// Copyright (c) 2024-2025 Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

/*
 *  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.
 */

/*! \file thrust/system/hip/hipstdpar/impl/set.hpp
 *  \brief <tt>Set operations</tt> implementation detail header for HIPSTDPAR.
 */

#pragma once

#if defined(__HIPSTDPAR__)

#  include <thrust/execution_policy.h>
#  include <thrust/iterator/discard_iterator.h>
#  include <thrust/set_operations.h>

#  include <algorithm>
#  include <execution>
#  include <utility>

#  include "hipstd.hpp"

namespace std
{
// BEGIN INCLUDES
template <typename I0, typename I1, enable_if_t<::hipstd::is_offloadable_iterator<I0, I1>()>* = nullptr>
inline bool includes(execution::parallel_unsequenced_policy, I0 f0, I0 l0, I1 f1, I1 l1)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  ::thrust::discard_iterator<> cnt{0};

  return ::thrust::set_difference(::thrust::device, f1, l1, f0, l0, cnt) == cnt;
}

template <typename I0, typename I1, enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1>()>* = nullptr>
inline bool includes(execution::parallel_unsequenced_policy, I0 f0, I0 l0, I1 f1, I1 l1)
{
  ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                          typename iterator_traits<I1>::iterator_category>();

  return ::std::includes(::std::execution::par, f0, l0, f1, l1);
}

template <typename I0,
          typename I1,
          typename R,
          enable_if_t<::hipstd::is_offloadable_iterator<I0, I1>() && ::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline bool includes(execution::parallel_unsequenced_policy, I0 f0, I0 l0, I1 f1, I1 l1, R r)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  ::thrust::discard_iterator<> cnt{0};

  return ::thrust::set_difference(::thrust::device, f1, l1, f0, l0, cnt, ::std::move(r)) == cnt;
}

template <typename I0,
          typename I1,
          typename R,
          enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1>() || !::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline bool includes(execution::parallel_unsequenced_policy, I0 f0, I0 l0, I1 f1, I1 l1, R r)
{
  if constexpr (!::hipstd::is_offloadable_iterator<I0, I1>())
  {
    ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                            typename iterator_traits<I1>::iterator_category>();
  }
  if constexpr (!::hipstd::is_offloadable_callable<R>())
  {
    ::hipstd::unsupported_callable_type<R>();
  }

  return ::std::includes(::std::execution::par, f1, l1, f0, l0, ::std::move(r));
}
// END INCLUDES

// BEGIN SET_UNION
template <typename I0, typename I1, typename O, enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>>* = nullptr>
inline O set_union(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_union(::thrust::device, fi0, li0, fi1, li1, fo);
}

template <typename I0, typename I1, typename O, enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>>* = nullptr>
inline O set_union(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                          typename iterator_traits<I1>::iterator_category,
                                          typename iterator_traits<O>::iterator_category>();

  return ::std::set_union(::std::execution::par, fi0, li0, fi1, li1, fo);
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>() && ::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_union(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_union(::thrust::device, fi0, li0, fi1, li1, fo, ::std::move(r));
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>() || !::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_union(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  if constexpr (!::hipstd::is_offloadable_iterator<I0, I1, O>())
  {
    ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                            typename iterator_traits<I1>::iterator_category,
                                            typename iterator_traits<O>::iterator_category>();
  }
  if constexpr (!::hipstd::is_offloadable_callable<R>())
  {
    ::hipstd::unsupported_callable_type<R>();
  }

  return ::std::set_union(::std::execution::par, fi0, li0, fi1, li1, fo, ::std::move(r));
}
// END SET_UNION

