// AbstractUnitRequirement.cs
//
//  Copyright (C) 2008 IBBoard
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License version 2.1 of the License as published by the Free
// Software Foundation.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
//
//

using System;
using IBBoard.WarFoundry.API.Objects;

namespace IBBoard.WarFoundry.API.Requirements
{
	/// <summary>
	/// Base abstract class for all requirements related to adding/removing something from a Unit (e.g. adding equipment or abilities)
	/// </summary>
	public abstract class AbstractUnitRequirement : AbstractRequirement
	{		
		protected abstract AbstractFailedRequirement CanAddToUnit(Unit unit);
		protected abstract AbstractFailedRequirement CanRemoveFromUnit(Unit unit);
		
		public override AbstractFailedRequirement CanAddToWarFoundryObject (WarFoundryObject obj)
		{
			AbstractFailedRequirement fail = null;
			
			if (obj is Unit)
			{
				fail = CanAddToUnit((Unit)obj);
			}
			else
			{
				fail = new FailedRequirement(this);
			}
			
			return fail;
		}
		
		public override AbstractFailedRequirement CanRemoveFromWarFoundryObject (WarFoundryObject obj)
		{
			AbstractFailedRequirement fail = null;
			
			if (obj is Unit)
			{
				fail = CanRemoveFromUnit((Unit)obj);
			}
			else
			{
				fail = new FailedRequirement(this);
			}
			
			return fail;
		}
	}
}