// 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_index_min
//! @{

template <typename T1>
arma_warn_unused inline
    typename enable_if2<is_arma_type<T1>::value && resolves_to_vector<T1>::yes,
                        uword>::result
    index_min(const T1& X) {
  arma_debug_sigprint();

  return X.index_min();
}

template <typename T1>
arma_warn_unused arma_inline
    typename enable_if2<is_arma_type<T1>::value && resolves_to_vector<T1>::no,
                        const mtOp<uword, T1, op_index_min> >::result
    index_min(const T1& X) {
  arma_debug_sigprint();

  return mtOp<uword, T1, op_index_min>(X, 0, 0);
}

template <typename T1>
arma_warn_unused arma_inline
    typename enable_if2<is_arma_type<T1>::value,
                        const mtOp<uword, T1, op_index_min> >::result
    index_min(const T1& X, const uword dim) {
  arma_debug_sigprint();

  return mtOp<uword, T1, op_index_min>(X, dim, 0);
}

template <typename T1>
arma_warn_unused arma_inline const mtOpCube<uword, T1, op_index_min> index_min(
    const BaseCube<typename T1::elem_type, T1>& X, const uword dim = 0) {
  arma_debug_sigprint();

  return mtOpCube<uword, T1, op_index_min>(X.get_ref(), dim, 0, 0);
}

template <typename T1>
arma_warn_unused inline typename enable_if2<is_arma_sparse_type<T1>::value &&
                                                resolves_to_sparse_vector<T1>::yes,
                                            typename T1::elem_type>::result
index_min(const T1& x) {
  arma_debug_sigprint();

  return x.index_min();
}

template <typename T1>
arma_warn_unused inline typename enable_if2<is_arma_sparse_type<T1>::value &&
                                                resolves_to_sparse_vector<T1>::no,
                                            Mat<uword> >::result
index_min(const T1& X) {
  arma_debug_sigprint();

  Mat<uword> out;

  op_index_min::apply(out, X, 0);

  return out;
}

template <typename T1>
arma_warn_unused inline
    typename enable_if2<is_arma_sparse_type<T1>::value, Mat<uword> >::result
    index_min(const T1& X, const uword dim) {
  arma_debug_sigprint();

  Mat<uword> out;

  op_index_min::apply(out, X, dim);

  return out;
}

arma_warn_unused inline uword index_min(const SizeMat& s) {
  return (s.n_rows <= s.n_cols) ? uword(0) : uword(1);
}

arma_warn_unused inline uword index_min(const SizeCube& s) {
  const uword tmp_val = (s.n_rows <= s.n_cols) ? s.n_rows : s.n_cols;
  const uword tmp_index = (s.n_rows <= s.n_cols) ? uword(0) : uword(1);

  return (tmp_val <= s.n_slices) ? tmp_index : uword(2);
}

//! @}
