/*
 * 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.
 */

#ifndef _ACTIVEMQ_CORE_KERNELS_ACTIVEMQPRODUCERKERNEL_H_
#define _ACTIVEMQ_CORE_KERNELS_ACTIVEMQPRODUCERKERNEL_H_

#include <cms/MessageProducer.h>
#include <cms/Message.h>
#include <cms/Destination.h>
#include <cms/DeliveryMode.h>
#include <cms/MessageTransformer.h>

#include <activemq/util/Config.h>
#include <activemq/util/MemoryUsage.h>
#include <activemq/util/LongSequenceGenerator.h>
#include <activemq/commands/ProducerInfo.h>
#include <activemq/commands/ProducerAck.h>
#include <activemq/exceptions/ActiveMQException.h>

#include <memory>

namespace activemq {
namespace core {
namespace kernels {

    using decaf::lang::Pointer;

    class ActiveMQSessionKernel;

    class AMQCPP_API ActiveMQProducerKernel : public cms::MessageProducer {
    private:

        // Disable sending timestamps
        bool disableTimestamps;

        // Disable adding a Message Id
        bool disableMessageId;

        // The default delivery Mode of this Producer
        int defaultDeliveryMode;

        // The default priority Level to send at
        int defaultPriority;

        // The default time to live value for messages in milliseconds
        long long defaultTimeToLive;

        // The default Send Timeout for this Producer.
        long long sendTimeout;

        // Session that this producer sends to.
        ActiveMQSessionKernel* session;

        // This Producers protocol specific info object
        Pointer<commands::ProducerInfo> producerInfo;

        // Boolean that indicates if the consumer has been closed
        bool closed;

        // Memory Usage Class, created only if the Producer is tracking its usage.
        std::auto_ptr<util::MemoryUsage> memoryUsage;

        // The Destination assigned at creation, NULL if not assigned.
        Pointer<cms::Destination> destination;

        // Generator of Message Sequence Id numbers for this producer.
        util::LongSequenceGenerator messageSequence;

        // Used to tranform Message before sending them to the CMS bus.
        cms::MessageTransformer* transformer;

    private:

        ActiveMQProducerKernel(const ActiveMQProducerKernel&);
        ActiveMQProducerKernel& operator=(const ActiveMQProducerKernel&);

    public:

        /**
         * Constructor, creates an instance of an ActiveMQProducerKernel
         *
         * @param session
         *        The Session which is the parent of this Producer.
         * @param parent
         *        Pointer to the cms::MessageProducer that will wrap this kernel object.
         * @param producerId
         *        Pointer to a ProducerId object which identifies this producer.
         * @param destination
         *        The assigned Destination this Producer sends to, or null if not set.
         *        The Producer does not own the Pointer passed.
         * @param sendTimeout
         *        The configured send timeout for this Producer.
         */
        ActiveMQProducerKernel(ActiveMQSessionKernel* session,
                               const Pointer<commands::ProducerId>& producerId,
                               const Pointer<commands::ActiveMQDestination>& destination,
                               long long sendTimeout);

        virtual ~ActiveMQProducerKernel();

    public:  // cms::MessageProducer methods.

        virtual void close();

        virtual void send(cms::Message* message);

        virtual void send(cms::Message* message, cms::AsyncCallback* callback);

        virtual void send(cms::Message* message, int deliveryMode, int priority, long long timeToLive);

        virtual void send(cms::Message* message, int deliveryMode, int priority, long long timeToLive, cms::AsyncCallback* callback);

        virtual void send(const cms::Destination* destination, cms::Message* message);

        virtual void send(const cms::Destination* destination, cms::Message* message, cms::AsyncCallback* callback);

        virtual void send(const cms::Destination* destination, cms::Message* message,
                          int deliveryMode, int priority, long long timeToLive);

        virtual void send(const cms::Destination* destination, cms::Message* message,
                          int deliveryMode, int priority, long long timeToLive, cms::AsyncCallback* callback);

        /**
         * Set an MessageTransformer instance that is applied to all cms::Message objects before they
         * are sent on to the CMS bus.
         *
         * @param transformer
         *      Pointer to the cms::MessageTransformer to apply on each cms:;MessageSend.
         */
        virtual void setMessageTransformer(cms::MessageTransformer* transformer) {
            this->transformer = transformer;
        }

