using DominionBase.Enums;
using DominionBase.Players;
using System.Collections.Generic;
using System.Diagnostics.Contracts;

namespace DominionBase.Cards.Menagerie
{
	public class WayOfTheChameleon : Way
	{
		private readonly List<Card> cards = new List<Card>();

		public WayOfTheChameleon()
			: base(Source.Menagerie, Traits.ConditionalBenefit | Traits.Terminal)
		{
		}

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

			cards.Add(playedCard);
			player.BenefitReceiving += Player_BenefitReceiving;
			playedCard.FollowInstructions(player);
			player.BenefitReceiving -= Player_BenefitReceiving;
			cards.Remove(playedCard);
		}

		private void Player_BenefitReceiving(object sender, BenefitReceiveEventArgs e)
		{
			if (e.CardSource == null || !(e.CardSource is Card) || !cards.Contains((Card)e.CardSource))
				return;

			// Swap +Cards and +Coins
			var plusCards = e.Benefit.Cards;
			var plusCoins = e.Benefit.Currency.Coin.Value;
			if (plusCards > 0)
			{
				e.Player._Game.SendMessage(e.Player, this, "ConvertCardsToCoins", plusCards);
				e.Benefit.Currency.Coin.Value += plusCards;
				e.Benefit.Cards -= plusCards;
			}
			if (plusCoins > 0)
			{
				e.Player._Game.SendMessage(e.Player, this, "ConvertCoinsToCards", plusCoins);
				e.Benefit.Cards += plusCoins;
				e.Benefit.Currency.Coin.Value -= plusCoins;
			}
		}
	}
}