/*
    * 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.io.File;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Date;
  import java.util.LinkedHashMap;
  import java.util.Map;
  
  import org.apache.maven.artifact.repository.metadata.Metadata;
  import org.apache.maven.artifact.repository.metadata.Snapshot;
  import org.apache.maven.artifact.repository.metadata.SnapshotVersion;
  import org.apache.maven.artifact.repository.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<>();
  
      private final boolean legacyFormat;
  
      LocalSnapshotMetadata(Artifact artifact, boolean legacyFormat, Date timestamp) {
          super(createMetadata(artifact, legacyFormat), null, timestamp);
          this.legacyFormat = legacyFormat;
      }
  
      LocalSnapshotMetadata(Metadata metadata, File file, boolean legacyFormat, Date timestamp) {
          super(metadata, file, timestamp);
          this.legacyFormat = legacyFormat;
      }
  
      private static Metadata createMetadata(Artifact artifact, boolean legacyFormat) {
          Snapshot snapshot = new Snapshot();
          snapshot.setLocalCopy(true);
          Versioning versioning = new Versioning();
          versioning.setSnapshot(snapshot);
  
          Metadata metadata = new Metadata();
          metadata.setVersioning(versioning);
          metadata.setGroupId(artifact.getGroupId());
          metadata.setArtifactId(artifact.getArtifactId());
          metadata.setVersion(artifact.getBaseVersion());
  
          if (!legacyFormat) {
              metadata.setModelVersion("1.1.0");
          }
  
          return metadata;
      }
  
      public void bind(Artifact artifact) {
          artifacts.add(artifact);
      }
  
      @Override
      public MavenMetadata setFile(File file) {
          return new LocalSnapshotMetadata(metadata, file, legacyFormat, 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.getVersioning().setLastUpdatedTimestamp(timestamp);
  
          if (!legacyFormat) {
              String lastUpdated = metadata.getVersioning().getLastUpdated();
  
              Map<String, SnapshotVersion> versions = new LinkedHashMap<>();
  
              for (Artifact artifact : artifacts) {
                  SnapshotVersion sv = new SnapshotVersion();
                 sv.setClassifier(artifact.getClassifier());
                 sv.setExtension(artifact.getExtension());
                 sv.setVersion(getVersion());
                 sv.setUpdated(lastUpdated);
                 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.getVersioning().setSnapshotVersions(new ArrayList<>(versions.values()));
         }
         // just carry-on as-is
         if (!recessive.getPlugins().isEmpty()) {
             metadata.setPlugins(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;
     }
 }