#ifndef FLATPATTTERNTOPOLOGY_HPP
#define FLATPATTTERNTOPOLOGY_HPP
#include <boost/graph/adjacency_list.hpp>
#include <unordered_map>
#include <unordered_set>
#include <vcg/space/point2.h>
#include <vector>

using BoostGraph =
    boost::adjacency_list<boost::hash_setS, boost::vecS, boost::undirectedS>;
using vertex_t = boost::graph_traits<BoostGraph>::vertex_descriptor;

class FlatPatternTopology {

public:
  bool containsArticulationPoints() const;
  FlatPatternTopology(const std::vector<size_t> &numberOfNodesPerSlot,
                      const std::vector<vcg::Point2i> &edges);
  static void
  constructNodeToSlotMap(const std::vector<size_t> &numberOfNodesPerSlot,
                         std::unordered_map<size_t, size_t> &nodeToSlot);
  static void constructSlotToNodeMap(
      const std::unordered_map<size_t, size_t> &nodeToSlot,
      std::unordered_map<size_t, std::unordered_set<size_t>> &slotToNode);

  FlatPatternTopology();

private:
  BoostGraph pattern;
  std::vector<size_t> numberOfNodesPerSlot;
  std::unordered_map<size_t, size_t> nodeToSlot;
  std::unordered_map<size_t, std::unordered_set<size_t>> slotToNode;
  std::unordered_map<size_t, size_t> correspondingNode;
  void constructCorresponginNodeMap();
  /*
   * Creates a pattern which is a copy of the input pattern but with added edges
   * that result
   * */
  void printGraph(const BoostGraph &g) const;
  static BoostGraph constructRotationallySymmetricPattern(
      const BoostGraph &pattern,
      const std::unordered_map<size_t, std::unordered_set<size_t>> &slotToNodes,
      const std::unordered_map<size_t, size_t> &nodeToSlot,
      const std::unordered_map<size_t, size_t> &correspondingNode);
  void constructNodeToSlotMap();
  void constructSlotToNodeMap();
};

#endif // FLATPATTTERNTOPOLOGY_HPP