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

#include <memory>  // std::unique_ptr

#include <boost/geometry.hpp>

#include "sql/gis/geometries.h"
#include "sql/gis/geometries_traits.h"
#include "sql/gis/union_functor.h"

namespace bg = boost::geometry;

namespace gis {

Union::Union(double semi_major, double semi_minor)
    : m_semi_major(semi_major),
      m_semi_minor(semi_minor),
      m_geographic_pl_pa_strategy(
          bg::srs::spheroid<double>(semi_major, semi_minor)),
      m_geographic_ll_la_aa_strategy(
          bg::srs::spheroid<double>(semi_major, semi_minor)) {}

Geometry *Union::operator()(const Geometry *g1, const Geometry *g2) const {
  return apply(*this, g1, g2);
}

Geometry *Union::eval(const Geometry *g1, const Geometry *g2) const {
  DBUG_ASSERT(false);
  throw not_implemented_exception::for_non_projected(*g1, *g2);
}

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

// union(Cartesian_multilinestring, *)

Geometry *Union::eval(const Cartesian_multilinestring *g1,
                      const Cartesian_linestring *g2) const {
  std::unique_ptr<Cartesian_multilinestring> result(
      new Cartesian_multilinestring());
  bg::union_(*g1, *g2, *result);
  return result.release();
}

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

// union(Cartesian_multipolygon, *)

Geometry *Union::eval(const Cartesian_multipolygon *g1,
                      const Cartesian_polygon *g2) const {
  std::unique_ptr<Cartesian_multipolygon> result(new Cartesian_multipolygon());
  bg::union_(*g1, *g2, *result);
  return result.release();
}

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

// union(Geographic_multilinestring, *)

Geometry *Union::eval(const Geographic_multilinestring *g1,
                      const Geographic_linestring *g2) const {
  std::unique_ptr<Geographic_multilinestring> result(
      new Geographic_multilinestring());
  bg::union_(*g1, *g2, *result, m_geographic_ll_la_aa_strategy);
  return result.release();
}

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

// union(Geographic_multipolygon, *)

Geometry *Union::eval(const Geographic_multipolygon *g1,
                      const Geographic_polygon *g2) const {
  std::unique_ptr<Geographic_multipolygon> result(
      new Geographic_multipolygon());
  bg::union_(*g1, *g2, *result, m_geographic_ll_la_aa_strategy);
  return result.release();
}

}  // namespace gis