/*
 *  Copyright 2008-2013 NVIDIA Corporation
 *  Modifications Copyright© 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/allocator/allocator_traits.h>
#include <thrust/functional.h>
#include <thrust/iterator/constant_iterator.h>
#include <thrust/transform.h>
#include <thrust/universal_vector.h>

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

using BinaryTestsParams =
  ::testing::Types<Params<thrust::host_vector<char>>,
                   Params<thrust::host_vector<signed char>>,
                   Params<thrust::host_vector<unsigned char>>,
                   Params<thrust::host_vector<short>>,
                   Params<thrust::host_vector<unsigned short>>,
                   Params<thrust::device_vector<char>>,
                   Params<thrust::device_vector<signed char>>,
                   Params<thrust::device_vector<unsigned char>>,
                   Params<thrust::device_vector<short>>,
                   Params<thrust::device_vector<unsigned short>>>;

using BitNegateTestsParams = ::testing::Types<
  Params<thrust::host_vector<signed char>>,
  Params<thrust::host_vector<short>>,
  Params<thrust::host_vector<int>>,
  Params<thrust::device_vector<char>>,
  Params<thrust::device_vector<signed char>>,
  Params<thrust::device_vector<short>>,
  Params<thrust::device_vector<int>>,
  Params<thrust::universal_vector<int>>,
  Params<thrust::device_vector<
    int,
    thrust::mr::stateless_resource_allocator<int, thrust::universal_host_pinned_memory_resource>>>>;

TESTS_DEFINE(BinaryTests, BinaryTestsParams);
TESTS_DEFINE(BitNegateTests, BitNegateTestsParams);

static const size_t num_samples = 10000;

template <typename Vector, typename U>
struct rebind_vector;

template <typename T, typename U, typename Allocator>
struct rebind_vector<thrust::host_vector<T, Allocator>, U>
{
  using alloc_traits = typename thrust::detail::allocator_traits<Allocator>;
  using new_alloc    = typename alloc_traits::template rebind_alloc<U>;
  using type         = thrust::host_vector<U, new_alloc>;
};

template <typename T, typename U, typename Allocator>
struct rebind_vector<thrust::device_vector<T, Allocator>, U>
{
  using type = thrust::device_vector<U, typename Allocator::template rebind<U>::other>;
};

template <typename T, typename U, typename Allocator>
struct rebind_vector<thrust::universal_vector<T, Allocator>, U>
{
  using type = thrust::universal_vector<U, typename Allocator::template rebind<U>::other>;
};

#define BINARY_FUNCTIONAL_PLACEHOLDERS_TEST(name, op, reference_functor)                                        \
  TYPED_TEST(BinaryTests, TestFunctionalPlaceholders##name)                                                     \
  {                                                                                                             \
    SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());                    \
                                                                                                                \
    constexpr size_t NUM_SAMPLES = 10000;                                                                       \
    constexpr size_t ZERO        = 0;                                                                           \
    using Vector                 = typename TestFixture::input_type;                                            \
    using T                      = typename Vector::value_type;                                                 \
                                                                                                                \
    Vector lhs = random_samples<T>(NUM_SAMPLES);                                                                \
    Vector rhs = random_samples<T>(NUM_SAMPLES);                                                                \
    thrust::replace(rhs.begin(), rhs.end(), T(0), T(1));                                                        \
                                                                                                                \
    Vector reference(lhs.size());                                                                               \
    Vector result(lhs.size());                                                                                  \
    using namespace thrust::placeholders;                                                                       \
                                                                                                                \
    thrust::transform(lhs.begin(), lhs.end(), rhs.begin(), reference.begin(), reference_functor<T>());          \
    thrust::transform(lhs.begin(), lhs.end(), rhs.begin(), result.begin(), _1 op _2);                           \
    ASSERT_EQ(reference, result);                                                                               \
                                                                                                                \
    thrust::transform(                                                                                          \
      lhs.begin(), lhs.end(), thrust::make_constant_iterator<T>(1), reference.begin(), reference_functor<T>()); \
    thrust::transform(lhs.begin(), lhs.end(), result.begin(), _1 op T(1));                                      \
    ASSERT_EQ(reference, result);                                                                               \
                                                                                                                \
    thrust::transform(                                                                                          \
      thrust::make_constant_iterator<T>(1, ZERO),                                                               \
      thrust::make_constant_iterator<T>(1, NUM_SAMPLES),                                                        \
      rhs.begin(),                                                                                              \
      reference.begin(),                                                                                        \
      reference_functor<T>());                                                                                  \
    thrust::transform(rhs.begin(), rhs.end(), result.begin(), T(1) op _1);                                      \
    ASSERT_EQ(reference, result);                                                                               \
  }

THRUST_DIAG_PUSH
THRUST_DIAG_SUPPRESS_MSVC(4244) // warning C4244: '=': conversion from 'int' to '_Ty', possible loss of data

BINARY_FUNCTIONAL_PLACEHOLDERS_TEST(BitAnd, &, thrust::bit_and);
BINARY_FUNCTIONAL_PLACEHOLDERS_TEST(BitOr, |, thrust::bit_or);
BINARY_FUNCTIONAL_PLACEHOLDERS_TEST(BitXor, ^, thrust::bit_xor);

template <typename T>
struct bit_negate_reference
{
  THRUST_HOST_DEVICE T operator()(const T& x) const
  {
    return ~x;
  }
};

TYPED_TEST(BitNegateTests, TestFunctionalPlaceholdersBitNegate)
{
  using Vector      = typename TestFixture::input_type;
  using T           = typename Vector::value_type;
  using bool_vector = typename rebind_vector<Vector, bool>::type;

  SCOPED_TRACE(testing::Message() << "with device_id= " << test::set_device_from_ctest());

  Vector input = random_samples<T>(num_samples);

  bool_vector reference(input.size());
  thrust::transform(input.begin(), input.end(), reference.begin(), bit_negate_reference<T>());

  using namespace thrust::placeholders;
  bool_vector result(input.size());
  thrust::transform(input.begin(), input.end(), result.begin(), ~_1);

  ASSERT_EQ(reference, result);
}

THRUST_DIAG_POP