text: // Copyright (c) 2015 Uber Technologies, Inc.
  
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  import {PureComponent, createElement} from 'react';
  import PropTypes from 'prop-types';
  import autobind from '../utils/autobind';
  
  import {getAccessToken} from '../utils/access-token';
  import {getInteractiveLayerIds} from '../utils/style-utils';
  import diffStyles from '../utils/diff-styles';
  
  import Immutable from 'immutable';
  
  import isBrowser from '../utils/is-browser';
  import {PerspectiveMercatorViewport} from 'viewport-mercator-project';
  
  let mapboxgl = null;
  if (isBrowser) {
    mapboxgl = require('mapbox-gl');
  }
  
  function noop() {}
  
  const propTypes = {
    /** Mapbox API access token for mapbox-gl-js. Required when using Mapbox vector tiles/styles. */
    mapboxApiAccessToken: PropTypes.string,
    /** Mapbox WebGL context creation option. Useful when you want to export the canvas as a PNG. */
    preserveDrawingBuffer: PropTypes.bool,
    /** Show attribution control or not. */
    attributionControl: PropTypes.bool,
  
    /** The Mapbox style. A string url or a MapboxGL style Immutable.Map object. */
    mapStyle: PropTypes.oneOfType([
      PropTypes.string,
      PropTypes.instanceOf(Immutable.Map)
    ]),
    /** There are known issues with style diffing. As stopgap, add option to prevent style diffing. */
    preventStyleDiffing: PropTypes.bool,
    /** Whether the map is visible */
    visible: PropTypes.bool,
  
    /** The width of the map. */
    width: PropTypes.number.isRequired,
    /** The height of the map. */
    height: PropTypes.number.isRequired,
    /** The longitude of the center of the map. */
    longitude: PropTypes.number.isRequired,
    /** The latitude of the center of the map. */
    latitude: PropTypes.number.isRequired,
    /** The tile zoom level of the map. */
    zoom: PropTypes.number.isRequired,
    /** Specify the bearing of the viewport */
    bearing: PropTypes.number,
    /** Specify the pitch of the viewport */
    pitch: PropTypes.number,
    /** Altitude of the viewport camera. Default 1.5 "screen heights" */
    // Note: Non-public API, see https://github.com/mapbox/mapbox-gl-js/issues/1137
    altitude: PropTypes.number,
    /** The onLoad callback for the map */
    onLoad: PropTypes.func
  };
  
  const defaultProps = {
    mapStyle: 'mapbox://styles/mapbox/light-v8',
    mapboxApiAccessToken: getAccessToken(),
    preserveDrawingBuffer: false,
    attributionControl: true,
    preventStyleDiffing: false,
    visible: true,
    bearing: 0,
    pitch: 0,
    altitude: 1.5,
    onLoad: noop
  };
  
  const childContextTypes = {
    viewport: PropTypes.instanceOf(PerspectiveMercatorViewport)
  };
  
  export default class StaticMap extends PureComponent {
    static supported() {
      return mapboxgl && mapboxgl.supported();
    }
  
    constructor(props) {
      super(props);
  
      this._queryParams = {};
      if (mapboxgl) {
        mapboxgl.accessToken = props.mapboxApiAccessToken;
      }
  
      if (!StaticMap.supported()) {
        this.componentDidMount = noop;
        this.componentWillReceiveProps = noop;
        this.componentDidUpdate = noop;
      }
      autobind(this);
    }
  
    getChildContext() {
      return {
        viewport: new PerspectiveMercatorViewport(this.props)
      };
    }
  
    componentDidMount() {
      if (!mapboxgl) {
        return;
      }
  
      const mapStyle = Immutable.Map.isMap(this.props.mapStyle) ?
        this.props.mapStyle.toJS() :
        this.props.mapStyle;
      const map = new mapboxgl.Map({
        container: this._mapboxMap,
        center: [this.props.longitude, this.props.latitude],
        zoom: this.props.zoom,
        pitch: this.props.pitch,
        bearing: this.props.bearing,
        style: mapStyle,
        interactive: false,
        attributionControl: this.props.attributionControl,
        preserveDrawingBuffer: this.props.preserveDrawingBuffer
      });
  
      // Disable outline style
      const canvas = map.getCanvas();
      if (canvas) {
        canvas.style.outline = 'none';
      }
  
