// SPDX-License-Identifier: MIT
// Copyright (c) 2025, Advanced Micro Devices, Inc. All rights reserved.

#pragma once

#include <string>

#include "ck_tile/core.hpp"
#include "ck_tile/host/kernel_launch.hpp"
#include "ck_tile/ops/epilogue.hpp"
#include "ck_tile/ops/flatmm.hpp"
#include "ck_tile/ops/gemm.hpp"

// GEMM config with 32x132 warp tile
template <typename DataType>
struct FlatmmConfig32
{
    static constexpr ck_tile::index_t M_Tile = 128;
    static constexpr ck_tile::index_t N_Tile = 128;
    static constexpr ck_tile::index_t K_Tile = 128 / sizeof(DataType);

    static constexpr ck_tile::index_t M_Warp = 1;
    static constexpr ck_tile::index_t N_Warp = 4;
    static constexpr ck_tile::index_t K_Warp = 1;

    static constexpr ck_tile::index_t M_Warp_Tile = 32;
    static constexpr ck_tile::index_t N_Warp_Tile = 32;
    static constexpr ck_tile::index_t K_Warp_Tile = sizeof(DataType) == 2 ? 16 : 32;

    static constexpr bool kPadM = false;
    static constexpr bool kPadN = false;
    static constexpr bool kPadK = false;

    static constexpr bool TransposeC            = false;
    static constexpr bool UseStructuredSparsity = false;

    static constexpr int kBlockPerCu                = 2;
    static constexpr int TileParitionerGroupNum     = 8;
    static constexpr int TileParitionerM01          = 4;
    static constexpr auto Scheduler                 = ck_tile::GemmPipelineScheduler::Default;
    static constexpr ck_tile::index_t NumWaveGroups = 1;
    static constexpr bool DoubleSmemBuffer          = false;
};

template <typename DataType>
struct FlatmmConfig32_950 : public FlatmmConfig32<DataType>
{
    static constexpr ck_tile::index_t K_Warp_Tile = sizeof(DataType) == 2 ? 16 : 64;
};

// GEMM config with 16x16 warp tile
template <typename DataType>
struct FlatmmConfig16
{
    static constexpr ck_tile::index_t M_Tile = 128;
    static constexpr ck_tile::index_t N_Tile = 128;
    static constexpr ck_tile::index_t K_Tile = 128 / sizeof(DataType);

    static constexpr ck_tile::index_t M_Warp = 1;
    static constexpr ck_tile::index_t N_Warp = 4;
    static constexpr ck_tile::index_t K_Warp = 1;

    static constexpr ck_tile::index_t M_Warp_Tile = 16;
    static constexpr ck_tile::index_t N_Warp_Tile = 16;
    static constexpr ck_tile::index_t K_Warp_Tile = sizeof(DataType) == 2 ? 32 : 64;

    static constexpr bool kPadM = false;
    static constexpr bool kPadN = false;
    static constexpr bool kPadK = false;

    static constexpr bool TransposeC            = false;
    static constexpr bool UseStructuredSparsity = false;

    static constexpr int kBlockPerCu                = 2;
    static constexpr int TileParitionerGroupNum     = 8;
    static constexpr int TileParitionerM01          = 4;
    static constexpr auto Scheduler                 = ck_tile::GemmPipelineScheduler::Default;
    static constexpr ck_tile::index_t NumWaveGroups = 1;
    static constexpr bool DoubleSmemBuffer          = false;
};

template <typename DataType>
struct FlatmmConfig16_950 : public FlatmmConfig16<DataType>
{
    static constexpr ck_tile::index_t K_Warp_Tile = sizeof(DataType) == 2 ? 32 : 128;
};

template <typename ADataType>
struct GemmBasicTypeConfig;

template <>
struct GemmBasicTypeConfig<ck_tile::half_t>
{
    using ADataType   = ck_tile::half_t;
    using BDataType   = ck_tile::half_t;
    using AccDataType = float;
    using CDataType   = ck_tile::half_t;
    // ToDo: Add more bias config to support different categories of GEMM.
};

template <>
struct GemmBasicTypeConfig<ck_tile::bf16_t>
{
    using ADataType   = ck_tile::bf16_t;
    using BDataType   = ck_tile::bf16_t;
    using AccDataType = float;
    using CDataType   = ck_tile::bf16_t;
};
template <>
struct GemmBasicTypeConfig<ck_tile::fp8_t>
{
    using ADataType   = ck_tile::fp8_t;
    using BDataType   = ck_tile::fp8_t;
    using AccDataType = float;
    using CDataType   = ck_tile::half_t;
    // ToDo: Add more bias config to support different categories of GEMM.
};

template <>
struct GemmBasicTypeConfig<ck_tile::bf8_t>
{
    using ADataType   = ck_tile::bf8_t;
    using BDataType   = ck_tile::bf8_t;
    using AccDataType = float;
    using CDataType   = ck_tile::half_t;
};

template <typename T>
struct DataTypeTraits;

template <>
struct DataTypeTraits<ck_tile::fp8_t>
{
    static constexpr const char* name = "fp8";
};

template <>
struct DataTypeTraits<ck_tile::bf8_t>
{
    static constexpr const char* name = "bf8";
};
template <>
struct DataTypeTraits<float>
{
    static constexpr const char* name = "fp32";
};

template <>
struct DataTypeTraits<double>
{
    static constexpr const char* name = "fp64";
};

template <>
struct DataTypeTraits<ck_tile::half_t>
{
    static constexpr const char* name = "fp16";
};

template <typename T>
struct is_8bit_type
    : std::bool_constant<std::is_same_v<T, ck_tile::fp8_t> || std::is_same_v<T, ck_tile::bf8_t>>
{
};

auto create_args(int argc, char* argv[])
{
    ck_tile::ArgParser arg_parser;
    arg_parser.insert("m", "256", "m dimension")
        .insert("n", "256", "n dimension")
        .insert("k", "128", "k dimension")
        .insert("a_layout", "R", "A tensor data layout - Row by default")
        .insert("b_layout", "C", "B tensor data layout - Row by default")
        .insert("c_layout", "R", "C tensor data layout - Row by default")
        .insert("stride_a", "0", "Tensor A stride")
        .insert("stride_b", "0", "Tensor B stride")
        .insert("stride_c", "0", "Tensor C stride")
        .insert("v", "1", "0. No validation, 1. Validation on CPU, 2. Validation on GPU")
        .insert("prec", "fp16", "data type. fp16/bf16/fp8/bf8")
        .insert("warmup", "50", "number of iterations before benchmark the kernel")
        .insert("repeat", "100", "number of iterations to benchmark the kernel")
        .insert("timer", "gpu", "gpu:gpu timer, cpu:cpu timer")
        .insert("split_k", "1", "splitK value")
        .insert("init", "0", "0:random, 1:linear, 2:constant(1)")
        .insert(
            "warp_tile", "0", "0: 16x16, 1: 32x32, 2: 16x16x128 (950 only), 3: 32x32x64 (950 only)")
        .insert("json", "0", "0: No Json, 1: Dump Results in Json format")
        .insert("jsonfile", "flatmm_basic.json", "json file name to dump results");
    bool result = arg_parser.parse(argc, argv);
    return std::make_tuple(result, arg_parser);
}

// host API
template <typename ADataType,
          typename BDataType,
          typename AccDataType,
          typename CDataType,
          typename FlatmmConfig,
          typename ALayout,
          typename BLayout,
          typename CLayout>
float flatmm_calc(const ck_tile::FlatmmHostArgs<>& args, const ck_tile::stream_config& s);