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: "translateX",
  panY: "translateY",
  projection: am5map.geoMercator()
}));


// 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")
});

let previousPolygon;

polygonSeries.mapPolygons.template.on("active", (active, target) => {
  if (previousPolygon && previousPolygon != target) {
    previousPolygon.set("active", false);
  }
  if (target.get("active")) {
    polygonSeries.zoomToDataItem(target.dataItem );
  }
  else {
    chart.goHome();
  }
  previousPolygon = target;
});


// Add zoom control
// https://www.amcharts.com/docs/v5/charts/map-chart/map-pan-zoom/#Zoom_control
var zoomControl = chart.set("zoomControl", am5map.ZoomControl.new(root, {}));
zoomControl.homeButton.set("visible", true);


// Set clicking on "water" to zoom out
chart.chartContainer.get("background").events.on("click", () => {
  chart.goHome();
})


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