      // Attach optional onLoad function
      map.once('load', this.props.onLoad);
  
      this._map = map;
      this._updateMapViewport({}, this.props);
      // this._callOnChangeViewport(map.transform);
      this._updateQueryParams(mapStyle);
    }
  
    componentWillReceiveProps(newProps) {
      if (!mapboxgl) {
        return;
      }
  
      this._updateStateFromProps(this.props, newProps);
      this._updateMapViewport(this.props, newProps);
      this._updateMapStyle(this.props, newProps);
      // Save width/height so that we can check them in componentDidUpdate
      this.setState({
        width: this.props.width,
        height: this.props.height
      });
    }
  
    componentDidUpdate() {
      if (!mapboxgl) {
        return;
      }
  
      // Since Mapbox's map.resize() reads size from DOM
      // we must wait to read size until after render (i.e. here in "didUpdate")
      this._updateMapSize(this.state, this.props);
    }
  
    componentWillUnmount() {
      if (!mapboxgl) {
        return;
      }
  
      if (this._map) {
        this._map.remove();
      }
    }
  
    // External apps can access map this way
    getMap() {
      return this._map;
    }
  
    /** Uses Mapbox's
      * queryRenderedFeatures API to find features at point or in a bounding box.
      * https://www.mapbox.com/mapbox-gl-js/api/#Map#queryRenderedFeatures
      * To query only some of the layers, set the `interactive` property in the
      * layer style to `true`.
      * @param {[Number, Number]|[[Number, Number], [Number, Number]]} geometry -
      *   Point or an array of two points defining the bounding box
      * @param {Object} parameters - query options
      */
    queryRenderedFeatures(geometry, parameters) {
      const queryParams = parameters || this._queryParams;
      if (queryParams.layers && queryParams.layers.length === 0) {
        return [];
      }
      return this._map.queryRenderedFeatures(geometry, queryParams);
    }
  
    _updateStateFromProps(oldProps, newProps) {
      if (mapboxgl) {
        mapboxgl.accessToken = newProps.mapboxApiAccessToken;
      }
    }
  
    // Hover and click only query layers whose interactive property is true
    _updateQueryParams(mapStyle) {
      const interactiveLayerIds = getInteractiveLayerIds(mapStyle);
      this._queryParams = {layers: interactiveLayerIds};
    }
  
    // Update a source in the map style
    _updateSource(map, update) {
      const newSource = update.source.toJS();
      if (newSource.type === 'geojson') {
        const oldSource = map.getSource(update.id);
        if (oldSource.type === 'geojson') {
          // update data if no other GeoJSONSource options were changed
          const oldOpts = oldSource.workerOptions;
          if (
            (newSource.maxzoom === undefined ||
              newSource.maxzoom === oldOpts.geojsonVtOptions.maxZoom) &&
            (newSource.buffer === undefined ||
              newSource.buffer === oldOpts.geojsonVtOptions.buffer) &&
            (newSource.tolerance === undefined ||
              newSource.tolerance === oldOpts.geojsonVtOptions.tolerance) &&
            (newSource.cluster === undefined ||
              newSource.cluster === oldOpts.cluster) &&
            (newSource.clusterRadius === undefined ||
              newSource.clusterRadius === oldOpts.superclusterOptions.radius) &&
            (newSource.clusterMaxZoom === undefined ||
              newSource.clusterMaxZoom === oldOpts.superclusterOptions.maxZoom)
          ) {
            oldSource.setData(newSource.data);
            return;
          }
        }
      }
  
      map.removeSource(update.id);
      map.addSource(update.id, newSource);
    }
  
    // Individually update the maps source and layers that have changed if all
    // other style props haven't changed. This prevents flicking of the map when
    // styles only change sources or layers.
    /* eslint-disable max-statements, complexity */
    _setDiffStyle(prevStyle, nextStyle) {
      const prevKeysMap = prevStyle && styleKeysMap(prevStyle) || {};
      const nextKeysMap = styleKeysMap(nextStyle);
      function styleKeysMap(style) {
        return style.map(() => true).delete('layers').delete('sources').toJS();
      }
      function propsOtherThanLayersOrSourcesDiffer() {
        const prevKeysList = Object.keys(prevKeysMap);
        const nextKeysList = Object.keys(nextKeysMap);
        if (prevKeysList.length !== nextKeysList.length) {
          return true;
        }
        // `nextStyle` and `prevStyle` should not have the same set of props.
        if (nextKeysList.some(
          key => prevStyle.get(key) !== nextStyle.get(key)
          // But the value of one of those props is different.
        )) {
          return true;
        }
        return false;
      }
  
      const map = this._map;
  
      if (!prevStyle || propsOtherThanLayersOrSourcesDiffer()) {
        map.setStyle(nextStyle.toJS());
        return;
      }
  
      const {sourcesDiff, layersDiff} = diffStyles(prevStyle, nextStyle);
  
