// Copyright (c) 2017, 2021, Oracle and/or its affiliates.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 2.0,
// as published by the Free Software Foundation.
//
// This program is also distributed with certain software (including
// but not limited to OpenSSL) that is licensed under separate terms,
// as designated in a particular file or component or in included license
// documentation.  The authors of MySQL hereby grant you an additional
// permission to link the program and your derivative works with the
// separately licensed software that they have included with MySQL.
//
// This program 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, version 2.0, for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA.

/// @file
///
/// This file implements the length functor and function.

#include <cmath>  // std::isfinite

#include <boost/geometry.hpp>
#include "my_inttypes.h"                            // MYF
#include "my_sys.h"                                 // my_error
#include "mysqld_error.h"                           // Error codes
#include "sql/dd/types/spatial_reference_system.h"  // dd::Spatial_reference_system
#include "sql/gis/geometries.h"
#include "sql/gis/geometries_traits.h"
#include "sql/gis/length.h"
#include "sql/gis/length_functor.h"
#include "sql/sql_exception_handler.h"  // handle_gis_exception

namespace bg = boost::geometry;
namespace bgs = boost::geometry::srs;
namespace bgsd = boost::geometry::strategy::distance;

namespace gis {
Length::Length(double major, double minor)
    : m_geographic_strategy(new bgsd::andoyer<bgs::spheroid<double>>(
          bgs::spheroid<double>(major, minor))) {}

double Length::operator()(const Geometry &g1) const { return apply(*this, g1); }

double Length::eval(const Geometry &) const {
  assert(false); /* purecov: inspected */
  throw std::exception();
}

double Length::eval(const Geographic_linestring &g1) const {
  return bg::length(g1, *m_geographic_strategy);
}

double Length::eval(const Cartesian_linestring &g1) const {
  return bg::length(g1);
}

/////////////////////////////////////////////////////////////////////////////

double Length::eval(const Geographic_multilinestring &g1) const {
  return bg::length(g1, *m_geographic_strategy);
}

double Length::eval(const Cartesian_multilinestring &g1) const {
  return bg::length(g1);
}
/////////////////////////////////////////////////////////////////////////////

bool length(const dd::Spatial_reference_system *srs, const Geometry *g1,
            double *length, bool *null) noexcept {
  try {
    assert(srs == nullptr ||
           ((srs->is_cartesian() &&
             g1->coordinate_system() == Coordinate_system::kCartesian) ||
            (srs->is_geographic() &&
             g1->coordinate_system() == Coordinate_system::kGeographic)));

    if ((*null = (g1->is_empty()))) return false;

    if ((g1->type() != Geometry_type::kLinestring) &&
        (g1->type() != Geometry_type::kMultilinestring)) {
      *null = true;
      return false;
    }

    Length len(srs ? srs->semi_major_axis() : 0.0,
               srs ? srs->semi_minor_axis() : 0.0);
    *length = len(*g1);
  } catch (...) {
    handle_gis_exception("st_length");
    return true;
  }

  if (!std::isfinite(*length) || *length < 0.0) {
    my_error(ER_DATA_OUT_OF_RANGE, MYF(0), "Length", "st_length");
    return true;
  }

  return false;
}

}  // namespace gis
