import { Color } from "three";
import GeoJSON from "ol/format/GeoJSON.js";
import { Fill, Stroke, Style } from "ol/style.js";

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

import ColorLayer from "@giro3d/giro3d/core/layer/ColorLayer.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 VectorSource from "@giro3d/giro3d/sources/VectorSource.js";
import Inspector from "@giro3d/giro3d/gui/Inspector.js";
import Coordinates from "@giro3d/giro3d/core/geographic/Coordinates.js";

const extent = new Extent(
  "EPSG:3857",
  -20037508.342789244,
  20037508.342789244,
  -20037508.342789244,
  20037508.342789244,
);

let time = 0;

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

instance.view.camera.position.set(0, 0, 10000000);

const controls = new MapControls(instance.view.camera, instance.domElement);
controls.enableDamping = true;
controls.dampingFactor = 0.25;
instance.view.setControls(controls);

const map = new Map({ extent, backgroundColor: "#135D66" });

instance.add(map);

const ecoRegionLayerStyle = (feature) => {
  const brightness = Math.sin((time / 1000) * 6) * 0.2;
  const featureColor = new Color(feature.get("COLOR") || "#eeeeee");
  const highlight = feature.get("highlight");

  const color = highlight
    ? new Color(featureColor).offsetHSL(0, 0, brightness)
    : featureColor;

  const stroke = highlight
    ? new Stroke({
        color: "white",
        width: 2,
      })
    : undefined;

  return new Style({
    zIndex: highlight ? 1 : 0,
    fill: new Fill({
      color: `#${color.getHexString()}`,
    }),
    stroke,
  });
};

const ecoRegionSource = new VectorSource({
  data: {
    url: "https://openlayers.org/data/vector/ecoregions.json",
    format: new GeoJSON(),
  },
  dataProjection: "EPSG:4326",
  style: ecoRegionLayerStyle,
});

const ecoRegionLayer = new ColorLayer({
  name: "ecoregions",
  extent,
  source: ecoRegionSource,
});

map.addLayer(ecoRegionLayer);

// Creates the country layer
const countryLayerStyle = new Style({
  stroke: new Stroke({
    color: "black",
    width: 1,
  }),
});

const countryLayer = new ColorLayer({
  name: "countries",
  extent,
  source: new VectorSource({
    data: {
      url: "https://openlayers.org/en/v5.3.0/examples/data/geojson/countries.geojson",
      format: new GeoJSON(),
    },
    dataProjection: "EPSG:4326",
    style: countryLayerStyle,
  }),
});

map.addLayer(countryLayer);

// Creates a custom vector layer
const geojson = {
  type: "FeatureCollection",
  features: [
    {
      type: "Feature",
      geometry: {
        type: "Point",
        coordinates: [102.0, 0.5],
      },
      properties: {
        prop0: "value0",
      },
    },
    {
      type: "Feature",
      geometry: {
        type: "LineString",
        coordinates: [
          [102.0, 0.0],
          [103.0, 1.0],
          [104.0, 0.0],
          [105.0, 1.0],
        ],
      },
      properties: {
        prop0: "value0",
        prop1: 0.0,
      },
    },
    {
      type: "Feature",
      geometry: {
        type: "Polygon",
        coordinates: [
          [
            [100.0, 0.0],
            [101.0, 0.0],
            [101.0, 1.0],
            [100.0, 1.0],
            [100.0, 0.0],
          ],
        ],
      },
      properties: {
        prop0: "value0",
        prop1: { this: "that" },
      },
    },
  ],
};

const customVectorLayerStyle = new Style({
  fill: new Fill({
    color: "cyan",
  }),
  stroke: new Stroke({
    color: "orange",
    width: 1,
  }),
});

const customVectorLayer = new ColorLayer({
  name: "geojson",
  extent,
  source: new VectorSource({
    data: {
      content: geojson,
      format: new GeoJSON(),
    },
    dataProjection: "EPSG:4326",
    style: customVectorLayerStyle,
  }),
});

map.addLayer(customVectorLayer);

const labelElement = document.createElement("span");
labelElement.classList.value = "badge rounded-pill text-bg-light";
labelElement.style.marginTop = "2rem";
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);
      ecoRegionSource.updateFeature(previousFeature);
    }
    if (label.visible) {
      label.visible = false;
    }
    previousFeature = null;
  }

  if (picked) {
    const { x, y } = picked.point;
    const features = ecoRegionLayer.getVectorFeaturesAtCoordinate(
      new Coordinates(instance.referenceCrs, x, y),
    );

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

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

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

      label.position.set(x, y, 100);
      label.visible = true;
      label.element.innerText = firstFeature.get("ECO_NAME");
      label.updateMatrixWorld(true);
    } else {
      resetPickedFeatures();
    }
  } else {
    resetPickedFeatures();
  }
}

function update(t) {
  time = t;
  if (previousFeature != null) {
    ecoRegionSource.updateFeature(previousFeature);
  }
  requestAnimationFrame(update);
}

update(0);

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

Inspector.attach("inspector", instance);

<!doctype html>
<html lang="en">
  <head>
    <title>Vector sources</title>
    <meta charset="UTF-8" />
    <meta name="name" content="ol_vector" />
    <meta
      name="description"
      content="Display Vector data on a Map using vector sources."
    />
    <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/latest/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": "ol_vector",
    "dependencies": {
        "@giro3d/giro3d": "0.39.0"
    },
    "devDependencies": {
        "vite": "^3.2.3"
    },
    "scripts": {
        "start": "vite",
        "build": "vite build"
    }
}