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/***********************************************************************************************************************
 *
 * forceTen - open source geography
 * Copyright (C) 2007-2012 by Tidalwave s.a.s. (http://www.tidalwave.it)
 *
 ***********************************************************************************************************************
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 *
 ***********************************************************************************************************************
 *
 * WWW: http://forceten.tidalwave.it
 * SCM: https://bitbucket.org/tidalwave/forceten-src
 *
 **********************************************************************************************************************/
package it.tidalwave.geo.geocoding.impl;

import javax.annotation.CheckForNull;
import javax.annotation.Nonnull;
import javax.xml.namespace.QName;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;
import java.io.Serializable;
import org.openide.util.Lookup;
import org.openide.util.Parameters;
import org.openide.util.lookup.Lookups;
import it.tidalwave.util.As;
import it.tidalwave.util.As.NotFoundBehaviour;
import it.tidalwave.util.Finder;
import it.tidalwave.util.NotFoundException;
import it.tidalwave.role.spi.DefaultDisplayable;
import it.tidalwave.netbeans.util.Locator;
import it.tidalwave.netbeans.capabilitiesprovider.LookupFactory;
import it.tidalwave.geo.Coordinate;
import it.tidalwave.geo.geocoding.GeoCoder;
import it.tidalwave.geo.geocoding.GeoCoderEntity;
import it.tidalwave.geo.geocoding.GeoCoderManager;
import static it.tidalwave.role.Displayable.Displayable;

/***********************************************************************************************************************
 *
 * @author Fabrizio Giudici
 * @version $Id$
 *
 **********************************************************************************************************************/
public class DefaultGeoCoderEntity implements GeoCoderEntity
  {
    private static final long serialVersionUID = 906839684954745845L;

    @CheckForNull @edu.umd.cs.findbugs.annotations.SuppressWarnings("SE_TRANSIENT_FIELD_NOT_RESTORED")
    protected transient GeoCoder geoCoder;

    private final String geoCoderName;
    
    private Finder children;
    
    private boolean childrenLoaded = false;
    
    @CheckForNull 
    /* package */ GeoCoderEntity parent;

    @Nonnull
    private final String id;

    @Nonnull
    private final String code;

    @Nonnull
    private final String typeAsString;

    @Nonnull
    private final Coordinate coordinate;
    
    private boolean parentSearched = false;

    @CheckForNull @edu.umd.cs.findbugs.annotations.SuppressWarnings("SE_TRANSIENT_FIELD_NOT_RESTORED")
    /* package */ transient Lookup lookup;

    private final List capabilities = new ArrayList();

    private final DefaultDisplayable displayable;

    /*******************************************************************************************************************
     *
     *
     ******************************************************************************************************************/
    public DefaultGeoCoderEntity (final @Nonnull GeoCoder geoCoder,
                                  final @CheckForNull GeoCoderEntity parent,
                                  final @Nonnull String id,
                                  final @Nonnull String displayName,
                                  final @Nonnull Coordinate coordinate,
                                  final @Nonnull String code,
                                  final @Nonnull String typeAsString,
                                  final @Nonnull Serializable[] capabilities)
      {
        Parameters.notNull("id", id);
        
        this.geoCoder = geoCoder;
        this.parent = parent;
        this.id = id;
        this.displayable = new DefaultDisplayable(displayName, "DefaultGeoCoderEntity");
        this.coordinate = coordinate;
        this.code = code;
        this.typeAsString = typeAsString;
        this.geoCoderName = geoCoder.getName();
        this.capabilities.addAll(Arrays.asList(capabilities));
        this.capabilities.addAll(Arrays.asList(coordinate, displayable, new QName(geoCoder.getId() + id + "/")));
      }
    
    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public synchronized GeoCoder getGeoCoder()
      {
        if (geoCoder == null)
          {
            try
              {
                geoCoder = Locator.find(GeoCoderManager.class).findGeoCoderByName(geoCoderName);
              }
            catch (NotFoundException e)
              {
                throw new IllegalStateException(e);
              }
          }

        return geoCoder;
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public String getId()
      {
        return id;
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public Coordinate getCoordinate()
      {
        return coordinate;
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public String getCode() 
      {
        return code;
      }
    
    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public String getTypeAsString()
      {
        return typeAsString;
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public Type getType()
      {
        return getGeoCoder().typeFromString(typeAsString);
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public synchronized Finder findChildren()
      {
        if (!childrenLoaded)
          {
            children = getGeoCoder().findChildren(id);
            childrenLoaded = true;
          }
        
        return children;
      }

    /*******************************************************************************************************************
     *
     * FIXME: this setter is the only not immutable part of this class. Drop it.
     * I think it's only needed for lazy exploring of parents, but we could move
     * the logic to getParent().
     *
     ******************************************************************************************************************/
    public void setParent (final @Nonnull GeoCoderEntity parent)
      {
        this.parent = parent;
      }
    
    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public GeoCoderEntity getParent()
      throws NotFoundException
      {
        if ((parent == null) && !parentSearched)
          {
            getGeoCoder().findGeoEntityById(id); // this will set my parent as a side-effect
            parentSearched = true; // needed since e.g. Europe has a null parent
          }
        
        return NotFoundException.throwWhenNull(parent, "No parent for " + this);
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public boolean isParentSet()
      {
        return parentSearched;
      }
    
    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public String toString()
      {
        return String.format("DefaultGeoCoderEntity@%x[%s, %s]",
                             System.identityHashCode(this), id, displayable.getDisplayName());
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public boolean equals (final @CheckForNull Object object)
      {
        if (object == null)
          {
            return false;
          }
        
        if (getClass() != object.getClass())
          {
            return false;
          }
        
        final DefaultGeoCoderEntity other = (DefaultGeoCoderEntity)object;
        return this.id.equals(other.id);
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public int hashCode() 
      {
        return id.hashCode();
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override
    public int compareTo (final @Nonnull GeoCoderEntity geoCoderEntity)
      {
        return displayable.getDisplayName().compareTo(geoCoderEntity.as(Displayable).getDisplayName());
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public  T as (final @Nonnull Class clazz)
      {
        return as(clazz, As.Defaults.throwAsException(clazz));
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public  T as (final @Nonnull Class clazz,
                     final @Nonnull NotFoundBehaviour notFoundBehaviour)
      {
        final T as = getLookup().lookup(clazz);

        if (as != null)
          {
            return as;
          }
        else
          {
            return notFoundBehaviour.run(null);
          }
      }

    /*******************************************************************************************************************
     *
     * {@inheritDoc}
     *
     ******************************************************************************************************************/
    @Override @Nonnull
    public synchronized Lookup getLookup()
      {
        if (lookup == null) // also after serialization
          {
            lookup = LookupFactory.createLookup(this, Lookups.fixed(capabilities.toArray()));
          }

        return lookup;
      }
  }




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