// This file (SetUnitEquipmentAmountCommand.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;
using IBBoard.Commands;
using IBBoard.Lang;
using IBBoard.WarFoundry.API.Objects;

namespace IBBoard.WarFoundry.API.Commands
{
	/// <summary>
	/// Summary description for SetUnitEquipmentAmountCommand.
	/// </summary>
	public class SetUnitEquipmentAmountCommand : Command
	{
		private Unit unit;
		private UnitEquipmentItem equip;
		private double newAmount;
		private double oldAmount;
		
		public SetUnitEquipmentAmountCommand(Unit unit, UnitEquipmentItem item, double amount)
		{
			this.unit = unit;
			equip = item;
			newAmount = amount;
			oldAmount = unit.GetEquipmentAmount(equip.ID);
		}

		public override bool CanExecute()
		{
			return (unit!=null && equip!=null);
		}

		public override string Description
		{
			get { return "Set "+StringManipulation.CutToLength(equip.Name, 20)+" amount for "+StringManipulation.CutToLength(unit.Name, 20)+" to "+UnitEquipmentItem.FormatEquipmentAmount(equip, newAmount); }
		}

		public override string UndoDescription
		{
			get { return "Set "+StringManipulation.CutToLength(equip.Name, 20)+" amount for "+StringManipulation.CutToLength(unit.Name, 20)+" to "+UnitEquipmentItem.FormatEquipmentAmount(equip, oldAmount); }
		}

		public override bool Execute()
		{
			this.Redo();
			return true;
		}

		public override void Redo()
		{
			if (equip.IsRatioLimit)
			{
				unit.SetEquipmentRatio(equip, newAmount);
			}
			else
			{
				unit.SetEquipmentAmount(equip, (int)newAmount);
			}
		}

		public override void Undo()
		{
			if (equip.IsRatioLimit)
			{
				unit.SetEquipmentRatio(equip, oldAmount);
			}
			else
			{
				unit.SetEquipmentAmount(equip, (int)oldAmount);
			}
		}

		public override string Name
		{
			get { return "Set equipment amount"; }
		}

		public UnitEquipmentItem EquipItem
		{
			get { return equip; }
		}

		public Unit Unit
		{
			get { return unit; }
		}
	}
}