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//#define CUTLASS_DEBUG_TRACE_LEVEL 1

#include "cutlass_unit_test.h"

#include <cutlass/trace.h>

#include <iostream>

#include <cute/tensor.hpp>

using namespace cute;

template <class LayoutA, class LayoutB>
void
test_distribute(LayoutA const& layoutA,
                LayoutB const& layoutB)
{
  auto layoutR = domain_distribute(shape(layoutA), shape(layoutB));

  CUTLASS_TRACE_HOST("test_distribute()");
  CUTLASS_TRACE_HOST(layoutA << "  <->  " << layoutB);
  CUTLASS_TRACE_HOST("  =>  ");
  CUTLASS_TRACE_HOST(layoutR);

  EXPECT_TRUE(evenly_divides(layoutB, size(layoutR)));
  EXPECT_TRUE(evenly_divides(layoutA, layoutR));

  // Post-condition on the codomain of the distribute
  for (int i = 0; i < size(layoutR); ++i) {
    for (int j = i+1; j < size(layoutR); ++j) {
      EXPECT_TRUE(layoutR(i) < layoutR(j));     // Surjective and Ordered
    }
  }
}


TEST(CuTe_core, Distribute)
{
  CUTLASS_TRACE_HOST("-------------------------------");
  CUTLASS_TRACE_HOST("DOMAIN DISTRIBUTE"              );
  CUTLASS_TRACE_HOST("-------------------------------");

  {
    auto shape_a = Shape<Shape<_64,_3>,Shape<_8,_8>>{};
    auto shape_b = _128{};

    test_distribute(shape_a, shape_b);
  }

  {
    auto shape_a = Shape<Int<192>,Shape<_8,_8>>{};
    auto shape_b = _128{};

    test_distribute(shape_a, shape_b);
  }

  {
    auto shape_a = Shape<Shape<_64,_3>,Shape<_8,_8>>{};
    auto shape_b = _128{} * _8{};

    test_distribute(shape_a, shape_b);
  }

  {
    auto shape_a = Shape<Int<192>,Shape<_8,_8>>{};
    auto shape_b = _128{} * _8{};

    test_distribute(shape_a, shape_b);
  }

  {
    auto shape_a = Shape<Shape<_64,_3>>{};
    auto shape_b = _128{};

    test_distribute(shape_a, shape_b);
  }
}