        /**
         * Gets the currently configured MessageTransformer for this MessageProducer.
         *
         * @returns the pointer to the currently set cms::MessageTransformer.
         */
        virtual cms::MessageTransformer* getMessageTransformer() const {
            return this->transformer;
        }

        /**
         * Sets the delivery mode for this Producer
         * @param mode - The DeliveryMode to use for Message sends.
         */
        virtual void setDeliveryMode(int mode) {
            this->defaultDeliveryMode = mode;
        }

        /**
         * Gets the delivery mode for this Producer
         * @return The DeliveryMode
         */
        virtual int getDeliveryMode() const {
            return this->defaultDeliveryMode;
        }

        /**
         * Sets if Message Ids are disabled for this Producer
         * @param value - boolean indicating enable / disable (true / false)
         */
        virtual void setDisableMessageID(bool value) {
            this->disableMessageId = value;
        }

        /**
         * Gets if Message Ids are disabled for this Producer
         * @return a boolean indicating state enable / disable (true / false) for MessageIds.
         */
        virtual bool getDisableMessageID() const {
            return this->disableMessageId;
        }

        /**
         * Sets if Message Time Stamps are disabled for this Producer
         * @param value - boolean indicating enable / disable (true / false)
         */
        virtual void setDisableMessageTimeStamp(bool value) {
            this->disableTimestamps = value;
        }

        /**
         * Gets if Message Time Stamps are disabled for this Producer
         * @returns boolean indicating state of enable / disable (true / false)
         */
        virtual bool getDisableMessageTimeStamp() const {
            return this->disableTimestamps;
        }

        /**
         * Sets the Priority that this Producers sends messages at
         * @param priority int value for Priority level
         */
        virtual void setPriority(int priority) {
            this->defaultPriority = priority;
        }

        /**
         * Gets the Priority level that this producer sends messages at
         * @return int based priority level
         */
        virtual int getPriority() const {
            return this->defaultPriority;
        }

        /**
         * Sets the Time to Live that this Producers sends messages with
         * @param time The new default time to live value in milliseconds.
         */
        virtual void setTimeToLive(long long time) {
            this->defaultTimeToLive = time;
        }

        /**
         * Gets the Time to Live that this producer sends messages with
         * @return The default time to live value in milliseconds.
         */
        virtual long long getTimeToLive() const {
            return this->defaultTimeToLive;
        }

        /**
         * Sets the Send Timeout that this Producers sends messages with
         * @param time The new default send timeout value in milliseconds.
         */
        virtual void setSendTimeout(long long time) {
            this->sendTimeout = time;
        }

        /**
         * Gets the Send Timeout that this producer sends messages with
         * @return The default send timeout value in milliseconds.
         */
        virtual long long getSendTimeout() const {
            return this->sendTimeout;
        }

        /**
         * @returns true if this Producer has been closed.
         */
        bool isClosed() const {
            return this->closed;
        }

        /**
         * Retries this object ProducerInfo pointer
         * @return ProducerInfo Reference
         */
        const Pointer<commands::ProducerInfo>& getProducerInfo() const {
            this->checkClosed();
            return this->producerInfo;
        }

        /**
         * Retries this object ProducerId or NULL if closed.
         * @return ProducerId Reference
         */
        const Pointer<commands::ProducerId>& getProducerId() const {
            this->checkClosed();
            return this->producerInfo->getProducerId();
        }

        /**
         * Handles the work of Processing a ProducerAck Command from the Broker.
         * @param ack - The ProducerAck message received from the Broker.
         */
        virtual void onProducerAck(const commands::ProducerAck& ack);

        /**
         * Performs Producer object cleanup but doesn't attempt to send the Remove command
         * to the broker.  Called when the parent resource if closed first to avoid the message
         * send and avoid any exceptions that might be thrown from an attempt to send a remove
         * command to a failed transport.
         */
        void dispose();

        /**
         * @returns the next sequence number for a Message sent from this Producer.
         */
        long long getNextMessageSequence() {
            return this->messageSequence.getNextSequenceId();
        }

    private:

       // Checks for the closed state and throws if so.
       void checkClosed() const;

    };

}}}

#endif /* _ACTIVEMQ_CORE_KERNELS_ACTIVEMQPRODUCERKERNEL_H_ */