/*
 * Copyright 2006 The Apache Software Foundation or its licensors, as
 * applicable.
 *
 * 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.
 */
using System;
using System.IO;

using NUnit.Framework;

using OpenWire.Client;
using OpenWire.Client.Core;
using System.Collections;

namespace OpenWire.Client
{
    [TestFixture]
    public class TransactionTest : TestSupport
    {
        private static int destinationCounter;
        
        IDestination destination;
        IConnection connection;
        ISession session;
        IMessageProducer producer;
        IMessageConsumer consumer;
        
        [SetUp]
        public void SetUp()
        {
            Connect();
            
            // lets consume any outstanding messages from previous test runs
            while (consumer.Receive(1000) != null)
            {
            }
            session.Commit();
        }
        
        
        
        [TearDown]
        public void TearDown()
        {
            Disconnect();
        }
        
        [Test]
        public void TestSendRollback()
        {
            IMessage[] outbound = new IMessage[]{
                session.CreateTextMessage("First Message"),
                session.CreateTextMessage("Second Message")
            };
            
            //sends a message
            producer.Send(outbound[0]);
            session.Commit();
            
            //sends a message that gets rollbacked
            producer.Send(session.CreateTextMessage("I'm going to get rolled back."));
            session.Rollback();
            
            //sends a message
            producer.Send(outbound[1]);
            session.Commit();
            
            //receives the first message
            ArrayList messages = new ArrayList();
            Console.WriteLine("About to consume message 1");
            IMessage message = consumer.Receive(1000);
            messages.Add(message);
            Console.WriteLine("Received: " + message);
            
            //receives the second message
            Console.WriteLine("About to consume message 2");
            message = consumer.Receive(4000);
            messages.Add(message);
            Console.WriteLine("Received: " + message);
            
            //validates that the rollbacked was not consumed
            session.Commit();
            IMessage[] inbound = new IMessage[messages.Count];
            messages.CopyTo(inbound);
            AssertTextMessagesEqual("Rollback did not work.", outbound, inbound);
        }
        
        [Test]
        public void TestSendSessionClose()
        {
            IMessage[] outbound = new IMessage[]{
                session.CreateTextMessage("First Message"),
                session.CreateTextMessage("Second Message")
            };
            
            //sends a message
            producer.Send(outbound[0]);
            session.Commit();
            
            //sends a message that gets rollbacked
            producer.Send(session.CreateTextMessage("I'm going to get rolled back."));
            consumer.Dispose();
            session.Dispose();
            
            Reconnect();
            
            //sends a message
            producer.Send(outbound[1]);
            session.Commit();
            
            //receives the first message
            ArrayList messages = new ArrayList();
            Console.WriteLine("About to consume message 1");
            IMessage message = consumer.Receive(1000);
            messages.Add(message);
            Console.WriteLine("Received: " + message);
            
            //receives the second message
            Console.WriteLine("About to consume message 2");
            message = consumer.Receive(4000);
            messages.Add(message);
            Console.WriteLine("Received: " + message);
            
            //validates that the rollbacked was not consumed
            session.Commit();
            IMessage[] inbound = new IMessage[messages.Count];
            messages.CopyTo(inbound);
            AssertTextMessagesEqual("Rollback did not work.", outbound, inbound);
        }
        
        [Test]
        public void TestReceiveRollback()
        {
            IMessage[] outbound = new IMessage[]{
                session.CreateTextMessage("First Message"),
                session.CreateTextMessage("Second Message")
            };
            
            //sent both messages
            producer.Send(outbound[0]);
            producer.Send(outbound[1]);
            session.Commit();
            
            Console.WriteLine("Sent 0: " + outbound[0]);
            Console.WriteLine("Sent 1: " + outbound[1]);
            
            ArrayList messages = new ArrayList();
            IMessage message = consumer.Receive(1000);
            messages.Add(message);
            Assert.AreEqual(outbound[0], message);
            session.Commit();
            
