using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;

namespace IRIGCh10
{
    /// <summary>
    /// allows annotating enums with a description attribute, in chapter 10 this allows us
    /// to associate an enum with a string to put in the TMATS file for that enum
    /// </summary>
    public static class DescriptionDecoder
    {
        public static string GetDescription(Enum value)
        {
            var fi = value.GetType().GetField(value.ToString());
            var attributes = (DescriptionAttribute[])fi.GetCustomAttributes(
                typeof(DescriptionAttribute), false);
            if (attributes.Any())
            {
                return attributes.First().Description;
            }
            return value.ToString();
        }
    }
    /// <summary>
    /// a lot of attributes in chapter 10 have a max length associated with them
    /// note however though that max length in chapter 10 is just a suggested
    /// max length, not a requirement ...
    /// </summary>
    public static class MaxLengthDecoder
    {
        public static int GetMaxLength(Enum value)
        {
            var fi = value.GetType().GetField(value.ToString());
            var attributes = (MaxLengthAttribute[])fi.GetCustomAttributes(
                typeof(MaxLengthAttribute), false);
            if (attributes.Any())
            {
                return attributes.First().Length;
            }
            return 0;
        }
    }
}