using System;

namespace Footwear_Test_methodsfor_wholeshoe_Slipresistanceperformance.Models
{
    public sealed record SlipDeviceSnapshot(
        DateTime Timestamp,
        double VerticalLoadN,
        double HorizontalFrictionN,
        double DisplacementMm,
        bool IsTestRunning,
        bool IsResetting,
        bool IsConnected,
        string LastError)
    {
        public double FrictionCoefficient => Math.Abs(VerticalLoadN) > 0.0001
            ? HorizontalFrictionN / VerticalLoadN
            : 0;

        public static SlipDeviceSnapshot Offline(string error = "") =>
            new(DateTime.Now, 0, 0, 0, false, false, false, error);
    }
}