#region Copyright & License Information
/*
 * Copyright 2007-2014 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.Collections.Generic;
using System.Linq;
using OpenRA.Effects;
using OpenRA.GameRules;
using OpenRA.Traits;
using OpenRA.Mods.RA.Effects;

namespace OpenRA.Mods.RA
{
	public class CreateEffectWarhead : Warhead
	{
		[Desc("Size of the area. An explosion animation will be created in each tile.", "Provide 2 values for a ring effect (outer/inner).")]
		public readonly int[] Size = { 0, 0 };

		[Desc("Explosion effect to use.")]
		public readonly string Explosion = null;

		[Desc("Palette to use for explosion effect.")]
		public readonly string ExplosionPalette = "effect";

		[Desc("Explosion effect on hitting water (usually a splash).")]
		public readonly string WaterExplosion = null;

		[Desc("Palette to use for effect on hitting water (usually a splash).")]
		public readonly string WaterExplosionPalette = "effect";

		[Desc("Sound to play on impact.")]
		public readonly string ImpactSound = null;

		[Desc("Sound to play on impact with water")]
		public readonly string WaterImpactSound = null;

		public override void DoImpact(Target target, Actor firedBy, float firepowerModifier)
		{
			DoImpact(target.CenterPosition, firedBy, firepowerModifier);
		}

		public void DoImpact(WPos pos, Actor firedBy, float firepowerModifier)
		{
			var world = firedBy.World;
			var targetTile = world.Map.CellContaining(pos);

			if (!world.Map.Contains(targetTile))
				return;

			var minRange = (Size.Length > 1 && Size[1] > 0) ? Size[1] : 0;
			var allCells = world.Map.FindTilesInAnnulus(targetTile, minRange, Size[0]);

			// Draw the effects
			foreach (var currentCell in allCells)
			{
				var currentPos = world.Map.CenterOfCell(currentCell);
				// TODO: #5937 should go in here after rebase.
				var isWater = currentPos.Z <= 0 && world.Map.GetTerrainInfo(currentCell).IsWater;
				var explosionType = isWater ? WaterExplosion : Explosion;
				var explosionTypePalette = isWater ? WaterExplosionPalette : ExplosionPalette;

				if (explosionType != null)
					world.AddFrameEndTask(w => w.Add(new Explosion(w, currentPos, explosionType, explosionTypePalette)));
			}

			string sound = null;

			var isTargetWater = pos.Z <= 0 && world.Map.GetTerrainInfo(targetTile).IsWater;
			if (isTargetWater && WaterImpactSound != null)
				sound = WaterImpactSound;

			if (ImpactSound != null)
				sound = ImpactSound;

			Sound.Play(sound, pos);
		}

		public override float EffectivenessAgainst(ActorInfo ai) { return 1f; }
	}
}