      // TODO: It's rather difficult to determine style diffing in the presence
      // of refs. For now, if any style update has a ref, fallback to no diffing.
      // We can come back to this case if there's a solid usecase.
      if (layersDiff.updates.some(node => node.layer.get('ref'))) {
        map.setStyle(nextStyle.toJS());
        return;
      }
  
      for (const enter of sourcesDiff.enter) {
        map.addSource(enter.id, enter.source.toJS());
      }
      for (const update of sourcesDiff.update) {
        this._updateSource(map, update);
      }
      for (const exit of sourcesDiff.exit) {
        map.removeSource(exit.id);
      }
      for (const exit of layersDiff.exiting) {
        if (map.style.getLayer(exit.id)) {
          map.removeLayer(exit.id);
        }
      }
      for (const update of layersDiff.updates) {
        if (!update.enter) {
          // This is an old layer that needs to be updated. Remove the old layer
          // with the same id and add it back again.
          map.removeLayer(update.id);
        }
        map.addLayer(update.layer.toJS(), update.before);
      }
    }
    /* eslint-enable max-statements, complexity */
  
    _updateMapStyle(oldProps, newProps) {
      const mapStyle = newProps.mapStyle;
      const oldMapStyle = oldProps.mapStyle;
      if (mapStyle !== oldMapStyle) {
        if (Immutable.Map.isMap(mapStyle)) {
          if (this.props.preventStyleDiffing) {
            this._map.setStyle(mapStyle.toJS());
          } else {
            this._setDiffStyle(oldMapStyle, mapStyle);
          }
        } else {
          this._map.setStyle(mapStyle);
        }
        this._updateQueryParams(mapStyle);
      }
    }
  
    _updateMapViewport(oldProps, newProps) {
      const viewportChanged =
        newProps.latitude !== oldProps.latitude ||
        newProps.longitude !== oldProps.longitude ||
        newProps.zoom !== oldProps.zoom ||
        newProps.pitch !== oldProps.pitch ||
        newProps.bearing !== oldProps.bearing ||
        newProps.altitude !== oldProps.altitude;
  
      if (viewportChanged) {
        this._map.jumpTo({
          center: [newProps.longitude, newProps.latitude],
          zoom: newProps.zoom,
          bearing: newProps.bearing,
          pitch: newProps.pitch
        });
  
        // TODO - jumpTo doesn't handle altitude
        if (newProps.altitude !== oldProps.altitude) {
          this._map.transform.altitude = newProps.altitude;
        }
      }
    }
  
    // Note: needs to be called after render (e.g. in componentDidUpdate)
    _updateMapSize(oldProps, newProps) {
      const sizeChanged =
        oldProps.width !== newProps.width || oldProps.height !== newProps.height;
  
      if (sizeChanged) {
        this._map.resize();
        // this._callOnChangeViewport(this._map.transform);
      }
    }
  
    _mapboxMapLoaded(ref) {
      this._mapboxMap = ref;
    }
  
    render() {
      const {className, width, height, style, visible} = this.props;
      const mapContainerStyle = Object.assign({}, style, {width, height, position: 'relative'});
      const mapStyle = Object.assign({}, style, {
        width,
        height,
        visibility: visible ? 'visible' : 'hidden'
      });
      const overlayContainerStyle = {
        position: 'absolute',
        left: 0,
        top: 0,
        width,
        height,
        overflow: 'hidden'
      };
  
      // Note: a static map still handles clicks and hover events
      return (
        createElement('div', {
          key: 'map-container',
          style: mapContainerStyle,
          children: [
            createElement('div', {
              key: 'map-mapbox',
              ref: this._mapboxMapLoaded,
              style: mapStyle,
              className
            }),
            createElement('div', {
              key: 'map-overlays',
              // Same as interactive map's overlay container
              className: 'overlays',
              style: overlayContainerStyle,
              children: this.props.children
            })
          ]
        })
      );
    }
  }
  
  StaticMap.displayName = 'StaticMap';
  StaticMap.propTypes = propTypes;
  StaticMap.defaultProps = defaultProps;
  StaticMap.childContextTypes = childContextTypes;
  