using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;

namespace DTS.Common.Converters
{
    public class InitialOffsetToIEPESensorOffsetConverter : IValueConverter
    {
        /// <summary>
        /// Used to convert  millivolt offset to IEPE sensor offset in volts
        /// </summary>
        /// <param name="value"></param>
        /// <param name="targetType"></param>
        /// <param name="parameter"></param>
        /// <param name="culture"></param>
        /// <returns></returns>
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is double milliUnit)
            {
                return ConvertDouble(milliUnit);
            }
            else
            {
                return 0D;
            }
        }
        const double IEPE_MIDPOINT = 12.25D;

        public static double ConvertDouble(double milliUnit)
        {
            if (double.IsNaN(milliUnit)) { return 0D; }
            return (milliUnit / 1000.0D) + IEPE_MIDPOINT;
        }


        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is double unit)
            {
                if (double.IsNaN(unit)) { return 0D; }
                return (unit - IEPE_MIDPOINT) * 1000.0D;
            }
            else
            {
                return 0D;
            }
        }
    }
}