/*
    * 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.internal.impl.resolver;
  
  import java.io.File;
  import java.nio.file.Path;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Date;
  import java.util.LinkedHashSet;
  import java.util.List;
  
  import org.apache.maven.api.metadata.Metadata;
  import org.apache.maven.api.metadata.Versioning;
  import org.eclipse.aether.artifact.Artifact;
  import org.eclipse.aether.artifact.ArtifactProperties;
  
  /**
   * Maven GA level metadata.
   */
  final class VersionsMetadata extends MavenMetadata {
  
      private final Artifact artifact;
  
      VersionsMetadata(Artifact artifact, Date timestamp) {
          super(createRepositoryMetadata(artifact), (Path) null, timestamp);
          this.artifact = artifact;
      }
  
      VersionsMetadata(Artifact artifact, Path path, Date timestamp) {
          super(createRepositoryMetadata(artifact), path, timestamp);
          this.artifact = artifact;
      }
  
      private static Metadata createRepositoryMetadata(Artifact artifact) {
  
          Metadata.Builder metadata = Metadata.newBuilder();
          metadata.groupId(artifact.getGroupId());
          metadata.artifactId(artifact.getArtifactId());
  
          Versioning.Builder versioning = Versioning.newBuilder();
          versioning.versions(List.of(artifact.getBaseVersion()));
          if (!artifact.isSnapshot()) {
              versioning.release(artifact.getBaseVersion());
          }
          if ("maven-plugin".equals(artifact.getProperty(ArtifactProperties.TYPE, ""))) {
              versioning.latest(artifact.getBaseVersion());
          }
  
          metadata.versioning(versioning.build());
  
          return metadata.build();
      }
  
      @Override
      protected void merge(Metadata recessive) {
          Versioning original = metadata.getVersioning();
  
          Versioning.Builder versioning = Versioning.newBuilder(original);
          versioning.lastUpdated(fmt.format(timestamp));
  
          if (recessive.getVersioning() != null) {
              if (original.getLatest() == null) {
                  versioning.latest(recessive.getVersioning().getLatest());
              }
              if (original.getRelease() == null) {
                  versioning.release(recessive.getVersioning().getRelease());
              }
  
              Collection<String> versions =
                      new LinkedHashSet<>(recessive.getVersioning().getVersions());
              versions.addAll(original.getVersions());
              versioning.versions(new ArrayList<>(versions));
          }
  
          metadata = metadata.withVersioning(versioning.build());
  
          // just carry-on as-is
          if (recessive.getPlugins() != null && !recessive.getPlugins().isEmpty()) {
              metadata = metadata.withPlugins(new ArrayList<>(recessive.getPlugins()));
          }
      }
  
     public Object getKey() {
         return getGroupId() + ':' + getArtifactId();
     }
 
     public static Object getKey(Artifact artifact) {
         return artifact.getGroupId() + ':' + artifact.getArtifactId();
     }
 
     @Deprecated
     @Override
     public MavenMetadata setFile(File file) {
         return new VersionsMetadata(artifact, file.toPath(), timestamp);
     }
 
     @Override
     public MavenMetadata setPath(Path path) {
         return new VersionsMetadata(artifact, path, timestamp);
     }
 
     @Override
     public String getGroupId() {
         return artifact.getGroupId();
     }
 
     @Override
     public String getArtifactId() {
         return artifact.getArtifactId();
     }
 
     @Override
     public String getVersion() {
         return "";
     }
 
     @Override
     public Nature getNature() {
         return artifact.isSnapshot() ? Nature.RELEASE_OR_SNAPSHOT : Nature.RELEASE;
     }
 }