// This file (LoadableObjectSourceResourceSet.cs) is a part of the IBBoard.WarFoundry.API project and is copyright 2012 IBBoard
//
// The file and the library/program it is in are licensed and distributed, without warranty, under the GNU Affero GPL license, either version 3 of the License or (at your option) any later version. Please see COPYING for more information and the full license.
using System;
using System.Reflection;
using System.Collections.Generic;

namespace IBBoard.WarFoundry.API.Loading
{
	public class LoadableObjectSourceResourceSet : ILoadableObjectSource
	{
		private ICollection<ILoadableObject> loadables;
		private Assembly assm;
		private string[] resIDs;

		public LoadableObjectSourceResourceSet(Assembly assembly, params string[] resourceIDs)
		{
			assm = assembly;
			resIDs = resourceIDs;
		}

		public ICollection<ILoadableObject> GetLoadableObjects()
		{
			if (loadables == null)
			{
				loadables = new List<ILoadableObject>();

				foreach (string resourceID in resIDs)
				{
					loadables.Add(new LoadableResourceObject(assm, resourceID));
				}
			}

			return loadables;
		}

		public override bool Equals(object obj)
		{
			if (obj == null || !obj.GetType().Equals(GetType()))
			{
				return false;
			}

			LoadableObjectSourceResourceSet other = (LoadableObjectSourceResourceSet)obj;
			return this.assm == other.assm && Arrays.Difference(this.resIDs, other.resIDs).Length == 0;
		}

		public override int GetHashCode()
		{
			int hash = assm.GetHashCode();

			foreach (string resID in resIDs)
			{
				hash += resID.GetHashCode();
			}

			return hash;
		}
	}
}