#region Copyright & License Information
/*
 * Copyright 2007-2016 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, either version 3 of
 * the License, or (at your option) any later version. For more
 * information, see COPYING.
 */
#endregion

using System.Collections.Generic;
using OpenRA.Mods.Common.Traits;
using OpenRA.Traits;

namespace OpenRA.Mods.Common.Warheads
{
	public class GrantExternalConditionWarhead : Warhead
	{
		[FieldLoader.Require]
		[Desc("The condition to apply. Must be included in the target actor's ExternalConditions list.")]
		public readonly string Condition = null;

		[Desc("Duration of the condition (in ticks). Set to 0 for a permanent condition.")]
		public readonly int Duration = 0;

		public readonly WDist Range = WDist.FromCells(1);

		public override void DoImpact(Target target, Actor firedBy, IEnumerable<int> damageModifiers)
		{
			var actors = target.Type == TargetType.Actor ? new[] { target.Actor } :
				firedBy.World.FindActorsInCircle(target.CenterPosition, Range);

			foreach (var a in actors)
			{
				if (!IsValidAgainst(a, firedBy))
					continue;

				var um = a.TraitOrDefault<ConditionManager>();

				// Condition token is ignored because we never revoke this condition.
				if (um != null && um.AcceptsExternalCondition(a, Condition))
					um.GrantCondition(a, Condition, true, Duration);
			}
		}
	}
}