var layerXClickEvent = 0;
var layerYClickEvent = 0;
L.TileLayer.BetterWMS = L.TileLayer.WMS.extend({
  
  onAdd: function (map) {
    // Triggered when the layer is added to a map.
    //   Register a click listener, then do all the upstream WMS things
    L.TileLayer.WMS.prototype.onAdd.call(this, map);
    map.on('click', this.getFeatureInfo, this);
  },
  
  onRemove: function (map) {
    // Triggered when the layer is removed from a map.
    //   Unregister a click listener, then do all the upstream WMS things
    L.TileLayer.WMS.prototype.onRemove.call(this, map);
    map.off('click', this.getFeatureInfo, this);
  },
  
  getFeatureInfo: function (evt) {
    layerx = evt.originalEvent.layerX;
    layery = evt.originalEvent.layerY;
    console.log(evt.originalEvent);
    console.log(layerx + " " + layery);
    
    if(layerXClickEvent != layerx || layerYClickEvent != layery) {
      layerXClickEvent = layerx;
      layerYClickEvent = layery;
      console.log("clean");
      $("#feature").html("");
    }

    // Make an AJAX request to the server and hope for the best
    var url = this.getFeatureInfoUrl(evt.latlng),
        showResults = L.Util.bind(this.showGetFeatureInfo, this);
    
    $.ajax({
      url: url,
      datatype: 'application/json',
      success: function (data, status, xhr) {
        var err = typeof data === 'string' ? null : data;
        showResults(err, evt.latlng, data);
      },
      error: function (xhr, status, error) {
        showResults(error);  
      }
    });
    
  },
  
  getFeatureInfoUrl: function (latlng) {
    
    var point = this._map.latLngToContainerPoint(latlng, this._map.getZoom()),
        size = this._map.getSize(),
        params = {
          request: 'GetFeatureInfo',
          service: 'WMS',
          srs: 'EPSG:4326',
          styles: this.wmsParams.styles,
          transparent: this.wmsParams.transparent,
          version: this.wmsParams.version,      
          format: this.wmsParams.format,
          bbox: this._map.getBounds().toBBoxString(),
          height: size.y,
          width: size.x,
          layers: this.wmsParams.layers,
          query_layers: this.wmsParams.layers,
          feature_count: 50,
          info_format: 'application/json'
        };
    
    params[params.version === '1.3.0' ? 'i' : 'x'] = point.x;
    params[params.version === '1.3.0' ? 'j' : 'y'] = point.y;
    
    return this._url + L.Util.getParamString(params, this._url, true);
    //return "{{url('api_feature_json')}}" + L.Util.getParamString(params, this._url, true);
  }, 
  
  showGetFeatureInfo: function (err, latlng, content) {
    customShowFeature(this._map, err, latlng, content);
  }
});

L.tileLayer.betterWms = function (url, options) {
  console.log(url);
  return new L.TileLayer.BetterWMS(url, options);  
};