
  /**
   * Populates Aether {@link ArtifactDescriptorResult} from Maven project {@link Model}.
   * <p>
   * <strong>Note:</strong> This class is part of work in progress and can be changed or removed without notice.
   * @since 3.2.4
   */
  public class ArtifactDescriptorReaderDelegate {
      public void populateResult(RepositorySystemSession session, ArtifactDescriptorResult result, Model model) {
          ArtifactTypeRegistry stereotypes = session.getArtifactTypeRegistry();
  
          for (Repository r : model.getRepositories()) {
              result.addRepository(ArtifactDescriptorUtils.toRemoteRepository(r));
          }
  
          for (org.apache.maven.model.Dependency dependency : model.getDependencies()) {
              result.addDependency(convert(dependency, stereotypes));
          }
  
          DependencyManagement mgmt = model.getDependencyManagement();
          if (mgmt != null) {
              for (org.apache.maven.model.Dependency dependency : mgmt.getDependencies()) {
                  result.addManagedDependency(convert(dependency, stereotypes));
              }
          }
  
          Map<String, Object> properties = new LinkedHashMap<>();
  
          Prerequisites prerequisites = model.getPrerequisites();
          if (prerequisites != null) {
              properties.put("prerequisites.maven", prerequisites.getMaven());
          }
  
          List<License> licenses = model.getLicenses();
          properties.put("license.count", licenses.size());
          for (int i = 0; i < licenses.size(); i++) {
              License license = licenses.get(i);
              properties.put("license." + i + ".name", license.getName());
              properties.put("license." + i + ".url", license.getUrl());
              properties.put("license." + i + ".comments", license.getComments());
              properties.put("license." + i + ".distribution", license.getDistribution());
          }
  
          result.setProperties(properties);
  
          setArtifactProperties(result, model);
      }
  
      private Dependency convert(org.apache.maven.model.Dependency dependency, ArtifactTypeRegistry stereotypes) {
          ArtifactType stereotype = stereotypes.get(dependency.getType());
          if (stereotype == null) {
              // TODO: this here is fishy
              stereotype = new DefaultType(dependency.getType(), Language.NONE, "", null, false);
          }
 
         boolean system = dependency.getSystemPath() != null
                 && !dependency.getSystemPath().isEmpty();
 
         Map<String, String> props = null;
         if (system) {
             props = Collections.singletonMap(MavenArtifactProperties.LOCAL_PATH, dependency.getSystemPath());
         }
 
         Artifact artifact = new DefaultArtifact(
                 dependency.getGroupId(),
                 dependency.getArtifactId(),
                 dependency.getClassifier(),
                 null,
                 dependency.getVersion(),
                 props,
                 stereotype);
 
         List<Exclusion> exclusions = new ArrayList<>(dependency.getExclusions().size());
         for (org.apache.maven.model.Exclusion exclusion : dependency.getExclusions()) {
             exclusions.add(convert(exclusion));
         }
 
         return new Dependency(
                 artifact,
                 dependency.getScope(),
                 dependency.getOptional() != null ? dependency.isOptional() : null,
                 exclusions);
     }
 
     private Exclusion convert(org.apache.maven.model.Exclusion exclusion) {
         return new Exclusion(exclusion.getGroupId(), exclusion.getArtifactId(), "*", "*");
     }
 
     private void setArtifactProperties(ArtifactDescriptorResult result, Model model) {
         String downloadUrl = null;
         DistributionManagement distMgmt = model.getDistributionManagement();
         if (distMgmt != null) {
             downloadUrl = distMgmt.getDownloadUrl();
         }
         if (downloadUrl != null && !downloadUrl.isEmpty()) {
             Artifact artifact = result.getArtifact();
             Map<String, String> props = new HashMap<>(artifact.getProperties());
             props.put(ArtifactProperties.DOWNLOAD_URL, downloadUrl);
             result.setArtifact(artifact.setProperties(props));
         }
     }
 }