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package br.com.anteros.nosql.persistence.mongodb.geo;

public final class GeoJson {
	private GeoJson() {
	}

	public static Point point(final double latitude, final double longitude) {
		return new Point(latitude, longitude);
	}

	public static Polygon polygon(final Point... points) {
		LineString exteriorBoundary = lineString(points);
		ensurePolygonIsClosed(exteriorBoundary);
		return new Polygon(exteriorBoundary);
	}

	public static LineString lineString(final Point... points) {
		return new LineString(points);
	}

	private static void ensurePolygonIsClosed(final LineString points) {
		int size = points.getCoordinates().size();
		if (size > 0 && !points.getCoordinates().get(0).equals(points.getCoordinates().get(size - 1))) {
			throw new IllegalArgumentException(
					"A polygon requires the starting point to be the same as the end to ensure a closed " + "area");
		}
	}

	public static Polygon polygon(final LineString exteriorBoundary, final LineString... interiorBoundaries) {
		ensurePolygonIsClosed(exteriorBoundary);
		for (final LineString boundary : interiorBoundaries) {
			ensurePolygonIsClosed(boundary);
		}
		return new Polygon(exteriorBoundary, interiorBoundaries);
	}

	public static MultiPoint multiPoint(final Point... points) {
		return new MultiPoint(points);
	}

	public static MultiLineString multiLineString(final LineString... lines) {
		return new MultiLineString(lines);
	}

	public static MultiPolygon multiPolygon(final Polygon... polygons) {
		return new MultiPolygon(polygons);
	}

	public static GeometryCollection geometryCollection(final Geometry... geometries) {
		return new GeometryCollection(geometries);
	}
}