using DominionBase.Enums;
using System.Diagnostics.Contracts;

namespace DominionBase.Cards.Nocturne
{
	public class Skulk : Doom
	{
		public Skulk()
			: base(Categories.Action | Categories.Attack, Location.Kingdom, Traits.AffectOthers | Traits.Gainer | Traits.PlusBuy | Traits.ReactToGain | Traits.Terminal)
		{
			BaseCost = new Cost(4);
			Benefit.Buys = 1;
		}

		public override void SetupCard(IGame game)
		{
			Contract.Requires(game != null, "game cannot be null");
			base.SetupCard(game);

			foreach (var player in game.Players)
				player.CardGained += Player_CardGained;
		}

		public override void TearDown(IGame game)
		{
			Contract.Requires(game != null, "game cannot be null");
			base.TearDown(game);

			foreach (var player in game.Players)
				player.CardGained -= Player_CardGained;
		}

		private void Player_CardGained(object sender, Players.CardGainEventArgs e)
		{
			var player = sender as IPlayer;
			var key = TypeClass.Skulk.ToString();

			// This is not the card you are looking for
			if (e.Card != this || e.Resolvers.ContainsKey(key) || e.HandledBy.Contains(this))
				return;

			e.Resolvers[key] = new Players.CardGainResolver(player, this, "GainGold", "Gain a Gold", Player_GainSkulk, true);
		}

		internal void Player_GainSkulk(IPlayer player, ref Players.CardGainEventArgs e)
		{
			player.Gain(player._Game.Table.Gold, this);

			e.HandledBy.Add(this);
		}

		public override void FollowInstructions(IPlayer player)
		{
			Contract.Requires(player != null, "player cannot be null");
			base.FollowInstructions(player);

			var hexPile = (IHexSupply)player._Game.Table.SpecialPiles[TypeClass.Hexes];
			var hexTurnedOver = hexPile.TurnOverNext(player);

			var enumerator = player._Game.GetPlayersStartingWithEnumerator(player);
			enumerator.MoveNext();
			while (enumerator.MoveNext())
			{
				var attackee = enumerator.Current;
				// Skip if the attack is blocked (Moat, Lighthouse, etc.)
				if (IsAttackBlocked[attackee])
					continue;

				if (hexTurnedOver)
					((IHex)hexPile.TopDiscard).Receive(attackee);
			}
		}
	}
}