#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;

namespace OpenRA.Traits.Activities
{
	public class FlyTimed : IActivity
	{
		public IActivity NextActivity { get; set; }
		int remainingTicks;
		int targetAltitude;

		public FlyTimed(int ticks, int targetAltitude) { remainingTicks = ticks; this.targetAltitude = targetAltitude; }

		public IActivity Tick(Actor self)
		{
			if (remainingTicks-- == 0) return NextActivity;
			FlyUtil.Fly(self, targetAltitude);
			return this;
		}

		public void Cancel(Actor self) { remainingTicks = 0; NextActivity = null; }
	}

	public class FlyOffMap : IActivity
	{
		public IActivity NextActivity { get; set; }
		readonly int targetAltitude;
		bool isCanceled;

		public FlyOffMap(int targetAltitude) { this.targetAltitude = targetAltitude; }
		
		public IActivity Tick(Actor self)
		{
			if (isCanceled || !self.World.Map.IsInMap(self.Location)) return NextActivity;
			FlyUtil.Fly(self, targetAltitude);
			return this;
		}

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

}