#ifndef SGP4PROPAGATOR_H_
#define SGP4PROPAGATOR_H_

#include <sys/time.h>
#include <contrib/sgp4/sgp4unit.h>
#include <framework/returnvalues/HasReturnvaluesIF.h>

class Sgp4Propagator {
public:
	static const uint8_t INTERFACE_ID = CLASS_ID::SGP4PROPAGATOR_CLASS;
	static const ReturnValue_t INVALID_ECCENTRICITY = MAKE_RETURN_CODE(0xA1);
	static const ReturnValue_t INVALID_MEAN_MOTION = MAKE_RETURN_CODE(0xA2);
	static const ReturnValue_t INVALID_PERTURBATION_ELEMENTS = MAKE_RETURN_CODE(0xA3);
	static const ReturnValue_t INVALID_SEMI_LATUS_RECTUM = MAKE_RETURN_CODE(0xA4);
	static const ReturnValue_t INVALID_EPOCH_ELEMENTS = MAKE_RETURN_CODE(0xA5);
	static const ReturnValue_t SATELLITE_HAS_DECAYED = MAKE_RETURN_CODE(0xA6);
	static const ReturnValue_t TLE_TOO_OLD = MAKE_RETURN_CODE(0xB1);
	static const ReturnValue_t TLE_NOT_INITIALIZED = MAKE_RETURN_CODE(0xB2);



	Sgp4Propagator();
	virtual ~Sgp4Propagator();

	ReturnValue_t initialize(const uint8_t *line1, const uint8_t *line2);

	/**
	 *
	 * @param[out] position in ECF
	 * @param[out] velocity in ECF
	 * @param time to which to propagate
	 * @return
	 */
	ReturnValue_t propagate(double *position, double *velocity, timeval time, uint8_t gpsUtcOffset);

private:
	bool initialized;
	timeval epoch;
	elsetrec satrec;
	gravconsttype whichconst;

};

#endif /* SGP4PROPAGATOR_H_ */