namespace Mr.BrickAdventures.Progression;

/// <summary>
/// A completion time for one Level. Strictly positive — a zero time means the clock was never
/// running, which is a defect rather than a fast run.
/// </summary>
public readonly struct LevelTime : IEquatable<LevelTime>
{
    public double Seconds { get; }

    private LevelTime(double seconds) => Seconds = seconds;

    public static LevelTime Of(double seconds) => double.IsFinite(seconds) && seconds > 0
        ? new LevelTime(seconds)
        : throw new ArgumentOutOfRangeException(nameof(seconds), seconds, "A completion time must be a finite positive number.");

    public bool IsFasterThan(LevelTime other) => Seconds < other.Seconds;

    public bool Equals(LevelTime other) => Seconds.Equals(other.Seconds);
    public override bool Equals(object? obj) => obj is LevelTime other && Equals(other);
    public override int GetHashCode() => Seconds.GetHashCode();
    public override string ToString() => $"{Seconds:0.###}s";
}