// Global geo_maps array and array size
var geo_maps = new Array(); 
var num_maps = 0;
var geo_map; 

function geopress_storezoom(elem) {
  $('geopress_map_zoom').value = geo_map.getZoom();	
}
// Creates a map 
function geopress_makemap(map_id, name, lat, lon, map_format, map_type, map_controls, map_zoom) {
  num_maps = geo_maps.push(new Mapstraction("geo_map" + map_id, map_format)) - 1;
  var myPoint = new LatLonPoint(lat, lon);
  if(map_controls)
  geo_maps[num_maps].addControls(map_controls);
  geo_maps[num_maps].setCenterAndZoom(myPoint, map_zoom);
  geo_maps[num_maps].setMapType(map_type);
  var marker = new Marker(myPoint);
  marker.setInfoBubble(name);
  geo_maps[num_maps].addMarker(marker);
}
function geopress_setmap() {
  geo_map.removeAllMarkers();
  var myPoint = new LatLonPoint(30,-90);
  geo_map.setCenterAndZoom(myPoint, 8);
  var marker = new Marker(myPoint);
  marker.setInfoBubble("@ Pointed");
  geo_map.addMarker(marker);
}

// @todo - make this use a Mapstraction geocoder or geocoder independent
var geocoder = new GClientGeocoder();

// addPointToMap() adds a marker at a specific point from either 
// a geocoder response or the user clicking on the map. 
// @todo handle drawing polylines
function addPointToMap(point) {
  geo_map.removeAllMarkers();
  marker = new Marker(point);
  geo_map.setCenterAndZoom(point,10);
  marker.setInfoBubble(point.toString());
  geo_map.addMarker(marker);
}
function returnObjById( id )
{
  if (document.getElementById)
  var returnVar = document.getElementById(id);
  else if (document.all)
  var returnVar = document.all[id];
  else if (document.layers)
  var returnVar = document.layers[id];
  return returnVar;
}

// addAddressToMap() is called when the geocoder returns an
// answer.  It adds a marker to the map with an open info window
// showing the nicely formatted version of the address and the country code.
function addAddressToMap(response, element) {
  //   map.clearOverlays();
  if(!element)
    element = "geometry";

  if (!response || response.Status.code != 200) {
    alert("Sorry, we were unable to geocode that address");
  } else {
    place = response.Placemark[0];
    point = new LatLonPoint(place.Point.coordinates[1], place.Point.coordinates[0]);
    addPointToMap(point);
    returnObjById(element).value = place.Point.coordinates[1] + ", " + place.Point.coordinates[0];
  }
}

// showLocation() is called when you click on the Search button
// in the form.  It geocodes the address entered into the form
// and adds a marker to the map at that location.
function showLocation(addr, geometry) {

  if(!addr)
    addr = 'addr';
  if(!geometry)
    geometry = 'geometry';

  
  var address = returnObjById(addr).value;
  var geom = returnObjById(geometry).value;
  
  // The geometry element may already have a good location
  if(geom) {
    if(matches = geom.match(/(.+),[ ]+(.+)/)) {
      setMapPoint(new LatLonPoint(matches[1], matches[2]));
      return false;
    }
  }
  if(address) {
    // If the 'address' is just points, map them
    if(matches = address.match(/\[(.+),[ ]?(.+)\]/)) {
      setMapPoint(new LatLonPoint(matches[1], matches[2]));
    } else {
      geocoder.getLocations(address, function(response) { addAddressToMap(response, geometry)});
    }
  }
}

function geocode(element, geometry) {

  if(element == null)
    element = 'addr';

  //	document.forms[0].locname.value = "";
  // returnObjById('locname').value = "";
  returnObjById('geometry').value = "";

  showLocation(element, geometry);    
}
// findLocation() is used to enter the sample addresses into the form.
function findLocation(address) {
  //document.forms[0].addr	
  returnObjById('addr').value = address;
  showLocation();
}
var gPoint;
// setMapPoint() handles a user clicking on a map
function setMapPoint(point) {
  //document.forms[0].addr	
  geo_map.removeAllMarkers();
  addPointToMap(point);
}
function setClickPoint(point) {
  returnObjById('geometry').value = "";  
  returnObjById('addr').value = "[" + point + "]";
  return setMapPoint(point);
}
function geopress_resetMap() {
  geo_map.setCenterAndZoom(new LatLonPoint(0,0),1);
}

// used to register onload events to the body 
function geopress_addEvent(obj, evType, fn){ 
  if (obj.addEventListener){ 
    obj.addEventListener(evType, fn, false); 
    return true; 
  } else if (obj.attachEvent){ 
    var r = obj.attachEvent("on"+evType, fn); 
    return r; 
  } else { 
    return false; 
  } 
}

// Handles loading a saved address
function geopress_loadsaved(oSel) { 

  var addr = oSel.options[oSel.selectedIndex].value;
  var name = oSel.options[oSel.selectedIndex].text;
  // Remove previous geocoding
  document.getElementById("geometry").value = "";
  addrobj = document.getElementById("addr");
  locnameobj = document.getElementById("locname");
  addrobj.value = addr;
  locnameobj.value = name;

  oSel.selectedIndex = 0;
}
function checkEnter(e,elem){ //e is event object passed from function invocation
  var characterCode;// literal character code will be stored in this variable

  if(e && e.which){ //if which property of event object is supported (NN4)
    e = e
    characterCode = e.which //character code is contained in NN4s which property
  }
  else{
    e = event
    characterCode = e.keyCode //character code is contained in IEs keyCode property
  }

  if(characterCode == 13){ //if generated character code is equal to ascii 13 (if enter key)
    geocode();				
    return false
  }
  else{
    return true
  }
}

//
// Map Configuration Functions
//
// Handles changing the map controls
function geopress_change_controls(oSel) { 

  var map_controls_pan = document.getElementById("map_controls_pan").checked;
  var map_controls_zoom = document.getElementById("map_controls_zoom").value;
  var map_controls_overview = document.getElementById("map_controls_overview").checked;
  var map_controls_map_type = document.getElementById("map_controls_map_type").checked;
  var map_controls_scale = document.getElementById("map_controls_scale").checked;
  geo_map.addControls({
    pan:      map_controls_pan,
    zoom:     map_controls_zoom,
    overview: map_controls_overview,
    scale:    map_controls_scale,
    map_type: map_controls_map_type
  });
}
// Handles changing the map format
function geopress_change_map_format() { 

  var map_format = document.getElementById("map_format").value;
  geo_map.swap(map_format);
}
// Handles changing the map view type (street, satellite, hybrid)
function geopress_change_view() { 

  var type_string = document.getElementById("map_view_type").value;
  var type;
  switch(type_string) {
    case "satellite":
    type = Mapstraction.SATELLITE;
    break;
    case "road":
    type = Mapstraction.ROAD;
    break;
    case "hybrid":
    type = Mapstraction.HYBRID;
    break;
    default :
    type = Mapstraction.HYBRID;
    break;
  }
  geo_map.setMapType(type);

}
// Handles changing the map default zoom level
function geopress_change_zoom() { 

  var zoom_level = document.getElementById("default_zoom_level").value;
  geo_map.setZoom(zoom_level);

}