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/**
 * @file rc_loss_alarm.h
 * Tone alarm in the event of RC loss
 *
 */

#pragma once

#include <uORB/Subscription.hpp>
#include <uORB/topics/vehicle_status.h>

namespace events
{
namespace rc_loss
{

class RC_Loss_Alarm
{
public:

	RC_Loss_Alarm() = default;

	/** regularily called to handle state updates */
	void process();

private:
	/** Publish tune control to sound alarm */
	void play_tune();

	/** Publish tune control to interrupt any sound */
	void stop_tune();

	uORB::Subscription _vehicle_status_sub{ORB_ID(vehicle_status)};

	bool 		_was_armed = false;
	bool 		_had_rc = false;  // Don't trigger alarm for systems without RC
	bool		_alarm_playing = false;
	orb_advert_t 	_tune_control_pub = nullptr;
};

} /* namespace rc_loss */
} /* namespace events */
