/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package org.jclouds.openstack.nova.v2_0.domain;

import static com.google.common.base.Preconditions.checkNotNull;

import java.beans.ConstructorProperties;

import javax.inject.Named;

import com.google.common.base.MoreObjects;
import com.google.common.base.Objects;
import com.google.common.base.MoreObjects.ToStringHelper;

/**
 * Represents a Virtual Interface (VIF)
 * 
 * @see org.jclouds.openstack.nova.v2_0.extensions.VirtualInterfaceApi
*/
public class VirtualInterface {

   public static Builder<?> builder() { 
      return new ConcreteBuilder();
   }
   
   public Builder<?> toBuilder() { 
      return new ConcreteBuilder().fromVirtualInterface(this);
   }

   public abstract static class Builder<T extends Builder<T>>  {
      protected abstract T self();

      protected String id;
      protected String macAddress;
   
      /** 
       * @see VirtualInterface#getId()
       */
      public T id(String id) {
         this.id = id;
         return self();
      }

      /** 
       * @see VirtualInterface#getMacAddress()
       */
      public T macAddress(String macAddress) {
         this.macAddress = macAddress;
         return self();
      }

      public VirtualInterface build() {
         return new VirtualInterface(id, macAddress);
      }
      
      public T fromVirtualInterface(VirtualInterface in) {
         return this
                  .id(in.getId())
                  .macAddress(in.getMacAddress());
      }
   }

   private static class ConcreteBuilder extends Builder<ConcreteBuilder> {
      @Override
      protected ConcreteBuilder self() {
         return this;
      }
   }

   private final String id;
   @Named("mac_address")
   private final String macAddress;

   @ConstructorProperties({
      "id", "mac_address"
   })
   protected VirtualInterface(String id, String macAddress) {
      this.id = checkNotNull(id, "id");
      this.macAddress = checkNotNull(macAddress, "macAddress");
   }

   public String getId() {
      return this.id;
   }

   public String getMacAddress() {
      return this.macAddress;
   }

   @Override
   public int hashCode() {
      return Objects.hashCode(id, macAddress);
   }

   @Override
   public boolean equals(Object obj) {
      if (this == obj) return true;
      if (obj == null || getClass() != obj.getClass()) return false;
      VirtualInterface that = VirtualInterface.class.cast(obj);
      return Objects.equal(this.id, that.id)
               && Objects.equal(this.macAddress, that.macAddress);
   }
   
   protected ToStringHelper string() {
      return MoreObjects.toStringHelper(this)
            .add("id", id).add("macAddress", macAddress);
   }
   
   @Override
   public String toString() {
      return string().toString();
   }

}