// SPDX-License-Identifier: MIT
// Copyright (c) 2018-2022, Advanced Micro Devices, Inc. All rights reserved.

#pragma once

#include <algorithm>
#include <iostream>
#include <iterator>

#include "ck/ck.hpp"
#include "ck/tensor_operation/gpu/device/convolution_backward_weight_specialization.hpp"
#include "ck/tensor_operation/gpu/device/tensor_layout.hpp"
#include "ck/tensor_operation/gpu/element/element_wise_operation.hpp"

#include "ck/library/utility/check_err.hpp"
#include "ck/library/utility/device_memory.hpp"
#include "ck/library/utility/host_tensor.hpp"
#include "ck/library/utility/host_tensor_generator.hpp"
#include "ck/library/utility/convolution_parameter.hpp"
#include "ck/library/utility/convolution_host_tensor_descriptor_helper.hpp"
#include "ck/library/reference_tensor_operation/cpu/reference_conv_bwd_weight.hpp"

using BF16 = ck::bhalf_t;
using F16  = ck::half_t;
using F32  = float;

template <ck::index_t... Is>
using S = ck::Sequence<Is...>;

using PassThrough = ck::tensor_operation::element_wise::PassThrough;

static constexpr auto ConvBwdWeightDefault =
    ck::tensor_operation::device::ConvolutionBackwardWeightSpecialization::Default;

template <typename InputLay, typename WeightLay, typename OutputLay>
struct CommonLayoutSetting
{
    using InputLayout  = InputLay;
    using WeightLayout = WeightLay;
    using OutputLayout = OutputLay;
};

template <ck::index_t NDimSpatial>
struct CommonLayoutSettingSelector;

namespace ctl = ck::tensor_layout::convolution;

template <>
struct CommonLayoutSettingSelector<1> final : CommonLayoutSetting<ctl::GNWC, ctl::GKXC, ctl::GNWK>
{
};

template <>
struct CommonLayoutSettingSelector<2> final
    : CommonLayoutSetting<ctl::GNHWC, ctl::GKYXC, ctl::GNHWK>
{
};

template <>
struct CommonLayoutSettingSelector<3> final
    : CommonLayoutSetting<ctl::GNDHWC, ctl::GKZYXC, ctl::GNDHWK>
{
};

template <ck::index_t NDimSpatial>
using InputLayout = typename CommonLayoutSettingSelector<NDimSpatial>::InputLayout;

template <ck::index_t NDimSpatial>
using WeightLayout = typename CommonLayoutSettingSelector<NDimSpatial>::WeightLayout;

template <ck::index_t NDimSpatial>
using OutputLayout = typename CommonLayoutSettingSelector<NDimSpatial>::OutputLayout;

struct ExecutionConfig final
{
    bool do_verification = true;
    int init_method      = 1;
    bool time_kernel     = false;
};

#define DefaultConvParam                                                      \
    ck::utils::conv::ConvParam                                                \
    {                                                                         \
        2, 4, 1, 128, 256, {3, 3}, {14, 14}, {1, 1}, {1, 1}, {1, 1}, { 1, 1 } \
    }

inline void print_help_msg()
{
    std::cerr << "arg1: verification (0=no, 1=yes)\n"
              << "arg2: initialization (0=no init, 1=integer value, 2=decimal value)\n"
              << "arg3: time kernel (0=no, 1=yes)\n"
              << ck::utils::conv::get_conv_param_parser_helper_msg() << std::endl;
}

inline bool parse_cmd_args(int argc,
                           char* argv[],
                           ExecutionConfig& config,
                           ck::utils::conv::ConvParam& conv_param)
{
    constexpr int num_execution_config_args =
        3; // arguments for do_verification, init_method, time_kernel
    constexpr int num_conv_param_leading_args = 5; // arguments for num_dim_spatial_, G_, N_, K_, C_

    constexpr int threshold_to_catch_partial_args = 1 + num_execution_config_args;
    constexpr int threshold_to_catch_all_args =
        threshold_to_catch_partial_args + num_conv_param_leading_args;

    if(argc == 1)
    {
        // use default
    }
    // catch only ExecutionConfig arguments
    else if(argc == threshold_to_catch_partial_args)
    {
        config.do_verification = std::stoi(argv[1]);
        config.init_method     = std::stoi(argv[2]);
        config.time_kernel     = std::stoi(argv[3]);
    }
    // catch both ExecutionConfig & ConvParam arguments
    else if(threshold_to_catch_all_args < argc && ((argc - threshold_to_catch_all_args) % 3 == 0))
    {
        config.do_verification = std::stoi(argv[1]);
        config.init_method     = std::stoi(argv[2]);
        config.time_kernel     = std::stoi(argv[3]);

        const ck::index_t num_dim_spatial = std::stoi(argv[4]);
        conv_param                        = ck::utils::conv::parse_conv_param(
            num_dim_spatial, threshold_to_catch_partial_args, argv);
    }
    else
    {
        print_help_msg();
        return false;
    }

    return true;
}
