/*
    * JBoss, Home of Professional Open Source.
    * Copyright 2013, Red Hat Middleware LLC, and individual contributors
    * as indicated by the @author tags. See the copyright.txt file in the
    * distribution for a full listing of individual contributors.
    *
    * This is free software; you can redistribute it and/or modify it
    * under the terms of the GNU Lesser General Public License as
    * published by the Free Software Foundation; either version 2.1 of
   * the License, or (at your option) any later version.
   *
   * This software 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
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this software; if not, write to the Free
   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
   */
  package org.redhat.vmtruckloader.vmware.action;
  
  import java.rmi.RemoteException;
  
  import org.redhat.vmtruckloader.service.MachineSpecification;
  import org.redhat.vmtruckloader.vmware.VMWareMachineSpecsUtils;
  import org.redhat.vmtruckloader.vmware.VMWareManagedObjectUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.vmware.vim25.ConcurrentAccess;
  import com.vmware.vim25.DuplicateName;
  import com.vmware.vim25.FileFault;
  import com.vmware.vim25.InsufficientResourcesFault;
  import com.vmware.vim25.InvalidDatastore;
  import com.vmware.vim25.InvalidName;
  import com.vmware.vim25.InvalidState;
  import com.vmware.vim25.OptionValue;
  import com.vmware.vim25.RuntimeFault;
  import com.vmware.vim25.TaskInProgress;
  import com.vmware.vim25.VirtualMachineConfigSpec;
  import com.vmware.vim25.VmConfigFault;
  import com.vmware.vim25.mo.ServiceInstance;
  import com.vmware.vim25.mo.Task;
  import com.vmware.vim25.mo.VirtualMachine;
  
  /**
   * <p>Callback in charge of creating a new Machine</p>
   *
   * @author Romain Pelisse - <romain@redhat.com>
   *
   */
  public class EditMachineCallback extends AbstractVMWareActionCallback<VirtualMachine> {
  
  	private static final Logger LOGGER = LoggerFactory.getLogger(EditMachineCallback.class);
  
  	private final MachineSpecification spec;
  
  	public EditMachineCallback(MachineSpecification spec) {
  		this.spec = spec;
  	}
  
  	@Override
  	public VirtualMachine doInVmware(ServiceInstance serviceInstance) {		
  		return runTask(doesVMexistsAndCanItBeModified(serviceInstance, spec), VMWareMachineSpecsUtils.buildVmSpecAndSetCpusAndMemory(serviceInstance, spec));
  	}
  
  	private VirtualMachine doesVMexistsAndCanItBeModified(ServiceInstance serviceInstance, MachineSpecification machineCreateWrapper) {
  		final VirtualMachine vm = VMWareManagedObjectUtils.getVm(serviceInstance, machineCreateWrapper.getVmName());
  		if ( vm == null )
  			throw new IllegalArgumentException("No VM with name:" + machineCreateWrapper.getVmName() + " (rename operation are not supported).");
  		if ( vm.getSummary().getRuntime().getPowerState().toString() == "poweredOn" )
  			throw new IllegalArgumentException(" can't change the hardware settings for a running vm ... Stop vm first.");	
  		checkIfVMisNotStillDeploying(vm.getConfig().getExtraConfig());
  		return vm;
  	}
  	
  	private void checkIfVMisNotStillDeploying(OptionValue[] optionsValues) {	
  		for ( OptionValue optionValue : optionsValues ) {
  			if ( optionValue.getKey().equals("guestinfo.deploy.lock") && optionValue.getValue().equals("true") ) {
  				throw new IllegalArgumentException("VM " + spec.getVmName() +  
  						" is still in deployment state, please finish deployment first before changing hardware settings");
  			}
  		}
  	}
  
  	private VirtualMachine runTask(VirtualMachine vm, VirtualMachineConfigSpec vmSpec) {
  		try {
  			Task task = vm.reconfigVM_Task(vmSpec);
  			task.waitForTask();
  		} catch (InvalidName e) {
  			throw new IllegalArgumentException(e);
  		} catch (VmConfigFault e) {
  			throw new IllegalArgumentException(e);
  		} catch (DuplicateName e) {
  			throw new IllegalArgumentException(e);
  		} catch (TaskInProgress e) {
  			throw new IllegalStateException(e);
 		} catch (FileFault e) {
 			throw new IllegalStateException(e);
 		} catch (InvalidState e) {
 			throw new IllegalStateException(e);
 		} catch (ConcurrentAccess e) {
 			throw new IllegalStateException(e);
 		} catch (InvalidDatastore e) {
 			throw new IllegalStateException(e);
 		} catch (InsufficientResourcesFault e) {
 			throw new IllegalStateException(e);
 		} catch (RuntimeFault e) {
 			throw new IllegalStateException(e);
 		} catch (RemoteException e) {
 			throw new IllegalStateException(e);
 		} catch (InterruptedException e) {
 			if ( LOGGER.isWarnEnabled() )
 				LOGGER.warn("Remote Task on vCenter timeout.");
 		}
 		return vm;
 	}
 }