/*
    * 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 javax.inject.Inject;
  import javax.inject.Named;
  import javax.inject.Singleton;
  
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.URI;
  import java.nio.file.Path;
  import java.util.Collection;
  import java.util.List;
  import java.util.Optional;
  
  import org.apache.maven.api.Project;
  import org.apache.maven.api.annotations.Nonnull;
  import org.apache.maven.api.services.BuilderProblem;
  import org.apache.maven.api.services.DependencyResolverResult;
  import org.apache.maven.api.services.ProjectBuilder;
  import org.apache.maven.api.services.ProjectBuilderException;
  import org.apache.maven.api.services.ProjectBuilderRequest;
  import org.apache.maven.api.services.ProjectBuilderResult;
  import org.apache.maven.api.services.Source;
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.model.building.ModelProblem;
  import org.apache.maven.model.building.ModelSource2;
  import org.apache.maven.project.DefaultProjectBuildingRequest;
  import org.apache.maven.project.ProjectBuildingException;
  import org.apache.maven.project.ProjectBuildingRequest;
  import org.apache.maven.project.ProjectBuildingResult;
  
  @Named
  @Singleton
  public class DefaultProjectBuilder implements ProjectBuilder {
  
      private final org.apache.maven.project.ProjectBuilder builder;
  
      @Inject
      public DefaultProjectBuilder(org.apache.maven.project.ProjectBuilder builder) {
          this.builder = builder;
      }
  
      @SuppressWarnings("MethodLength")
      @Nonnull
      @Override
      public ProjectBuilderResult build(ProjectBuilderRequest request)
              throws ProjectBuilderException, IllegalArgumentException {
          InternalMavenSession session = InternalMavenSession.from(request.getSession());
          try {
              List<ArtifactRepository> repositories = session.toArtifactRepositories(session.getRemoteRepositories());
              ProjectBuildingRequest req = new DefaultProjectBuildingRequest()
                      .setRepositorySession(session.getSession())
                      .setRemoteRepositories(repositories)
                      .setPluginArtifactRepositories(repositories)
                      .setProcessPlugins(request.isProcessPlugins());
              ProjectBuildingResult res;
              if (request.getPath().isPresent()) {
                  Path path = request.getPath().get();
                  res = builder.build(path.toFile(), req);
              } else if (request.getSource().isPresent()) {
                  Source source = request.getSource().get();
                  ModelSource2 modelSource = new SourceWrapper(source);
                  res = builder.build(modelSource, req);
              } else {
                  throw new IllegalArgumentException("Invalid request");
              }
              return new ProjectBuilderResult() {
                  @Nonnull
                  @Override
                  public String getProjectId() {
                      return res.getProjectId();
                  }
  
                  @Nonnull
                  @Override
                  public Optional<Path> getPomFile() {
                      return Optional.ofNullable(res.getPomFile()).map(File::toPath);
                  }
  
                  @Nonnull
                 @Override
                 public Optional<Project> getProject() {
                     return Optional.ofNullable(res.getProject()).map(session::getProject);
                 }
 
                 @Nonnull
                 @Override
                 public Collection<BuilderProblem> getProblems() {
                     return new MappedCollection<>(res.getProblems(), this::toProblem);
                 }
 
                 private BuilderProblem toProblem(ModelProblem problem) {
                     return new BuilderProblem() {
                         @Override
                         public String getSource() {
                             return problem.getSource();
                         }
 
                         @Override
                         public int getLineNumber() {
                             return problem.getLineNumber();
                         }
 
                         @Override
                         public int getColumnNumber() {
                             return problem.getColumnNumber();
                         }
 
                         @Override
                         public String getLocation() {
                             StringBuilder buffer = new StringBuilder(256);
 
                             if (!getSource().isEmpty()) {
                                 buffer.append(getSource());
                             }
 
                             if (getLineNumber() > 0) {
                                 if (buffer.length() > 0) {
                                     buffer.append(", ");
                                 }
                                 buffer.append("line ").append(getLineNumber());
                             }
 
                             if (getColumnNumber() > 0) {
                                 if (buffer.length() > 0) {
                                     buffer.append(", ");
                                 }
                                 buffer.append("column ").append(getColumnNumber());
                             }
 
                             return buffer.toString();
                         }
 
                         @Override
                         public Exception getException() {
                             return problem.getException();
                         }
 
                         @Override
                         public String getMessage() {
                             return problem.getMessage();
                         }
 
                         @Override
                         public Severity getSeverity() {
                             return Severity.valueOf(problem.getSeverity().name());
                         }
                     };
                 }
 
                 @Nonnull
                 @Override
                 public Optional<DependencyResolverResult> getDependencyResolverResult() {
                     return Optional.ofNullable(res.getDependencyResolutionResult())
                             .map(r -> new DefaultDependencyResolverResult(
                                     null, r.getCollectionErrors(), session.getNode(r.getDependencyGraph()), 0));
                 }
             };
         } catch (ProjectBuildingException e) {
             throw new ProjectBuilderException("Unable to build project", e);
         }
     }
 
     private static class SourceWrapper implements ModelSource2 {
         private final Source source;
 
         SourceWrapper(Source source) {
             this.source = source;
         }
 
         @Override
         public InputStream getInputStream() throws IOException {
             return source.openStream();
         }
 
         @Override
         public String getLocation() {
             return source.getLocation();
         }
 
         @Override
         public ModelSource2 getRelatedSource(String relPath) {
             Source rel = source.resolve(relPath);
             return rel != null ? new SourceWrapper(rel) : null;
         }
 
         @Override
         public URI getLocationURI() {
             Path path = source.getPath();
             return path != null ? path.toUri() : URI.create(source.getLocation());
         }
     }
 }