import { Scene, HeatmapLayer } from '@antv/l7';
import { Mapbox } from '@antv/l7-maps';

const scene = new Scene({
  id: 'map',
  map: new Mapbox({
    style: 'dark',
    pitch: 47.49999999999995,
    center: [ 112.50447776627743, 30.830476390931125 ],
    zoom: 3.9879693680088626
  })
});
scene.on('loaded', () => {
  fetch(
    'https://gw.alipayobjects.com/os/basement_prod/7359a5e9-3c5e-453f-b207-bc892fb23b84.csv'
  )
    .then(res => res.text())
    .then(data => {
      const layer = new HeatmapLayer({})
        .source(data, {
          parser: {
            type: 'csv',
            x: 'lng',
            y: 'lat'
          },
          transforms: [
            {
              type: 'hexagon',
              size: 200000,
              field: 'v',
              method: 'sum'
            }
          ]
        })
        .size('sum', value => {
          return value * 20;
        })
        .shape('hexagonColumn')
        .color(
          'count',
          [
            '#FF4818',
            '#F7B74A',
            '#FFF598',
            '#FF40F3',
            '#9415FF',
            '#421EB2'
          ].reverse()
        )
        .style({
          coverage: 0.9,
          angle: 0
        });

      scene.addLayer(layer);
    });
});