using DominionBase.Enums;
using System.Collections.Generic;
using System.Text;

namespace DominionBase
{
	public interface ICost : ICardBase
	{
		Traits Traits { get; }
		void Bought(IPlayer player);
		bool CanBuy(IPlayer player, Currency currency);
	}

	public class ICostCollection : List<ICost>
	{
		private readonly object _MyLock = new object();

		public ICostCollection() { }
		public ICostCollection(int capacity) : base(capacity) { }
		public ICostCollection(IEnumerable<ICost> collection) : base(collection) { }

		public string ToString(bool isCollated)
		{
			if (!isCollated)
				return ToString();

			StringBuilder sb = new StringBuilder();

			ICost _previousCard = null;
			int count = 0;
			lock (_MyLock)
			{
				for (int cIndex = 0; cIndex < Count; cIndex++)
				{
					if (_previousCard == null)
						_previousCard = this[cIndex];
					if (_previousCard.Type != this[cIndex].Type)
					{
						if (sb.Length != 0)
							sb.Append(", ");
						if (count > 1)
							sb.AppendFormat("{0}x {1}", count, _previousCard);
						else
							sb.Append(_previousCard);
						_previousCard = this[cIndex];
						count = 0;
					}
					count++;
				}
			}
			if (_previousCard != null)
			{
				if (sb.Length != 0)
					sb.Append(", ");
				if (count > 1)
					sb.AppendFormat("{0}x {1}", count, _previousCard);
				else
					sb.Append(_previousCard);
			}
			return sb.ToString();
		}
	}
}