#ifndef DECREMENTAL_MAINTENANCE_H_
#define DECREMENTAL_MAINTENANCE_H_

#include "graph/digraph.h"
#include "graph/scc.h"
#include "algorithm/tarjan.h"
#include "algorithm/bfs.h"
#include "algorithm/roditty_zwick.h"

using namespace graph;

namespace algo {

template<typename T>
class DecrementalMaintenance : public RodittyZwick<T> {
public:
  DecrementalMaintenance(Digraph<T> G) : G(G) {}

  //
  void init();

  //
  void query();

  //
  void remove();
private:
  Digraph<T> G;
};

template<typename T>
void DecrementalMaintenance<T>::init() {
  std::map<T, T> A;
  Tarjan<T> tarjan(G);

  auto sccs = tarjan.run();

  for (auto& scc : sccs) {
    const auto& root = scc.representative();
    BFS<T> bfs(scc);
    auto spt = bfs.run(root);
    for (const auto& vertex : scc.vertices) {
      A[vertex] = root;
    }

  }
}

template<typename T>
inline void DecrementalMaintenance<T>::query()
{
}

template<typename T>
inline void DecrementalMaintenance<T>::remove()
{
}

}; // namespace algo

#endif