/*
    * 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;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Objects;
  import java.util.Optional;
  
  import org.apache.maven.api.Artifact;
  import org.apache.maven.api.Dependency;
  import org.apache.maven.api.Node;
  import org.apache.maven.api.RemoteRepository;
  import org.apache.maven.api.annotations.Nonnull;
  import org.eclipse.aether.graph.DependencyNode;
  import org.eclipse.aether.util.graph.manager.DependencyManagerUtils;
  import org.eclipse.aether.util.graph.transformer.ConflictResolver;
  
  public class DefaultNode extends AbstractNode {
  
      protected final @Nonnull InternalSession session;
      protected final @Nonnull org.eclipse.aether.graph.DependencyNode node;
      protected final boolean verbose;
  
      public DefaultNode(
              @Nonnull InternalSession session, @Nonnull org.eclipse.aether.graph.DependencyNode node, boolean verbose) {
          this.session = session;
          this.node = node;
          this.verbose = verbose;
      }
  
      @Override
      DependencyNode getDependencyNode() {
          return node;
      }
  
      @Override
      public Artifact getArtifact() {
          return node.getArtifact() != null ? session.getArtifact(node.getArtifact()) : null;
      }
  
      @Override
      public Dependency getDependency() {
          return node.getDependency() != null ? session.getDependency(node.getDependency()) : null;
      }
  
      @Override
      public List<Node> getChildren() {
          return new MappedList<>(node.getChildren(), n -> session.getNode(n, verbose));
      }
  
      @Override
      public List<RemoteRepository> getRemoteRepositories() {
          return new MappedList<>(node.getRepositories(), session::getRemoteRepository);
      }
  
      @Override
      public Optional<RemoteRepository> getRepository() {
          // TODO: v4: implement
          throw new UnsupportedOperationException("Not implemented yet");
      }
  
      @Override
      public String asString() {
          String nodeString = super.asString();
  
          if (!verbose) {
              return nodeString;
          }
  
          org.eclipse.aether.graph.DependencyNode node = getDependencyNode();
  
          List<String> details = new ArrayList<>();
  
          org.eclipse.aether.graph.DependencyNode winner =
                  (org.eclipse.aether.graph.DependencyNode) node.getData().get(ConflictResolver.NODE_DATA_WINNER);
          String winnerVersion = winner != null ? winner.getArtifact().getBaseVersion() : null;
          boolean included = (winnerVersion == null);
  
          String preManagedVersion = DependencyManagerUtils.getPremanagedVersion(node);
          if (preManagedVersion != null) {
              details.add("version managed from " + preManagedVersion);
          }
 
         String preManagedScope = DependencyManagerUtils.getPremanagedScope(node);
         if (preManagedScope != null) {
             details.add("scope managed from " + preManagedScope);
         }
 
         String originalScope = (String) node.getData().get(ConflictResolver.NODE_DATA_ORIGINAL_SCOPE);
         if (originalScope != null && !originalScope.equals(node.getDependency().getScope())) {
             details.add("scope updated from " + originalScope);
         }
 
         if (!included) {
             if (Objects.equals(winnerVersion, node.getArtifact().getVersion())) {
                 details.add("omitted for duplicate");
             } else {
                 details.add("omitted for conflict with " + winnerVersion);
             }
         }
 
         StringBuilder buffer = new StringBuilder();
         if (included) {
             buffer.append(nodeString);
             if (!details.isEmpty()) {
                 buffer.append(" (");
                 join(buffer, details, "; ");
                 buffer.append(")");
             }
         } else {
             buffer.append("(");
             buffer.append(nodeString);
             if (!details.isEmpty()) {
                 buffer.append(" - ");
                 join(buffer, details, "; ");
             }
             buffer.append(")");
         }
         return buffer.toString();
     }
 
     private static void join(StringBuilder buffer, List<String> details, String separator) {
         boolean first = true;
         for (String detail : details) {
             if (first) {
                 first = false;
             } else {
                 buffer.append(separator);
             }
             buffer.append(detail);
         }
     }
 }