public async Task <Brain> Light(IBulb bulb, int?intensity = null, int?autoDimBy = null)
{
if (Bulbs.Contains(bulb))
{
throw new ArgumentException(
$"Bulb '{bulb}' is already lighted.", nameof(bulb));
}
var adjustedBulb = await bulb.Adjust(intensity, autoDimBy);
var nextBrain = await WithBulb(adjustedBulb);
return(nextBrain);
}
public async Task <Brain> Adjust(IBulb bulb, int?intensity = null, int?autoDimBy = null)
{
if (!Bulbs.Contains(bulb))
{
throw new ArgumentException(
$"Bulb '{bulb}' is not lighted.", nameof(bulb));
}
var adjustedBulb = await bulb.Adjust(intensity, autoDimBy);
var shouldRemove = (adjustedBulb.Intensity <= 0);
var nextBrain =
shouldRemove
? await WithoutBulb(adjustedBulb)
: await WithBulbEvent(adjustedBulb);
return(nextBrain);
}