/*
    * 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.plugins.assembly.archive;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Collections;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.maven.archiver.MavenArchiveConfiguration;
  import org.apache.maven.archiver.MavenArchiver;
  import org.apache.maven.artifact.DependencyResolutionRequiredException;
  import org.apache.maven.execution.MavenSession;
  import org.apache.maven.project.MavenProject;
  import org.codehaus.plexus.archiver.AbstractArchiveFinalizer;
  import org.codehaus.plexus.archiver.Archiver;
  import org.codehaus.plexus.archiver.ArchiverException;
  import org.codehaus.plexus.archiver.jar.JarArchiver;
  import org.codehaus.plexus.archiver.jar.Manifest;
  import org.codehaus.plexus.archiver.jar.ManifestException;
  
  /**
   *
   */
  public class ManifestCreationFinalizer extends AbstractArchiveFinalizer {
  
      private final MavenProject project;
  
      private final MavenSession session;
  
      private final MavenArchiveConfiguration archiveConfiguration;
  
      // TODO: I'd really prefer to rewrite MavenArchiver as either a
      // separate manifest creation utility (and to
      // create an include pom.properties etc into another archiver), or
      // an implementation of an archiver
      // (the first is preferable).
      private final MavenArchiver mavenArchiver = new MavenArchiver();
  
      public ManifestCreationFinalizer(
              final MavenSession session,
              final MavenProject project,
              final MavenArchiveConfiguration archiveConfiguration) {
          this.session = session;
          this.project = project;
          this.archiveConfiguration = archiveConfiguration;
      }
  
      @Override
      public void finalizeArchiveCreation(final Archiver archiver) {
          if (archiveConfiguration != null) {
              try {
                  Manifest manifest;
                  final File manifestFile = archiveConfiguration.getManifestFile();
  
                  if (manifestFile != null) {
                      try (InputStream in = new FileInputStream(manifestFile)) {
                          manifest = new Manifest(in);
                      } catch (final FileNotFoundException e) {
                          throw new ArchiverException("Manifest not found: " + e.getMessage(), e);
                      } catch (final IOException e) {
                          throw new ArchiverException("Error processing manifest: " + e.getMessage(), e);
                      }
                  } else {
                      manifest = mavenArchiver.getManifest(session, project, archiveConfiguration);
                  }
  
                  if (manifest != null
                          && !archiveConfiguration.getManifestEntries().isEmpty()) {
                      for (Map.Entry<String, String> entry :
                              archiveConfiguration.getManifestEntries().entrySet()) {
                          manifest.getMainSection()
                                  .addConfiguredAttribute(new Manifest.Attribute(entry.getKey(), entry.getValue()));
                      }
                  }
  
                  if ((manifest != null) && (archiver instanceof JarArchiver)) {
                      final JarArchiver jarArchiver = (JarArchiver) archiver;
                      jarArchiver.addConfiguredManifest(manifest);
                 }
             } catch (final ManifestException e) {
                 throw new ArchiverException("Error creating manifest: " + e.getMessage(), e);
             } catch (final DependencyResolutionRequiredException e) {
                 throw new ArchiverException("Dependencies were not resolved: " + e.getMessage(), e);
             }
         }
     }
 
     @Override
     public List<String> getVirtualFiles() {
         if (archiveConfiguration != null) {
             try {
                 if (mavenArchiver.getManifest(project, archiveConfiguration.getManifest()) != null) {
                     return Collections.singletonList("META-INF/MANIFEST.MF");
                 }
             } catch (final ManifestException | DependencyResolutionRequiredException ignore) {
                 // noop
             }
         }
 
         return null;
     }
 }