using System.Reflection;

namespace BotPages.Core
{
    public static class ActionExtensions
    {
        private static readonly Dictionary<Type, Dictionary<string, object>> _cache = new();

        public static string GetActionLabel<T>(this T value)
            where T : Enum
        {
            var fieldName = value.ToString();
            var field = typeof(T).GetField(fieldName, BindingFlags.Public | BindingFlags.Static);
            return field?.GetCustomAttribute<ActionAttribute>()?.Label ?? fieldName;
        }

        public static T? FromActionLabel<T>(string? value) where T : struct, Enum
        {
            if (value == null) return null;

            var type = typeof(T);
            if (!_cache.TryGetValue(type, out var map))
            {
                map = new Dictionary<string, object>();

                var fields = type.GetFields(BindingFlags.Public | BindingFlags.Static);

                foreach (var field in fields)
                {
                    var fieldValue = field.GetValue(null)!;
                    var fieldName = field.Name;

                    var attr = field.GetCustomAttribute<ActionAttribute>();

                    if (attr != null)
                    {
                        fieldName = attr.Label;
                    }

                    map[fieldName] = fieldValue;
                }

            }

            return map.TryGetValue(value, out var result) ? (T)result : null;
        }
    }
}