using System;

// ReSharper disable once CheckNamespace
namespace DTS.DASLib.Service
{
    /// <inheritdoc />
    /// <summary>
    /// this attribute allows us to associate a max input range in mV for a gain
    /// note that this can be computed using the gain itself and the input range
    /// but this allows us to more tightly control things (say by using 2450 instead of 2500 for full range or something similar)
    /// http://fogbugz/fogbugz/default.asp?10080
    /// </summary>
    public class MaxInputRangeAttribute : Attribute
    {
        /// <summary>
        /// returns the max input range in mV for gain
        /// http://fogbugz/fogbugz/default.asp?10080
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        public static double GetMaxInputRangemV(object o)
        {
            if (o == null) return 0D;
            var mi = o.GetType().GetMember(o.ToString());
            if (mi.Length <= 0) return 0D;
            return GetCustomAttribute(mi[0], typeof(MaxInputRangeAttribute)) is MaxInputRangeAttribute attr ? attr._maximumInputRangemV : 0D;
        }

        private readonly double _maximumInputRangemV;
        public MaxInputRangeAttribute(double maxInputRangemV)
        {
            _maximumInputRangemV = maxInputRangemV;
        }
    }
}