// UnitRequirementMinNumber.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
{
	public class UnitRequirementMinNumber : UnitRequirement
	{
		private int minUnitCount;
		
		public UnitRequirementMinNumber(UnitType type, int minNumber) : base(type)
		{
			minUnitCount = minNumber;
		}
		
		public override string Description
		{
			get { return "You must include at least "+minUnitCount+" "+unitType.Name+" units in an army"; }
		}
		
		protected override AbstractFailedRequirement CanAddToArmy(Army army, UnitType type)
		{
			return null;
		}

		protected override AbstractFailedRequirement CanRemoveFromArmy (Army army, UnitType type)
		{
			FailedUnitRequirement failed = null;
			
			if (army.GetUnitTypeCount(type) <= minUnitCount)
			{
				failed = new FailedUnitRequirement(this);
			}
			
			return failed;
		}
	}
}