import GeoJSON from '../src/ol/format/GeoJSON.js';
import Map from '../src/ol/Map.js';
import VectorLayer from '../src/ol/layer/Vector.js';
import VectorSource from '../src/ol/source/Vector.js';
import View from '../src/ol/View.js';
import {Fill, Stroke, Style, Text} from '../src/ol/style.js';
import {fromLonLat} from '../src/ol/proj.js';

const map = new Map({
  target: 'map',
  view: new View({
    center: fromLonLat([-100, 38.5]),
    zoom: 4,
  }),
});

const labelStyle = new Style({
  text: new Text({
    font: '12px Calibri,sans-serif',
    overflow: true,
    fill: new Fill({
      color: '#000',
    }),
    stroke: new Stroke({
      color: '#fff',
      width: 3,
    }),
  }),
});
const countryStyle = new Style({
  fill: new Fill({
    color: 'rgba(255, 255, 255, 0.6)',
  }),
  stroke: new Stroke({
    color: '#319FD3',
    width: 1,
  }),
});
const style = [countryStyle, labelStyle];

const vectorLayer = new VectorLayer({
  background: 'white',
  source: new VectorSource({
    url: 'https://openlayers.org/data/vector/us-states.json',
    format: new GeoJSON(),
  }),
  style: function (feature) {
    const label = feature.get('name').split(' ').join('\n');
    labelStyle.getText().setText(label);
    return style;
  },
  declutter: true,
});

map.addLayer(vectorLayer);