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#pragma once

#include "cutlass/arch/arch.h"
#include "cutlass/gemm/gemm.h"

#include "cute/layout.hpp"
#include "cute/numeric/integral_constant.hpp"
//////////////////////////////////////////////////////////////////////////////

namespace cutlass::gemm {
using namespace cute;

//////////////////////////////////////////////////////////////////////////////

//
// Policies for categorical dispatch of mainloop against kernel grid schedules
//
struct KernelMultistage { };
struct KernelTma { };
struct KernelTmaWarpSpecialized { };
struct KernelTmaWarpSpecializedPingpong { };
struct KernelTmaWarpSpecializedCooperative { };

// FP8 related policies (including Fast Accumulation)
struct KernelTmaWarpSpecializedFP8FastAccum : KernelTmaWarpSpecialized { };
struct KernelTmaWarpSpecializedPingpongFP8FastAccum : KernelTmaWarpSpecializedPingpong { };
struct KernelTmaWarpSpecializedCooperativeFP8FastAccum: KernelTmaWarpSpecializedCooperative { };

// Policies for dispatch of epilogue
struct EpilogueDefault { };
struct EpilogueTransposed { };

//
// Collective Mainloop Policies
//

// 2 stage pipeline through 1 stage in smem, 1 in rmem, WITHOUT predicated gmem loads
struct MainloopSm70TwoStageUnpredicated {
  constexpr static int Stages = 2;
  using ArchTag = arch::Sm70;
  using Schedule = KernelMultistage;
  using ClusterShape = Shape<_1,_1,_1>;
};

// 2 stage pipeline through 1 stage in smem, 1 in rmem, with predicated gmem loads
struct MainloopSm70TwoStage {
  constexpr static int Stages = 2;
  using ArchTag = arch::Sm70;
  using Schedule = KernelMultistage;
  using ClusterShape = Shape<_1,_1,_1>;
};

// n-buffer in smem (cp.async), pipelined with registers, WITHOUT predicated gmem loads
template<int Stages_>
struct MainloopSm80CpAsyncUnpredicated {
  constexpr static int Stages = Stages_;
  using ArchTag = arch::Sm80;
  using Schedule = KernelMultistage;
  using ClusterShape = Shape<_1,_1,_1>;
};

// n-buffer in smem (cp.async), pipelined with registers, with predicated gmem loads
template<int Stages_>
struct MainloopSm80CpAsync {
  constexpr static int Stages = Stages_;
  using ArchTag = arch::Sm80;
  using Schedule = KernelMultistage;
  using ClusterShape = Shape<_1,_1,_1>;
};

// n-buffer in smem (cp.async), pipelined with Hopper GMMA, WITHOUT predicated gmem loads
template<
  int Stages_,
  class ClusterShape_ = Shape<_1,_1,_1>
>
struct MainloopSm90CpAsyncGmmaUnpredicated {
  constexpr static int Stages = Stages_;
  using ClusterShape = ClusterShape_;
  using ArchTag = arch::Sm90;
  using Schedule = KernelMultistage;
};

// n-buffer in smem (cp.async), pipelined with Hopper GMMA, with predicated gmem loads
template<
  int Stages_,
  class ClusterShape_ = Shape<_1,_1,_1>
>
struct MainloopSm90CpAsyncGmma {
  constexpr static int Stages = Stages_;
  using ClusterShape = ClusterShape_;
  using ArchTag = arch::Sm90;
  using Schedule = KernelMultistage;
};

// n-buffer in smem (Hopper TMA), pipelined with Hopper GMMA and TMA, static schedule between TMA and GMMA
template<
  int Stages_,
  class ClusterShape_ = Shape<_1,_1,_1>,
  int PipelineAsyncMmaStages_ = 1
>
struct MainloopSm90TmaGmma {
  constexpr static int Stages = Stages_;
  using ClusterShape = ClusterShape_;
  constexpr static int PipelineAsyncMmaStages = PipelineAsyncMmaStages_;
  using ArchTag = arch::Sm90;
  using Schedule = KernelTma;
};

// n-buffer in smem (Hopper TMA), pipelined with Hopper GMMA and TMA, Warp specialized dynamic schedule
template<
  int Stages_,
  class ClusterShape_ = Shape<_1,_1,_1>,
  class KernelSchedule = KernelTmaWarpSpecializedCooperative
>
struct MainloopSm90TmaGmmaWarpSpecialized {
  constexpr static int Stages = Stages_;
  using ClusterShape = ClusterShape_;
  using ArchTag = arch::Sm90;
  using Schedule = KernelSchedule;
};

// n-buffer in smem (Hopper TMA), pipelined with Hopper GMMA and TMA, Warp specialized dynamic schedule
// With GMMA's A data from registers.
template<
  int Stages_,
  class ClusterShape_ = Shape<_1,_1,_1>,
  class KernelSchedule = KernelTmaWarpSpecialized,
  int PipelineAsyncMmaStages_ = 0
>
struct MainloopSm90TmaGmmaRmemAWarpSpecialized {
  constexpr static int Stages = Stages_;
  using ClusterShape = ClusterShape_;
  constexpr static int PipelineAsyncMmaStages = PipelineAsyncMmaStages_;
  using ArchTag = arch::Sm90;
  using Schedule = KernelSchedule;
  static_assert(
    cute::is_same_v<Schedule, KernelTmaWarpSpecialized> ||
    cute::is_same_v<Schedule, KernelTmaWarpSpecializedPingpong> ||
    cute::is_same_v<Schedule, KernelTmaWarpSpecializedCooperative>,
    "KernelSchedule must be one of the warp specialized policies");
};

// n-buffer in smem (Hopper TMA), pipelined with Hopper GMMA and TMA, Warp specialized dynamic schedule
// For FP8 kernels
template<
  int Stages_,
  class ClusterShape_ = Shape<_1,_1,_1>,
  class KernelSchedule = KernelTmaWarpSpecialized
>
struct MainloopSm90TmaGmmaWarpSpecializedFP8
  : MainloopSm90TmaGmmaWarpSpecialized<Stages_, ClusterShape_, KernelSchedule> { 
  static_assert(
    cute::is_same_v<KernelSchedule, KernelTmaWarpSpecialized> ||
    cute::is_same_v<KernelSchedule, KernelTmaWarpSpecializedPingpong> ||
    cute::is_same_v<KernelSchedule, KernelTmaWarpSpecializedCooperative>,
    "KernelSchedule must be one of the warp specialized policies");
};

//////////////////////////////////////////////////////////////////////////////

} // namespace cutlass::gemm
