/*
    * 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.Date;
  import java.util.LinkedHashMap;
  import java.util.List;
  
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.annotations.Nullable;
  import org.apache.maven.api.metadata.Metadata;
  import org.apache.maven.api.metadata.Plugin;
  
  /**
   * Maven G level metadata.
   */
  final class PluginsMetadata extends MavenMetadata {
      static final class PluginInfo {
          @Nonnull
          final String groupId;
  
          @Nonnull
          private final String artifactId;
  
          @Nullable
          private final String goalPrefix;
  
          @Nullable
          private final String name;
  
          PluginInfo(String groupId, String artifactId, String goalPrefix, String name) {
              this.groupId = groupId;
              this.artifactId = artifactId;
              this.goalPrefix = goalPrefix;
              this.name = name;
          }
      }
  
      private final PluginInfo pluginInfo;
  
      PluginsMetadata(PluginInfo pluginInfo, Date timestamp) {
          super(createRepositoryMetadata(pluginInfo), (Path) null, timestamp);
          this.pluginInfo = pluginInfo;
      }
  
      PluginsMetadata(PluginInfo pluginInfo, Path path, Date timestamp) {
          super(createRepositoryMetadata(pluginInfo), path, timestamp);
          this.pluginInfo = pluginInfo;
      }
  
      private static Metadata createRepositoryMetadata(PluginInfo pluginInfo) {
          return Metadata.newBuilder()
                  .plugins(List.of(Plugin.newBuilder()
                          .prefix(pluginInfo.goalPrefix)
                          .artifactId(pluginInfo.artifactId)
                          .name(pluginInfo.name)
                          .build()))
                  .build();
      }
  
      @Override
      protected void merge(Metadata recessive) {
          List<Plugin> recessivePlugins = recessive.getPlugins();
          List<Plugin> plugins = metadata.getPlugins();
          if (!recessivePlugins.isEmpty() || !plugins.isEmpty()) {
              LinkedHashMap<String, Plugin> mergedPlugins = new LinkedHashMap<>();
              recessivePlugins.forEach(p -> mergedPlugins.put(p.getPrefix(), p));
              plugins.forEach(p -> mergedPlugins.put(p.getPrefix(), p));
              metadata = metadata.withPlugins(mergedPlugins.values());
          }
          // just carry-on as-is
          if (recessive.getVersioning() != null) {
              metadata = metadata.withVersioning(recessive.getVersioning());
          }
      }
  
      @Deprecated
      @Override
      public MavenMetadata setFile(File file) {
          return new PluginsMetadata(pluginInfo, file.toPath(), timestamp);
      }
 
     @Override
     public MavenMetadata setPath(Path path) {
         return new PluginsMetadata(pluginInfo, path, timestamp);
     }
 
     @Override
     public String getGroupId() {
         return pluginInfo.groupId;
     }
 
     @Override
     public String getArtifactId() {
         return "";
     }
 
     @Override
     public String getVersion() {
         return "";
     }
 
     @Override
     public Nature getNature() {
         return Nature.RELEASE_OR_SNAPSHOT;
     }
 }