/**
 *
 * 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.context.administration.forms;

import org.qi4j.api.entity.EntityReference;
import org.qi4j.api.injection.scope.Structure;
import org.qi4j.api.query.QueryExpressions;
import org.qi4j.api.specification.Specification;
import org.qi4j.api.structure.Module;
import org.qi4j.api.util.Iterables;
import org.qi4j.api.value.ValueBuilder;
import se.streamsource.dci.api.DeleteContext;
import se.streamsource.dci.api.IndexContext;
import se.streamsource.dci.api.RoleMap;
import se.streamsource.dci.value.EntityValue;
import se.streamsource.dci.value.link.LinksValue;
import se.streamsource.streamflow.api.administration.form.FormValue;
import se.streamsource.streamflow.web.context.LinksBuilder;
import se.streamsource.streamflow.web.domain.Describable;
import se.streamsource.streamflow.web.domain.Removable;
import se.streamsource.streamflow.web.domain.entity.form.FormEntity;
import se.streamsource.streamflow.web.domain.interaction.gtd.Ownable;
import se.streamsource.streamflow.web.domain.interaction.gtd.Owner;
import se.streamsource.streamflow.web.domain.structure.form.Form;
import se.streamsource.streamflow.web.domain.structure.form.Forms;
import se.streamsource.streamflow.web.domain.structure.form.SelectedForms;
import se.streamsource.streamflow.web.domain.structure.organization.AccessPoint;

import java.util.Locale;
import java.util.ResourceBundle;

import static org.qi4j.api.query.QueryExpressions.*;
import static se.streamsource.dci.api.RoleMap.*;

/**
 * JAVADOC
 */
public class FormContext
      implements DeleteContext, IndexContext<FormValue>
{
   @Structure
   Module module;

   private final static String accessPoints = "accesspoints";

   public FormValue index()
   {
      FormEntity form = RoleMap.role( FormEntity.class );

      ValueBuilder<FormValue> builder = module.valueBuilderFactory().newValueBuilder( FormValue.class );

      builder.prototype().note().set( form.note().get() );
      builder.prototype().description().set( form.description().get() );
      builder.prototype().form().set( EntityReference.parseEntityReference( form.identity().get() ) );
      builder.prototype().id().set( form.formId().get() );

      return builder.newInstance();
   }

   public Iterable<Forms> possiblemoveto()
   {
      final Forms thisForms = role(Forms.class);

      return Iterables.filter( new Specification<Forms>()
      {
         public boolean satisfiedBy( Forms item )
         {
            Owner owner =  ((Ownable.Data)item).owner().get();
            return !item.equals(thisForms) && !((Removable.Data)owner).removed().get();
         }
      }, module.queryBuilderFactory().newQueryBuilder( Forms.class )
            .where( and(
                  eq( templateFor( Removable.Data.class ).removed(), false ),
                  QueryExpressions.isNotNull( templateFor( Ownable.Data.class ).owner() )
            ) )
            .newQuery( module.unitOfWorkFactory().currentUnitOfWork() ));
   }

   public void move( EntityValue to )
   {
      Forms toForms = module.unitOfWorkFactory().currentUnitOfWork().get( Forms.class, to.entity().get() );
      Form form = RoleMap.role( Form.class );
      RoleMap.role( Forms.class ).moveForm( form, toForms );
   }

   public LinksValue usages()
   {
      ResourceBundle bundle = ResourceBundle.getBundle( FormContext.class.getName(), RoleMap.role( Locale.class ) );

      Iterable<SelectedForms> selectedForms = RoleMap.role( Forms.class ).usages( RoleMap.role( Form.class ) );
      LinksBuilder builder = new LinksBuilder( module.valueBuilderFactory() );

      for( SelectedForms forms : selectedForms )
      {
         if( forms instanceof AccessPoint )
         {
            builder.addDescribable( (Describable) forms, bundle.getString( accessPoints.toString()) );

         } else
         {
            if( !(((Removable.Data)((Ownable.Data)forms).owner().get()).removed().get()) )
               builder.addDescribable( (Describable) forms, ((Describable)((Ownable.Data)forms).owner().get()).getDescription() );
         }
      }
      return builder.newLinks();
   }

   public void delete()
   {
      Form form = RoleMap.role( Form.class );
      Forms forms = RoleMap.role( Forms.class );
      forms.removeForm( form );
   }
}