/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   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.core.metapath.format.IPathFormatter;
  import gov.nist.secauto.metaschema.core.metapath.item.node.IModelNodeItem;
  import gov.nist.secauto.metaschema.core.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 IModelNodeItem<?, ?> 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 IModelNodeItem<?, ?> 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 IModelNodeItem<?, ?> 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;
   }
 }