// Copyright 2016 Proyectos y Sistemas de Mantenimiento SL (eProsima).

//

// 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.

/**

 * @file SenderResource.hpp

 *

 */

#ifndef FASTDDS_RTPS_TRANSPORT__SENDERRESOURCE_HPP

#define FASTDDS_RTPS_TRANSPORT__SENDERRESOURCE_HPP

#include <fastdds/rtps/common/Types.hpp>

#include <functional>

#include <vector>

#include <list>

#include <chrono>

#include <fastdds/rtps/common/LocatorList.hpp>

#include <fastdds/rtps/common/LocatorsIterator.hpp>

#include <fastdds/rtps/transport/NetworkBuffer.hpp>

namespace eprosima {

namespace fastdds {

namespace rtps {

class RTPSParticipantImpl;

class MessageReceiver;

/**

 * RAII object that encapsulates the Send operation over one chanel in an unknown transport.

 * A Sender resource is always univocally associated to a transport channel; the

 * act of constructing a Sender Resource opens the channel and its destruction

 * closes it.

 * @ingroup NETWORK_MODULE

 */

class SenderResource

{

public:

    using NetworkBuffer = eprosima::fastdds::rtps::NetworkBuffer;

    /**

     * Sends to a destination locator, through the channel managed by this resource.

     * @param buffers Vector of buffers to send.

     * @param total_bytes Length of all buffers to be sent. Will be used as a boundary for

     * the previous parameter.

     * @param destination_locators_begin destination endpoint Locators iterator begin.

     * @param destination_locators_end destination endpoint Locators iterator end.

     * @param max_blocking_time_point If transport supports it then it will use it as maximum blocking time.

     * @return Success of the send operation.

     */

    bool send(

            const std::vector<NetworkBuffer>& buffers,

            const uint32_t& total_bytes,

            LocatorsIterator* destination_locators_begin,

            LocatorsIterator* destination_locators_end,

            const std::chrono::steady_clock::time_point& max_blocking_time_point)

    {

        return send_buffers_lambda_(buffers, total_bytes, destination_locators_begin, destination_locators_end,

                       max_blocking_time_point);

    }

    /**

     * Resources can only be transfered through move semantics. Copy, assignment, and

     * construction outside of the factory are forbidden.

     */

    SenderResource(

            SenderResource&& rValueResource)

    {

        clean_up.swap(rValueResource.clean_up);

        send_buffers_lambda_.swap(rValueResource.send_buffers_lambda_);

    }

    virtual ~SenderResource() = default;

    int32_t kind() const

    {

        return transport_kind_;

    }

    /**

     * Add locators representing the local endpoints managed by this sender resource.

     *

     * @param [in,out] locators  List where locators will be added.

     */

    virtual void add_locators_to_list(

            LocatorList_t& locators) const

    {

        (void)locators;

    }

protected:

    SenderResource(

            int32_t transport_kind)

        : transport_kind_(transport_kind)

    {

    }

    int32_t transport_kind_;

    std::function<void()> clean_up;

    std::function<bool(

                const std::vector<NetworkBuffer>&,

                uint32_t,

                LocatorsIterator* destination_locators_begin,

                LocatorsIterator* destination_locators_end,

                const std::chrono::steady_clock::time_point&)> send_buffers_lambda_;

private:

    SenderResource()                                 = delete;

    SenderResource(

            const SenderResource&)            = delete;

    SenderResource& operator =(

            const SenderResource&) = delete;

};

} // namespace rtps

} // namespace fastdds

} // namespace eprosima

#endif // FASTDDS_RTPS_TRANSPORT__SENDERRESOURCE_HPP