// FGAIPlane - abstract base class for an AI plane
//
// Written by David Luff, started 2002.
//
// Copyright (C) 2002  David C. Luff - david.luff@nottingham.ac.uk
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.

/*****************************************************************
*
* WARNING - Curt has some ideas about AI traffic so anything in here
* may get rewritten or scrapped.  Contact Curt curt@flightgear.org 
* before spending any time or effort on this code!!!
*
******************************************************************/

#include <Main/globals.hxx>
#include <Main/fg_props.hxx>
//#include <Scenery/scenery.hxx>
//#include <simgear/constants.h>
#include <simgear/math/point3d.hxx>
//#include <simgear/math/sg_geodesy.hxx>
//#include <simgear/misc/sg_path.hxx>
#include <math.h>
#include <string>
SG_USING_STD(string);


#include "AIPlane.hxx"
#include "ATCdisplay.hxx"

FGAIPlane::~FGAIPlane() {
}

void FGAIPlane::Update(double dt) {
}

void FGAIPlane::Bank(double angle) {
	// This *should* bank us smoothly to any angle
	if(fabs(roll - angle) > 0.6) {
		roll -= ((roll - angle)/fabs(roll - angle));  
	}
}

// Duplication of Bank(0.0) really - should I cut this?
void FGAIPlane::LevelWings(void) {
	// bring the plane back to level smoothly (this should work to come out of either bank)
	if(fabs(roll) > 0.6) {
		roll -= (roll/fabs(roll));
	}
}

void FGAIPlane::Transmit(string msg) {
	double user_freq0 = fgGetDouble("/radios/comm[0]/frequencies/selected-mhz");
	//double user_freq0 = ("/radios/comm[0]/frequencies/selected-mhz");
	//comm1 is not used yet.
	
	if(freq == user_freq0) {
		// we are on the same frequency, so check distance to the user plane
		if(1) {
			// For now (testing) assume in range !!!
			// TODO - implement range checking
			globals->get_ATC_display()->RegisterSingleMessage(msg, 0);
		}
	}
}