/**
 *
 * 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.client.util;

import static org.qi4j.api.util.Iterables.flatten;
import static org.qi4j.api.util.Iterables.matchesAny;

import java.awt.Component;
import java.util.HashMap;
import java.util.Map;
import java.util.Observable;
import java.util.Observer;

import org.qi4j.api.specification.Specification;
import org.qi4j.api.specification.Specifications;

import se.streamsource.dci.value.ResourceValue;
import se.streamsource.dci.value.link.LinkValue;
import se.streamsource.dci.value.link.Links;

/**
 * Register components here that should be visible/invisible, enabled/disabled depending on available commands.
 */
public class RefreshComponents
   implements Observer
{
   Map<Specification<LinkValue>, Component> visibles = new HashMap<Specification<LinkValue>, Component>(  );
   Map<Specification<LinkValue>, Component> enableds = new HashMap<Specification<LinkValue>, Component>(  );

   public RefreshComponents visibleOn(String commandOrQuery, Component... components)
   {
      for (Component component : components)
      {
         visibles.put( Links.withRel( commandOrQuery ), component );
      }
      return this;
   }

   public RefreshComponents enabledOn(String commandOrQuery, Component... components)
   {
      for (Component component : components)
      {
         enableds.put( Links.withRel( commandOrQuery ), component );
      }
      return this;
   }

   public void update( Observable o, Object arg )
   {
      if (arg instanceof ResourceValue)
         refresh((ResourceValue)arg);
   }

   public void refresh(ResourceValue resourceValue)
   {
      for (Map.Entry<Specification<LinkValue>, Component> en : visibles.entrySet())
      {
         Component value = en.getValue();

         for (Component component : Components.components( Specifications.<Component>TRUE(), value ))
         {
            component.setVisible( resourceValue != null && matchesAny( en.getKey(), flatten(resourceValue.queries().get(), resourceValue.commands().get()) ) );
         }
      }

      for (Map.Entry<Specification<LinkValue>, Component> en : enableds.entrySet())
      {
         Component value = en.getValue();

         for (Component component : Components.components( Specifications.<Component>TRUE(), value ))
         {
            boolean enabled = resourceValue != null && matchesAny( en.getKey(), flatten(resourceValue.queries().get(), resourceValue.commands().get() ));
            component.setEnabled( enabled );
         }

      }
   }

}