/*
    * 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.util.Arrays;
  import java.util.function.Supplier;
  
  import org.apache.maven.api.DependencyScope;
  import org.apache.maven.repository.internal.artifact.FatArtifactTraverser;
  import org.apache.maven.repository.internal.scopes.Maven4ScopeManagerConfiguration;
  import org.apache.maven.repository.internal.type.DefaultTypeProvider;
  import org.eclipse.aether.RepositorySystem;
  import org.eclipse.aether.RepositorySystemSession.CloseableSession;
  import org.eclipse.aether.RepositorySystemSession.SessionBuilder;
  import org.eclipse.aether.artifact.ArtifactTypeRegistry;
  import org.eclipse.aether.collection.DependencyGraphTransformer;
  import org.eclipse.aether.collection.DependencyManager;
  import org.eclipse.aether.collection.DependencySelector;
  import org.eclipse.aether.collection.DependencyTraverser;
  import org.eclipse.aether.impl.scope.InternalScopeManager;
  import org.eclipse.aether.internal.impl.scope.ManagedDependencyContextRefiner;
  import org.eclipse.aether.internal.impl.scope.ManagedScopeDeriver;
  import org.eclipse.aether.internal.impl.scope.ManagedScopeSelector;
  import org.eclipse.aether.internal.impl.scope.OptionalDependencySelector;
  import org.eclipse.aether.internal.impl.scope.ScopeDependencySelector;
  import org.eclipse.aether.internal.impl.scope.ScopeManagerImpl;
  import org.eclipse.aether.resolution.ArtifactDescriptorPolicy;
  import org.eclipse.aether.util.artifact.DefaultArtifactTypeRegistry;
  import org.eclipse.aether.util.graph.manager.ClassicDependencyManager;
  import org.eclipse.aether.util.graph.selector.AndDependencySelector;
  import org.eclipse.aether.util.graph.selector.ExclusionDependencySelector;
  import org.eclipse.aether.util.graph.transformer.ChainedDependencyGraphTransformer;
  import org.eclipse.aether.util.graph.transformer.ConflictResolver;
  import org.eclipse.aether.util.graph.transformer.NearestVersionSelector;
  import org.eclipse.aether.util.graph.transformer.SimpleOptionalitySelector;
  import org.eclipse.aether.util.repository.SimpleArtifactDescriptorPolicy;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * A simple {@link Supplier} of {@link SessionBuilder} instances, that on each call supplies newly
   * constructed instance. To create session out of builder, use {@link SessionBuilder#build()}. For proper closing
   * of sessions, use {@link CloseableSession#close()} method on built instance(s).
   * <p>
   * Extend this class and override methods to customize, if needed.
   *
   * @since 4.0.0
   */
  public class MavenSessionBuilderSupplier implements Supplier<SessionBuilder> {
      protected final RepositorySystem repositorySystem;
      protected final InternalScopeManager scopeManager;
  
      public MavenSessionBuilderSupplier(RepositorySystem repositorySystem) {
          this.repositorySystem = requireNonNull(repositorySystem);
          this.scopeManager = new ScopeManagerImpl(Maven4ScopeManagerConfiguration.INSTANCE);
      }
  
      /**
       * Package protected constructor, only for use with {@link MavenRepositorySystemUtils}.
       */
      @Deprecated
      MavenSessionBuilderSupplier() {
          this.repositorySystem = null;
          this.scopeManager = new ScopeManagerImpl(Maven4ScopeManagerConfiguration.INSTANCE);
      }
  
      protected InternalScopeManager getScopeManager() {
          return scopeManager;
      }
  
      protected DependencyTraverser getDependencyTraverser() {
          return new FatArtifactTraverser();
      }
  
      protected DependencyManager getDependencyManager() {
          return getDependencyManager(true); // same default as in Maven4
      }
  
      public DependencyManager getDependencyManager(boolean transitive) {
          return new ClassicDependencyManager(transitive, getScopeManager());
      }
  
      protected DependencySelector getDependencySelector() {
         return new AndDependencySelector(
                 ScopeDependencySelector.legacy(
                         null, Arrays.asList(DependencyScope.TEST.id(), DependencyScope.PROVIDED.id())),
                 OptionalDependencySelector.fromDirect(),
                 new ExclusionDependencySelector());
     }
 
     protected DependencyGraphTransformer getDependencyGraphTransformer() {
         return new ChainedDependencyGraphTransformer(
                 new ConflictResolver(
                         new NearestVersionSelector(), new ManagedScopeSelector(getScopeManager()),
                         new SimpleOptionalitySelector(), new ManagedScopeDeriver(getScopeManager())),
                 new ManagedDependencyContextRefiner(getScopeManager()));
     }
 
     /**
      * This method produces "surrogate" type registry that is static: it aims users that want to use
      * Maven-Resolver without involving Maven Core and related things.
      * <p>
      * This type registry is NOT used by Maven Core: Maven replaces it during Session creation with a type registry
      * that supports extending it (i.e. via Maven Extensions).
      * <p>
      * Important: this "static" list of types should be in-sync with core provided types.
      */
     protected ArtifactTypeRegistry getArtifactTypeRegistry() {
         DefaultArtifactTypeRegistry stereotypes = new DefaultArtifactTypeRegistry();
         new DefaultTypeProvider().types().forEach(stereotypes::add);
         return stereotypes;
     }
 
     protected ArtifactDescriptorPolicy getArtifactDescriptorPolicy() {
         return new SimpleArtifactDescriptorPolicy(true, true);
     }
 
     protected void configureSessionBuilder(SessionBuilder session) {
         session.setDependencyTraverser(getDependencyTraverser());
         session.setDependencyManager(getDependencyManager());
         session.setDependencySelector(getDependencySelector());
         session.setDependencyGraphTransformer(getDependencyGraphTransformer());
         session.setArtifactTypeRegistry(getArtifactTypeRegistry());
         session.setArtifactDescriptorPolicy(getArtifactDescriptorPolicy());
         session.setScopeManager(getScopeManager());
     }
 
     /**
      * Creates a new Maven-like repository system session by initializing the session with values typical for
      * Maven-based resolution. In more detail, this method configures settings relevant for the processing of dependency
      * graphs, most other settings remain at their generic default value. Use the various setters to further configure
      * the session with authentication, mirror, proxy and other information required for your environment. At least,
      * local repository manager needs to be configured to make session be able to create session instance.
      *
      * @return SessionBuilder configured with minimally required things for "Maven-based resolution". At least LRM must
      * be set on builder to make it able to create session instances.
      */
     @Override
     public SessionBuilder get() {
         requireNonNull(repositorySystem, "repositorySystem");
         SessionBuilder builder = repositorySystem.createSessionBuilder();
         configureSessionBuilder(builder);
         return builder;
     }
 }