////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1998-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if ! defined (octave_oct_spparms_h)
#define octave_oct_spparms_h 1

#include "octave-config.h"

#include <iosfwd>
#include <string>

#include "str-vec.h"
#include "dColVector.h"

class NDArray;

#define OCTAVE_SPARSE_CONTROLS_SIZE 13

class
OCTAVE_API
octave_sparse_params
{
protected:

  octave_sparse_params (void)
    : params (OCTAVE_SPARSE_CONTROLS_SIZE),
      keys (OCTAVE_SPARSE_CONTROLS_SIZE)
  {
    init_keys ();
    do_defaults ();
  }

public:

  octave_sparse_params (const octave_sparse_params& a)
    : params (a.params), keys (a.keys) { }

  octave_sparse_params& operator = (const octave_sparse_params& a)
  {
    if (&a != this)
      {
        params = a.params;
        keys = a.keys;
      }

    return *this;
  }

  ~octave_sparse_params (void) = default;

  static bool instance_ok (void);

  static void defaults (void);

  static void tight (void);

  static string_vector get_keys (void);

  static ColumnVector get_vals (void);

  static bool set_vals (const NDArray& vals);

  static bool set_key (const std::string& key, const double& val);

  static double get_key (const std::string& key);

  static double get_bandden (void);

  static void print_info (std::ostream& os, const std::string& prefix);

private:

  ColumnVector params;

  string_vector keys;

  static octave_sparse_params *instance;

  static void cleanup_instance (void) { delete instance; instance = nullptr; }

  void do_defaults (void);

  void do_tight (void);

  string_vector do_get_keys (void) const { return keys; }

  ColumnVector do_get_vals (void) const { return params; }

  bool do_set_vals (const NDArray& vals);

  bool do_set_key (const std::string& key, const double& val);

  double do_get_key (const std::string& key);

  double do_get_bandden (void);

  void do_print_info (std::ostream& os, const std::string& prefix) const;

  void init_keys (void);
};

#endif
