/*
 * JBoss, a division of Red Hat
 * Copyright 2011, Red Hat Middleware, LLC, and individual
 * contributors as indicated by the @authors tag. See the
 * copyright.txt in the distribution for a full listing of
 * individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.gatein.wsrp.registration.mapping;

import org.chromattic.api.annotations.Create;
import org.chromattic.api.annotations.Id;
import org.chromattic.api.annotations.ManyToOne;
import org.chromattic.api.annotations.MappedBy;
import org.chromattic.api.annotations.OneToMany;
import org.chromattic.api.annotations.OneToOne;
import org.chromattic.api.annotations.Owner;
import org.chromattic.api.annotations.Path;
import org.chromattic.api.annotations.PrimaryType;
import org.chromattic.api.annotations.Property;
import org.gatein.common.io.IOTools;
import org.gatein.common.util.ParameterValidation;
import org.gatein.pc.api.PortletContext;
import org.gatein.pc.api.PortletStateType;
import org.gatein.pc.api.StatefulPortletContext;
import org.gatein.registration.RegistrationException;
import org.gatein.registration.RegistrationStatus;
import org.gatein.registration.spi.ConsumerSPI;
import org.gatein.registration.spi.RegistrationSPI;
import org.gatein.wsrp.jcr.mapping.BaseMapping;
import org.gatein.wsrp.registration.JCRRegistrationPersistenceManager;

import javax.xml.namespace.QName;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;

/**
 * @author <a href="mailto:chris.laprun@jboss.com">Chris Laprun</a>
 * @version $Revision$
 */
@PrimaryType(name = RegistrationMapping.NODE_NAME)
public abstract class RegistrationMapping implements BaseMapping<RegistrationSPI, JCRRegistrationPersistenceManager>
{
   public static final String NODE_NAME = "wsrp:registration";

   @Id
   public abstract String getPersistentKey();

   @Property(name = "status")
   public abstract RegistrationStatus getStatus();

   public abstract void setStatus(RegistrationStatus status);

   @Property(name = "registrationhandle")
   public abstract String getRegistrationHandle();

   public abstract void setRegistrationHandle(String handle);

   @OneToMany
   public abstract Collection<PortletContextMapping> getPortletContexts();

   @Create
   public abstract PortletContextMapping createPortletContext(String id);

   @OneToOne
   @Owner
   @MappedBy("properties")
   public abstract RegistrationPropertiesMapping getProperties();

   public abstract void setProperties(RegistrationPropertiesMapping rpm);

   @Create
   public abstract RegistrationPropertiesMapping createProperties();

   @Path
   public abstract String getPath();

   @ManyToOne
   public abstract ConsumerMapping getParent();

   /**
    * At this point, this RegistrationMapping should already have been added to its parent
    *
    * @param registration
    */
   public void initFrom(RegistrationSPI registration)
   {
      setStatus(registration.getStatus());
      setRegistrationHandle(registration.getRegistrationHandle());

      // clear and recreate portlet context mappings
      Collection<PortletContextMapping> contextMappings = getPortletContexts();
      contextMappings.clear();
      for (PortletContext portletContext : registration.getKnownPortletContexts())
      {
         String id = portletContext.getId();
         PortletContextMapping contextMapping = createPortletContext(id);
         contextMappings.add(contextMapping);

         if (portletContext instanceof StatefulPortletContext)
         {
            StatefulPortletContext context = (StatefulPortletContext)portletContext;
            if (PortletStateType.OPAQUE.equals(context.getType()))
            {
               contextMapping.initFrom(id, ((StatefulPortletContext<byte[]>)context).getState());
            }
            else
            {
               throw new IllegalArgumentException("Cannot handle PortletContext state: " + context.getState());
            }
         }
         else
         {
            contextMapping.initFrom(id, null);
         }
      }

      Map<QName, Object> properties = registration.getProperties();
      if (ParameterValidation.existsAndIsNotEmpty(properties))
      {
         // re-create properties all the time since a bug in Chromattic prevents us from properly re-initializing the properties
         RegistrationPropertiesMapping rpm = getProperties();
         if (rpm != null)
         {
            setProperties(null);
         }
         rpm = createProperties();
         setProperties(rpm);

         rpm.initFrom(properties);
      }
   }

   public RegistrationSPI toModel(RegistrationSPI initial, JCRRegistrationPersistenceManager persistenceManager)
   {
      ParameterValidation.throwIllegalArgExceptionIfNull(initial, "RegistrationSPI");

      initial.setStatus(getStatus());
      initial.setRegistrationHandle(getRegistrationHandle());
      initial.setPersistentKey(getPersistentKey());

      Collection<PortletContextMapping> pcms = getPortletContexts();
      for (PortletContextMapping pcm : pcms)
      {
         PortletContext pc = PortletContext.createPortletContext(pcm.getId(), IOTools.safeGetBytes(pcm.getState()));
         try
         {
            initial.addPortletContext(pc, false); // no need to save since we're loading from persistence :)
         }
         catch (RegistrationException e)
         {
            throw new RuntimeException(e);
         }
      }

      return initial;
   }

   public Class<RegistrationSPI> getModelClass()
   {
      return RegistrationSPI.class;
   }

   public RegistrationSPI toRegistration(ConsumerSPI consumer, JCRRegistrationPersistenceManager persistenceManager) throws RegistrationException
   {
      RegistrationPropertiesMapping rpm = getProperties();
      Map<QName, Object> props = Collections.emptyMap();
      if (rpm != null)
      {
         props = rpm.toPropMap();
      }

      RegistrationSPI reg = persistenceManager.newRegistrationSPI(consumer, props);
      return toModel(reg, persistenceManager);
   }
}