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

namespace DominionBase.Cards.Renaissance
{
	public class Ducat : Card
	{
		public Ducat()
			: base(Categories.Treasure, Source.Renaissance, Location.Kingdom, Traits.Component | Traits.PlusBuy | Traits.PlusCoffer | Traits.Trasher)
		{
			BaseCost = new Cost(2);
			Benefit.Coffers = 1;
			Benefit.Buys = 1;
			Benefit.Currency.Coin.SpecialDisplay = "0";
		}

		//protected override bool AllowUndo => true;

		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, CardGainEventArgs e)
		{
			var player = sender as IPlayer;
			var key = Type.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 CardGainResolver(player, this, "TrashCopper", "Trash a Copper from your hand", Player_GainDucat, true);
		}

		internal void Player_GainDucat(IPlayer player, ref CardGainEventArgs e)
		{
			var choiceTrash = new Choice("You may trash a Copper from your hand", this, player.Hand[Universal.TypeClass.Copper], ChoiceOutcome.Trash, player, minimum: 0);
			var resultTrash = player.MakeChoice(choiceTrash);
			if (resultTrash.Cards.Any())
				player.Trash(this, player.RetrieveCardsFrom(DeckLocation.Hand, resultTrash.Cards));


			e.HandledBy.Add(this);
		}
	}
}