// 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 SampleIdentity.hpp

 */

#ifndef FASTDDS_RTPS_COMMON__SAMPLEIDENTITY_HPP

#define FASTDDS_RTPS_COMMON__SAMPLEIDENTITY_HPP

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

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

namespace eprosima {

namespace fastdds {

namespace rtps {

/*!

 * @brief This class is used to specify a sample

 * @ingroup COMMON_MODULE

 */

class FASTDDS_EXPORTED_API SampleIdentity

{

public:

    /*!

     * @brief

     */

    bool operator ==(

            const SampleIdentity& sample_id) const

    {

        return (writer_guid_ == sample_id.writer_guid_) && (sequence_number_ == sample_id.sequence_number_);

    }

    /*!

     * @brief

     */

    bool operator !=(

            const SampleIdentity& sample_id) const

    {

        return !(*this == sample_id);

    }

    /**

     * @brief To allow using SampleIdentity as map key.

     * @param sample

     * @return

     */

    bool operator <(

            const SampleIdentity& sample) const

    {

        return writer_guid_ < sample.writer_guid_

               || (writer_guid_ == sample.writer_guid_

               && sequence_number_ < sample.sequence_number_);

    }

    SampleIdentity& writer_guid(

            const GUID_t& guid)

    {

        writer_guid_ = guid;

        return *this;

    }

    SampleIdentity& writer_guid(

            GUID_t&& guid)

    {

        writer_guid_ = std::move(guid);

        return *this;

    }

    const GUID_t& writer_guid() const

    {

        return writer_guid_;

    }

    GUID_t& writer_guid()

    {

        return writer_guid_;

    }

    SampleIdentity& sequence_number(

            const SequenceNumber_t& seq)

    {

        sequence_number_ = seq;

        return *this;

    }

    SampleIdentity& sequence_number(

            SequenceNumber_t&& seq)

    {

        sequence_number_ = std::move(seq);

        return *this;

    }

    const SequenceNumber_t& sequence_number() const

    {

        return sequence_number_;

    }

    SequenceNumber_t& sequence_number()

    {

        return sequence_number_;

    }

    static SampleIdentity unknown()

    {

        return SampleIdentity();

    }

private:

    GUID_t writer_guid_ = GUID_t::unknown();

    SequenceNumber_t sequence_number_ = SequenceNumber_t::unknown();

    friend std::istream& operator >>(

            std::istream& input,

            SampleIdentity& sid);

    friend std::ostream& operator <<(

            std::ostream& output,

            const SampleIdentity& sid);

};

#ifndef DOXYGEN_SHOULD_SKIP_THIS_PUBLIC

/**

 * Stream operator, retrieves a GUID.

 * @param input Input stream.

 * @param sid SampleIdentity to read.

 * @return Stream operator.

 */

inline std::istream& operator >>(

        std::istream& input,

        SampleIdentity& sid)

{

    std::istream::sentry s(input);

    if (s)

    {

        std::ios_base::iostate excp_mask = input.exceptions();

        try

        {

            input.exceptions(excp_mask | std::ios_base::failbit | std::ios_base::badbit);

            char sep;

            input >> sid.writer_guid_ >> sep >> sid.sequence_number_;

            if (sep != '|')

            {

                input.setstate(std::ios_base::failbit);

            }

        }

        catch (std::ios_base::failure&)

        {

            // maybe is unknown or just invalid

            sid.writer_guid_ = GUID_t::unknown();

            sid.sequence_number_ = SequenceNumber_t::unknown();

        }

        input.exceptions(excp_mask);

    }

    return input;

}

/**

 * Stream operator, prints a GUID.

 * @param output Output stream.

 * @param sid SampleIdentity to print.

 * @return Stream operator.

 */

inline std::ostream& operator <<(

        std::ostream& output,

        const SampleIdentity& sid)

{

    output << sid.writer_guid_ << '|' << sid.sequence_number_;

    return output;

}

#endif // DOXYGEN_SHOULD_SKIP_THIS_PUBLIC

} //namespace rtps

} //namespace fastdds

} //namespace eprosima

#endif // FASTDDS_RTPS_COMMON__SAMPLEIDENTITY_HPP