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

namespace DominionBase.Cards.Nocturne
{
	public class Tracker : Fate
	{
		private CardGainedEventHandler _cardGainedEventHandler;

		public Tracker()
			: base(Categories.Action, Location.Kingdom, Traits.ConditionalBenefit | Traits.PlusCoin | Traits.ReactToGain | Traits.Terminal)
		{
			BaseCost = new Cost(2);
			Benefit.Currency.Coin.Value = 1;
		}

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

			for (var i = 0; i < game.Players.Count; i++)
			{
				Card card = new Pouch();
				game.Table.Copper.AddTo(card);
				card.SetupCard(game);
			}
		}

		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 -= _cardGainedEventHandler;
			_cardGainedEventHandler = null;
		}

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

			var supply = (IBoonSupply)player._Game.Table.SpecialPiles[TypeClass.Boons];
			supply.TurnOverNextAndReceive(player);
		}

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

			if (location == DeckLocation.InPlay)
			{
				if (_cardGainedEventHandler != null)
					player.CardGained -= _cardGainedEventHandler;

				_cardGainedEventHandler = new CardGainedEventHandler(Player_CardGained);
				player.CardGained += _cardGainedEventHandler;
			}
		}

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

			// Already been cancelled -- don't need to process this one
			if (e.Cancelled || e.Resolvers.ContainsKey(key))
				return;

			e.Resolvers[key] = new CardGainResolver(player, this, "PutOnDeck", Resource.PutOnDeck, Player_Action, false);
		}

		internal void Player_Action(IPlayer player, ref Players.CardGainEventArgs e)
		{
			e.Cancelled = true;
			e.Location = DeckLocation.Deck;
			e.Position = DeckPosition.Top;

			e.HandledBy.Add(TypeClass.Tracker);
		}

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

			if (_cardGainedEventHandler != null)
				player.CardGained -= _cardGainedEventHandler;
			_cardGainedEventHandler = null;
		}
	}
}