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

namespace DominionBase.Cards.Renaissance
{
	public class GuildHall : Project
	{
		public GuildHall()
			: base(Source.Renaissance, 5, Traits.Component | Traits.ReactToGain | Traits.PlusCoffer)
		{
		}

		public override void TearDown(IGame game)
		{
			foreach (var cgp in PurchasedPlayers)
				cgp.CardGained -= Player_CardGained;
			base.TearDown(game);
		}

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

			var cgp = PurchasedPlayers.Find(p => p == player);
			if (cgp != null)
				cgp.CardGained -= Player_CardGained;
			else
				PurchasedPlayers.Add(player);
			player.CardGained += Player_CardGained;
		}

		private void Player_CardGained(object sender, CardGainEventArgs e)
		{
			var player = sender as IPlayer;
			var key = ToString();
			if (e.HandledBy.Contains(TypeClass.GuildHall)
				|| !e.Card.Category.HasFlag(Categories.Treasure))
				return;

			if (!e.Resolvers.ContainsKey(key))
				e.Resolvers[key] = new CardGainResolver(player, this, "ResolveCard", $"Resolve {this}", Player_Action, true);
		}

		internal void Player_Action(IPlayer player, ref CardGainEventArgs e)
		{
			player.ReceiveBenefit(this, new CardBenefit { Coffers = 1 });

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