import { multiPolygon, polygon, } from "@turf/helpers";
import { getGeom } from "@turf/invariant";
import polygonClipping from "polygon-clipping";
/**
 * Takes two {@link Polygon|polygon} or {@link MultiPolygon|multi-polygon} geometries and
 * finds their polygonal intersection. If they don't intersect, returns null.
 *
 * @name intersect
 * @param {Feature<Polygon | MultiPolygon>} poly1 the first polygon or multipolygon
 * @param {Feature<Polygon | MultiPolygon>} poly2 the second polygon or multipolygon
 * @param {Object} [options={}] Optional Parameters
 * @param {Object} [options.properties={}] Translate GeoJSON Properties to Feature
 * @returns {Feature|null} returns a feature representing the area they share (either a {@link Polygon} or
 * {@link MultiPolygon}). If they do not share any area, returns `null`.
 * @example
 * var poly1 = turf.polygon([[
 *   [-122.801742, 45.48565],
 *   [-122.801742, 45.60491],
 *   [-122.584762, 45.60491],
 *   [-122.584762, 45.48565],
 *   [-122.801742, 45.48565]
 * ]]);
 *
 * var poly2 = turf.polygon([[
 *   [-122.520217, 45.535693],
 *   [-122.64038, 45.553967],
 *   [-122.720031, 45.526554],
 *   [-122.669906, 45.507309],
 *   [-122.723464, 45.446643],
 *   [-122.532577, 45.408574],
 *   [-122.487258, 45.477466],
 *   [-122.520217, 45.535693]
 * ]]);
 *
 * var intersection = turf.intersect(poly1, poly2);
 *
 * //addToMap
 * var addToMap = [poly1, poly2, intersection];
 */
export default function intersect(poly1, poly2, options) {
    if (options === void 0) { options = {}; }
    var geom1 = getGeom(poly1);
    var geom2 = getGeom(poly2);
    var intersection = polygonClipping.intersection(geom1.coordinates, geom2.coordinates);
    if (intersection.length === 0)
        return null;
    if (intersection.length === 1)
        return polygon(intersection[0], options.properties);
    return multiPolygon(intersection, options.properties);
}