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#pragma once

#include <atomic>
#include <iostream>
#include <set>
#include <vector>

#include <Tensile/Debug.hpp>
#include <Tensile/PredicateDebugger.hpp>
#include <Tensile/UtilsOrigami.hpp>

#include <tensilelitehost/export.h>

namespace TensileLite
{

    /**
     * \ingroup SolutionLibrary
     *
     * Uses a distance function to select solutions based on benchmarks.
     * Benchmarks are performed to determine the optimal solution at a number of
     * specific sizes. At runtime, we find the benchmarked size that is closest
     * to the size asked for.
     */
    template <typename MyProblem, typename MySolution = typename MyProblem::Solution>
    struct ProblemPredictionLibrary : public SolutionLibrary<MyProblem, MySolution>
    {
        std::vector<std::pair<int, std::shared_ptr<MySolution>>> solution_list;
        std::vector<origami::config_t>                           origami_config_list;

        mutable std::atomic<bool> lastFindTopRetAll = false;

        static std::string Type()
        {
            return "Prediction";
        }
        virtual std::string type() const override
        {
            return Type();
        }
        virtual std::string description() const override
        {
            if(solution_list.empty())
                return concatenate(type(), ", solution_list: empty");
            return concatenate(type(), solution_list.size());
        }

        virtual std::shared_ptr<MySolution> getSolutionByIndex(MyProblem const& problem,
                                                               Hardware const&  hardware,
                                                               const int index) const override
        {
            auto indexMatch =
                std::find_if(solution_list.begin(), solution_list.end(),
                             [&index](auto& s){ return s.first == index; });
            if(indexMatch != solution_list.end())
                return indexMatch->second;
            return nullptr;
        }

        virtual std::shared_ptr<MySolution> findBestSolution(MyProblem const& problem,
                                                             Hardware const&  hardware,
                                                             double*          fitness
                                                             = nullptr) const override
        {
            auto                        topSolutions = findTopSolutions(problem, hardware, 1);
            std::shared_ptr<MySolution> solution;
            if(!topSolutions.empty())
            {
                solution = topSolutions[0];
            }
            return solution;
        }

        virtual SolutionSet<MySolution>
            findAllSolutions(MyProblem const&          problem,
                             Hardware const&           hardware,
                             SolutionLibrarySearchType searchType
                             = SolutionLibrarySearchType::DEFAULT) const override
        {
            bool                    debug = Debug::Instance().printPropertyEvaluation();
            SolutionSet<MySolution> rv;
            if(searchType == SolutionLibrarySearchType::DEFAULT)
                return rv;

            for(auto const& row : this->solution_list)
            {
                if(debug)
                    std::cout << row.second->description() << std::endl;
                rv.insert(row.second);
            }

            return rv;
        }

        virtual SolutionSet<MySolution>
            findAllSolutionsGroupedGemm(std::vector<MyProblem> const& problems,
                                        Hardware const&               hardware,
                                        SolutionLibrarySearchType     searchType
                                        = SolutionLibrarySearchType::DEFAULT) const override
        {
            bool                    debug = Debug::Instance().printPropertyEvaluation();
            SolutionSet<MySolution> rv;
            if(searchType == SolutionLibrarySearchType::DEFAULT)
                return rv;

            for(auto const& row : this->solution_list)
            {
                if(debug)
                    std::cout << row.second->description() << std::endl;
                rv.insert(row.second);
            }

            return rv;
        }

        virtual SolutionVector<MySolution> findTopSolutions(MyProblem const& problem,
                                                            Hardware const&  hardware,
                                                            int numSolutions) const override
        {
            SolutionVector<MySolution> rv;
            size_t                     m     = 1;
            size_t                     n     = 1;
            size_t                     k     = 1;
            size_t                     batch = 1;
            for(size_t i = 0; i < problem.freeIndicesA().size(); i++)
            {
                m *= problem.freeSizeA(i);
            }
            for(size_t i = 0; i < problem.freeIndicesB().size(); i++)
            {
                n *= problem.freeSizeB(i);
            }
            for(size_t i = 0; i < problem.boundIndices().size(); ++i)
            {
                k *= problem.boundSize(i);
            }
            for(size_t i = 0; i < problem.batchIndices().size(); ++i)
            {
                batch *= problem.batchSize(i);
            }

            hip::HipAMDGPU const* pAMDGPU = dynamic_cast<hip::HipAMDGPU const*>(&hardware);

            const bool debug = Debug::Instance().printPropertyEvaluation();

            auto considerSolution = [&](std::shared_ptr<MySolution> const& solution) {
                const bool hwMatch   = (*(solution->hardwarePredicate))(hardware);
                const bool probMatch = (*(solution->problemPredicate))(problem);
                const bool predicateMatch = hwMatch && probMatch;

                if(debug)
                {
                    PredicateDebugger::printHeader(
                        std::cout, "Prediction: " + solution->name());
                    solution->hardwarePredicate->debugEval(hardware, std::cout);
                    solution->problemPredicate->debugEval(problem, std::cout);
                    PredicateDebugger::printFooter(std::cout, predicateMatch);
                }

                if(predicateMatch)
                {
                    rv.emplace_back(solution);
                }
            };

            if(pAMDGPU && pAMDGPU->analyticalHardware)
            {
                auto miDataType = datatypeToAnalyticalDatatype(problem.computeInputTypeA());

                if(problem.f32XdlMathOp() == rocisa::DataType::XFloat32) // Check F32 compute type
                    miDataType = origami::data_type_t::XFloat32;
                origami::problem_t origami_problem = {
                    .size        = {m, n, k},
                    .batch       = batch,
                    // CU budget hint; 0 = use all CUs.
                    .num_cus     = static_cast<size_t>(problem.getParams().smCountTarget()),
                    .a_transpose = problem.transA() ? origami::transpose_t::T : origami::transpose_t::N,
                    .b_transpose = problem.transB() ? origami::transpose_t::T : origami::transpose_t::N,
                    .a_dtype     = datatypeToAnalyticalDatatype(problem.a().dataType()),
                    .b_dtype     = datatypeToAnalyticalDatatype(problem.b().dataType()),
                    .c_dtype     = datatypeToAnalyticalDatatype(problem.c().dataType()),
                    .d_dtype     = datatypeToAnalyticalDatatype(problem.d().dataType()),
                    .mi_dtype    = miDataType,
                    .a_mx_block_size = 0, // MX Data types come from rocroller
                    .b_mx_block_size = 0, // MX Data types come from rocroller
                };

                auto prediction_result = origami::rank_configs(
                    origami_problem, *(pAMDGPU->analyticalHardware), origami_config_list);

                for(const auto& r : prediction_result)
                {
                    if(r.config.index >= solution_list.size())
                    {
                        continue;
                    }
                    considerSolution(solution_list[r.config.index].second);
                    if(rv.size() == numSolutions)
                    {
                        break;
                    }
                }
            }
            // can't reach the requested number, means findTop already done its best
            lastFindTopRetAll = (rv.size() < numSolutions);
            return rv;
        }

        virtual bool lastFindTopAlreadyRetAll() const override
        {
            return lastFindTopRetAll;
        }

        virtual SolutionVector<MySolution>
            findTopSolutionsGroupedGemm(std::vector<MyProblem> const& problems,
                                        Hardware const&               hardware,
                                        int                           numSolutions) const override
        {
            SolutionVector<MySolution> solutions;
            return solutions;
        }
    };
} // namespace TensileLite