namespace PrivaPub.Infrastructure.Jobs
{
	public static class Backoff
	{
		public static TimeSpan After(int attempt) =>
			TimeSpan.FromSeconds(Math.Pow(attempt, 4) + 15 + Random.Shared.Next(10) * (attempt + 1));

		public static TimeSpan HostQuarantine(int consecutiveFailures, int threshold) =>
			consecutiveFailures < threshold
				? TimeSpan.Zero
				: TimeSpan.FromHours(Math.Min(Math.Pow(2, consecutiveFailures - threshold), 24 * 7));
	}
}