using OpenRa.GameRules;
using OpenRa.Traits.Activities;
using System;

namespace OpenRa.Traits
{
	class TransformsOnDeployInfo : ITraitInfo
	{
		public readonly string TransformsInto = null;
		public readonly int[] Offset = null;
		public readonly int[] DeployDirections = new int[] {96};
		public readonly bool TransferHealthPercentage = true; // Set to false to transfer the absolute health
		public readonly string[] TransformSounds = null;
		public readonly string[] NoTransformSounds = null;
		
		public object Create(Actor self) { return new TransformsOnDeploy(self); }
	}

	class TransformsOnDeploy : IIssueOrder, IResolveOrder
	{
		public TransformsOnDeploy(Actor self) { }

		public Order IssueOrder(Actor self, int2 xy, MouseInput mi, Actor underCursor)
		{
			if (mi.Button == MouseButton.Right && self == underCursor)
				return new Order("DeployTransform", self);

			return null;
		}

		public void ResolveOrder( Actor self, Order order )
		{
			if (order.OrderString == "DeployTransform")
			{
				var info = self.Info.Traits.Get<TransformsOnDeployInfo>();
				
				var transInfo = Rules.Info[info.TransformsInto];
				
				if (transInfo.Traits.Contains<BuildingInfo>())
				{
					var bi = transInfo.Traits.Get<BuildingInfo>();
					if (!self.World.CanPlaceBuilding(info.TransformsInto, bi, self.Location + new int2(info.Offset[0], info.Offset[1]), self))
					{
						foreach (var s in info.NoTransformSounds)
							Sound.PlayToPlayer(self.Owner, s);
							
						return;
					}
					
				}
				self.CancelActivity();
				
				// Pick the closed deploy direction to turn to
				if (self.traits.Contains<Unit>())
				{
					var unit = self.traits.Get<Unit>();
				
					// TODO: Pick the closest deploy direction
					var bestDir = info.DeployDirections[0];
										
					self.QueueActivity(new Turn(bestDir));
				}
				
				self.QueueActivity(new TransformIntoActor(info.TransformsInto, new int2(info.Offset[0], info.Offset[1]), info.TransferHealthPercentage, info.TransformSounds));
			}
		}
	}
}