// BEGIN SET_INTERSECTION
template <typename I0, typename I1, typename O, enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>()>* = nullptr>
inline O set_intersection(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_intersection(::thrust::device, fi0, li0, fi1, li1, fo);
}

template <typename I0, typename I1, typename O, enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>()>* = nullptr>
inline O set_intersection(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                          typename iterator_traits<I1>::iterator_category,
                                          typename iterator_traits<O>::iterator_category>();

  return ::std::set_intersection(::std::execution::par, fi0, li0, fi1, li1, fo);
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>() && ::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_intersection(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_intersection(::thrust::device, fi0, li0, fi1, li1, fo, ::std::move(r));
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>() || !::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_intersection(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  if constexpr (!::hipstd::is_offloadable_iterator<I0, I1, O>())
  {
    ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                            typename iterator_traits<I1>::iterator_category,
                                            typename iterator_traits<O>::iterator_category>();
  }
  if constexpr (!::hipstd::is_offloadable_callable<R>())
  {
    ::hipstd::unsupported_callable_type<R>();
  }

  return ::std::set_intersection(::std::execution::par, fi0, li0, fi1, li1, fo, ::std::move(r));
}
// END SET_INTERSECTION

// BEGIN SET_DIFFERENCE
template <typename I0, typename I1, typename O, enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>()>* = nullptr>
inline O set_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_difference(::thrust::device, fi0, li0, fi1, li1, fo);
}

template <typename I0, typename I1, typename O, enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>()>* = nullptr>
inline O set_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                          typename iterator_traits<I1>::iterator_category,
                                          typename iterator_traits<O>::iterator_category>();

  return ::std::set_difference(::std::execution::par, fi0, li0, fi1, li1, fo);
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>() && ::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_difference(::thrust::device, fi0, li0, fi1, li1, fo, ::std::move(r));
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>() || !::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  if constexpr (!::hipstd::is_offloadable_iterator<I0, I1, O>())
  {
    ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                            typename iterator_traits<I1>::iterator_category,
                                            typename iterator_traits<O>::iterator_category>();
  }
  if constexpr (!::hipstd::is_offloadable_callable<R>())
  {
    ::hipstd::unsupported_callable_type<R>();
  }

  return ::std::set_difference(::std::execution::par, fi0, li0, fi1, li1, fo, ::std::move(r));
}
// END SET_DIFFERENCE

// BEGIN SET_SYMMETRIC_DIFFERENCE
template <typename I0, typename I1, typename O, enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>()>* = nullptr>
inline O set_symmetric_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_symmetric_difference(::thrust::device, fi0, li0, fi1, li1, fo);
}

template <typename I0, typename I1, typename O, enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>()>* = nullptr>
inline O set_symmetric_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo)
{
  ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                          typename iterator_traits<I1>::iterator_category,
                                          typename iterator_traits<O>::iterator_category>();

  return ::std::set_symmetric_difference(::std::execution::par, fi0, li0, fi1, li1, fo);
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<::hipstd::is_offloadable_iterator<I0, I1, O>() && ::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_symmetric_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  ::hipstd::__maybe_bind_globals();

  ::hipstd::warn_if_no_xnack();
  return ::thrust::set_symmetric_difference(::thrust::device, fi0, li0, fi1, li1, fo, ::std::move(r));
}

template <
  typename I0,
  typename I1,
  typename O,
  typename R,
  enable_if_t<!::hipstd::is_offloadable_iterator<I0, I1, O>() || !::hipstd::is_offloadable_callable<R>()>* = nullptr>
inline O set_symmetric_difference(execution::parallel_unsequenced_policy, I0 fi0, I0 li0, I1 fi1, I1 li1, O fo, R r)
{
  if constexpr (!::hipstd::is_offloadable_iterator<I0, I1, O>())
  {
    ::hipstd::unsupported_iterator_category<typename iterator_traits<I0>::iterator_category,
                                            typename iterator_traits<I1>::iterator_category,
                                            typename iterator_traits<O>::iterator_category>();
  }
  if constexpr (!::hipstd::is_offloadable_callable<R>())
  {
    ::hipstd::unsupported_callable_type<R>();
  }

  return ::std::set_symmetric_difference(::std::execution::par, fi0, li0, fi1, li1, fo, ::std::move(r));
}
// END SET_SYMMETRIC_DIFFERENCE
} // namespace std
#else // __HIPSTDPAR__
#  error "__HIPSTDPAR__ should be defined. Please use the '--hipstdpar' compile option."
#endif // __HIPSTDPAR__