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

namespace Encompass
{
    public class WritesPending : Attribute
    {
        public readonly HashSet<Type> writePendingTypes = new HashSet<Type>();

        public WritesPending(params Type[] writePendingTypes)
        {
            foreach (var writePendingType in writePendingTypes)
            {
                var isComponent = writePendingType.GetInterfaces().Contains(typeof(IComponent));
                if (!isComponent)
                {
                    throw new IllegalWritePendingTypeException("{0} must be a Component", writePendingType.Name);
                }

                this.writePendingTypes.Add(writePendingType);
            }
        }
    }
}