/*
    * 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.metaschema.databind.model.info;
  
  import gov.nist.secauto.metaschema.core.util.ObjectUtils;
  import gov.nist.secauto.metaschema.databind.io.BindingException;
  import gov.nist.secauto.metaschema.databind.io.json.IJsonParsingContext;
  import gov.nist.secauto.metaschema.databind.io.json.IJsonWritingContext;
  import gov.nist.secauto.metaschema.databind.io.xml.IXmlParsingContext;
  import gov.nist.secauto.metaschema.databind.io.xml.IXmlWritingContext;
  import gov.nist.secauto.metaschema.databind.model.IBoundNamedModelInstance;
  
  import java.io.IOException;
  import java.util.List;
  
  import javax.xml.namespace.QName;
  import javax.xml.stream.XMLStreamException;
  import javax.xml.stream.events.StartElement;
  
  import edu.umd.cs.findbugs.annotations.NonNull;
  
  class SingletonPropertyInfo
      extends AbstractModelPropertyInfo {
  
    public SingletonPropertyInfo(
        @NonNull IBoundNamedModelInstance property) {
      super(property);
    }
  
    @SuppressWarnings("null")
    @Override
    public List<?> getItemsFromValue(Object value) {
      return value == null ? List.of() : List.of(value);
    }
  
    @Override
    public int getItemCount(Object value) {
      return value == null ? 0 : 1;
    }
  
    @Override
    public void readValues(IPropertyCollector collector, Object parentInstance, IJsonParsingContext context)
        throws IOException {
  
      // JsonParser parser = context.getReader();
      //
      // boolean isObject = JsonToken.START_OBJECT.equals(parser.currentToken()); //
      // TODO: is this object
      // check needed?
      // if (isObject) {
      // // read the object's START_OBJECT
      // JsonUtil.assertAndAdvance(parser, JsonToken.START_OBJECT);
      // }
  
      Object value = getProperty().getDataTypeHandler().readItem(parentInstance, context);
      collector.add(value);
  
      // if (isObject) {
      // // read the object's END_OBJECT
      // JsonUtil.assertAndAdvance(context.getReader(), JsonToken.END_OBJECT);
      // }
    }
  
    @Override
    public boolean readValues(IPropertyCollector collector, Object parentInstance, StartElement start,
        IXmlParsingContext context) throws IOException, XMLStreamException {
      boolean handled = true;
      Object value = context.readModelInstanceValue(getProperty(), parentInstance, start);
      if (value != null) {
        collector.add(value);
        handled = true;
      }
      return handled;
    }
  
   @Override
   public Class<?> getItemType() {
     return (Class<?>) getProperty().getType();
   }
 
   @Override
   public IPropertyCollector newPropertyCollector() {
     return new SingletonPropertyCollector();
   }
 
   @Override
   public void writeValues(@NonNull Object value, QName parentName, IXmlWritingContext context)
       throws XMLStreamException, IOException {
     context.writeInstanceValue(getProperty(), value, parentName);
   }
 
   @Override
   public void writeValues(Object parentObject, IJsonWritingContext context) throws IOException {
     IBoundNamedModelInstance property = getProperty();
     getProperty().getDataTypeHandler().writeItem(
         ObjectUtils.notNull(property.getValue(parentObject)),
         context);
   }
 
   @Override
   public boolean isValueSet(Object parentInstance) throws IOException {
     return getProperty().getValue(parentInstance) != null;
   }
 
   @Override
   public void copy(@NonNull Object fromInstance, @NonNull Object toInstance, @NonNull IPropertyCollector collector)
       throws BindingException {
     IBoundNamedModelInstance property = getProperty();
 
     Object value = property.getValue(fromInstance);
 
     Object copiedValue = property.copyItem(ObjectUtils.requireNonNull(value), toInstance);
 
     collector.add(copiedValue);
   }
 
 }