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#ifndef _FSM_H_
#define _FSM_H_
#include <map>
#include <memory>
#include "IBehaviouralState.hpp"
/// <summary>
///
/// </summary>
/// <typeparam name="TState">IBehaviouralState is the only accepted
/// class.</typeparam>
template <class TState> class FSM {
public:
template <class... TPState> FSM(TPState &...args) {
int i = 0;
((void)_states.emplace(i++, args), ...);
}
/// <summary>
/// Implement with FSM::act()
/// </summary>
void act();
/// <summary>
/// Used to check current state.
/// </summary>
/// <returns>Current state.</returns>
std::shared_ptr<TState> &get_state() { return _currentState; }
/// <summary>
/// Used to get all states.
/// </summary>
/// <returns>Current states.</returns>
std::map<int, std::shared_ptr<TState>> get_states();
/// <summary>
/// Sets current state, calls appropiate functions.
/// </summary>
/// <param name="">State to transition into.</param>
void set_state(std::shared_ptr<TState>);
private:
std::map<int, std::shared_ptr<TState>> _states;
std::shared_ptr<TState> _currentState;
};
#endif // _FSM_H_
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