////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1998-2022 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 "Array-fwd.h"
#include "str-vec.h"
#include "dColVector.h"

#define OCTAVE_SPARSE_CONTROLS_SIZE 13

OCTAVE_BEGIN_NAMESPACE(octave)

  class OCTAVE_API sparse_params
  {
  protected:

    sparse_params (void)
      : m_params (OCTAVE_SPARSE_CONTROLS_SIZE),
        m_keys (OCTAVE_SPARSE_CONTROLS_SIZE)
    {
      init_keys ();
      do_defaults ();
    }

  public:

    sparse_params (const sparse_params&) = default;

    sparse_params& operator = (const sparse_params&) = default;

    ~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 Array<double>& 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 m_params;

    string_vector m_keys;

    static sparse_params *s_instance;

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

    void do_defaults (void);

    void do_tight (void);

    string_vector do_get_keys (void) const { return m_keys; }

    ColumnVector do_get_vals (void) const { return m_params; }

    bool do_set_vals (const Array<double>& 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);
  };

OCTAVE_END_NAMESPACE(octave)

#endif