namespace MeetingAssistant.Workflow;

internal static class WorkflowRulesEditorScrollPolicy
{
    private const double BottomTolerance = 8;

    public static bool ShouldAutoScroll(
        double verticalOffset,
        double viewportHeight,
        double previousContentHeight)
    {
        if (viewportHeight <= 0 || previousContentHeight <= 0)
        {
            return true;
        }

        if (previousContentHeight <= viewportHeight)
        {
            return true;
        }

        return verticalOffset + viewportHeight >= previousContentHeight - BottomTolerance;
    }

    public static double GetBottomOffset(
        double viewportHeight,
        double contentHeight)
    {
        return Math.Max(0, contentHeight - viewportHeight);
    }
}