// GPS
//
// Douglas Thrift
//
// $Id$

#ifndef _GPS_hpp_
#define _GPS_hpp_

#include <cmath>
#include <string>

#include <truck.hpp>

#include <gps.h>

namespace GPS
{

class Error : public std::exception
{
	std::string message;
public:
	Error();
	virtual ~Error() throw() {}
	virtual const char *what() const throw() { return message.c_str(); }
};

class GPS
{
	gps_data_t *gps;
public:
	GPS(const std::string &host = _B("localhost"), const std::string &port = _B(DEFAULT_GPSD_PORT));
	~GPS() { ::gps_close(gps); }
	void Poll();
	void Query(const std::string &query);
	double GetLatitude() { return gps->fix.latitude; }
	double GetLongitude() { return gps->fix.longitude; }
	double GetAltitude() { return gps->fix.altitude; }
	double GetAltitudeFeet() { return GetAltitude() * METERS_TO_FEET; }
	double GetTrack() { return gps->fix.track; }
	double GetSpeed() { return gps->fix.speed; }
	double GetSpeedMPH() { return GetSpeed() * MPS_TO_MPH; }
	double GetSpeedKMH() { return GetSpeed() * MPS_TO_KPH; }
	double GetSpeedKnots() { return GetSpeed() * MPS_TO_KNOTS; }
	double GetClimb() { return gps->fix.climb; }
};

}

#endif//_GPS_hpp_