// OSRM car engine
// *** need to clear hints at some point

OSRMEngine = function(vehicleName, baseURL, locale) {
    this.vehicleName = vehicleName;
    this.baseURL = baseURL;
    this.locale = locale;
    if (!locale)
        this.locale = "en";
};

OSRMEngine.prototype.createConfig = function() {
    var that = this;
    return {
		name: "javascripts.directions.engines.osrm_"+this.vehicleName.toLowerCase(),
		creditline: 'Directions courtesy of <a href="http://project-osrm.org/" target="_blank">OSRM</a>',
		draggable: true,
		_hints: {},
		getRoute: function(isFinal,points) {
			var url=that.baseURL+"?z=14&output=json";
			for (var i=0; i<points.length; i++) {
				var pair=points[i].join(',');
				url+="&loc="+pair;
				if (this._hints[pair]) url+= "&hint="+this._hints[pair];
			}
			if (isFinal) url+="&instructions=true";
			this.requestCORS(url);
		},
		gotRoute: function(router,data) {
			if (data.status==207) {
				return false;
			}
			// Draw polyline
			var line=L.PolylineUtil.decode(data.route_geometry);
			for (i=0; i<line.length; i++) { line[i].lat/=10; line[i].lng/=10; }
			router.setPolyline(line);
			// *** store hints
			// Assemble instructions
			var steps=[];
			for (i=0; i<data.route_instructions.length; i++) {
				var s=data.route_instructions[i];
				var instCodes=s[0].split('-');
				var instText="<b>"+(i+1)+".</b> ";
				instText+=TURN_INSTRUCTIONS[instCodes[0]];
				if (instCodes[1]) { instText+="exit "+instCodes[1]+" "; }
				if (instCodes[0]!=15) { instText+=s[1] ? "<b>"+s[1]+"</b>" : I18n.t('javascripts.directions.instructions.unnamed'); }
				steps.push([line[s[3]], s[0].split('-')[0], instText, s[2]]);
			}
			if (steps.length) router.setItinerary({ steps: steps });
			return true;
		}
	};
};

OSM.RoutingEngines.list.push(new OSRMEngine("Car", "http://router.project-osrm.org/viaroute").createConfig());