/* -*- Mode: C++ -*- *****************************************************
 * Schedule.hxx
 * Written by Durk Talsma. Started May 5, 2004
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *
 **************************************************************************/

/**************************************************************************
 * This file contains the definition of the class Schedule.
 *
 * A schedule is basically a number of scheduled flights, which can be
 * assigned to an AI aircraft.
 **************************************************************************/

#ifndef _FGSCHEDULE_HXX_
#define _FGSCHEDULE_HXX_

#define TRAFFICTOAIDISTTOSTART 150.0
#define TRAFFICTOAIDISTTODIE   200.0

// forward decls
class FGAIAircraft;
class FGScheduledFlight;

typedef std::vector<FGScheduledFlight*> FGScheduledFlightVec;

class FGAISchedule
{
 private:
  std::string modelPath;
  std::string homePort;
  std::string livery;
  std::string registration;
  std::string airline;
  std::string acType;
  std::string m_class;
  std::string flightType;
  std::string flightIdentifier;
  std::string currentDestination;
  bool heavy;
  FGScheduledFlightVec flights;
  SGGeod position;
  double radius;
  double groundOffset;
  double distanceToUser;
  double score;
  unsigned int runCount;
  unsigned int hits;
  unsigned int lastRun;
  bool firstRun;
  double courseToDest;
  bool initialized;
  bool valid;
  bool scheduleComplete;

  bool scheduleFlights(time_t now);
  int groundTimeFromRadius();

  /**
   * Transition this schedule from distant mode to AI mode;
   * create the AIAircraft (and flight plan) and register with the AIManager
   */
  bool createAIAircraft(FGScheduledFlight* flight, double speedKnots, time_t deptime, time_t remainingTime);

  // the aiAircraft associated with us
  SGSharedPtr<FGAIAircraft> aiAircraft;
 public:
  FGAISchedule();                                           // constructor
  FGAISchedule(const std::string& model,
               const std::string& livery,
               const std::string& homePort,
               const std::string& registration,
               const std::string& flightId,
               bool   heavy,
               const std::string& acType,
               const std::string& airline,
               const std::string& m_class,
               const std::string& flight_type,
               double radius,
               double offset);                              // construct & init
  FGAISchedule(const FGAISchedule &other);                  // copy constructor



  ~FGAISchedule(); //destructor

    static bool validModelPath(const std::string& model);
    static SGPath resolveModelPath(const std::string& model);

  bool update(time_t now, const SGVec3d& userCart);
  bool init();

  double getSpeed         ();
  //void setClosestDistanceToUser();
  bool next();   // forces the schedule to move on to the next flight.

  // TODO: rework these four functions
  time_t      getDepartureTime    ();
  FGAirport * getDepartureAirport ();
  FGAirport * getArrivalAirport   ();
  int         getCruiseAlt        ();
  double      getRadius           () { return radius; };
  double      getGroundOffset     () { return groundOffset;};
  const std::string& getFlightType     () { return flightType;};
  const std::string& getAirline        () { return airline; };
  const std::string& getAircraft       () { return acType; };
  std::string getCallSign       ();
  const std::string& getRegistration   () { return registration;};
  std::string getFlightRules    ();
  bool getHeavy                   () { return heavy; };
  double getCourse                () { return courseToDest; };
  unsigned int getRunCount        () { return runCount; };
  unsigned int getHits            () { return hits; };

  void         setrunCount(unsigned int count) { runCount = count; };
  void         setHits    (unsigned int count) { hits     = count; };
  void         setScore   ();
  double       getScore   () { return score; };
  /**Create an initial heading for user controlled aircraft.*/
  void         setHeading ();
  void         assign         (FGScheduledFlight *ref);
  void         clearAllFlights();
  void         setFlightType  (const std::string& val) { flightType = val; };
  FGScheduledFlight*findAvailableFlight (const std::string& currentDestination, const std::string &req, time_t min=0, time_t max=0);
  // used to sort in descending order of score: I've probably found a better way to
  // descending order sorting, but still need to test that.
  bool operator< (const FGAISchedule &other) const;
  int getLastUsed() { return lastRun; };
  void setLastUsed(unsigned int val) {lastRun = val; };
  //void * getAiRef                 () { return AIManagerRef; };
  //FGAISchedule* getAddress        () { return this;};

};

typedef std::vector<FGAISchedule*>           ScheduleVector;
typedef std::vector<FGAISchedule*>::iterator ScheduleVectorIterator;

bool compareSchedules(FGAISchedule*a, FGAISchedule*b);

#endif