// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// 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.
// ------------------------------------------------------------------------

//! \addtogroup fn_fft
//! @{

// 1D FFT & 1D IFFT

template <typename T1>
arma_warn_unused inline typename enable_if2<
    (is_arma_type<T1>::value && is_real<typename T1::elem_type>::value),
    const mtOp<std::complex<typename T1::pod_type>, T1, op_fft_real> >::result
fft(const T1& A) {
  arma_extra_debug_sigprint();

  return mtOp<std::complex<typename T1::pod_type>, T1, op_fft_real>(A, uword(0),
                                                                    uword(1));
}

template <typename T1>
arma_warn_unused inline typename enable_if2<
    (is_arma_type<T1>::value && is_real<typename T1::elem_type>::value),
    const mtOp<std::complex<typename T1::pod_type>, T1, op_fft_real> >::result
fft(const T1& A, const uword N) {
  arma_extra_debug_sigprint();

  return mtOp<std::complex<typename T1::pod_type>, T1, op_fft_real>(A, N, uword(0));
}

template <typename T1>
arma_warn_unused inline typename enable_if2<(is_arma_type<T1>::value &&
                                             (is_cx_float<typename T1::elem_type>::yes ||
                                              is_cx_double<typename T1::elem_type>::yes)),
                                            const Op<T1, op_fft_cx> >::result
fft(const T1& A) {
  arma_extra_debug_sigprint();

  return Op<T1, op_fft_cx>(A, uword(0), uword(1));
}

template <typename T1>
arma_warn_unused inline typename enable_if2<(is_arma_type<T1>::value &&
                                             (is_cx_float<typename T1::elem_type>::yes ||
                                              is_cx_double<typename T1::elem_type>::yes)),
                                            const Op<T1, op_fft_cx> >::result
fft(const T1& A, const uword N) {
  arma_extra_debug_sigprint();

  return Op<T1, op_fft_cx>(A, N, uword(0));
}

template <typename T1>
arma_warn_unused inline typename enable_if2<(is_arma_type<T1>::value &&
                                             (is_cx_float<typename T1::elem_type>::yes ||
                                              is_cx_double<typename T1::elem_type>::yes)),
                                            const Op<T1, op_ifft_cx> >::result
ifft(const T1& A) {
  arma_extra_debug_sigprint();

  return Op<T1, op_ifft_cx>(A, uword(0), uword(1));
}

template <typename T1>
arma_warn_unused inline typename enable_if2<(is_arma_type<T1>::value &&
                                             (is_cx_float<typename T1::elem_type>::yes ||
                                              is_cx_double<typename T1::elem_type>::yes)),
                                            const Op<T1, op_ifft_cx> >::result
ifft(const T1& A, const uword N) {
  arma_extra_debug_sigprint();

  return Op<T1, op_ifft_cx>(A, N, uword(0));
}

//! @}
