/*
    * 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.LinkedHashMap;
  import java.util.Map;
  
  import org.apache.maven.api.metadata.Metadata;
  import org.apache.maven.api.metadata.Snapshot;
  import org.apache.maven.api.metadata.SnapshotVersion;
  import org.apache.maven.api.metadata.Versioning;
  import org.eclipse.aether.artifact.Artifact;
  
  /**
   * Maven local GAV level metadata.
   */
  final class LocalSnapshotMetadata extends MavenMetadata {
  
      private final Collection<Artifact> artifacts = new ArrayList<>();
  
      LocalSnapshotMetadata(Artifact artifact, Date timestamp) {
          super(createMetadata(artifact), (Path) null, timestamp);
      }
  
      LocalSnapshotMetadata(Metadata metadata, Path path, Date timestamp) {
          super(metadata, path, timestamp);
      }
  
      private static Metadata createMetadata(Artifact artifact) {
          Snapshot snapshot = Snapshot.newBuilder().localCopy(true).build();
          Versioning versioning = Versioning.newBuilder().snapshot(snapshot).build();
          Metadata metadata = Metadata.newBuilder()
                  .versioning(versioning)
                  .groupId(artifact.getGroupId())
                  .artifactId(artifact.getArtifactId())
                  .version(artifact.getBaseVersion())
                  .modelVersion("1.1.0")
                  .build();
          return metadata;
      }
  
      public void bind(Artifact artifact) {
          artifacts.add(artifact);
      }
  
      @Deprecated
      @Override
      public MavenMetadata setFile(File file) {
          return new LocalSnapshotMetadata(metadata, file.toPath(), timestamp);
      }
  
      @Override
      public MavenMetadata setPath(Path path) {
          return new LocalSnapshotMetadata(metadata, path, timestamp);
      }
  
      public Object getKey() {
          return getGroupId() + ':' + getArtifactId() + ':' + getVersion();
      }
  
      public static Object getKey(Artifact artifact) {
          return artifact.getGroupId() + ':' + artifact.getArtifactId() + ':' + artifact.getBaseVersion();
      }
  
      @Override
      protected void merge(Metadata recessive) {
          metadata = metadata.withVersioning(metadata.getVersioning().withLastUpdated(fmt.format(timestamp)));
  
          String lastUpdated = metadata.getVersioning().getLastUpdated();
  
          Map<String, SnapshotVersion> versions = new LinkedHashMap<>();
  
          for (Artifact artifact : artifacts) {
              SnapshotVersion sv = SnapshotVersion.newBuilder()
                      .classifier(artifact.getClassifier())
                      .extension(artifact.getExtension())
                      .version(getVersion())
                      .updated(lastUpdated)
                     .build();
             versions.put(getKey(sv.getClassifier(), sv.getExtension()), sv);
         }
 
         Versioning versioning = recessive.getVersioning();
         if (versioning != null) {
             for (SnapshotVersion sv : versioning.getSnapshotVersions()) {
                 String key = getKey(sv.getClassifier(), sv.getExtension());
                 if (!versions.containsKey(key)) {
                     versions.put(key, sv);
                 }
             }
         }
 
         metadata = metadata.withVersioning(metadata.getVersioning().withSnapshotVersions(versions.values()));
 
         // just carry-on as-is
         if (recessive.getPlugins() != null && !recessive.getPlugins().isEmpty()) {
             metadata = metadata.withPlugins(new ArrayList<>(recessive.getPlugins()));
         }
 
         artifacts.clear();
     }
 
     private String getKey(String classifier, String extension) {
         return classifier + ':' + extension;
     }
 
     @Override
     public String getGroupId() {
         return metadata.getGroupId();
     }
 
     @Override
     public String getArtifactId() {
         return metadata.getArtifactId();
     }
 
     @Override
     public String getVersion() {
         return metadata.getVersion();
     }
 
     @Override
     public Nature getNature() {
         return Nature.SNAPSHOT;
     }
 }