#region Copyright & License Information
/*
 * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
 * This file is part of OpenRA.
 * 
 *  OpenRA is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 * 
 *  OpenRA 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 General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License
 *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System.Linq;

namespace OpenRA.Traits.Activities
{
	public class Rearm : IActivity
	{
		public IActivity NextActivity { get; set; }
		bool isCanceled;
		int remainingTicks = ticksPerPip;

		const int ticksPerPip = 25 * 2;

		public IActivity Tick(Actor self)
		{
			if (isCanceled) return NextActivity;
			var limitedAmmo = self.traits.GetOrDefault<LimitedAmmo>();
			if (limitedAmmo == null) return NextActivity;

			if (--remainingTicks == 0)
			{
				if (!limitedAmmo.GiveAmmo()) return NextActivity;

				var hostBuilding = self.World.FindUnits(self.CenterLocation, self.CenterLocation)
					.FirstOrDefault(a => a.traits.Contains<RenderBuilding>());

				if (hostBuilding != null)
					hostBuilding.traits.Get<RenderBuilding>().PlayCustomAnim(hostBuilding, "active");

				remainingTicks = ticksPerPip;
			}

			return this;
		}

		public void Cancel(Actor self) { isCanceled = true; NextActivity = null; }
	}
}