/**
 * Calculate hot score using HN-style algorithm
 * score = votes / (age_hours + 2)^gravity
 */
export function calculateHotScore(voteCount: number, createdAt: string, gravity = 1.5): number {
	const ageMs = Date.now() - new Date(createdAt).getTime();
	const ageHours = ageMs / (1000 * 60 * 60);
	return voteCount / Math.pow(ageHours + 2, gravity);
}