# See: http://wiki.flightgear.org/MapStructure
# TODO: this layer doesn't make sense to support for AI/MP traffic, because we don't currently have access to flightplan/routing info
# that also applies to other layers like WPT or even navaid layers that handle station tuning based on local radio settings
#
# Class things:
var name = 'RTE';
var parents = [SymbolLayer.Controller];
var __self__ = caller(0)[0];
SymbolLayer.Controller.add(name, __self__);
SymbolLayer.add(name, {
	parents: [MultiSymbolLayer],
	type: name, # Symbol type
	df_controller: __self__, # controller to use by default -- this one
	df_options: { # default configuration options
		active_node: "/FMGC/flightplan[2]/active",
		current_wp_node: "/FMGC/flightplan[2]/current-wp",
		wp_num: "/FMGC/flightplan[2]/num",
		display_inactive_rte: 0
	}
});
var new = func(layer) {
	var m = {
		parents: [__self__],
		layer: layer,
		map: layer.map,
		listeners: [],
	};
	layer.searcher._equals = func(l,r) 0; # TODO: create model objects instead?
	append(m.listeners, setlistener(layer.options.active_node, func m.layer.update() ), setlistener(layer.options.wp_num, func m.layer.update() ));
	m.addVisibilityListener();
	var driver = opt_member(m.layer.options, 'route_driver');
	if(driver == nil){
		driver = A3XXRouteDriver.new();
	}
	var driver_listeners = driver.getListeners();
	foreach(var listener; driver_listeners){
		append(m.listeners, setlistener(listener, func m.layer.update()));
	}
	m.route_driver = driver;
	return m;
};
var del = func() {
	foreach (var l; me.listeners)
		removelistener(l);
};

var last_result = [];

var searchCmd = func {
	# FIXME: do we return the active route even if it isn't active?
	logprint(_MP_dbg_lvl, "Running query: ", name);
	var plans = [];
	var driver = me.route_driver;
	if(!driver.shouldUpdate()) return me.last_result;
	driver.update();
	# http://wiki.flightgear.org/Nasal_Flightplan
	var planCount = driver.getNumberOfFlightPlans();
	for(var idx = 0; idx < planCount; idx += 1){
		#var fp = driver.getFlightPlan(idx);
		var fpSize = driver.getPlanSize(idx);
		if(fpSize < 2) continue;
		var type = driver.getFlightPlanType(idx);
		if(type == nil) type = 'active';
		if (!getprop(me.layer.options.active_node) and 
			type == 'active' and 
			!me.layer.options.display_inactive_rte) fpSize = 0;
		var coords = [];
		var discontinuity = 0;
		for (var i=0; i<fpSize; i += 1) {
			var leg = driver.getWP(idx, i);
			if(leg == nil) continue;
			var path = nil;
			if(discontinuity)
				path = [{},{lon:leg.wp_lon, lat:leg.wp_lat}];
			else
				path = leg.path();
#			if(i == (fpSize - 1) and !discontinuity){# WORKAROUND FOR FG BUG -- we don't need it anymore (I think)!
#				var ltype = leg.wp_type;
#				var path_l = size(path);
#				if(ltype != 'runway' and path_l >= 2)
#					path = subvec(path, 0, 1) ~ subvec(path, path_l - 1, 1);
#			}
			coords ~= path;
			discontinuity = driver.hasDiscontinuity(idx, leg);
		}
		append(plans, {
			id: type,
			#name: type,
			type: type,
			path: coords,
			#size: fpSize,
			equals: func(o){
				me.id == o.id# and me.size == o.size
			}
		});
	}
	me.last_result = plans;
	return plans;
};