using ytLive.Models;

namespace ytLive.Services.BackgroundEffects;

/// <summary>Identifies one rendered variant of a camera's frames (TASK 51): the effect plus its
/// strength, rounded to 2 decimals so a slider drag doesn't spawn a variant per pixel of travel.
/// <see cref="BackgroundEffect.None"/> always normalizes to strength 0 — the raw path.</summary>
public readonly record struct WebcamEffectKey(BackgroundEffect Effect, double Strength)
{
    public static WebcamEffectKey None => new(BackgroundEffect.None, 0);

    public static WebcamEffectKey For(BackgroundEffect effect, double strength)
        => effect == BackgroundEffect.None
            ? None
            : new WebcamEffectKey(effect, Math.Round(Math.Clamp(strength, 0, 1), 2));
}