namespace MusicBridge.Agent.Media;

internal static class TimelineMath
{
    public static double Position(double position, double start, double end, bool playing,
        DateTimeOffset updatedAt, DateTimeOffset now, double rate)
    {
        if (playing && updatedAt > DateTimeOffset.UnixEpoch && updatedAt <= now && double.IsFinite(rate))
            position += (now - updatedAt).TotalSeconds * rate;
        position = Math.Max(start, position);
        return end > start ? Math.Min(end, position) : position;
    }

    public static (double Min, double Max) SeekRange(double start, double end, double min, double max)
        => (Math.Max(start, min), end > start ? Math.Min(end, max) : max);
}