using OpenRa.Game.GameRules;
using System.Collections.Generic;
using System.Linq;

namespace OpenRa.Game.Traits
{
    class ChronoshiftDeploy : IOrder, ISpeedModifier, ITick, IPips
    {
        public ChronoshiftDeploy(Actor self) { }
        bool chronoshiftActive = false; // Is the chronoshift engine active?
        int remainingChargeTime = 0; // How long until we can chronoshift again?
        int chargeTime = (int)(Rules.Aftermath.ChronoTankDuration * 60 * 25); // How long between shifts?

        public void Tick(Actor self)
        {
            if (remainingChargeTime > 0)
                remainingChargeTime--;
        }

        public Order IssueOrder(Actor self, int2 xy, MouseInput mi, Actor underCursor)
        {
            if (mi.Button == MouseButton.Left) return null;

            if (chronoshiftActive)
				return new Order("Chronoshift", self, null, xy, null);

            else if (xy == self.Location && remainingChargeTime <= 0)
				return new Order("Deploy", self, null, int2.Zero, null);
 
            return null;
        }

        public void ResolveOrder(Actor self, Order order)
        {
			var movement = self.traits.WithInterface<IMovement>().FirstOrDefault();
            if (order.OrderString == "Deploy" && remainingChargeTime <= 0)
            {
                chronoshiftActive = true;
                self.CancelActivity();
            }

			if (order.OrderString == "Chronoshift" && movement.CanEnterCell(order.TargetLocation))
            {
				self.CancelActivity();
           		self.QueueActivity(new Activities.Teleport(order.TargetLocation));
                Sound.Play("chrotnk1.aud");
                chronoshiftActive = false;
                remainingChargeTime = chargeTime;
            }
        }
        
        public float GetSpeedModifier()
        {
            return chronoshiftActive ? 0f : 1f;
        }
		
		// Display 5 pips indicating the current charge status
		public IEnumerable<PipType> GetPips()
		{
			const int numPips = 5;
			for (int i = 0; i < numPips; i++)
			{
				if ((1 - remainingChargeTime * 1.0f / chargeTime) * numPips < i + 1)
				{
					yield return PipType.Transparent;
					continue;
				}
					
				switch (i)
				{
					case 0:
					case 1:
						yield return PipType.Red;
						break;
					case 2:
					case 3:
						yield return PipType.Yellow;
						break;
					case 4:
						yield return PipType.Green;
						break;
				}
			}
		}
    }
}