#ifndef   _RUNWAY_H_
#define   _RUNWAY_H_

#include  "Extended_queue.h"
#include  "Plane.h"
#include <iostream>
using namespace std;

enum Runway_activity {idle, land, fly};

class Runway {
public:
   Runway(int limit);
   Error_code can_land(const Plane &current);
   Error_code can_depart(const Plane &current);
   Runway_activity canland(int time, Plane &moving);
   Runway_activity canfly(int time, Plane &moving);
   void shut_down(int time) const;

private:
   Extended_queue landing;
   Extended_queue takeoff;
   int queue_limit;
   int num_land_requests;        //  number of planes asking to land
   int num_takeoff_requests;     //  number of planes asking to take off
   int num_landings;             //  number of planes that have landed
   int num_takeoffs;             //  number of planes that have taken off
   int num_land_accepted;        //  number of planes queued to land
   int num_takeoff_accepted;     //  number of planes queued to take off
   int num_land_refused;         //  number of landing planes refused
   int num_takeoff_refused;      //  number of departing planes refused
   int land_wait;                //  total time of planes waiting to land
   int takeoff_wait;             //  total time of planes waiting to take off
   int idle_time;                //  total time runway is idle
};

#endif