/*
    * 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.oscal.lib.profile.resolver.policy;
  
  import com.vladsch.flexmark.ast.InlineLinkNode;
  import com.vladsch.flexmark.util.sequence.BasedSequence;
  import com.vladsch.flexmark.util.sequence.CharSubSequence;
  
  import gov.nist.secauto.metaschema.model.common.metapath.format.IPathFormatter;
  import gov.nist.secauto.metaschema.model.common.metapath.item.IRequiredValueModelNodeItem;
  import gov.nist.secauto.metaschema.model.common.util.CustomCollectors;
  import gov.nist.secauto.oscal.lib.profile.resolver.support.IEntityItem;
  
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  import java.net.URI;
  import java.util.List;
  import java.util.Locale;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  public class AnchorReferencePolicy
      extends AbstractCustomReferencePolicy<InlineLinkNode> {
    private static final Logger LOGGER = LogManager.getLogger(AnchorReferencePolicy.class);
  
    public AnchorReferencePolicy() {
      super(IIdentifierParser.FRAGMENT_PARSER);
    }
  
    @SuppressWarnings("null")
    @Override
    protected List<IEntityItem.ItemType> getEntityItemTypes(@NonNull InlineLinkNode link) {
      return List.of(
          IEntityItem.ItemType.RESOURCE,
          IEntityItem.ItemType.CONTROL,
          IEntityItem.ItemType.GROUP,
          IEntityItem.ItemType.PART);
    }
  
    @Override
    public String getReferenceText(@NonNull InlineLinkNode link) {
      return link.getUrl().toString();
    }
  
    @Override
    public void setReferenceText(@NonNull InlineLinkNode link, @NonNull String newValue) {
      link.setUrl(BasedSequence.of(newValue));
    }
  
    @Override
    protected void handleUnselected(
        @NonNull IRequiredValueModelNodeItem contextItem,
        @NonNull InlineLinkNode link,
        @NonNull IEntityItem item,
        @NonNull ReferenceCountingVisitor.Context visitorContext) {
      URI linkHref = URI.create(link.getUrl().toString());
      URI sourceUri = item.getSource();
  
      URI resolved = sourceUri.resolve(linkHref);
      if (LOGGER.isTraceEnabled()) {
        LOGGER.atTrace().log("At path '{}', remapping orphaned URI '{}' to '{}'",
            contextItem.toPath(IPathFormatter.METAPATH_PATH_FORMATER),
            linkHref.toString(),
            resolved.toString());
      }
      link.setUrl(CharSubSequence.of(resolved.toString()));
    }
  
    @Override
    protected boolean handleIndexMiss(
        @NonNull IRequiredValueModelNodeItem contextItem,
        @NonNull InlineLinkNode reference,
        @NonNull List<IEntityItem.ItemType> itemTypes,
        @NonNull String identifier,
       @NonNull ReferenceCountingVisitor.Context visitorContext) {
     if (LOGGER.isErrorEnabled()) {
       LOGGER.atError().log(
           "The anchor at '{}' should reference a {} identified by '{}', but the identifier was not found in the index.",
           contextItem.toPath(IPathFormatter.METAPATH_PATH_FORMATER),
           itemTypes.stream()
               .map(en -> en.name().toLowerCase(Locale.ROOT))
               .collect(CustomCollectors.joiningWithOxfordComma("or")),
           identifier);
     }
     return true;
   }
 
   @Override
   protected boolean handleIdentifierNonMatch(
       @NonNull IRequiredValueModelNodeItem contextItem,
       @NonNull InlineLinkNode reference,
       @NonNull ReferenceCountingVisitor.Context visitorContext) {
     if (LOGGER.isDebugEnabled()) {
       LOGGER.atDebug().log("Ignoring URI '{}' at '{}'",
           reference.getUrl().toStringOrNull(),
           contextItem.toPath(IPathFormatter.METAPATH_PATH_FORMATER));
     }
 
     return true;
   }
 }