using Encompass.Exceptions;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Encompass
{
    [AttributeUsage(AttributeTargets.Class)]
    public class QueryWithout : Attribute
    {
        public readonly HashSet<Type> QueryWithoutTypes = new HashSet<Type>();

        public QueryWithout(params Type[] queryWithoutTypes)
        {
            foreach (var type in queryWithoutTypes)
            {
                var isComponent = type.GetInterfaces().Contains(typeof(IComponent));

                if (!isComponent)
                {
                    throw new IllegalReadTypeException("{0} must be a Component", type.Name);
                }

                this.QueryWithoutTypes.Add(type);
            }
        }
    }
}