#ifndef SIMULATION_H_7BF6EEA4
#define SIMULATION_H_7BF6EEA4

#include "state.h"
#include "entity.h"
#include "schedule.h"
#include <range/v3/all.hpp>
#include <vector>
#include <deque>
#include <set>

class Level;

class Simulation : public State {
public:

  // Constructor
  explicit Simulation(const Level& level);

  void tick(
    double dt,
    const Uint8* keystate) override;

  void render(SDL_Renderer* ren) override;

  id_type emplaceEntity();

  void deleteEntity(id_type id);

  Entity& getEntity(id_type id)
  {
    return entities_.at(id);
  }

  const Entity& getEntity(id_type id) const
  {
    return entities_.at(id);
  }

  const std::set<id_type>& getActive() const
  {
    return active_;
  }

  const Level& getLevel() const
  {
    return level_;
  }

  auto entityView()
  {
    return ranges::view::transform([&] (id_type id) -> Entity& {
      return entities_.at(id);
    });
  }

  auto entityView() const
  {
    return ranges::view::transform([&] (id_type id) -> const Entity& {
      return entities_.at(id);
    });
  }

  auto entityRange()
  {
    return active_ | entityView();
  }

  auto entityRange() const
  {
    return active_ | entityView();
  }

private:




  bool moveEntityOnGrid(
    Entity& entity,
    Direction moveDir,
    bool validate = false);

  const Level& level_;
  Schedule schedule_ { 90 };

  std::vector<Entity> entities_;
  std::deque<id_type> available_;
  std::set<id_type> active_;

  texture_ptr renderedMap_;
};

#endif /* end of include guard: SIMULATION_H_7BF6EEA4 */