// 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_wishrnd
//! @{

template <typename T1>
arma_warn_unused inline typename enable_if2<is_real<typename T1::elem_type>::value,
                                            const Op<T1, op_wishrnd> >::result
wishrnd(const Base<typename T1::elem_type, T1>& S, typename T1::elem_type df) {
  arma_debug_sigprint();

  return Op<T1, op_wishrnd>(S.get_ref(), df, uword(1), uword(0));
}

template <typename T1, typename T2>
arma_warn_unused inline typename enable_if2<is_real<typename T1::elem_type>::value,
                                            const Op<T2, op_wishrnd> >::result
wishrnd(const Base<typename T1::elem_type, T1>& S, typename T1::elem_type df,
        const Base<typename T1::elem_type, T2>& D) {
  arma_debug_sigprint();
  arma_ignore(S);

  return Op<T2, op_wishrnd>(D.get_ref(), df, uword(2), uword(0));
}

template <typename T1>
inline typename enable_if2<is_real<typename T1::elem_type>::value, bool>::result wishrnd(
    Mat<typename T1::elem_type>& W, const Base<typename T1::elem_type, T1>& S,
    typename T1::elem_type df) {
  arma_debug_sigprint();

  const bool status = op_wishrnd::apply_direct(W, S.get_ref(), df, uword(1));

  if (status == false) {
    W.soft_reset();
    arma_warn(3, "wishrnd(): given matrix is not symmetric positive definite");
  }

  return status;
}

template <typename T1, typename T2>
inline typename enable_if2<is_real<typename T1::elem_type>::value, bool>::result wishrnd(
    Mat<typename T1::elem_type>& W, const Base<typename T1::elem_type, T1>& S,
    typename T1::elem_type df, const Base<typename T1::elem_type, T2>& D) {
  arma_debug_sigprint();
  arma_ignore(S);

  const bool status = op_wishrnd::apply_direct(W, D.get_ref(), df, uword(2));

  if (status == false) {
    W.soft_reset();
    arma_warn(3, "wishrnd(): problem with given 'D' matrix");
  }

  return status;
}

//

template <typename T1>
arma_warn_unused inline typename enable_if2<is_real<typename T1::elem_type>::value,
                                            const Op<T1, op_iwishrnd> >::result
iwishrnd(const Base<typename T1::elem_type, T1>& T, typename T1::elem_type df) {
  arma_debug_sigprint();

  return Op<T1, op_iwishrnd>(T.get_ref(), df, uword(1), uword(0));
}

template <typename T1, typename T2>
arma_warn_unused inline typename enable_if2<is_real<typename T1::elem_type>::value,
                                            const Op<T2, op_iwishrnd> >::result
iwishrnd(const Base<typename T1::elem_type, T1>& T, typename T1::elem_type df,
         const Base<typename T1::elem_type, T2>& Dinv) {
  arma_debug_sigprint();
  arma_ignore(T);

  return Op<T2, op_iwishrnd>(Dinv.get_ref(), df, uword(2), uword(0));
}

template <typename T1>
inline typename enable_if2<is_real<typename T1::elem_type>::value, bool>::result iwishrnd(
    Mat<typename T1::elem_type>& W, const Base<typename T1::elem_type, T1>& T,
    typename T1::elem_type df) {
  arma_debug_sigprint();

  const bool status = op_iwishrnd::apply_direct(W, T.get_ref(), df, uword(1));

  if (status == false) {
    W.soft_reset();
    arma_warn(3,
              "iwishrnd(): given matrix is not symmetric positive definite and/or df is "
              "too low");
  }

  return status;
}

template <typename T1, typename T2>
inline typename enable_if2<is_real<typename T1::elem_type>::value, bool>::result iwishrnd(
    Mat<typename T1::elem_type>& W, const Base<typename T1::elem_type, T1>& T,
    typename T1::elem_type df, const Base<typename T1::elem_type, T2>& Dinv) {
  arma_debug_sigprint();
  arma_ignore(T);

  const bool status = op_iwishrnd::apply_direct(W, Dinv.get_ref(), df, uword(2));

  if (status == false) {
    W.soft_reset();
    arma_warn(3, "wishrnd(): problem with given 'Dinv' matrix and/or df is too low");
  }

  return status;
}

//! @}
