/*
    * Copyright (c) 2015 Cisco Systems, Inc.  All rights reserved.
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Public License v1.0 which accompanies this distribution,
    * and is available at http://www.eclipse.org/legal/epl-v10.html
    */
   
   package org.opendaylight.lispflowmapping.lisp.util;
  
  import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.Address;
  import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.SourceDestKey;
  import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.eid.container.Eid;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author Lorand Jakab
   *
   */
  
  public final class SourceDestKeyHelper {
      // Utility class, should not be instantiated
      private SourceDestKeyHelper() {
      }
  
      private final static Logger LOG = LoggerFactory.getLogger(SourceDestKeyHelper.class);
      public static Eid getSrc(Eid eid) {
          Address addr = eid.getAddress();
          if (addr instanceof SourceDestKey) {
              return LispAddressUtil.asEid(((SourceDestKey) addr).getSourceDestKey().getSource(),
                      eid.getVirtualNetworkId());
          } else {
              return eid;
          }
      }
  
      public static Eid getDst(Eid eid) {
          Address addr = eid.getAddress();
          if (addr instanceof SourceDestKey) {
              return LispAddressUtil.asEid(((SourceDestKey) addr).getSourceDestKey().getDest(),
                      eid.getVirtualNetworkId());
          } else {
              return eid;
          }
      }
  
      public static short getSrcMask(Eid eid) {
          Address addr = eid.getAddress();
          if (!isSrcDst(addr)) {
              return 0;
          }
          return MaskUtil.getMaskForAddress(((SourceDestKey)addr).getSourceDestKey().getSource());
      }
  
      public static short getDstMask(Eid eid) {
          Address addr = eid.getAddress();
          if (!isSrcDst(addr)) {
              return 0;
          }
          return MaskUtil.getMaskForAddress(((SourceDestKey)addr).getSourceDestKey().getDest());
      }
  
      private static boolean isSrcDst(Address addr) {
          if (!(addr instanceof SourceDestKey)) {
              LOG.warn("Address {} is not a valid SourceDest LCAF", addr);
              return false;
          }
          return true;
      }
  }