package yarfraw.mapping.forward.impl;

 import java.math.BigInteger;

 import java.util.List;

 import javax.xml.bind.JAXBElement;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import yarfraw.core.datamodel.CategorySubject;

 import yarfraw.core.datamodel.ChannelFeed;

 import yarfraw.core.datamodel.Day;

 import yarfraw.core.datamodel.FeedFormat;

 import yarfraw.core.datamodel.ItemEntry;

 import yarfraw.core.datamodel.YarfrawException;

 import yarfraw.generated.rss20.elements.ObjectFactory;

 import yarfraw.generated.rss20.elements.TRssChannel;

 import yarfraw.generated.rss20.elements.TSkipDay;

 import yarfraw.generated.rss20.elements.TSkipDaysList;

 import yarfraw.generated.rss20.elements.TSkipHoursList;

 import yarfraw.mapping.forward.ToRss20Channel;

 import yarfraw.utils.CommonUtils;

 /**

  * Util methods for mapping Yarfraw core model to Rss20 Jaxb model

  * @author jliang

  *

  */

 public class ToRss20ChannelImpl implements ToRss20Channel{

   private static final Log LOG = LogFactory.getLog(ToRss20ChannelImpl.class);

    private static ToRss20Channel _instance = new ToRss20ChannelImpl();

    public static ToRss20Channel getInstance(){

      return _instance;

    }

    private ToRss20ChannelImpl(){}

   public JAXBElement<TRssChannel> execute(ChannelFeed channel) throws YarfrawException {

     return new ObjectFactory().createChannel(toChannel(channel));

   }

   private TRssChannel toChannel(ChannelFeed ch){

     ObjectFactory factory = new ObjectFactory();

     TRssChannel ret = factory.createTRssChannel();

     List<Object> elementList = ret.getTitleOrLinkOrDescription();

     if(ch.getOtherElements() != null){

       ret.getAny().addAll(ch.getOtherElements());

     }

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

       ret.getOtherAttributes().putAll(ch.getOtherAttributes());

     }

     if(ch.getCategorySubjects() != null){

       for(CategorySubject c : ch.getCategorySubjects()){

         if(c != null){

           elementList.add(Rss20MappingUtils.toRss20Category(c));

         }

       }

     }

     if(ch.getCloud() != null){

       elementList.add(Rss20MappingUtils.toRss20Cloud(ch.getCloud()));

     }

     if(ch.getRightsText() != null){

       elementList.add(factory.createTRssChannelCopyright(ch.getRightsText()));

     }

     if(ch.getDescriptionOrSubtitleText() != null){

       elementList.add(factory.createTRssChannelDescription(ch.getDescriptionOrSubtitleText()));

     }

     if(ch.getDocs() != null){

       elementList.add(factory.createTRssChannelDocs(ch.getDocs()));

     }

     if(ch.getGenerator() != null){

       String generator = ch.getGenerator().getValue();

       elementList.add(factory.createTRssChannelGenerator(generator));

     }

     if(ch.getImageOrIcon() != null){

       elementList.add(Rss20MappingUtils.toRss20Image(ch.getImageOrIcon()));

     }

     if(ch.getItems() != null){

       for(ItemEntry t : ch.getItems()){

         if(t != null){

           ret.getItem().add(Rss20MappingUtils.toRss20Item(t).getValue());

         }

       }

     }

     if(ch.getLang() != null){

       elementList.add(factory.createTRssChannelLanguage(ch.getLang()));

     }

     String link = Utils.getHrefLink(ch.getLinks());

     if(link != null){

       elementList.add(factory.createTRssChannelLink(link));

     }

     if(ch.getLastBuildOrUpdatedDate() != null){

       String dateString = ch.getLastBuildOrUpdatedDate();

       if(!CommonUtils.isDateFormatValid(dateString, FeedFormat.RSS20)){

         String newDateString = CommonUtils.formatDate(CommonUtils.tryParseDate(dateString), FeedFormat.RSS20);

         if(newDateString != null){

           dateString = newDateString;

         }else{

           LOG.warn("The dateString "+dateString+" is in valid according to RSS 2.0 specs, unabel to convert it to a valid format, writing it as is");

         }

       }

       elementList.add(factory.createTRssChannelLastBuildDate(dateString));

     }

     String editor = Utils.getEmailOrText(ch.getManagingEditorOrAuthorOrPublisher());

     if(editor != null){

       elementList.add(factory.createTRssChannelManagingEditor(editor));

     }

     if(ch.getPubDate() != null){

       String dateString = ch.getPubDate();

       if(!CommonUtils.isDateFormatValid(dateString, FeedFormat.RSS20)){

         String newDateString = CommonUtils.formatDate(CommonUtils.tryParseDate(dateString), FeedFormat.RSS20);

         if(newDateString != null){

           dateString = newDateString;

         }else{

           LOG.warn("The dateString "+dateString+" is in valid according to RSS 1.0 specs, unabel to convert it to a valid format, writing it as is");

         }

       }

       elementList.add(factory.createTRssChannelPubDate(dateString));

     }

     if(ch.getSkipDays() != null){

       TSkipDaysList tdl = new TSkipDaysList();

       for(Day day : ch.getSkipDays()){

         tdl.getDay().add(TSkipDay.fromValue(day.toString()));

       }

       elementList.add(new ObjectFactory().createSkipDays( tdl));

     }

     if(ch.getSkipHours() != null){

       TSkipHoursList thl = new TSkipHoursList();

       thl.getHour().addAll(ch.getSkipHours());

       elementList.add(new ObjectFactory().createSkipHours( thl));

     }

     if(ch.getTexInput() != null){

       elementList.add(Rss20MappingUtils.toRss20TextInput(ch.getTexInput()));      

     }

     if(ch.getTitleText() != null){

       elementList.add(factory.createTRssChannelTitle(ch.getTitleText()));

     }

     if(ch.getTtl() != null){

       elementList.add(factory.createTRssChannelTtl(new BigInteger(String.valueOf(ch.getTtl()))));

     }

     String webmaster = Utils.getEmailOrText(ch.getWebMasterOrCreator());

     if(webmaster != null){

       elementList.add(factory.createTRssChannelWebMaster(webmaster));

     }

     return ret;

   }

 }