/*
 * 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.
 */
using System;
using Apache.NMS.Policies;

namespace Apache.NMS.MSMQ
{
    /// <summary>
    /// A Factory that can estbalish NMS connections to MSMQ
    /// </summary>
    public class ConnectionFactory : IConnectionFactory
    {
        public const string DEFAULT_BROKER_URL = "msmq://localhost";
        public const string ENV_BROKER_URL = "MSMQ_BROKER_URL";
        private Uri brokerUri;
        private IRedeliveryPolicy redeliveryPolicy = new RedeliveryPolicy();

        public static string GetDefaultBrokerUrl()
        {
            string answer = Environment.GetEnvironmentVariable(ENV_BROKER_URL);
            if(answer == null)
            {
                answer = DEFAULT_BROKER_URL;
            }
            return answer;
        }

        public ConnectionFactory()
            : this(GetDefaultBrokerUrl())
        {
        }

        public ConnectionFactory(string brokerUri)
            : this(brokerUri, null)
        {
        }

        public ConnectionFactory(string brokerUri, string clientID)
            : this(new Uri(brokerUri), clientID)
        {
        }

        public ConnectionFactory(Uri brokerUri)
            : this(brokerUri, null)
        {
        }

        public ConnectionFactory(Uri brokerUri, string clientID)
        {
            this.brokerUri = brokerUri;
        }

        /// <summary>
        /// Creates a new connection to MSMQ.
        /// </summary>
        public IConnection CreateConnection()
        {
            return CreateConnection(string.Empty, string.Empty, false);
        }

        /// <summary>
        /// Creates a new connection to MSMQ.
        /// </summary>
        public IConnection CreateConnection(string userName, string password)
        {
            return CreateConnection(userName, password, false);
        }

        /// <summary>
        /// Creates a new connection to MSMQ.
        /// </summary>
        public IConnection CreateConnection(string userName, string password, bool useLogging)
        {
            IConnection connection = new Connection();

            connection.RedeliveryPolicy = this.redeliveryPolicy.Clone() as IRedeliveryPolicy;
            connection.ConsumerTransformer = this.consumerTransformer;
            connection.ProducerTransformer = this.producerTransformer;

            return connection;
        }

        /// <summary>
        /// Get/or set the broker Uri.
        /// </summary>
        public Uri BrokerUri
        {
            get { return brokerUri; }
            set { brokerUri = value; }
        }

        /// <summary>
        /// Get/or set the redelivery policy that new IConnection objects are
        /// assigned upon creation.
        /// </summary>
        public IRedeliveryPolicy RedeliveryPolicy
        {
            get { return this.redeliveryPolicy; }
            set
            {
                if(value != null)
                {
                    this.redeliveryPolicy = value;
                }
            }
        }

        private ConsumerTransformerDelegate consumerTransformer;
        public ConsumerTransformerDelegate ConsumerTransformer
        {
            get { return this.consumerTransformer; }
            set { this.consumerTransformer = value; }
        }

        private ProducerTransformerDelegate producerTransformer;
        public ProducerTransformerDelegate ProducerTransformer
        {
            get { return this.producerTransformer; }
            set { this.producerTransformer = value; }
        }

    }
}