/*************************************************************************
 * Copyright 2009-2013 Eucalyptus Systems, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3 of the License.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/

package com.eucalyptus.loadbalancing;

import java.util.List;

import javax.persistence.CollectionTable;
import javax.persistence.Column;
import javax.persistence.ElementCollection;
import javax.persistence.Entity;
import javax.persistence.PersistenceContext;
import javax.persistence.PostLoad;
import javax.persistence.Table;
import javax.persistence.Transient;

import org.apache.log4j.Logger;
import com.eucalyptus.entities.AbstractPersistent;
import com.eucalyptus.loadbalancing.LoadBalancerPolicyAttributeTypeDescription.LoadBalancerPolicyAttributeTypeDescriptionCoreView;
import com.eucalyptus.loadbalancing.LoadBalancerPolicyAttributeTypeDescription.LoadBalancerPolicyAttributeTypeDescriptionCoreViewTransform;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;

@Entity
@PersistenceContext( name = "eucalyptus_loadbalancing" )
@Table( name = "metadata_policy_type_description" )
public class LoadBalancerPolicyTypeDescription extends AbstractPersistent{
	private static Logger    LOG     = Logger.getLogger( LoadBalancerPolicyTypeDescription.class );
	
	@Transient
	private static final long serialVersionUID = 1L;
	
	@Transient
	private LoadBalancerPolicyTypeDescriptionRelationView view = null;
	
	@Column( name = "description", nullable=true)
	private String description = null;
	
	@Column( name = "policy_type_name", nullable=true)
	private String policyTypeName = null;
	
	@ElementCollection
	@CollectionTable( name = "metadata_policy_attr_type_description" )
	private List<LoadBalancerPolicyAttributeTypeDescription> policyAttributeTypeDescriptions = null;
	
	public LoadBalancerPolicyTypeDescription(){ }
	
	public LoadBalancerPolicyTypeDescription(final String typeName){
	  this.policyTypeName = typeName;
	  this.view = new LoadBalancerPolicyTypeDescriptionRelationView(this);
	}
  
	public LoadBalancerPolicyTypeDescription(final String typeName, final String description){
    this(typeName);
    this.description = description;
  }
  
  public LoadBalancerPolicyTypeDescription(final String typeName, final String description, 
      final List<LoadBalancerPolicyAttributeTypeDescription> attributeTypes){
    this(typeName, description);
    this.policyAttributeTypeDescriptions = attributeTypes;
  }
  
  public static LoadBalancerPolicyTypeDescription named(final String typeName){
    return new LoadBalancerPolicyTypeDescription(typeName);
  }

  @PostLoad
  private void onLoad(){
    if(this.view==null)
      this.view = new LoadBalancerPolicyTypeDescriptionRelationView(this);
  }

	public String getPolicyTypeName(){
	  return this.policyTypeName;
	}
	
	public void setDescription(final String description){
	  this.description = description;
	}

	public String getDescription(){
	  return this.description;
	}
	
	public List<LoadBalancerPolicyAttributeTypeDescriptionCoreView> getPolicyAttributeTypeDescriptions(){
	  return this.view.getAttributeTypeDescription();
	}
	
	void addPolicyAttributeTypeDescription(final LoadBalancerPolicyAttributeTypeDescription attrDesc){
	  if(this.policyAttributeTypeDescriptions==null)
	    this.policyAttributeTypeDescriptions = Lists.newArrayList();
	  this.removePolicyAttributeTypeDescription(attrDesc);
	  this.policyAttributeTypeDescriptions.add(attrDesc);
	}
	
	void removePolicyAttributeTypeDescription(final LoadBalancerPolicyAttributeTypeDescription attrDesc){
	   if(this.policyAttributeTypeDescriptions==null)
	     return;
	   this.policyAttributeTypeDescriptions.remove(attrDesc);
	}
	
	@Override
	public String toString(){
	  return String.format("PolicyTypeDescription: %s", this.policyTypeName);
	}
	
	@Override
	public int hashCode(){
	  final int prime = 31;
    int result = 1;
    result = prime * result + ( ( this.policyTypeName == null )
      ? 0
      : this.policyTypeName.hashCode( ) );
    return result;
	}
	
	@Override
	public boolean equals(final Object obj){
	  if ( this == obj ) {
      return true;
    }
    if ( obj == null ) {
      return false;
    }
    if ( getClass( ) != obj.getClass( ) ) {
      return false;
    }
    LoadBalancerPolicyTypeDescription other = ( LoadBalancerPolicyTypeDescription ) obj;
    if ( this.policyTypeName == null ) {
      if ( other.policyTypeName != null ) {
        return false;
      }
    } else if ( !this.policyTypeName.equals( other.policyTypeName ) ) {
      return false;
    }
    
    return true;
	}
	
	public static class LoadBalancerPolicyTypeDescriptionRelationView {
	  private ImmutableList<LoadBalancerPolicyAttributeTypeDescriptionCoreView> attrTypeDescs = null;
	  
	  private LoadBalancerPolicyTypeDescriptionRelationView(final LoadBalancerPolicyTypeDescription policyDesc){
	    if(policyDesc.policyAttributeTypeDescriptions != null){
	      attrTypeDescs = ImmutableList.copyOf(Collections2.transform(policyDesc.policyAttributeTypeDescriptions,
	          LoadBalancerPolicyAttributeTypeDescriptionCoreViewTransform.INSTANCE));
	    }
	  }

	  public ImmutableList<LoadBalancerPolicyAttributeTypeDescriptionCoreView> getAttributeTypeDescription(){
	    return this.attrTypeDescs;
	  }
	}
}