#include "dinkyecs.hpp"
#include <unordered_map>

// BUG: this should have a bool for "permanent" or "constant" so that
// everything working with it knows to do the make_constant/not_constant
// dance when using it.  Idea is the System:: ops for this would get it
// and then look at the bool and add the constant ops as needed.
namespace inventory {
  using Slot = std::string;

  struct Model {
    std::unordered_map<Slot, DinkyECS::Entity> by_slot;
    std::unordered_map<DinkyECS::Entity, Slot> by_entity;

    bool add(const Slot &in_slot, DinkyECS::Entity ent);
    Slot& get(DinkyECS::Entity ent);
    DinkyECS::Entity get(const Slot& slot);
    bool has(DinkyECS::Entity ent);
    bool has(const Slot& slot);
    void remove(const Slot& slot, DinkyECS::Entity ent);
    void remove(DinkyECS::Entity ent);
    void remove(const Slot& slot);
    void invariant();
    void dump();
  };
}