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/*! \file
    \brief Utilities for packing constructing canonical CuTe stride types for 3.x mainloop params.
*/

#pragma once

#include "cute/stride.hpp"

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

namespace cutlass {

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

// Strides without batch mode

template <class IntT>
cute::Stride<IntT, cute::Int<1>>
make_cute_packed_stride(cute::Stride<IntT, cute::Int<1>> s, cute::Shape<int,int,int> shape_MKL) {
  static_assert(std::is_integral_v<IntT>,
    "Stride must have an integral type so it can be set dynamically. Static strides not supported.");
  auto s_copy = s;
  cute::get<0>(s_copy) = static_cast<IntT>(cute::get<1>(shape_MKL));
  return s_copy;
}

template <class IntT>
cute::Stride<cute::Int<1>, IntT>
make_cute_packed_stride(cute::Stride<cute::Int<1>, IntT> s, cute::Shape<int,int,int> shape_MKL) {
  static_assert(std::is_integral_v<IntT>,
    "Stride must have an integral type so it can be set dynamically. Static strides not supported.");
  auto s_copy = s;
  cute::get<1>(s_copy) = static_cast<IntT>(cute::get<0>(shape_MKL));
  return s_copy;
}

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

// Strides with batch mode

template <class IntT>
cute::Stride<IntT, cute::Int<1>, int64_t>
make_cute_packed_stride(cute::Stride<IntT, cute::Int<1>, int64_t> s, cute::Shape<int,int,int> shape_MKL) {
  static_assert(std::is_integral_v<IntT>,
    "Stride must have an integral type so it can be set dynamically. Static strides not supported.");
  auto s_copy = s;
  cute::get<0>(s_copy) = static_cast<IntT>(cute::get<1>(shape_MKL));
  int batch_count =  cute::get<2>(shape_MKL);
  if (batch_count > 1) {
    cute::get<2>(s_copy) = static_cast<IntT>(cute::get<0>(shape_MKL) * cute::get<1>(shape_MKL));
  }
  else {
    cute::get<2>(s_copy) = static_cast<IntT>(0);
  }
  return s_copy;
}

template <class IntT>
cute::Stride<cute::Int<1>, IntT, int64_t>
make_cute_packed_stride(cute::Stride<cute::Int<1>, IntT, int64_t> s, cute::Shape<int,int,int> shape_MKL) {
  static_assert(std::is_integral_v<IntT>,
    "Stride must have an integral type so it can be set dynamically. Static strides not supported.");
  auto s_copy = s;
  cute::get<1>(s_copy) = static_cast<IntT>(cute::get<0>(shape_MKL));
  int batch_count =  cute::get<2>(shape_MKL);
  if (batch_count > 1) {
    cute::get<2>(s_copy) = static_cast<IntT>(cute::get<0>(shape_MKL) * cute::get<1>(shape_MKL));
  }
  else {
    cute::get<2>(s_copy) = static_cast<IntT>(0);
  }
  return s_copy;
}

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

} // namespace cutlass
