import * as am5 from "@amcharts/amcharts5";
import * as am5map from "@amcharts/amcharts5/map";
import am5geodata_worldLow from "@amcharts/amcharts5-geodata/worldLow";
import am5themes_Animated from "@amcharts/amcharts5/themes/Animated";


// Create root element
// https://www.amcharts.com/docs/v5/getting-started/#Root_element
const root = am5.Root.new("chartdiv");


// Set themes
// https://www.amcharts.com/docs/v5/concepts/themes/
root.setThemes([
  am5themes_Animated.new(root)
]);


// Create the map chart
// https://www.amcharts.com/docs/v5/charts/map-chart/
const chart = root.container.children.push(am5map.MapChart.new(root, {
  panX: "rotateX",
  panY: "rotateY",
  projection: am5map.geoOrthographic(),
  paddingBottom: 20,
  paddingTop: 20,
  paddingLeft: 20,
  paddingRight: 20
}));


// Create main polygon series for countries
// https://www.amcharts.com/docs/v5/charts/map-chart/map-polygon-series/
const polygonSeries = chart.series.push(am5map.MapPolygonSeries.new(root, {
  geoJSON: am5geodata_worldLow 
}));

polygonSeries.mapPolygons.template.setAll({
  tooltipText: "{name}",
  toggleKey: "active",
  interactive: true
});

polygonSeries.mapPolygons.template.states.create("hover", {
  fill: root.interfaceColors.get("primaryButtonHover")
});

polygonSeries.mapPolygons.template.states.create("active", {
  fill: root.interfaceColors.get("primaryButtonHover")
});


// Create series for background fill
// https://www.amcharts.com/docs/v5/charts/map-chart/map-polygon-series/#Background_polygon
const backgroundSeries = chart.series.push(am5map.MapPolygonSeries.new(root, {}));
backgroundSeries.mapPolygons.template.setAll({
  fill: root.interfaceColors.get("alternativeBackground"),
  fillOpacity: 0.1,
  strokeOpacity: 0
});
backgroundSeries.data.push({
  geometry: am5map.getGeoRectangle(90, 180, -90, -180)
});


// Set up events
let previousPolygon;

polygonSeries.mapPolygons.template.on("active", (active, target) => {
  if (previousPolygon && previousPolygon != target) {
    previousPolygon.set("active", false);
  }
  if (target.get("active")) {
    const centroid = target.geoCentroid();
    if (centroid) {
      chart.animate({ key: "rotationX", to: -centroid.longitude, duration: 1500, easing: am5.ease.inOut(am5.ease.cubic) });
      chart.animate({ key: "rotationY", to: -centroid.latitude, duration: 1500, easing: am5.ease.inOut(am5.ease.cubic) });
    }
  }

  previousPolygon = target;
});


// Make stuff animate on load
chart.appear(1000, 100);