/**
    * Portions of this software was developed by employees of the National Institute
    * of Standards and Technology (NIST), an agency of the Federal Government and is
    * being made available as a public service. Pursuant to title 17 United States
    * Code Section 105, works of NIST employees are not subject to copyright
    * protection in the United States. This software may be subject to foreign
    * copyright. Permission in the United States and in foreign countries, to the
    * extent that NIST may hold copyright, to use, copy, modify, create derivative
    * works, and distribute this software and its documentation without fee is hereby
   * granted on a non-exclusive basis, provided that this notice and disclaimer
   * of warranty appears in all copies.
   *
   * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
   * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
   * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
   * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
   * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
   * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
   * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
   * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
   * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
   * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
   * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
   */
  
  package gov.nist.secauto.swid.plugin.entry.resource;
  
  import gov.nist.secauto.swid.plugin.entry.AbstractFileEntryProcessor;
  import gov.nist.secauto.swid.plugin.entry.FileEntry;
  import gov.nist.secauto.swid.plugin.entry.FileFileEntry;
  import gov.nist.secauto.swid.plugin.entry.FileSelectorPredicate;
  
  import org.apache.maven.model.Resource;
  import org.apache.maven.plugin.logging.Log;
  import org.codehaus.plexus.components.io.fileselectors.IncludeExcludeFileSelector;
  
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  import java.util.stream.Collectors;
  
  public class ResourceFileEntryProcessor extends AbstractFileEntryProcessor<Resource> {
  
    private IncludeExcludeFileSelector selector = new IncludeExcludeFileSelector();
    private final String buildOutputDirectory;
  
    /**
     * Construct a new entry processor.
     * 
     * @param buildOutputDirectory
     *          the directory where built classes are stored
     * @param log
     *          the Maven logger instance
     */
    public ResourceFileEntryProcessor(String buildOutputDirectory, Log log) {
      super(log);
      Objects.requireNonNull(buildOutputDirectory);
      this.buildOutputDirectory = buildOutputDirectory;
    }
  
    public void setIncludes(String[] includes) {
      selector.setIncludes(includes);
    }
  
    public void setExcludes(String[] excludes) {
      selector.setExcludes(excludes);
    }
  
    @Override
    public List<FileEntry> process(List<? extends Resource> resources) throws IOException {
      List<FileEntry> processedResources = super.process(resources);
      List<FileEntry> processedClasses = generateClassFileEntries();
  
      int size = processedResources.size() + processedClasses.size();
      List<FileEntry> retval;
      if (size == 0) {
        retval = Collections.emptyList();
      } else {
        retval = new ArrayList<>(size);
        retval.addAll(processedResources);
        retval.addAll(processedClasses);
      }
      return retval;
    }
  
    private List<FileEntry> generateClassFileEntries() throws IOException {
      getLog().debug("Processing classes: " + buildOutputDirectory);
  
      Path path = Paths.get(buildOutputDirectory);
  
      List<FileEntry> retval;
      if (path.toFile().exists()) {
       retval = Files.walk(path).filter(Files::isRegularFile).map(p -> new FileFileEntry(p, path))
           .filter(new FileSelectorPredicate(selector)).collect(Collectors.toList());
     } else {
       retval = Collections.emptyList();
     }
     return retval;
   }
 
   @Override
   protected Collection<? extends FileEntry> generateFileEntries(Resource resource) throws IOException {
     getLog().debug("Processing resource: " + resource.getDirectory());
 
     Path path = Paths.get(resource.getDirectory());
 
     List<FileEntry> retval;
     if (path.toFile().exists()) {
       retval = Files.walk(path).filter(Files::isRegularFile).map(p -> new ResourceFileEntry(resource, p))
           .filter(new FileSelectorPredicate(selector)).collect(Collectors.toList());
     } else {
       retval = Collections.emptyList();
     }
     return retval;
   }
 
 }