#pragma once

/*

ABSTRACT DEVICE COMPONENTS LIBRARY

*/

#include <concepts>

#include "../common/adc_traits.h"

/*  DEFINITIONS OF NETWORK COMPONENTS INTERFACES  */


namespace adc::interfaces
{


template <traits::adc_time_duration_c... Ts>
struct adc_duration_common_type;


template <traits::adc_time_duration_c T1, traits::adc_time_duration_c T2>
struct adc_duration_common_type<T1, T2> : std::common_type<T1, T2> {
};


template <traits::adc_time_duration_c T1, traits::adc_time_duration_c T2, traits::adc_time_duration_c... Ts>
struct adc_duration_common_type<T1, T2, Ts...> : adc_duration_common_type<std::common_type_t<T1, T2>, Ts...> {
};


template <traits::adc_time_duration_c... Ts>
using adc_duration_common_type_t = typename adc_duration_common_type<Ts...>::type;


/*  all STL helper duration types  */
using adc_common_duration_t = adc_duration_common_type_t<std::chrono::nanoseconds,
                                                         std::chrono::microseconds,
                                                         std::chrono::milliseconds,
                                                         std::chrono::seconds,
                                                         std::chrono::minutes,
                                                         std::chrono::hours,
                                                         std::chrono::days,
                                                         std::chrono::weeks,
                                                         std::chrono::months,
                                                         std::chrono::years>;

/*
    struct NetService {
        typedef ImplementationDependentT netservice_ident_t;
        typedef ImplementationDependentT async_ctx_t;
        typedef ImplementationDependentT endpoint_t;

        template<typename Rep, typename Period>
        auto asyncAccept(const endpoint_t&, async_ctx_t&, const std::chrono::duration<Rep, Period>&)

        template<typename Rep, typename Period>
        auto asyncConnect(const endpoint_t&, async_ctx_t&, const std::chrono::duration<Rep, Period>&)

        template<typename Rep, typename Period, adc::traits::adc_input_char_range R>
        auto asyncSend(const R&, async_ctx_t&, const std::chrono::duration<Rep, Period>&)

        template<typename Rep, typename Period>
        auto asyncReceived(async_ctx_t&, const std::chrono::duration<Rep, Period>&)

        template<typename Rep, typename Period>
        auto accept(const endpoint_t&, const std::chrono::duration<Rep, Period>&)

        template<typename Rep, typename Period>
        auto connect(const endpoint_t&, const std::chrono::duration<Rep, Period>&)

        template<typename Rep, typename Period, adc::traits::adc_input_char_range R>
        auto send(const R&, const std::chrono::duration<Rep, Period>&)

        template<adc::traits::adc_output_char_range R, typename Rep, typename Period>
        R received(const std::chrono::duration<Rep, Period>&)

    }
*/
template <typename SRVT,
          typename SMSGT = std::string_view,     // sending message type
          typename RMSGT = std::string,          // receiving message type
          typename DURT = adc_common_duration_t  // time duration type
          >
concept adc_netservice_c =
    traits::adc_input_char_range<SMSGT> && traits::adc_output_char_range<RMSGT> && traits::adc_time_duration_c<DURT> &&
    requires(SRVT srv, const SRVT srv_const) {
        typename SRVT::netservice_ident_t;

        // netservice_ident_t ident() const
        { srv_const.ident() } -> std::same_as<typename SRVT::netservice_ident_t>;

        typename SRVT::async_ctx_t;
        typename SRVT::endpoint_t;

        // asynchronous (non-blocking) operations
        srv.asyncAccept(std::declval<const typename SRVT::endpoint_t&>(), std::declval<typename SRVT::async_ctx_t&>(),
                        std::declval<const DURT&>());

        srv.asyncConnect(std::declval<const typename SRVT::endpoint_t&>(), std::declval<typename SRVT::async_ctx_t&>(),
                         std::declval<const DURT&>());

        srv.asyncSend(std::declval<const SMSGT&>(), std::declval<typename SRVT::async_ctx_t&>(),
                      std::declval<const DURT&>());

        srv.asyncReceive(std::declval<typename SRVT::async_ctx_t&>(), std::declval<const DURT&>());

        // synchronous (blocking) operations
        srv.accept(std::declval<const typename SRVT::endpoint_t&>(), std::declval<const DURT&>());

        srv.connect(std::declval<const typename SRVT::endpoint_t&>(), std::declval<const DURT&>());

        srv.send(std::declval<const SMSGT&>(), std::declval<const DURT&>());

        { srv.receive(std::declval<const DURT&>()) } -> std::same_as<RMSGT>;

        srv.close();
    };


/*  NETWORK SESSION  */

template <typename SESST>
concept adc_netsession_c =
    std::derived_from<SESST, std::enable_shared_from_this<SESST>> && requires(SESST sess, const SESST sess_const) {
        typename SESST::netsession_ident_t;

        // netsession_ident_t ident() const
        { sess_const.ident() } -> std::same_as<typename SESST::netsession_ident_t>;

        sess.start();
        sess.stop();
    };



/*  NETWORK SESSION-LEVEL PROTOCOL  */

template <typename SESS_PROTOT, typename BUFFT = std::string_view>
concept adc_netsession_proto_c =
    traits::adc_input_char_range<BUFFT> && requires(SESS_PROTOT proto, const SESS_PROTOT proto_const) {
        typename SESS_PROTOT::proto_ident_t;

        // proto_ident_t ident() const (const method)
        { proto_const.ident() } -> std::same_as<typename SESS_PROTOT::proto_ident_t>;

        // typename SESS_PROTOT::search_result_t;

        // search for the first occurence of valid protocol sequence in input user byte sequence
        // the method must return std::tuple<begin, end, flag>:
        //     start - input range iterator of the sequence first byte
        //     stop  - input range iterator of the sequence end ("after-the-last" byte!!!)
        //     flag  - true if valid sequence was found, false - otherwise
        {
            proto.search(std::declval<const BUFFT&>())
        } -> std::same_as<std::tuple<std::ranges::iterator_t<BUFFT>, std::ranges::iterator_t<BUFFT>, bool>>;


        // construct netsession protocol representation of input user byte sequence
        // the method must return a range of char range views or output char range
        { proto.toProto(std::declval<const BUFFT&>()) } -> traits::adc_range_of_view_or_output_char_range;

        // return user byte sequence from input netsession protocol representation
        // the method must return a view of char range or output char range
        { proto.fromProto(std::declval<const BUFFT&>()) } -> traits::adc_view_or_output_char_range;
    };


}  // namespace adc::interfaces