/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
 * as indicated by the @authors tag. All rights reserved.
 * See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * 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 org.jboss.arquillian.container.test.impl.enricher.resource;

import java.lang.annotation.Annotation;

import org.jboss.arquillian.container.spi.Container;
import org.jboss.arquillian.container.spi.ContainerRegistry;
import org.jboss.arquillian.container.spi.client.deployment.Deployment;
import org.jboss.arquillian.container.spi.client.deployment.DeploymentScenario;
import org.jboss.arquillian.container.spi.client.deployment.DeploymentTargetDescription;
import org.jboss.arquillian.container.spi.client.deployment.TargetDescription;
import org.jboss.arquillian.container.spi.context.ContainerContext;
import org.jboss.arquillian.container.spi.context.DeploymentContext;
import org.jboss.arquillian.container.test.api.OperateOnDeployment;
import org.jboss.arquillian.container.test.api.RunAsClient;
import org.jboss.arquillian.core.api.Instance;
import org.jboss.arquillian.core.api.annotation.Inject;
import org.jboss.arquillian.test.api.ArquillianResource;
import org.jboss.arquillian.test.spi.enricher.resource.ResourceProvider;

/**
 * OperatesOnDeploymentAwareProvider
 *
 * @author <a href="mailto:aslak@redhat.com">Aslak Knutsen</a>
 * @version $Revision: $
 */
public abstract class OperatesOnDeploymentAwareProvider implements ResourceProvider
{
   @Inject
   private Instance<ContainerContext> containerContext;

   @Inject
   private Instance<DeploymentContext> deploymentContext;

   @Inject
   private Instance<DeploymentScenario> deploymentScenario;

   @Inject
   private Instance<ContainerRegistry> containerRegistry;

   public abstract Object doLookup(ArquillianResource resource, Annotation... qualifiers);

   @Override
   public Object lookup(ArquillianResource resource, Annotation... qualifiers)
   {
      return runInDeploymentContext(resource, qualifiers);
   }

   private Object runInDeploymentContext(ArquillianResource resource, Annotation... qualifiers)
   {
      DeploymentContext context = null;
      DeploymentScenario scenario = null;
      boolean activateContext = containsOperatesOnDeployment(qualifiers);
      boolean contextActivated = false;
      try
      {
         Deployment deployment = null;
         if(activateContext)
         {
            context = deploymentContext.get();
            scenario = deploymentScenario.get();
            if(scenario == null)
            {
               throw new IllegalStateException("No " + DeploymentScenario.class.getSimpleName() + " found. " +
                     "Possible cause, @" + OperateOnDeployment.class.getSimpleName() + " is currently only supported on the client side. (@" + RunAsClient.class.getSimpleName() + ")");
            }
            OperateOnDeployment operatesOn = getOperatesOnDeployment(qualifiers);
            deployment = scenario.deployment(new DeploymentTargetDescription(operatesOn.value()));
            if(deployment == null)
            {
               throw new IllegalArgumentException(
                     "Could not operate on deployment (@" + OperateOnDeployment.class.getSimpleName() + "), " +
                     "no deployment found with name: " + operatesOn.value());
            }
            context.activate(deployment);
            contextActivated = true;
         }
         return runInContainerContext(deployment == null ? null:deployment.getDescription().getTarget(), resource, qualifiers);
      }
      finally
      {
         if(contextActivated)
         {
            context.deactivate();
         }
      }
   }

   private Object runInContainerContext(TargetDescription targetDescription, ArquillianResource resource, Annotation... qualifiers)
   {
      ContainerContext context = null;
      ContainerRegistry registry = null;
      boolean activateContext = targetDescription != null;
      boolean contextActivated = false;
      try
      {
         if(activateContext)
         {
            context = containerContext.get();
            registry = containerRegistry.get();
            if(registry == null)
            {
               throw new IllegalStateException("No " + ContainerRegistry.class.getSimpleName() + " found. " +
                     "Possible problem is, @" + OperateOnDeployment.class.getSimpleName() + " is currently only supported on the client side.");
            }
            Container container = registry.getContainer(targetDescription);
            if(container == null)
            {
               throw new IllegalArgumentException(
                     "Could not operate on deployment (@" + OperateOnDeployment.class.getSimpleName() + "), " +
                     "no container found with name: " + targetDescription);
            }
            context.activate(container.getName());
            contextActivated = true;
         }
         return doLookup(resource, qualifiers);
      }
      finally
      {
         if(contextActivated)
         {
            context.deactivate();
         }
      }
   }

   public boolean containsOperatesOnDeployment(Annotation[] qualifiers)
   {
      return getOperatesOnDeployment(qualifiers) != null;
   }

   private OperateOnDeployment getOperatesOnDeployment(Annotation[] qualifiers)
   {
      if(qualifiers != null)
      {
         for(Annotation annotation : qualifiers)
         {
            if(annotation.annotationType() == OperateOnDeployment.class)
            {
               return OperateOnDeployment.class.cast(annotation);
            }
         }
      }
      return null;
   }
}
