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#pragma once

#if THRUST_DEVICE_COMPILER == THRUST_DEVICE_COMPILER_HIP
#include <iterator>
#include <thrust/detail/minmax.h>
#include <thrust/distance.h>
#include <thrust/system/hip/detail/reduce.h>

// rocPRIM includes
#include <rocprim/rocprim.hpp>

THRUST_NAMESPACE_BEGIN

namespace hip_rocprim
{

template <class Derived,
          class InputIt1,
          class InputIt2,
          class T,
          class ReduceOp,
          class ProductOp>
T THRUST_HIP_FUNCTION
inner_product(execution_policy<Derived>& policy,
              InputIt1                   first1,
              InputIt1                   last1,
              InputIt2                   first2,
              T                          init,
              ReduceOp                   reduce_op,
              ProductOp                  product_op)
{
    typedef typename iterator_traits<InputIt1>::difference_type size_type;
    size_type num_items = static_cast<size_type>(thrust::distance(first1, last1));
    typedef transform_pair_of_input_iterators_t<T, InputIt1, InputIt2, ProductOp>
        binop_iterator_t;

    return reduce_n(
        policy, binop_iterator_t(first1, first2, product_op), num_items, init, reduce_op
    );
}

template <class Derived, class InputIt1, class InputIt2, class T>
T THRUST_HIP_FUNCTION
inner_product(execution_policy<Derived>& policy,
              InputIt1                   first1,
              InputIt1                   last1,
              InputIt2                   first2,
              T                          init)
{
    return inner_product(
        policy, first1, last1, first2, init, plus<T>(), multiplies<T>()
    );
}

} // namespace hip_rocprim

THRUST_NAMESPACE_END
#endif