var kartentyp="Platz"
var startlat=51.78513919625788;
var startlng=6.634454727172852;
var startzoom=15;
var platzname="Erholungsgebiet Dingdener Heide";
document.getElementById('route_ende').value=startlat+","+startlng;
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initMap() {
 if (kartentyp=="Platz") {initMap_Platz();}
}
function initMap_Platz() {
    directionsDisplay = new google.maps.DirectionsRenderer();

    map = new google.maps.Map(document.getElementById('map'), {
          center: {lat: startlat, lng: startlng},
          zoom: startzoom
    });
    directionsDisplay.setMap(map);
    directionsDisplay.setPanel(document.getElementById('directionsPanel'));

    var markerpic = new google.maps.MarkerImage('//maps.gstatic.com/mapfiles/ms2/micons/campground.png',
          new google.maps.Size(32, 32),
          new google.maps.Point(0,0),
          new google.maps.Point(16, 16)
    );
    var marker = new google.maps.Marker({
          position: {lat: startlat, lng: startlng},
          map: map,
          /*icon: markerpic,*/
          title: platzname
    });
}
function calcRoute() {      // route berechnen
  document.getElementById('directionsPanel').innerHTML="Route wird berechnet...";
  var start = document.getElementById('route_start').value;
  var end = document.getElementById('route_ende').value;
  var request = {
    origin:start,
    destination:end,
    travelMode: 'DRIVING'
  };
  directionsService.route(request, function(response, status) {
    if (status == 'OK') {
     document.getElementById('directionsPanel').innerHTML="";
     directionsDisplay.setDirections(response);
    } else {
     document.getElementById('directionsPanel').innerHTML='<center><b>Fehler, die Route konnte nicht berechnet werden.</b><br>Bitte geben Sie "Strasse,Ort" oder "Ort" ein,<br>oder nutzen Sie "GPS".</center>';
    }
  });
}
function userstandort() {    // GPS des User holen
        document.getElementById('directionsPanel').innerHTML="Position wird ermittelt...";
        // Try HTML5 geolocation.
//        alert("1")
	if (navigator.geolocation) {
//	alert("2")
          navigator.geolocation.getCurrentPosition(function(position) {
            //var pos = {lat: position.coords.latitude,lng: position.coords.longitude};
            var pos=position.coords.latitude+","+position.coords.longitude;
//	    alert(pos)
            document.getElementById('route_start').value=pos;
//	    alert("3")
            calcRoute();
            
          }, maperror);
        } else {
          // Browser doesn't support Geolocation
//          alert("5")
	  //handleLocationError(false, infoWindow, map.getCenter());
        }
}
function userstandort_cookie(lat,lon) {
 if (lat!=0 && lon!=0) {
  var pos=lat+","+lon;
  document.getElementById('route_start').value=pos;
  calcRoute();
 } else {
   // alert() 
 }
}
function maperror(err) {
  alert(err.message)
  //console.warn(`ERROR(${err.code}): ${err.message}`);
};
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
 alert(browserHasGeolocation+"\n"+infoWindow+"\n"+pos)
}