import { getUid } from "ol";
import { Stroke, Style } from "ol/style.js";
import { GeoJSON } from "ol/format.js";
import TileWMS from "ol/source/TileWMS.js";

import { MathUtils, Vector3 } from "three";
import { MapControls } from "three/examples/jsm/controls/MapControls.js";
import { CSS2DObject } from "three/examples/jsm/renderers/CSS2DRenderer.js";

import Extent from "@giro3d/giro3d/core/geographic/Extent.js";
import Instance from "@giro3d/giro3d/core/Instance.js";
import Map from "@giro3d/giro3d/entities/Map.js";
import ColorLayer from "@giro3d/giro3d/core/layer/ColorLayer.js";
import Inspector from "@giro3d/giro3d/gui/Inspector.js";
import TiledImageSource from "@giro3d/giro3d/sources/TiledImageSource.js";
import VectorSource from "@giro3d/giro3d/sources/VectorSource.js";
import Coordinates from "@giro3d/giro3d/core/geographic/Coordinates";

Instance.registerCRS(
  "EPSG:3946",
  "+proj=lcc +lat_1=45.25 +lat_2=46.75 +lat_0=46 +lon_0=3 +x_0=1700000 +y_0=5200000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs",
);

const extent = new Extent(
  "EPSG:3946",
  1837816.94334,
  1847692.32501,
  5170036.4587,
  5178412.82698,
);

const instance = new Instance({
  target: "view",
  crs: extent.crs,
  backgroundColor: 0x0a3b59,
});

const map = new Map({ extent });
instance.add(map);

// Adds a WMS imagery layer
const colorSource = new TiledImageSource({
  source: new TileWMS({
    url: "https://data.geopf.fr/wms-r",
    projection: "EPSG:3946",
    params: {
      LAYERS: ["HR.ORTHOIMAGERY.ORTHOPHOTOS"],
      FORMAT: "image/jpeg",
    },
  }),
});

const colorLayer = new ColorLayer({
  name: "orthoimagery",
  extent,
  source: colorSource,
});
map.addLayer(colorLayer);

const featureColors = new window.Map();

function getColor(id) {
  if (featureColors.has(id)) {
    return featureColors.get(id);
  }
  const hue = MathUtils.randFloat(30, 340);
  const color = `hsl(${hue}, 70%, 50%)`;

  featureColors.set(id, color);
  return color;
}

const style = (feature) => {
  const id = getUid(feature);
  const highlight = feature.get("highlight");
  const width = highlight ? 10 : 6;
  const color = getColor(id);
  return [
    new Style({
      zIndex: highlight ? 10 : 0,
      stroke: new Stroke({
        color: "white",
        width,
      }),
    }),
    new Style({
      zIndex: highlight ? 10 : 0,
      stroke: new Stroke({
        color,
        width: width - 2,
      }),
    }),
  ];
};

// Adds a WFS imagery layer
const wfsSource = new VectorSource({
  dataProjection: "EPSG:3946",
  data: {
    url:
      "https://download.data.grandlyon.com/wfs/rdata" +
      "?SERVICE=WFS" +
      "&VERSION=2.0.0" +
      "&request=GetFeature" +
      "&typename=tcl_sytral.tcllignebus_2_0_0" +
      "&outputFormat=application/json;%20subtype=geojson" +
      "&SRSNAME=EPSG:3946" +
      "&startIndex=0",
    format: new GeoJSON(),
  },
  style,
});

const wfsLayer = new ColorLayer({
  name: "lyon_tcl_bus",
  extent,
  source: wfsSource,
});

map.addLayer(wfsLayer);

instance.view.camera.position.set(1839739, 5171618, 910);

const controls = new MapControls(instance.view.camera, instance.domElement);
controls.target = new Vector3(1840839, 5172718, 0);
controls.saveState();
controls.enableDamping = true;
controls.dampingFactor = 0.2;
controls.maxPolarAngle = Math.PI / 2.3;
instance.view.setControls(controls);

