// SPDX-License-Identifier: MIT
// Copyright (c) 2024, Advanced Micro Devices, Inc. All rights reserved.

#include <iostream>
#include <vector>
#include <unordered_map>

#include "profiler/data_type_enum.hpp"
#include "profiler/profile_max_pool2d_bwd_impl.hpp"
#include "ck/tensor_operation/gpu/device/tensor_layout.hpp"
#include "profiler_operation_registry.hpp"

using ck::index_t;

struct maxPoolbwdArgParser
{
    std::unordered_map<std::string, std::vector<int>> long_opts = {{"length", {}},
                                                                   {"wsize", {}},
                                                                   {"wstride", {}},
                                                                   {"wdilation", {}},
                                                                   {"pad1", {}},
                                                                   {"pad2", {}}};

    bool parse_opt(int argc, char* argv[], const std::string& key, int i)
    {
        if(std::string("--") + key == argv[i])
        {
            int pos = i;
            while(++i < argc && argv[i][0] != '-') {}
            int end = i;
            for(int j = pos + 1; j < end; j++)
            {
                long_opts[key].push_back(std::stoi(argv[j]));
            }
            return true;
        }
        return false;
    }

    void operator()(int argc, char* argv[])
    {
        for(auto& kv : long_opts)
        {
            for(int i = 1; i < argc; i++)
            {
                if(parse_opt(argc, argv, kv.first, i))
                    break;
            }
        }
    }
};

void print_help_max_pool2d_bwd()
{
    std::cout << "arg1: data type (0: fp16; 1: fp32; 3: int8; 5: bf16)\n"
              << "arg2: verification (0: no; 1: yes)\n"
              << "arg3: initialization (0: no init; 1: integer value; 2: decimal value)\n"
              << "arg4: print tensor value (0: no; 1: yes)\n"
              << "arg5: time kernel (0=no, 1=yes)\n"
              << "--length: input tensor length for NCHW(e.g, --length 2 32 30 30) \n"
              << "--wsize: window size for YX (e.g, --wsize 2 2) \n"
              << "--wstride: window stride for HW (e.g, --wstride 2 2) \n"
              << "--wdilation: window dilation for HW (e.g, --wdilation 1 1) \n"
              << "--pad1: left side of padding in HW (e.g, --pad1 1 1) \n"
              << "--pad2: right side of padding in HW (e.g, --pad2 1 1) \n"
              << "eg: ckProfiler max_pool2d_bwd 0 1 2 0 --length 2 32 30 30 --wsize 2 2 "
                 "--wstride 2 2 --wdilation 1 1 --pad1 1 1 --pad2 1 1"
              << std::endl;
}

int profile_max_pool2d_bwd(int argc, char* argv[])
{
    ck::DataTypeEnum data_type = ck::DataTypeEnum::Half;
    bool do_verification       = true;
    int init_method            = 2;
    bool do_log                = false;
    bool time_kernel           = true;

    std::vector<index_t> in_length = {2, 32, 30, 30};
    std::vector<index_t> wsize     = {2, 2};
    std::vector<index_t> wstride   = {2, 2};
    std::vector<index_t> wdilation = {1, 1};
    std::vector<index_t> pad1      = {1, 1};
    std::vector<index_t> pad2      = {1, 1};

    if(argc != 2 && argc != 33)
    {
        print_help_max_pool2d_bwd();
        return 0;
    }
    else if(argc == 33)
    {
        data_type       = static_cast<ck::DataTypeEnum>(std::stoi(argv[2]));
        do_verification = std::stoi(argv[3]);
        init_method     = std::stoi(argv[4]);
        do_log          = std::stoi(argv[5]);
        time_kernel     = std::stoi(argv[6]);

        // parse the long options
        maxPoolbwdArgParser arg_parser;
        arg_parser(argc, argv);
        in_length = arg_parser.long_opts["length"];
        wsize     = arg_parser.long_opts["wsize"];
        wstride   = arg_parser.long_opts["wstride"];
        wdilation = arg_parser.long_opts["wdilation"];
        pad1      = arg_parser.long_opts["pad1"];
        pad2      = arg_parser.long_opts["pad2"];
    }

    using F16  = ck::half_t;
    using BF16 = ck::bhalf_t;
    using F32  = float;
    using I8   = int8_t;
    using I32  = int32_t;

    if(data_type == ck::DataTypeEnum::Half)
    {
        ck::profiler::profile_max_pool2d_bwd_impl<F16, F16, I32, F16, F16, false>(do_verification,
                                                                                  init_method,
                                                                                  do_log,
                                                                                  time_kernel,
                                                                                  in_length,
                                                                                  wsize,
                                                                                  wstride,
                                                                                  wdilation,
                                                                                  pad1,
                                                                                  pad2);
    }
    else if(data_type == ck::DataTypeEnum::BFloat16)
    {
        ck::profiler::profile_max_pool2d_bwd_impl<BF16, BF16, I32, BF16, BF16, false>(
            do_verification,
            init_method,
            do_log,
            time_kernel,
            in_length,
            wsize,
            wstride,
            wdilation,
            pad1,
            pad2);
    }
    else if(data_type == ck::DataTypeEnum::Float)
    {
        ck::profiler::profile_max_pool2d_bwd_impl<F32, F32, I32, F32, F32, false>(do_verification,
                                                                                  init_method,
                                                                                  do_log,
                                                                                  time_kernel,
                                                                                  in_length,
                                                                                  wsize,
                                                                                  wstride,
                                                                                  wdilation,
                                                                                  pad1,
                                                                                  pad2);
    }
    else if(data_type == ck::DataTypeEnum::Int8)
    {
        ck::profiler::profile_max_pool2d_bwd_impl<I8, I8, I32, I8, I8, false>(do_verification,
                                                                              init_method,
                                                                              do_log,
                                                                              time_kernel,
                                                                              in_length,
                                                                              wsize,
                                                                              wstride,
                                                                              wdilation,
                                                                              pad1,
                                                                              pad2);
    }
    else
    {

        throw std::runtime_error("not implemented yet");
    }

    return 0;
}

REGISTER_PROFILER_OPERATION("max_pool2d_bwd", "max_pool2d bwd", profile_max_pool2d_bwd);
