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

namespace DominionBase.Cards.Menagerie
{
	public class Enhance : Event
	{
		public Enhance()
			: base(Source.Menagerie, 3, Traits.Gainer | Traits.RemoveCurses | Traits.RemoveFromHand | Traits.Trasher)
		{
		}

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

			var trashOptions = player.Hand[c => !c.Category.HasFlag(Categories.Victory)];
			if (trashOptions.Any())
			{
				var choiceTrash = new Choice(Resource.ChooseToTrashOptional, this, trashOptions, ChoiceOutcome.Trash, player, minimum: 0);
				var resultTrash = player.MakeChoice(choiceTrash);

				if (resultTrash.Cards.Any())
				{
					var toTrash = resultTrash.Cards[0];
					player.Trash(this, player.RetrieveCardsFrom(DeckLocation.Hand, resultTrash.Cards));
					var trashedCardCost = player._Game.ComputeCost(toTrash);

					var gainableSupplies =
						new SupplyCollection(
							player._Game.Table.TableEntities.FindAll<ISupply>(
								supply =>
									supply.CanGain()
									&& supply.CurrentCost <= trashedCardCost + new Coin(2)));

					var choice = new Choice(Resource.GainCard, this, gainableSupplies, ChoiceOutcome.Gain, player, false);
					var result = player.MakeChoice(choice);
					if (result.Supply != null)
						player.Gain(result.Supply, this);
				}
			}
		}
	}
}