// This file (UnitEquipmentRatioSelection.cs) is a part of the IBBoard.WarFoundry.API project and is copyright 2009 IBBoard
// 
// The file and the library/program it is in are licensed under the GNU LGPL license, either version 3 of the License or (at your option) any later version. Please see COPYING.LGPL for more information and the full license.

using System;

namespace IBBoard.WarFoundry.API.Objects
{	
	/// <summary>
	/// An object to hold the selection of a unit's equipment where the selection was made as a percentage or ratio
	/// of the total size of the unit
	/// </summary>
	public class UnitEquipmentRatioSelection : AbstractUnitEquipmentItemSelection
	{	
		public UnitEquipmentRatioSelection(Unit unit, UnitEquipmentItem item, double amount) : base(unit, item, amount)
		{
		}
		
		public UnitEquipmentRatioSelection(Unit unit, UnitEquipmentItem item) : base(unit, item, item.MinPercentage)
		{
		}
		
		public override double TotalCost
		{
			get
			{
				return CalculateAmount() * EquipmentItem.Cost;
			}
		}
					
		private double CalculateAmount()
		{
			double numberTaken = AmountTaken * EquipmentForUnit.Size;
			return (EquipmentItem.RoundNumberUp ? Math.Ceiling(numberTaken) : Math.Floor(numberTaken));
		}
		
		protected override bool IsValidValue (double newValue)
		{
			return (EquipmentItem.MinPercentage <= newValue) && (newValue <= EquipmentItem.MaxPercentage);
		}
	}
}