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 *
 * MIT License
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 * Copyright (C) 2019-2022 Advanced Micro Devices, Inc. All rights reserved.
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 * of this software and associated documentation files (the "Software"), to deal
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#pragma once

#include <Tensile/SolutionLibrary.hpp>

#include <Tensile/CachingLibrary.hpp>
#include <Tensile/Debug.hpp>
#include <Tensile/ExactLogicLibrary.hpp>
#include <Tensile/MapLibrary.hpp>
#include <Tensile/MasterSolutionLibrary.hpp>
#include <Tensile/PlaceholderLibrary.hpp>
#include <Tensile/SingleSolutionLibrary.hpp>

#include <Tensile/Serialization/Base.hpp>
#include <Tensile/Serialization/Predicates.hpp>

#include <Tensile/Serialization/DecisionTreeLibrary.hpp>
#include <Tensile/Serialization/ExactLogicLibrary.hpp>
#include <Tensile/Serialization/GranularitySelectionLibrary.hpp>
#include <Tensile/Serialization/MapLibrary.hpp>
#include <Tensile/Serialization/MatchingLibrary.hpp>
#include <Tensile/Serialization/PlaceholderLibrary.hpp>

namespace Tensile
{
    namespace Serialization
    {
        template <typename IO>
        struct MappingTraits<std::shared_ptr<SolutionLibrary<ContractionProblem>>, IO>
            : public BaseClassMappingTraits<SolutionLibrary<ContractionProblem>, IO, false>
        {
        };

        template <typename MyProblem, typename MySolution, typename IO>
        struct SubclassMappingTraits<SolutionLibrary<MyProblem, MySolution>, IO>
            : public DefaultSubclassMappingTraits<
                  SubclassMappingTraits<SolutionLibrary<MyProblem, MySolution>, IO>,
                  SolutionLibrary<MyProblem, MySolution>,
                  IO>
        {
            using Self = SubclassMappingTraits<SolutionLibrary<MyProblem, MySolution>, IO>;
            using Base
                = DefaultSubclassMappingTraits<Self, SolutionLibrary<MyProblem, MySolution>, IO>;
            using SubclassMap = typename Base::SubclassMap;
            const static SubclassMap subclasses;

            static typename Base::SubclassMap GetSubclasses()
            {
                return typename Base::SubclassMap(
                    {Base::template Pair<SingleSolutionLibrary<MyProblem, MySolution>>(),
                     Base::template Pair<HardwareSelectionLibrary<MyProblem, MySolution>>(),
                     Base::template Pair<ProblemSelectionLibrary<MyProblem, MySolution>>(),
                     Base::template Pair<ProblemMapLibrary<MyProblem, MySolution>>(),
                     Base::template Pair<ProblemMatchingLibrary<MyProblem, MySolution>>(),
                     Base::template Pair<GranularitySelectionLibrary<MyProblem, MySolution>>(),
                     Base::template Pair<PlaceholderLibrary<MyProblem, MySolution>>(),
                     Base::template Pair<DecisionTreeLibrary<MyProblem, MySolution>>()});
            }
        };

        template <typename MyProblem, typename MySolution, typename IO>
        using dsmt = SubclassMappingTraits<SolutionLibrary<MyProblem, MySolution>, IO>;

        template <typename MyProblem, typename MySolution, typename IO>
        const typename dsmt<MyProblem, MySolution, IO>::SubclassMap
            dsmt<MyProblem, MySolution, IO>::subclasses
            = dsmt<MyProblem, MySolution, IO>::GetSubclasses();

        template <typename MyProblem, typename MySolution, typename IO>
        struct MappingTraits<SingleSolutionLibrary<MyProblem, MySolution>, IO>
        {
            using Library = SingleSolutionLibrary<MyProblem, MySolution>;
            using iot     = IOTraits<IO>;

            static void mapping(IO& io, Library& lib)
            {
                auto ctx = static_cast<LibraryIOContext<MySolution>*>(iot::getContext(io));
                if(ctx == nullptr || ctx->solutions == nullptr)
                {
                    iot::setError(io,
                                  "SingleSolutionLibrary requires that context be set to "
                                  "a SolutionMap.");
                }

                int index;

                if(iot::outputting(io))
                {
                    // Provides a mean of representing the single solution library
                    // within the logic file in a way that the serialization works by
                    // providing a default case -1 index represents a null pointer solution.
                    // This is used to make the variable optional which requires in code a
                    // default case. The alternative is to represent it as an integer in
                    // the logic and implement the effective transformation in code which side
                    // steps the serialization mechanizm and adds more complexity.
                    if(lib.solution == nullptr)
                    {
                        index = -1;
                    }
                    else
                    {
                        index = lib.solution->index;
                    }
                }

                iot::mapRequired(io, "index", index);

                if(index == -1)
                {
                    // -1 indicates that the field is missing
                    lib.solution = nullptr;
                    return;
                }

                if(!iot::outputting(io))
                {
                    auto iter = ctx->solutions->find(index);
                    if(iter == ctx->solutions->end())
                    {
                        std::ostringstream msg;
                        msg << "Invalid solution index: " << index;
                        iot::setError(io, msg.str());
                    }
                    else
                    {
                        lib.solution = iter->second;
                    }
                }
            }

            const static bool flow = true;
        };

        template <typename MyProblem, typename MySolution, typename IO>
        struct MappingTraits<MasterSolutionLibrary<MyProblem, MySolution>, IO, EmptyContext>
        {
            using Library = MasterSolutionLibrary<MyProblem, MySolution>;
            using iot     = IOTraits<IO>;

            static void mapping(IO& io, Library& lib)
            {
                iot::mapOptional(io, "version", lib.version);

                std::vector<std::shared_ptr<MySolution>> solutions;

                if(iot::outputting(io))
                {
                    solutions.reserve(lib.solutions.size());
                    for(auto const& pair : lib.solutions)
                        solutions.push_back(pair.second);
                }

                iot::mapRequired(io, "solutions", solutions);

                if(!iot::outputting(io))
                {
                    for(auto const& s : solutions)
                        lib.solutions[s->index] = s;

                    auto ctx = static_cast<LibraryIOContext<MySolution>*>(iot::getContext(io));
                    ctx->solutions      = &lib.solutions;
                    ctx->solutionsGuard = &lib.solutionsGuard;
                }

                std::shared_ptr<SolutionLibrary<MyProblem, MySolution>> innerLibrary;

                if(iot::outputting(io))
                {
                    auto cache = std::dynamic_pointer_cast<CachingLibrary<MyProblem, MySolution>>(
                        lib.library);
                    if(cache)
                    {
                        innerLibrary = cache->library();
                    }
                    else
                    {
                        innerLibrary = lib.library;
                    }
                }

                iot::mapRequired(io, "library", innerLibrary);

                if(!iot::outputting(io))
                {
                    auto cache
                        = std::make_shared<CachingLibrary<MyProblem, MySolution>>(innerLibrary);

                    lib.library = cache;
                }
            }

            const static bool flow = false;
        };
    } // namespace Serialization
} // namespace Tensile
