/// <summary>
/// Calculates the remaining <see cref="TimeSpan"/> until the thing's exhaustion is over.
/// </summary>
/// <param name="thing">The thing to check the conditions on.</param>
/// <param name="exhaustionType">The type of condition.</param>
/// <param name="currentTime">The current time to calculate from.</param>
/// <returns>The <see cref="TimeSpan"/> result.</returns>
public static TimeSpan RemainingExhaustionTime(this IThing thing, ExhaustionType exhaustionType, DateTimeOffset currentTime)
{
thing.ThrowIfNull(nameof(thing));
if (!thing.IsExhausted(exhaustionType))
{
return(TimeSpan.Zero);
}
var exhaustionCondition = thing.TrackedEvents[ConditionType.Exhausted.ToString()] as IExhaustionCondition;
if (!exhaustionCondition.ExhaustionTimesPerType.TryGetValue(exhaustionType, out DateTimeOffset exhaustionEndTime))
{
return(TimeSpan.Zero);
}
var timeLeft = exhaustionEndTime - currentTime;
return(timeLeft < TimeSpan.Zero ? TimeSpan.Zero : timeLeft);
}
