using System.ComponentModel;
using System.Reflection;

namespace Common.Helpers;

public static class EnumHelpers
{
    /// <summary>
    /// Parse enum from string to enum type.
    /// </summary>
    /// <typeparam name="T">type of the enum</typeparam>
    /// <param name="value">value to parse to enum</param>
    /// <returns>returns enum object with value</returns>
    public static T ParseEnum<T>(string value)
    {
        return (T)Enum.Parse(typeof(T), value, true);
    }

    /// <summary>
    /// Gets the description of an Enum value.
    /// If there is no Description set, the Enum Value will be converted to string.
    /// </summary>
    /// <param name="enumObject">Enum Object to get Description of.</param>
    /// <returns>String with Content of DescriptionAttribute of Enum object.</returns>
    public static string GetEnumDescription(Enum enumObject)
    {
        // guard argument null
        if (enumObject == null) { throw new ArgumentNullException(nameof(enumObject)); }

        // get field info from enum type
        FieldInfo? fieldInfo = enumObject.GetType().GetField(enumObject.ToString());
        // return string of enum value if there is no field info
        if (fieldInfo == null)
        {
            return enumObject.ToString();
        }

        // get description attribute and return if it is present
        DescriptionAttribute? descAttrib = (DescriptionAttribute?)fieldInfo.GetCustomAttribute(typeof(DescriptionAttribute), true);
        if (descAttrib != null)
        {
            return descAttrib.Description;
        }

        // if no description attribute was found => return string of enum value
        return enumObject.ToString();
    }
}