package yarfraw.mapping.backward.impl;

 import static yarfraw.io.parser.ElementQName.RSS20_AUTHOR;

 import static yarfraw.io.parser.ElementQName.RSS20_COMMENTS;

 import static yarfraw.io.parser.ElementQName.RSS20_DESCRIPTION;

 import static yarfraw.io.parser.ElementQName.RSS20_LINK;

 import static yarfraw.io.parser.ElementQName.RSS20_PUBDATE;

 import static yarfraw.io.parser.ElementQName.RSS20_TITLE;

 import static yarfraw.utils.XMLUtils.same;

 import java.util.Map;

 import javax.xml.bind.JAXBElement;

 import javax.xml.namespace.QName;

 import org.apache.commons.lang.builder.ToStringBuilder;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import org.w3c.dom.Element;

 import yarfraw.core.datamodel.CategorySubject;

 import yarfraw.core.datamodel.Enclosure;

 import yarfraw.core.datamodel.Id;

 import yarfraw.core.datamodel.ItemEntry;

 import yarfraw.core.datamodel.Source;

 import yarfraw.core.datamodel.YarfrawException;

 import yarfraw.generated.rss20.elements.TCategory;

 import yarfraw.generated.rss20.elements.TEnclosure;

 import yarfraw.generated.rss20.elements.TGuid;

 import yarfraw.generated.rss20.elements.TRssItem;

 import yarfraw.generated.rss20.elements.TSource;

 class Rss20MappingUtils{

   private static final Log LOG = LogFactory.getLog(Rss20MappingUtils.class);

   private Rss20MappingUtils(){}

   @SuppressWarnings("unchecked")

   public static ItemEntry toItem(TRssItem ti) throws YarfrawException {

     if(ti == null){

       return null;

     }

     ItemEntry item = new ItemEntry();

     for(Object o : ti.getTitleOrDescriptionOrLink()){

       if(o == null){

         continue;

       }

       if(ti.getOtherAttributes() != null){

         for(Map.Entry<QName, String> e : ti.getOtherAttributes().entrySet()){

           item.addOtherAttributes(e.getKey(), e.getValue());

         }

       }

       if (o instanceof JAXBElement) {

         JAXBElement jaxbElement = (JAXBElement) o;

         Object val = jaxbElement.getValue();

         if(same(jaxbElement.getName(), RSS20_AUTHOR)){

           item.addAuthorOrCreator((String)jaxbElement.getValue());

         }else if (same(jaxbElement.getName(), RSS20_COMMENTS)) {

           item.setComments((String)jaxbElement.getValue());

         }else if (same(jaxbElement.getName(), RSS20_DESCRIPTION)) {

           item.setDescriptionOrSummary((String)jaxbElement.getValue());

         }else if (same(jaxbElement.getName(), RSS20_LINK)) {

           item.addLink((String)jaxbElement.getValue());

         }else if (same(jaxbElement.getName(), RSS20_PUBDATE)) {

           item.setPubDate((String)jaxbElement.getValue());

         }else if (same(jaxbElement.getName(), RSS20_TITLE)) {

           item.setTitle((String)jaxbElement.getValue());

         }else if (val instanceof TCategory) {

           TCategory cat = (TCategory) val;

           item.addCategorySubject(new CategorySubject().setCategoryOrSubjectOrTerm(cat.getValue())

                   .setDomainOrScheme(cat.getDomain()));

         }else if (val instanceof TEnclosure) {

           TEnclosure en = (TEnclosure)val;

           item.setEnclosure(new Enclosure(en.getUrl(), 

                     en.getLength() == null ? null : en.getLength().toString(), 

                     en.getType(), en.getValue()));

         }else if (val instanceof TGuid) {

           TGuid guid = (TGuid)val;

           item.setUid(new Id(guid.getValue()).setPermaLink(guid.isIsPermaLink()));

         }else if (val instanceof TSource) {

           TSource source = (TSource)val;

           item.setSource(new Source(source.getUrl(), source.getValue()));

         }else{

           LOG.warn("Unexpected jaxbElement: "+ToStringBuilder.reflectionToString(jaxbElement)+" this should not happen!");

         }

       }else if (o instanceof Element) {

         Element e = (Element) o;

         item.getOtherElements().add(e);

       }else{

         LOG.warn("Unexpected object: "+ToStringBuilder.reflectionToString(o)+" this should not happen!");

       }

     }

     return item;

   }

 }