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

#include <memory>  // std::unique_ptr

#include "sql/gis/setops.h"
#include "sql/gis/union_functor.h"
#include "sql/sql_exception_handler.h"  // handle_gis_exception

namespace gis {

bool union_(const dd::Spatial_reference_system *srs, const Geometry *g1,
            const Geometry *g2, const char *func_name,
            std::unique_ptr<Geometry> *result, bool *result_null) noexcept {
  try {
    assert(g1 && g2 && g1->coordinate_system() == g2->coordinate_system());
    assert(((srs == nullptr || srs->is_cartesian()) &&
            g1->coordinate_system() == Coordinate_system::kCartesian) ||
           (srs && srs->is_geographic() &&
            g1->coordinate_system() == Coordinate_system::kGeographic));

    Union const union_func(srs ? srs->semi_major_axis() : 0.0,
                           srs ? srs->semi_minor_axis() : 0.0);
    *result = union_func(g1, g2);

    if ((*result)->type() != Geometry_type::kGeometrycollection &&
        (*result)->is_empty()) {
      *result_null = true;
      result->reset();
    }
  } catch (...) {
    handle_gis_exception(func_name);
    return true;
  }
  return false;
}

}  // namespace gis
