Barter.cs

using System.Linq;
using Monad;
using Monad.Extensions;

namespace BuildCiv.Model.CardDifinition
{
    public readonly struct Barter : IPlayable
    {
        public int CivilCost => 1;

        public bool IsPlayable(ITable table)
            => table.Hand.Cards.Count() > 0;
        
        ContState<ITable, Unit> IPlayable.Play()
            =>
            from _dispose in (
                from disposed in HandEffect.RequestSelection(1)
                from _ in HandEffect.Dispose(disposed).Lift()
                select _
            ).ToTable()
            from _draw in (
                from drawed in TableEffect.Draw(2)
                from _ in HandEffect.Add(drawed).ToTable()
                select _    
            ).Lift()
            select Unit.Default;
    }
}