/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.virtualbox.functions;

import static org.easymock.EasyMock.*;
import static org.easymock.classextension.EasyMock.createMock;
import static org.easymock.classextension.EasyMock.createNiceMock;
import static org.easymock.classextension.EasyMock.replay;
import static org.easymock.classextension.EasyMock.verify;
import static org.virtualbox_4_1.NATProtocol.TCP;
import static org.virtualbox_4_1.NetworkAttachmentType.NAT;

import org.jclouds.virtualbox.domain.NatAdapter;
import org.testng.annotations.Test;
import org.virtualbox_4_1.IMachine;
import org.virtualbox_4_1.INATEngine;
import org.virtualbox_4_1.INetworkAdapter;
import org.virtualbox_4_1.VBoxException;

/**
 * @author Mattias Holmqvist
 */
@Test(groups = "unit", testName = "AttachNATAdapterToMachineIfNotAlreadyExistsTest")
public class AttachNATAdapterToMachineIfNotAlreadyExistsTest {

   @Test
   public void testApplyNetworkingToNonExistingAdapter() throws Exception {
      Long slotId = 0l;
      IMachine machine = createMock(IMachine.class);
      INetworkAdapter networkAdapter = createMock(INetworkAdapter.class);
      INATEngine natEngine = createMock(INATEngine.class);

      expect(machine.getNetworkAdapter(slotId)).andReturn(networkAdapter);
      networkAdapter.setAttachmentType(NAT);
      expect(networkAdapter.getNatDriver()).andReturn(natEngine);
      
      natEngine.addRedirect("TCP@127.0.0.1:2222->:22", TCP, "127.0.0.1", 2222, "", 22);
      networkAdapter.setEnabled(true);
      machine.saveSettings();

      replay(machine, networkAdapter, natEngine);
      NatAdapter natAdapter = NatAdapter.builder().tcpRedirectRule("127.0.0.1", 2222, "", 22).build();
      new AttachNATAdapterToMachineIfNotAlreadyExists(slotId, natAdapter).apply(machine);

      verify(machine, networkAdapter, natEngine);
   }

   @Test
   public void testApplySkipsWhenAlreadyExists() throws Exception {
      Long slotId = 0l;
      IMachine machine = createMock(IMachine.class);
      INetworkAdapter networkAdapter = createMock(INetworkAdapter.class);
      INATEngine natEngine = createMock(INATEngine.class);

      expect(machine.getNetworkAdapter(slotId)).andReturn(networkAdapter);
      networkAdapter.setAttachmentType(NAT);
      expect(networkAdapter.getNatDriver()).andReturn(natEngine);
      
      natEngine.addRedirect("TCP@127.0.0.1:2222->:22", TCP, "127.0.0.1", 2222, "", 22);
      expectLastCall().andThrow(
               new VBoxException(null, "VirtualBox error: A NAT rule of this name already exists (0x80070057)"));      
      
      networkAdapter.setEnabled(true);
      machine.saveSettings();

      replay(machine, networkAdapter, natEngine);
      NatAdapter natAdapter = NatAdapter.builder().tcpRedirectRule("127.0.0.1", 2222, "", 22).build();
      new AttachNATAdapterToMachineIfNotAlreadyExists(slotId, natAdapter).apply(machine);

      verify(machine, networkAdapter, natEngine);
   }
   
   @Test(expectedExceptions = VBoxException.class)
   public void testRethrowInvalidAdapterSlotException() throws Exception {
      Long slotId = 30l;
      IMachine machine = createMock(IMachine.class);
      INetworkAdapter networkAdapter = createMock(INetworkAdapter.class);
      INATEngine natEngine = createMock(INATEngine.class);

      String error = "VirtualBox error: Argument slot is invalid "
            + "(must be slot < RT_ELEMENTS(mNetworkAdapters)) (0x80070057)";

      VBoxException invalidSlotException = new VBoxException(createNiceMock(Throwable.class), error);
      expect(machine.getNetworkAdapter(slotId)).andThrow(invalidSlotException);

      replay(machine, networkAdapter, natEngine);

      NatAdapter natAdapter = NatAdapter.builder().tcpRedirectRule("127.0.0.1", 2222, "", 22).build();
      new AttachNATAdapterToMachineIfNotAlreadyExists(slotId, natAdapter).apply(machine);

      verify(machine, networkAdapter, natEngine);
   }

}
