// road.h

#ifndef _road_h
#define _road_h

#include <string>

class Vehicle; // declare the class so Road can use it

class Road {
public:
    Road(std::string description);
    void advance_one_step();
    bool is_clear() const;
    int steps_to_clear() const;
    // return true if the spot exists and is nullptr or it doesn't exist
    bool spot_is_clear(int index) const;
    void display();
private:
    int length;
    int cur_step;
    Vehicle** spots;      // array of spaces, allocated in constructor
};

class Vehicle {
public:
    Vehicle(Road *road_on) : _can_move{false}, road{road_on} { }
    bool can_move() const { return _can_move; }
    void reset_move_state() { _can_move = false; }
protected:
    bool _can_move;        // is vehicle in a place where it can move?
    Road *road;            // current road vehicle is on
};

// TODO: add car, taxi, eighteenwheeler classes

#endif