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#pragma once

#include <thrust/detail/config.h>

#include <thrust/system/hip/config.h>
#include <thrust/system/hip/detail/cross_system.h>
#include <thrust/system/hip/detail/execution_policy.h>

THRUST_NAMESPACE_BEGIN

template <typename DerivedPolicy, typename InputIt, typename OutputIt>
__host__ __device__
OutputIt copy(const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
              InputIt                                                     first,
              InputIt                                                     last,
              OutputIt                                                    result);

template <class DerivedPolicy, class InputIt, class Size, class OutputIt>
__host__ __device__
OutputIt copy_n(const thrust::detail::execution_policy_base<DerivedPolicy>& exec,
                InputIt                                                     first,
                Size                                                        n,
                OutputIt                                                    result);

namespace hip_rocprim
{

// D->D copy requires HIP compiler
template <class System, class InputIterator, class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION
copy(execution_policy<System>& system,
     InputIterator             first,
     InputIterator             last,
     OutputIterator            result);

template <class System1, class System2, class InputIterator, class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION copy(cross_system<System1, System2> systems,
                                        InputIterator                  first,
                                        InputIterator                  last,
                                        OutputIterator                 result);

template <class System, class InputIterator, class Size, class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION
copy_n(execution_policy<System>& system,
       InputIterator             first,
       Size                      n,
       OutputIterator            result);

template <class System1, class System2, class InputIterator, class Size, class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION
copy_n(cross_system<System1, System2> systems, InputIterator first, Size n, OutputIterator result);

} // namespace hip_rocprim
THRUST_NAMESPACE_END

#include <thrust/system/hip/detail/internal/copy_cross_system.h>
#include <thrust/system/hip/detail/internal/copy_device_to_device.h>
#include <thrust/system/hip/detail/par_to_seq.h>

THRUST_NAMESPACE_BEGIN
namespace hip_rocprim
{

#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_HIP
// D->D copy requires HIP compiler

__thrust_exec_check_disable__ template <class System, class InputIterator, class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION
copy(execution_policy<System>& system,
     InputIterator             first,
     InputIterator             last,
     OutputIterator            result)
{
    // struct workaround is required for HIP-clang
    struct workaround
    {
        __host__ static OutputIterator par(execution_policy<System>& system,
                                           InputIterator             first,
                                           InputIterator             last,
                                           OutputIterator            result)
        {
            return __copy::device_to_device(system, first, last, result);
        }
        __device__ static OutputIterator seq(execution_policy<System>& system,
                                             InputIterator             first,
                                             InputIterator             last,
                                             OutputIterator            result)
        {
            return thrust::copy(cvt_to_seq(derived_cast(system)), first, last, result);
        }
  };

#if __THRUST_HAS_HIPRT__
    return workaround::par(system, first, last, result);
#else
    return workaround::seq(system, first, last, result);
#endif
} // end copy()

__thrust_exec_check_disable__ template <class System,
                                        class InputIterator,
                                        class Size,
                                        class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION
copy_n(execution_policy<System>& system,
       InputIterator             first,
       Size                      n,
       OutputIterator            result)
{
    // struct workaround is required for HIP-clang
    struct workaround
    {
        __host__ static OutputIterator
        par(execution_policy<System>& system, InputIterator first, Size n, OutputIterator result)
        {
            return __copy::device_to_device(system, first, first + n, result);
        }
        __device__ static OutputIterator
        seq(execution_policy<System>& system, InputIterator first, Size n, OutputIterator result)
        {
            return thrust::copy_n(cvt_to_seq(derived_cast(system)), first, n, result);
        }
  };
  #if __THRUST_HAS_HIPRT__
      return workaround::par(system, first, n, result);
  #else
      return workaround::seq(system, first, n, result);
  #endif
} // end copy_n()
#endif

template <class System1, class System2, class InputIterator, class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION copy(cross_system<System1, System2> systems,
                                        InputIterator                  first,
                                        InputIterator                  last,
                                        OutputIterator                 result)
{
    return __copy::cross_system_copy(systems, first, last, result);
} // end copy()

template <class System1, class System2, class InputIterator, class Size, class OutputIterator>
OutputIterator THRUST_HIP_FUNCTION
copy_n(cross_system<System1, System2> systems, InputIterator first, Size n, OutputIterator result)
{
    return __copy::cross_system_copy_n(systems, first, n, result);
} // end copy_n()

} // namespace hip_rocprim
THRUST_NAMESPACE_END

#include <thrust/detail/temporary_array.h>
#include <thrust/memory.h>