const labelElement = document.createElement("div");
labelElement.classList.value = "badge rounded-pill text-bg-light";
labelElement.style.marginTop = "2rem";

const lineName = document.createElement("span");
lineName.style.marginLeft = "0.5rem";

const lineNumber = document.createElement("span");
lineNumber.classList.value = "badge rounded-pill";
lineNumber.style.color = "white";
lineNumber.style.background = "red";
lineNumber.innerText = "32";

labelElement.appendChild(lineNumber);
labelElement.appendChild(lineName);

const label = new CSS2DObject(labelElement);

label.visible = false;
instance.add(label);

let previousFeature;

function pickFeatures(mouseEvent) {
  const pickResult = instance.pickObjectsAt(mouseEvent);

  const picked = pickResult[0];

  function resetPickedFeatures() {
    if (previousFeature) {
      previousFeature.set("highlight", false);
      wfsSource.updateFeature(previousFeature);
    }
    if (label.visible) {
      label.visible = false;
    }
    previousFeature = null;
  }

  if (picked) {
    const { x, y } = picked.point;
    const coordinates = new Coordinates(instance.referenceCrs, x, y);
    const features = wfsLayer.getVectorFeaturesAtCoordinate(coordinates, {
      radius: 3,
      xTileRes: 2,
      yTileRes: 2,
    });

    if (features.length > 0) {
      const firstFeature = features[features.length - 1];

      previousFeature?.set("highlight", false);
      firstFeature.set("highlight", true);

      if (previousFeature !== firstFeature) {
        wfsSource.updateFeature(previousFeature, firstFeature);
        previousFeature = firstFeature;
      }

      label.position.set(x, y, 0);
      label.visible = true;
      lineNumber.style.background = getColor(getUid(firstFeature));
      lineNumber.innerText = firstFeature.get("ligne");
      lineName.innerText = firstFeature.get("nom_trace");
      label.updateMatrixWorld(true);
    } else {
      resetPickedFeatures();
    }
  } else {
    resetPickedFeatures();
  }
}

instance.domElement.addEventListener("mousemove", pickFeatures);

Inspector.attach("inspector", instance);

<!doctype html>
<html lang="en">
  <head>
    <title>Draped WFS</title>
    <meta charset="UTF-8" />
    <meta name="name" content="wfs" />
    <meta name="description" content="Display a WFS layer on a Map." />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />

    <link rel="icon" href="https://giro3d.org/images/favicon.svg" />
    <link
      href="https://giro3d.org/assets/bootstrap-custom.css"
      rel="stylesheet"
    />
    <script src="https://giro3d.org/assets/bootstrap.bundle.min.js"></script>
    <link
      rel="stylesheet"
      type="text/css"
      href="https://giro3d.org/next/css/example.css"
    />
  </head>

  <body>
    <div id="view" class="m-0 p-0 w-100 h-100"></div>
    <div
      id="inspector"
      class="position-absolute top-0 start-0 mh-100 overflow-auto"
    ></div>

    <script type="module" src="index.js"></script>
    <script>
      /* activate popovers */
      const popoverTriggerList = [].slice.call(
        document.querySelectorAll('[data-bs-toggle="popover"]'),
      );
      popoverTriggerList.map(
        // bootstrap is used as script in the template, disable warning about undef
        // eslint-disable-next-line no-undef
        (popoverTriggerEl) =>
          new bootstrap.Popover(popoverTriggerEl, {
            trigger: "hover",
            placement: "left",
            content: document.getElementById(
              popoverTriggerEl.getAttribute("data-bs-content"),
            ).innerHTML,
            html: true,
          }),
      );
    </script>
  </body>
</html>

{
    "name": "wfs",
    "dependencies": {
        "@giro3d/giro3d": "git+https://gitlab.com/giro3d/giro3d.git"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}