goog.require('ol.Map');
goog.require('ol.View');
goog.require('ol.layer.Tile');
goog.require('ol.source.BingMaps');


var styles = [
  'Road',
  'Aerial',
  'AerialWithLabels',
  'collinsBart',
  'ordnanceSurvey'
];
var layers = [];
var i, ii;
for (i = 0, ii = styles.length; i < ii; ++i) {
  layers.push(new ol.layer.Tile({
    visible: false,
    preload: Infinity,
    source: new ol.source.BingMaps({
      key: 'Ak-dzM4wZjSqTlzveKz5u0d4IQ4bRzVI309GxmkgSVr1ewS6iPSrOvOKhA-CJlm3',
      imagerySet: styles[i]
      // use maxZoom 19 to see stretched tiles instead of the BingMaps
      // "no photos at this zoom level" tiles
      // maxZoom: 19
    })
  }));
}
var map = new ol.Map({
  layers: layers,
  renderer: exampleNS.getRendererFromQueryString(),
  // Improve user experience by loading tiles while dragging/zooming. Will make
  // zooming choppy on mobile or slow devices.
  loadTilesWhileInteracting: true,
  target: 'map',
  view: new ol.View({
    center: [-6655.5402445057125, 6709968.258934638],
    zoom: 13
  })
});

$('#layer-select').change(function() {
  var style = $(this).find(':selected').val();
  var i, ii;
  for (i = 0, ii = layers.length; i < ii; ++i) {
    layers[i].setVisible(styles[i] == style);
  }
});
$('#layer-select').trigger('change');