#pragma once

#include "../indexer/feature_decl.hpp"
#include "../base/mutex.hpp"

#include "../std/set.hpp"
#include "../std/utility.hpp"
#include "../std/vector.hpp"
#include "../std/noncopyable.hpp"

namespace df
{

struct FeatureInfo
{
  FeatureInfo(FeatureID const & id)
    : m_id(id), m_isOwner(false) {}

  bool operator < (FeatureInfo const & other) const
  {
    if (m_id != other.m_id)
      return m_id < other.m_id;

    return m_isOwner < other.m_isOwner;
  }

  FeatureID m_id;
  bool m_isOwner;
};

class MemoryFeatureIndex : private noncopyable
{
public:
  void ReadFeaturesRequest(vector<FeatureInfo> & features, vector<size_t> & indexes);
  void RemoveFeatures(vector<FeatureInfo> & features);

private:
  threads::Mutex m_mutex;
  set<FeatureID> m_features;
};

} // namespace df