#region Copyright & License Information
/*
 * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
 * This file is part of OpenRA, which is free software. It is made
 * available to you under the terms of the GNU General Public License
 * as published by the Free Software Foundation. For more information,
 * see COPYING.
 */
#endregion

using System;
using System.Linq;
using OpenRA.Graphics;
using OpenRA.Traits;

namespace OpenRA.Mods.RA.Render
{
	class RenderUnitTurretedInfo : RenderUnitInfo, Requires<TurretedInfo>, Requires<AttackBaseInfo>
	{
		public override object Create(ActorInitializer init) { return new RenderUnitTurreted(init.self); }
	}

	class RenderUnitTurreted : RenderUnit
	{
		public RenderUnitTurreted(Actor self)
			: base(self)
		{
			var facing = self.Trait<IFacing>();
			var turreted = self.TraitsImplementing<Turreted>();

			var i = 0;
			foreach (var t in turreted)
			{
				var turret = t;

				var anim = new Animation(GetImage(self), () => turret.turretFacing);
				anim.Play("turret");

				anims.Add("turret_{0}".F(i++), new AnimationWithOffset(anim,
					() => turret.PxPosition(self, facing).ToFloat2() + RecoilOffset(self, turret), null));
			}
		}

		float2 RecoilOffset(Actor self, Turreted t)
		{
			var a = self.TraitsImplementing<Armament>()
					.OrderByDescending(w => w.Recoil)
					.FirstOrDefault(w => w.Info.Turret == t.info.Turret);
			if (a == null)
				return float2.Zero;

			return a.RecoilPxOffset(self, t.turretFacing).ToFloat2();
		}
	}
}