// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright Contributors to the Kokkos project

#ifndef KOKKOS_STD_ALGORITHMS_FOR_EACH_N_HPP
#define KOKKOS_STD_ALGORITHMS_FOR_EACH_N_HPP

#include "impl/Kokkos_ForEachForEachN.hpp"
#include <Kokkos_Iterator.hpp>

namespace Kokkos {
namespace Experimental {

//
// overload set accepting execution space
//
template <
    class ExecutionSpace, class IteratorType, class SizeType,
    class UnaryFunctorType,
    std::enable_if_t<Kokkos::is_execution_space_v<ExecutionSpace>, int> = 0>
IteratorType for_each_n(const std::string& label, const ExecutionSpace& ex,
                        IteratorType first, SizeType n,
                        UnaryFunctorType functor) {
  return Impl::for_each_n_exespace_impl(label, ex, first, n,
                                        std::move(functor));
}

template <
    class ExecutionSpace, class IteratorType, class SizeType,
    class UnaryFunctorType,
    std::enable_if_t<Kokkos::is_execution_space_v<ExecutionSpace>, int> = 0>
IteratorType for_each_n(const ExecutionSpace& ex, IteratorType first,
                        SizeType n, UnaryFunctorType functor) {
  return Impl::for_each_n_exespace_impl(
      "Kokkos::for_each_n_iterator_api_default", ex, first, n,
      std::move(functor));
}

template <
    class ExecutionSpace, class DataType, class... Properties, class SizeType,
    class UnaryFunctorType,
    std::enable_if_t<Kokkos::is_execution_space_v<ExecutionSpace>, int> = 0>
auto for_each_n(const std::string& label, const ExecutionSpace& ex,
                const ::Kokkos::View<DataType, Properties...>& v, SizeType n,
                UnaryFunctorType functor) {
  Impl::static_assert_is_admissible_to_kokkos_std_algorithms(v);

  namespace KE = ::Kokkos::Experimental;
  return Impl::for_each_n_exespace_impl(label, ex, KE::begin(v), n,
                                        std::move(functor));
}

template <
    class ExecutionSpace, class DataType, class... Properties, class SizeType,
    class UnaryFunctorType,
    std::enable_if_t<Kokkos::is_execution_space_v<ExecutionSpace>, int> = 0>
auto for_each_n(const ExecutionSpace& ex,
                const ::Kokkos::View<DataType, Properties...>& v, SizeType n,
                UnaryFunctorType functor) {
  Impl::static_assert_is_admissible_to_kokkos_std_algorithms(v);

  namespace KE = ::Kokkos::Experimental;
  return Impl::for_each_n_exespace_impl("Kokkos::for_each_n_view_api_default",
                                        ex, KE::begin(v), n,
                                        std::move(functor));
}

//
// overload set accepting a team handle
// Note: for now omit the overloads accepting a label
// since they cause issues on device because of the string allocation.
//

template <class TeamHandleType, class IteratorType, class SizeType,
          class UnaryFunctorType,
          std::enable_if_t<Kokkos::is_team_handle_v<TeamHandleType>, int> = 0>
KOKKOS_FUNCTION IteratorType for_each_n(const TeamHandleType& teamHandle,
                                        IteratorType first, SizeType n,
                                        UnaryFunctorType functor) {
  return Impl::for_each_n_team_impl(teamHandle, first, n, std::move(functor));
}

template <class TeamHandleType, class DataType, class... Properties,
          class SizeType, class UnaryFunctorType,
          std::enable_if_t<Kokkos::is_team_handle_v<TeamHandleType>, int> = 0>
KOKKOS_FUNCTION auto for_each_n(
    const TeamHandleType& teamHandle,
    const ::Kokkos::View<DataType, Properties...>& v, SizeType n,
    UnaryFunctorType functor) {
  Impl::static_assert_is_admissible_to_kokkos_std_algorithms(v);

  namespace KE = ::Kokkos::Experimental;
  return Impl::for_each_n_team_impl(teamHandle, KE::begin(v), n,
                                    std::move(functor));
}

}  // namespace Experimental
}  // namespace Kokkos

#endif
