using System;
using System.Linq;
using System.Reflection;
using System.Collections.Generic;

namespace FilterAPI.Handlers
{
	public class FilterAssembly
	{
		public static IEnumerable<Combine<MsgHandlerAttribute, MethodInfo>> FindHandlers<MsgHandlerAttribute>()
			where MsgHandlerAttribute : Attribute
		{
			return (from Method in AppDomain.CurrentDomain.GetAssemblies()
						.Where(Assembly => !Assembly.GlobalAssemblyCache)
						.SelectMany(Types => Types.GetTypes())
						.SelectMany(Methods => Methods.GetMethods())
					let CustomAttribute = Attribute.GetCustomAttribute(Method, typeof(MsgHandlerAttribute), false) as MsgHandlerAttribute
					where CustomAttribute != null
					select new Combine<MsgHandlerAttribute, MethodInfo>(CustomAttribute, Method));
		}
	}
}