/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.apache.activemq.transport.amqp.client;

import java.util.concurrent.atomic.AtomicReference;

import org.apache.qpid.proton.engine.Connection;
import org.apache.qpid.proton.engine.Delivery;
import org.apache.qpid.proton.engine.Receiver;
import org.apache.qpid.proton.engine.Sender;
import org.apache.qpid.proton.engine.Session;

/**
 * Abstract base for a validation hook that is used in tests to check
 * the state of a remote resource after a variety of lifecycle events.
 */
public class AmqpValidator {

   private AtomicReference<String> errorMessage = new AtomicReference<>();

   public void inspectOpenedResource(Connection connection) {

   }

   public void inspectOpenedResource(Session session) {

   }

   public void inspectOpenedResource(Sender sender) {

   }

   public void inspectOpenedResource(Receiver receiver) {

   }

   public void inspectClosedResource(Connection remoteConnection) {

   }

   public void inspectClosedResource(Session session) {

   }

   public void inspectClosedResource(Sender sender) {

   }

   public void inspectClosedResource(Receiver receiver) {

   }

   public void inspectDetachedResource(Sender sender) {

   }

   public void inspectDetachedResource(Receiver receiver) {

   }

   public void inspectDelivery(Receiver receiver, Delivery delivery) {

   }

   public void inspectDeliveryUpdate(Sender sender, Delivery delivery) {

   }

   public void inspectCredit(Sender sender) {

   }

   public boolean isValid() {
      return this.errorMessage.get() == null;
   }

   public final void clearErrorMessage() {
      errorMessage.set(null);
   }

   public final String getErrorMessage() {
      return errorMessage.get();
   }

   protected final boolean markAsInvalid(String message) {
      if (message == null) {
         throw new NullPointerException("Provided error message cannot be null!");
      }

      return errorMessage.compareAndSet(null, message);
   }

   public final void assertValid() {
      final String assertionErrorMessage = errorMessage.get();
      if (assertionErrorMessage != null) {
         throw new AssertionError(assertionErrorMessage);
      }
   }
}
