using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Config
{
    public static class Utils
    {
        public static string SignificantDigitsToFmt(double value, int sigDigits)
        {
            if (sigDigits == 5)
            {
                if (value >= 9999.5 || value < -9999.5) return "F0";
                else if (value >= 999.95 || value < -999.95) return "F1";
                else if (value >= 99.995 || value < -99.995) return "F2";
                else if (value >= 9.9995 || value < -9.9995) return "F3";
                else if (value >= 0.99995 || value < -0.99995) return "F4";
                else if (value >= 0.099995 || value < -0.099995) return "F5";
                else if (value >= 0.0099995 || value < -0.0099995) return "F6";
                else if (value >= 0.00099995 || value < -0.00099995) return "F7";
                else if (value >= 0.000099995 || value < -0.000099995) return "F8";
                else return "F9";
            }
            else if (sigDigits == 4)
            {
                if (value >= 999.5 || value < -999.5) return "F0";
                else if (value >= 99.95 || value < -99.95) return "F1";
                else if (value >= 9.995 || value < -9.995) return "F2";
                else if (value >= 0.9995 || value < -0.9995) return "F3";
                else if (value >= 0.09995 || value < -0.09995) return "F4";
                else if (value >= 0.009995 || value < -0.009995) return "F5";
                else if (value >= 0.0009995 || value < -0.0009995) return "F6";
                else if (value >= 0.00009995 || value < -0.00009995) return "F7";
                else return "F8";
            }
            else if (sigDigits == 3)
            {
                if (value >= 99.5 || value < -99.5) return "F0";
                else if (value >= 9.95 || value < -9.95) return "F1";
                else if (value >= 0.995 || value < -0.995) return "F2";
                else if (value >= 0.0995 || value < -0.0995) return "F3";
                else if (value >= 0.00995 || value < -0.00995) return "F4";
                else if (value >= 0.000995 || value < -0.000995) return "F5";
                else if (value >= 0.0000995 || value < -0.0000995) return "F6";
                else return "F7";
            }
            else if (sigDigits == 2)
            {
                if (value >= 9.5 || value < -9.5) return "F0";
                else if (value >= 0.95 || value < -0.95) return "F1";
                else if (value >= 0.095 || value < -0.095) return "F2";
                else if (value >= 0.0095 || value < -0.0095) return "F3";
                else if (value >= 0.00095 || value < -0.00095) return "F4";
                else if (value >= 0.000095 || value < -0.000095) return "F5";
                else return "F6";
            }
            else /// if (sigDigits == 1)
            {
                if (value >= 0.95 || value < -0.95) return "F0";
                else if (value >= 0.095 || value < -0.095) return "F1";
                else if (value >= 0.0095 || value < -0.0095) return "F2";
                else if (value >= 0.00095 || value < -0.00095) return "F3";
                else if (value >= 0.000095 || value < -0.000095) return "F4";
                else return "F5";
            }
        }
    }
}