using System.Collections.Generic;
using System.Reflection;
using System.Runtime.CompilerServices;
using XNeedle.Parser.Elements;

namespace XNeedle.Transformation
{
    public abstract class BangOperation
    {
        private static readonly Dictionary<string, BangOperation> Registry = new();

        public abstract string Name { get; }

        protected BangOperation()
        {
            Registry[Name] = this;
        }

        public abstract Context Execute(Context ctx, IEnumerable<string> arguments);

        public static BangOperation? Resolve(string name) =>
            Registry.TryGetValue(name, out var op) ? op : null;

        public static void RegisterAll()
        {
            foreach (var type in Assembly.GetExecutingAssembly().GetTypes())
                if (!type.IsAbstract && type.IsSubclassOf(typeof(BangOperation)))
                    Activator.CreateInstance(type);
        }
    }
}