// 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_solve
//! @{

//
// solve_gen

template <typename T1, typename T2>
arma_warn_unused inline
    typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                        const Glue<T1, T2, glue_solve_gen_default> >::result
    solve(const Base<typename T1::elem_type, T1>& A,
          const Base<typename T1::elem_type, T2>& B) {
  arma_debug_sigprint();

  return Glue<T1, T2, glue_solve_gen_default>(A.get_ref(), B.get_ref());
}

template <typename T1, typename T2>
inline typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                           bool>::result
solve(Mat<typename T1::elem_type>& out, const Base<typename T1::elem_type, T1>& A,
      const Base<typename T1::elem_type, T2>& B) {
  arma_debug_sigprint();

  const bool status = glue_solve_gen_default::apply(out, A.get_ref(), B.get_ref());

  if (status == false) {
    out.soft_reset();
    arma_warn(3, "solve(): solution not found");
  }

  return status;
}

template <typename T1, typename T2>
arma_warn_unused inline
    typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                        const Glue<T1, T2, glue_solve_gen_full> >::result
    solve(const Base<typename T1::elem_type, T1>& A,
          const Base<typename T1::elem_type, T2>& B, const solve_opts::opts& opts) {
  arma_debug_sigprint();

  return Glue<T1, T2, glue_solve_gen_full>(A.get_ref(), B.get_ref(), opts.flags);
}

template <typename T1, typename T2>
inline typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                           bool>::result
solve(Mat<typename T1::elem_type>& out, const Base<typename T1::elem_type, T1>& A,
      const Base<typename T1::elem_type, T2>& B, const solve_opts::opts& opts) {
  arma_debug_sigprint();

  const bool status =
      glue_solve_gen_full::apply(out, A.get_ref(), B.get_ref(), opts.flags);

  if (status == false) {
    out.soft_reset();
    arma_warn(3, "solve(): solution not found");
  }

  return status;
}

//
// solve_tri

template <typename T1, typename T2>
arma_warn_unused inline
    typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                        const Glue<T1, T2, glue_solve_tri_default> >::result
    solve(const Op<T1, op_trimat>& A, const Base<typename T1::elem_type, T2>& B) {
  arma_debug_sigprint();

  uword flags = uword(0);

  if (A.aux_uword_a == 0) {
    flags |= solve_opts::flag_triu;
  }
  if (A.aux_uword_a == 1) {
    flags |= solve_opts::flag_tril;
  }

  return Glue<T1, T2, glue_solve_tri_default>(A.m, B.get_ref(), flags);
}

template <typename T1, typename T2>
arma_warn_unused inline
    typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                        const Glue<T1, T2, glue_solve_tri_full> >::result
    solve(const Op<T1, op_trimat>& A, const Base<typename T1::elem_type, T2>& B,
          const solve_opts::opts& opts) {
  arma_debug_sigprint();

  uword flags = opts.flags;

  if (A.aux_uword_a == 0) {
    flags |= solve_opts::flag_triu;
  }
  if (A.aux_uword_a == 1) {
    flags |= solve_opts::flag_tril;
  }

  return Glue<T1, T2, glue_solve_tri_full>(A.m, B.get_ref(), flags);
}

template <typename T1, typename T2>
inline typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                           bool>::result
solve(Mat<typename T1::elem_type>& out, const Op<T1, op_trimat>& A,
      const Base<typename T1::elem_type, T2>& B) {
  arma_debug_sigprint();

  uword flags = uword(0);

  if (A.aux_uword_a == 0) {
    flags |= solve_opts::flag_triu;
  }
  if (A.aux_uword_a == 1) {
    flags |= solve_opts::flag_tril;
  }

  const bool status = glue_solve_tri_default::apply(out, A.m, B.get_ref(), flags);

  if (status == false) {
    out.soft_reset();
    arma_warn(3, "solve(): solution not found");
  }

  return status;
}

template <typename T1, typename T2>
inline typename enable_if2<is_supported_blas_type<typename T1::elem_type>::value,
                           bool>::result
solve(Mat<typename T1::elem_type>& out, const Op<T1, op_trimat>& A,
      const Base<typename T1::elem_type, T2>& B, const solve_opts::opts& opts) {
  arma_debug_sigprint();

  uword flags = opts.flags;

  if (A.aux_uword_a == 0) {
    flags |= solve_opts::flag_triu;
  }
  if (A.aux_uword_a == 1) {
    flags |= solve_opts::flag_tril;
  }

  const bool status = glue_solve_tri_full::apply(out, A.m, B.get_ref(), flags);

  if (status == false) {
    out.soft_reset();
    arma_warn(3, "solve(): solution not found");
  }

  return status;
}

//! @}
