/**
 *
 * Copyright
 * 2009-2015 Jayway Products AB
 * 2016-2017 Föreningen Sambruk
 *
 * Licensed under AGPL, Version 3.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.gnu.org/licenses/agpl.txt
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package se.streamsource.streamflow.web.domain.structure.form;

import org.qi4j.api.common.Optional;
import org.qi4j.api.entity.association.ManyAssociation;
import org.qi4j.api.mixin.Mixins;

import se.streamsource.streamflow.infrastructure.event.domain.DomainEvent;
import se.streamsource.streamflow.web.context.LinksBuilder;
import se.streamsource.streamflow.web.domain.Describable;

/**
 * JAVADOC
 */
@Mixins(SelectedForms.Mixin.class)
public interface SelectedForms
{
   void addSelectedForm( Form form );

   void removeSelectedForm( Form form );

   boolean hasSelectedForm( Form form );

   interface Data
   {
      ManyAssociation<Form> selectedForms();

      void addedSelectedForm( @Optional DomainEvent event, Form form );

      void removedSelectedForm( @Optional DomainEvent event, Form form );

      public void possibleForms( LinksBuilder builder, Iterable<Forms.Data> forms );
   }

   abstract class Mixin
         implements SelectedForms, Data
   {
      public void addSelectedForm( Form form )
      {
         addedSelectedForm( null, form );
      }

      public void removeSelectedForm( Form form )
      {
         removedSelectedForm( null, form );
      }

      public boolean hasSelectedForm( Form form )
      {
         return selectedForms().contains( form );
      }

      public void addedSelectedForm( @Optional DomainEvent event, Form form )
      {
         selectedForms().add( form );
      }

      public void removedSelectedForm( @Optional DomainEvent event, Form form )
      {
         selectedForms().remove( form );
      }

      public void possibleForms( LinksBuilder builder, Iterable<Forms.Data> forms )
      {
         for (Forms.Data form : forms)
         {
            for (Form definedForm : form.forms())
            {
               if (!selectedForms().contains( definedForm ))
               {
                  builder.addDescribable( definedForm, (Describable) form );
               }
            }
         }
      }
   }
}