            // rollback so we can get that last message again.
            message = consumer.Receive(1000);
            Assert.IsNotNull(message);
            Assert.AreEqual(outbound[1], message);
            session.Rollback();
            
            // Consume again.. the previous message should
            // get redelivered.
            message = consumer.Receive(5000);
            Assert.IsNotNull(message, "Should have re-received the message again!");
            messages.Add(message);
            session.Commit();
            
            IMessage[] inbound = new IMessage[messages.Count];
            messages.CopyTo(inbound);
            AssertTextMessagesEqual("Rollback did not work", outbound, inbound);
        }
        
        
        [Test]
        public void TestReceiveTwoThenRollback()
        {
            IMessage[] outbound = new IMessage[]{
                session.CreateTextMessage("First Message"),
                session.CreateTextMessage("Second Message")
            };
            
            producer.Send(outbound[0]);
            producer.Send(outbound[1]);
            session.Commit();
            
            Console.WriteLine("Sent 0: " + outbound[0]);
            Console.WriteLine("Sent 1: " + outbound[1]);
            
            ArrayList messages = new ArrayList();
            IMessage message = consumer.Receive(1000);
            AssertTextMessageEqual("first mesage received before rollback", outbound[0], message);
            
            message = consumer.Receive(1000);
            Assert.IsNotNull(message);
            AssertTextMessageEqual("second message received before rollback", outbound[1], message);
            session.Rollback();
            
            // Consume again.. the previous message should
            // get redelivered.
            message = consumer.Receive(5000);
            Assert.IsNotNull(message, "Should have re-received the first message again!");
            messages.Add(message);
            AssertTextMessageEqual("first message received after rollback", outbound[0], message);
            
            message = consumer.Receive(5000);
            Assert.IsNotNull(message, "Should have re-received the second message again!");
            messages.Add(message);
            AssertTextMessageEqual("second message received after rollback", outbound[1], message);
            
            Assert.IsNull(consumer.ReceiveNoWait());
            session.Commit();
            
            IMessage[] inbound = new IMessage[messages.Count];
            messages.CopyTo(inbound);
            AssertTextMessagesEqual("Rollback did not work", outbound, inbound);
        }
        
        protected override string CreateDestinationName()
        {
            // TODO - how can we get the test name?
            return base.CreateDestinationName() + (++destinationCounter);
        }
        
        protected void AssertTextMessagesEqual(String message, IMessage[] expected, IMessage[] actual)
        {
            Assert.AreEqual(expected.Length, actual.Length, "Incorrect number of messages received");
            
            for (int i = 0; i < expected.Length; i++)
            {
                AssertTextMessageEqual(message + ". Index: " + i, expected[i], actual[i]);
            }
        }
        
        protected void AssertTextMessageEqual(String message, IMessage expected, IMessage actual)
        {
            Assert.IsTrue(expected is ITextMessage, "expected object not a text message");
            Assert.IsTrue(actual is ITextMessage, "actual object not a text message");
            
            String expectedText = ((ITextMessage) expected).Text;
            String actualText = ((ITextMessage) actual).Text;
            
            Assert.AreEqual(expectedText, actualText, message);
        }
        
        protected void Connect()
        {
            IConnectionFactory factory = new ConnectionFactory("localhost", 61616);
            
            connection = factory.CreateConnection();
            
            session = connection.CreateSession(AcknowledgementMode.Transactional);
            
            // reuse the same destination if we reconnect
            if (destination == null)
            {
                destination = CreateDestination(session);
            }
            
            consumer = session.CreateConsumer(destination);
            
            producer = session.CreateProducer(destination);
        }
        
        
        protected void Disconnect()
        {
            if (connection != null)
            {
                connection.Dispose();
                connection = null;
            }
        }
        
        protected void Reconnect()
        {
            Disconnect();
            Connect();
        }
        
    }
}