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 *   Copyright (c) 2013-2014 PX4 Development Team. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer in
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 *    distribution.
 * 3. Neither the name PX4 nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
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/**
 * @file gpsfailure.h
 * Helper class for Data Link Loss Mode according to the OBC rules
 *
 * @author Thomas Gubler <thomasgubler@gmail.com>
 */

#pragma once

#include <px4_module_params.h>

#include "mission_block.h"

class Navigator;

class GpsFailure : public MissionBlock, public ModuleParams
{
public:
	GpsFailure(Navigator *navigator);
	~GpsFailure() = default;

	void on_inactive() override;
	void on_activation() override;
	void on_active() override;

private:
	DEFINE_PARAMETERS(
		(ParamFloat<px4::params::NAV_GPSF_LT>) _param_loitertime,
		(ParamFloat<px4::params::NAV_GPSF_R>) _param_openlooploiter_roll,
		(ParamFloat<px4::params::NAV_GPSF_P>) _param_openlooploiter_pitch,
		(ParamFloat<px4::params::NAV_GPSF_TR>) _param_openlooploiter_thrust
	)

	enum GPSFState {
		GPSF_STATE_NONE = 0,
		GPSF_STATE_LOITER = 1,
		GPSF_STATE_TERMINATE = 2,
		GPSF_STATE_END = 3,
	} _gpsf_state{GPSF_STATE_NONE};

	hrt_abstime _timestamp_activation{0}; //*< timestamp when this mode was activated */

	orb_advert_t	_att_sp_pub{nullptr};

	/**
	 * Set the GPSF item
	 */
	void		set_gpsf_item();

	/**
	 * Move to next GPSF item
	 */
	void		advance_gpsf();

};
