/*
    * Copyright 2013 smartics, Kronseder & Reiner GmbH
    *
    * Licensed 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 de.smartics.properties.jboss.extension.resources;
  
  import org.jboss.as.controller.AbstractWriteAttributeHandler;
  import org.jboss.as.controller.OperationContext;
  import org.jboss.as.controller.OperationFailedException;
  import org.jboss.dmr.ModelNode;
  
  import de.smartics.properties.spi.config.config.ExtensionConfiguration;
  import de.smartics.properties.spi.config.config.PropertiesConfiguration;
  
  /**
   * The attribute handler for the properties configuration resource.
   */
  public final class PropertiesConfigurationResourceAttributeHandler extends
      AbstractWriteAttributeHandler<ExtensionConfiguration>
  {
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    /**
     * The attribute handler singleton.
     */
    public static final PropertiesConfigurationResourceAttributeHandler INSTANCE =
        new PropertiesConfigurationResourceAttributeHandler();
  
    // --- members --------------------------------------------------------------
  
    // ****************************** Initializer *******************************
  
    // ****************************** Constructors ******************************
  
    /**
     * Default constructor.
     */
    private PropertiesConfigurationResourceAttributeHandler()
    {
    }
  
    // ****************************** Inner Classes *****************************
  
    // ********************************* Methods ********************************
  
    // --- init -----------------------------------------------------------------
  
    // --- get&set --------------------------------------------------------------
  
    // --- business -------------------------------------------------------------
  
    @Override
    protected boolean applyUpdateToRuntime(
        final OperationContext context,
        final ModelNode operation,
        final String attributeName,
        final ModelNode resolvedValue,
        final ModelNode currentValue,
        final AbstractWriteAttributeHandler.HandbackHolder<ExtensionConfiguration> handbackHolder)
      throws OperationFailedException
    {
      if (attributeName.equals(PropertiesConfigurationResourceDefinition.AN_NAME))
      {
        final ExtensionConfigurationService service =
            (ExtensionConfigurationService) context.getServiceRegistry(true)
                .getRequiredService(ExtensionConfigurationService.SERVICE_NAME)
                .getValue();
  
        final String name = currentValue.asString();
  
        final String newValue = resolvedValue.asString();
        final PropertiesConfiguration configuration =
            service.removeConfiguration(name);
        if (configuration == null)
        {
          throw new OperationFailedException(
              "Cannot find smartics-properties configuration with name '" + name
                  + "'.");
        }
  
        configuration.setName(newValue);
        service.addConfiguration(configuration);
  
        handbackHolder.setHandback(service.getValue());
        context.completeStep();
      }
 
     return false;
   }
 
   @Override
   protected void revertUpdateToRuntime(final OperationContext context,
       final ModelNode operation, final String attributeName,
       final ModelNode valueToRestore, final ModelNode valueToRevert,
       final ExtensionConfiguration handback) throws OperationFailedException
   {
     if (handback != null)
     {
       final String oldValue = valueToRestore.asString();
 
       final String newValue = valueToRevert.asString();
       final PropertiesConfiguration configuration =
           handback.removeConfiguration(oldValue);
       if (configuration == null)
       {
         throw new OperationFailedException(String.format(
             "Cannot find smartics-properties configuration with"
                 + " name '%' to revert to '%s'.", oldValue, newValue));
       }
       configuration.setName(newValue);
       handback.addConfiguration(configuration);
 
       context.completeStep();
     }
   }
 
   // --- object basics --------------------------------------------------------
 
 }