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

namespace DominionBase.Cards.Menagerie
{
	public class BlackCat : Card
	{
		public BlackCat()
			: base(Categories.Action | Categories.Attack | Categories.Reaction, Source.Menagerie, Location.Kingdom, Traits.NetCardDraw | Traits.PlusCard | Traits.PlusCurses | Traits.ReactToGain | Traits.Terminal)
		{
			BaseCost = new Cost(2);
			Benefit.Cards = 2;
		}

		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;
		}

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

			// If it's not our turn, Curse everyone else
			if (player._Game.ActivePlayer != 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;

					attackee.Gain(player._Game.Table.Curse, this);
				}
			}
		}

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

			if (location == DeckLocation.Hand)
			{
				var enumerator = player._Game.GetPlayersStartingWithEnumerator(player);
				while (enumerator.MoveNext())
				{
					enumerator.Current.CardGained -= Player_CardGained;
					if (enumerator.Current != player)
						enumerator.Current.CardGained += Player_CardGained;
				}
			}
		}

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

			// Already been cancelled -- don't need to process this one
			if (e.Cancelled || e.Resolvers.ContainsKey(key) || player == Owner
				|| !e.Card.Category.HasFlag(Categories.Victory) || e.HandledBy.Contains(this))
				return;

			// This needs to be "Owner" & not "sender"/"player" because it's in reaction to
			// someone else gaining the Victory card
			e.Resolvers[key] = new CardGainResolver(Owner, this, "PlayCard", Resource.PlayCard.Replace("{card}", PhysicalCard.ToString()), Player_Action, false);
		}

		internal void Player_Action(IPlayer player, ref CardGainEventArgs e)
		{
			if (player.Hand.Contains(PhysicalCard))
			{
				player.Actions++;
				player.PlayCard(PhysicalCard, DeckLocation.InPlay);
				e.HandledBy.Add(this);
			}
		}

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

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