/*
 *  Copyright 2008-2013 NVIDIA Corporation
 *  Modifications Copyright© 2019-2025 Advanced Micro Devices, Inc. All rights reserved.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

#include <thrust/detail/config.h>

#include <thrust/async/for_each.h>
#include <thrust/device_vector.h>
#include <thrust/host_vector.h>

#include "test_param_fixtures.hpp"
#include "test_utils.hpp"

#define DEFINE_ASYNC_FOR_EACH_CALLABLE(name, ...)                                         \
  struct THRUST_PP_CAT2(name, _fn)                                                        \
  {                                                                                       \
    template <typename ForwardIt, typename Sentinel, typename UnaryFunction>              \
    __host__ auto operator()(ForwardIt&& first, Sentinel&& last, UnaryFunction&& f) const \
      THRUST_DECLTYPE_RETURNS(::thrust::async::for_each(                                  \
        __VA_ARGS__ THRUST_PP_COMMA_IF(THRUST_PP_ARITY(__VA_ARGS__)) THRUST_FWD(first),   \
        THRUST_FWD(last),                                                                 \
        THRUST_FWD(f)))                                                                   \
  };                                                                                      \
  /**/

DEFINE_ASYNC_FOR_EACH_CALLABLE(invoke_async_for_each);

DEFINE_ASYNC_FOR_EACH_CALLABLE(invoke_async_for_each_device, thrust::device);

#undef DEFINE_ASYNC_FOR_EACH_CALLABLE

struct inplace_divide_by_2
{
  template <typename T>
  __host__ __device__ void operator()(T& x) const
  {
    x /= 2;
  }
};

TESTS_DEFINE(AsyncForEachTests, NumericalTestsParams);

template <typename T, typename AsyncForEachCallable, typename UnaryFunction>
void test_async_for_each()
{
  for (auto size : get_sizes())
  {
    SCOPED_TRACE(testing::Message() << "with size = " << size);
    for (auto seed : get_seeds())
    {
      thrust::host_vector<T> h0_data = get_random_data<T>(size, T(-1000), T(1000), seed);
      thrust::device_vector<T> d0_data(h0_data);

      thrust::for_each(h0_data.begin(), h0_data.end(), UnaryFunction{});

      auto f0 = AsyncForEachCallable{}(d0_data.begin(), d0_data.end(), UnaryFunction{});

      f0.wait();

      ASSERT_EQ(h0_data, d0_data);
    }
  }
};

TYPED_TEST(AsyncForEachTests, TestAsyncForEach)
{
  SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());
  using T = typename TestFixture::input_type;
  test_async_for_each<T, invoke_async_for_each_fn, inplace_divide_by_2>();
}

TYPED_TEST(AsyncForEachTests, TestAsyncForEachPolicy)
{
  SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());
  using T = typename TestFixture::input_type;
  test_async_for_each<T, invoke_async_for_each_device_fn, inplace_divide_by_2>();
}
