export default class BeatLeaderCurve {
	static curve(acc, stars) {
		var l = 1 - (0.03 * (stars - 3.0)) / 11.0;
		var a = 0.96 * l;
		var f = 1.2 - (0.6 * stars) / 14.0;

		return Math.pow(Math.log10(l / (l - acc)) / Math.log10(l / (l - a)), f);
	}

	static getPP(acc, stars) {
		if (stars === undefined || acc === undefined) {
			return undefined;
		}
		const pp =
			BeatLeaderCurve.curve(acc / 100, stars - 0.5) * (stars + 0.5) * 42;
		return Number.isNaN(pp) ? undefined : pp;
	}
}