import L from 'leaflet';
import { getJSON } from '../util';

export var Google = L.Class.extend({
  options: {
    serviceUrl: 'https://maps.googleapis.com/maps/api/geocode/json',
    geocodingQueryParams: {},
    reverseQueryParams: {}
  },

  initialize: function(key, options) {
    this._key = key;
    L.setOptions(this, options);
    // Backwards compatibility
    this.options.serviceUrl = this.options.service_url || this.options.serviceUrl;
  },

  geocode: function(query, cb, context) {
    var params = {
      address: query
    };

    if (this._key && this._key.length) {
      params.key = this._key;
    }

    params = L.Util.extend(params, this.options.geocodingQueryParams);

    getJSON(this.options.serviceUrl, params, function(data) {
      var results = [],
        loc,
        latLng,
        latLngBounds;
      if (data.results && data.results.length) {
        for (var i = 0; i <= data.results.length - 1; i++) {
          loc = data.results[i];
          latLng = L.latLng(loc.geometry.location);
          latLngBounds = L.latLngBounds(
            L.latLng(loc.geometry.viewport.northeast),
            L.latLng(loc.geometry.viewport.southwest)
          );
          results[i] = {
            name: loc.formatted_address,
            bbox: latLngBounds,
            center: latLng,
            properties: loc.address_components
          };
        }
      }

      cb.call(context, results);
    });
  },

  reverse: function(location, scale, cb, context) {
    var params = {
      latlng: encodeURIComponent(location.lat) + ',' + encodeURIComponent(location.lng)
    };
    params = L.Util.extend(params, this.options.reverseQueryParams);
    if (this._key && this._key.length) {
      params.key = this._key;
    }

    getJSON(this.options.serviceUrl, params, function(data) {
      var results = [],
        loc,
        latLng,
        latLngBounds;
      if (data.results && data.results.length) {
        for (var i = 0; i <= data.results.length - 1; i++) {
          loc = data.results[i];
          latLng = L.latLng(loc.geometry.location);
          latLngBounds = L.latLngBounds(
            L.latLng(loc.geometry.viewport.northeast),
            L.latLng(loc.geometry.viewport.southwest)
          );
          results[i] = {
            name: loc.formatted_address,
            bbox: latLngBounds,
            center: latLng,
            properties: loc.address_components
          };
        }
      }

      cb.call(context, results);
    });
  }
});

export function google(key, options) {
  return new Google(key, options);
}