/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package dev.metaschema.oscal.lib.profile.resolver.support;
   
   import java.net.URI;
   
  import dev.metaschema.core.metapath.item.node.IModelNodeItem;
  import dev.metaschema.core.util.ObjectUtils;
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  public abstract class AbstractEntityItem implements IEntityItem {
  
    @NonNull
    private final String originalIdentifier;
    @NonNull
    private IModelNodeItem<?, ?> instance;
    @NonNull
    private final ItemType itemType;
    @NonNull
    private final URI source;
    private int referenceCount; // 0 by default
    // private boolean resolved; // false by default
  
    protected AbstractEntityItem(@NonNull Builder builder) {
      this.itemType = ObjectUtils.requireNonNull(builder.itemType, "itemType");
      this.originalIdentifier = ObjectUtils.requireNonNull(builder.originalIdentifier, "originalIdentifier");
      this.instance = ObjectUtils.requireNonNull(builder.instance, "instance");
      this.source = ObjectUtils.requireNonNull(builder.source, "source");
    }
  
    @Override
    @NonNull
    public String getOriginalIdentifier() {
      return originalIdentifier;
    }
  
    @Override
    @NonNull
    public abstract String getIdentifier();
  
    // @NonNull
    // public String getIdentifier() {
    // final String checkedReassignedIdentifier = reassignedIdentifier;
    // return checkedReassignedIdentifier == null ? originalIdentifier :
    // checkedReassignedIdentifier;
    // }
  
    @Override
    @NonNull
    public IModelNodeItem<?, ?> getInstance() {
      return instance;
    }
  
    @Override
    public void setInstance(IModelNodeItem<?, ?> item) {
      instance = item;
    }
  
    @Override
    @NonNull
    @SuppressWarnings("unchecked")
    public <T> T getInstanceValue() {
      return ObjectUtils.notNull((T) getInstance().getValue());
    }
  
    @Override
    @NonNull
    public ItemType getItemType() {
      return itemType;
    }
  
    @Override
    @NonNull
    public URI getSource() {
      return source;
    }
  
    @Override
    public int getReferenceCount() {
      return referenceCount;
    }
  
    // public boolean isResolved() {
    // return resolved;
    // }
    //
    // public void markResolved() {
    // resolved = true;
    // }
  
    @Override
    public void incrementReferenceCount() {
      referenceCount += 1;
    }
  
    @Override
   public int resetReferenceCount() {
     int retval = referenceCount;
     referenceCount = 0;
     return retval;
   }
 
   static final class Builder {
     private String originalIdentifier;
     private String reassignedIdentifier;
     private IModelNodeItem<?, ?> instance;
     private ItemType itemType;
     private URI source;
 
     @NonNull
     public Builder instance(@NonNull IModelNodeItem<?, ?> item, @NonNull ItemType itemType) {
       this.instance = item;
       this.itemType = itemType;
       return this;
     }
 
     // @NonNull
     // public Builder reassignedIdentifier(@NonNull UUID identifier) {
     // // no need to normalize, since UUIDs are formatted lower case
     // return reassignedIdentifier(identifier.toString());
     // }
 
     @NonNull
     public Builder reassignedIdentifier(@NonNull String identifier) {
       this.reassignedIdentifier = identifier;
       return this;
     }
     //
     // @NonNull
     // public Builder originalIdentifier(@NonNull UUID identifier) {
     // // no need to normalize, since UUIDs are formatted lower case
     // return originalIdentifier(identifier.toString());
     // }
 
     @NonNull
     public Builder originalIdentifier(@NonNull String identifier) {
       this.originalIdentifier = identifier;
       return this;
     }
 
     @NonNull
     public Builder source(@NonNull URI source) {
       this.source = source;
       return this;
     }
 
     @NonNull
     public IEntityItem build() {
       return reassignedIdentifier == null ? new OriginalEntityItem(this) : new ReassignedEntityItem(this);
     }
   }
 
   static final class OriginalEntityItem
       extends AbstractEntityItem {
 
     protected OriginalEntityItem(@NonNull Builder builder) {
       super(builder);
     }
 
     @Override
     public String getIdentifier() {
       return getOriginalIdentifier();
     }
 
     @Override
     public boolean isIdentifierReassigned() {
       return false;
     }
   }
 
   static final class ReassignedEntityItem
       extends AbstractEntityItem {
     @NonNull
     private final String reassignedIdentifier;
 
     protected ReassignedEntityItem(@NonNull Builder builder) {
       super(builder);
       this.reassignedIdentifier = ObjectUtils.requireNonNull(builder.reassignedIdentifier);
     }
 
     @Override
     public String getIdentifier() {
       return reassignedIdentifier;
     }
 
     @Override
     public boolean isIdentifierReassigned() {
       return true;
     }
   }
 }