// 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_reshape
//! @{

template <typename T1>
arma_warn_unused inline
    typename enable_if2<is_arma_type<T1>::value, const Op<T1, op_reshape> >::result
    reshape(const T1& X, const uword new_n_rows, const uword new_n_cols) {
  arma_debug_sigprint();

  return Op<T1, op_reshape>(X, new_n_rows, new_n_cols);
}

template <typename T1>
arma_warn_unused inline
    typename enable_if2<is_arma_type<T1>::value, const Op<T1, op_reshape> >::result
    reshape(const T1& X, const SizeMat& s) {
  arma_debug_sigprint();

  return Op<T1, op_reshape>(X, s.n_rows, s.n_cols);
}

template <typename T1>
arma_frown("don't use this form: it will be removed") inline Mat<
    typename T1::elem_type> reshape(const Base<typename T1::elem_type, T1>& X,
                                    const uword new_n_rows, const uword new_n_cols,
                                    const uword dim) {
  arma_debug_sigprint();

  typedef typename T1::elem_type eT;

  arma_conform_check((dim > 1), "reshape(): parameter 'dim' must be 0 or 1");

  const quasi_unwrap<T1> U(X.get_ref());
  const Mat<eT>& A = U.M;

  Mat<eT> out;

  if (dim == 0) {
    op_reshape::apply_mat_noalias(out, A, new_n_rows, new_n_cols);
  } else if (dim == 1) {
    Mat<eT> tmp;

    op_strans::apply_mat_noalias(tmp, A);

    op_reshape::apply_mat_noalias(out, tmp, new_n_rows, new_n_cols);
  }

  return out;
}

template <typename T1>
arma_warn_unused inline const OpCube<T1, op_reshape> reshape(
    const BaseCube<typename T1::elem_type, T1>& X, const uword new_n_rows,
    const uword new_n_cols, const uword new_n_slices) {
  arma_debug_sigprint();

  return OpCube<T1, op_reshape>(X.get_ref(), new_n_rows, new_n_cols, new_n_slices);
}

template <typename T1>
arma_warn_unused inline const OpCube<T1, op_reshape> reshape(
    const BaseCube<typename T1::elem_type, T1>& X, const SizeCube& s) {
  arma_debug_sigprint();

  return OpCube<T1, op_reshape>(X.get_ref(), s.n_rows, s.n_cols, s.n_slices);
}

template <typename T1>
arma_warn_unused inline const SpOp<T1, spop_reshape> reshape(
    const SpBase<typename T1::elem_type, T1>& X, const uword new_n_rows,
    const uword new_n_cols) {
  arma_debug_sigprint();

  return SpOp<T1, spop_reshape>(X.get_ref(), new_n_rows, new_n_cols);
}

template <typename T1>
arma_warn_unused inline const SpOp<T1, spop_reshape> reshape(
    const SpBase<typename T1::elem_type, T1>& X, const SizeMat& s) {
  arma_debug_sigprint();

  return SpOp<T1, spop_reshape>(X.get_ref(), s.n_rows, s.n_cols);
}

//! @}
