#include "include/Saver.h"
#include <CGAL/Simple_cartesian.h>
#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Shape_regularization/Contours/Multiple_directions_2.h>
#include <CGAL/Shape_regularization/regularize_contours.h>

namespace SR = CGAL::Shape_regularization;

template<class Traits>
void test_directions_multiple_1() {

  using FT          = typename Traits::FT;
  using Point_2     = typename Traits::Point_2;
  using Direction_2 = typename Traits::Direction_2;
  using Contour     = std::vector<Point_2>;
  using Saver       = SR::Tests::Saver<Traits>;

  using MD = SR::Contours::Multiple_directions_2<Traits, Contour>;

  Saver saver;
  const Contour contour = {
    Point_2(0, 0), Point_2(1, 0), Point_2(0, 1)
  };
  assert(contour.size() == 3);

  // saver.export_closed_contour(contour, "dm1_input", 100);

  const bool is_closed = true;
  MD closed_directions(contour,  is_closed);
  MD   open_directions(contour, !is_closed);

  const std::size_t num_closed_directions =
    closed_directions.number_of_directions();
  const std::size_t num_open_directions =
    open_directions.number_of_directions();

  assert(num_closed_directions == 1);
  assert(num_closed_directions == num_open_directions);

  const auto& closed_dirs = closed_directions.get_directions();
  const auto& open_dirs = open_directions.get_directions();

  const auto d = contour[2] - contour[1];
  const auto length = static_cast<FT>(
    CGAL::sqrt(CGAL::to_double(d.x() * d.x() + d.y() * d.y())));
  const Direction_2 ref_direction = Direction_2(d.x() / length, d.y() / length);

  // std::vector<Point_2> regularized;
  // SR::Contours::regularize_closed_contour(
  //   contour, closed_directions, std::back_inserter(regularized),
  //   CGAL::parameters::maximum_offset(2));
  // saver.export_closed_contour(regularized, "dm1_output_cl", 100);

  // regularized.clear();
  // SR::Contours::regularize_open_contour(
  //   contour, open_directions, std::back_inserter(regularized),
  //   CGAL::parameters::maximum_offset(2));
  // saver.export_open_contour(regularized, "dm1_output_op", 100);

  assert(closed_dirs[0] == open_dirs[0]);
  assert(closed_dirs[0] == ref_direction);
}

int main() {
  test_directions_multiple_1< CGAL::Simple_cartesian<double> >();
  test_directions_multiple_1< CGAL::Exact_predicates_inexact_constructions_kernel >();
  test_directions_multiple_1< CGAL::Exact_predicates_exact_constructions_kernel >();
  std::cout << "test_directions_multiple_1: SUCCESS" << std::endl;
  return EXIT_SUCCESS;
}