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

namespace DominionBase.Cards.Renaissance
{
	public delegate void BorderGuardRevealEventHandler(object sender, BorderGuardRevealEventArgs e);

	public class BorderGuard : Card
	{
		public event BorderGuardRevealEventHandler BorderGuardRevealing;

		public BorderGuard()
			: base(Categories.Action, Source.Renaissance, Location.Kingdom, Traits.Discard | Traits.PlusAction | Traits.PlusCard)
		{
			BaseCost = new Cost(2);
			Benefit.Actions = 1;
		}

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

			var bgreArgs = new BorderGuardRevealEventArgs(2);
			BorderGuardRevealing?.Invoke(this, bgreArgs);

			var cardsRevealed = player.Draw(bgreArgs.CardsToReveal, DeckLocation.Revealed);

			var allActions = cardsRevealed.Count == bgreArgs.CardsToReveal && cardsRevealed.All(c => c.Category.HasFlag(Categories.Action));

			var handChoice = new Choice("Choose a card to put into your hand", this, cardsRevealed, ChoiceOutcome.Select, player);
			var handResult = player.MakeChoice(handChoice);
			if (handResult.Cards.Any())
			{
				cardsRevealed.Remove(handResult.Cards[0]);
				var rc = player.RetrieveCardsFrom(DeckLocation.Revealed, c => c == handResult.Cards[0]);
				player.AddCardsToHand(rc);
			}

			player.DiscardRevealed();

			if (allActions)
			{
				var choiceOption = new Choice(Resource.ChooseOne, this, this,
					new List<string> { Resource.TakeLantern, Resource.TakeHorn },
					player, minimum: 1, maximum: 1);
				var resultOption = player.MakeChoice(choiceOption);

				var optionChosen = resultOption.Options.FirstOrDefault();
				if (optionChosen == Resource.TakeLantern)
					player.Take(TypeClass.Lantern);

				else if (optionChosen == Resource.TakeHorn)
					player.Take(TypeClass.Horn);
			}
		}
	}

	public class BorderGuardRevealEventArgs : EventArgs
	{
		public int CardsToReveal { get; set; }

		public BorderGuardRevealEventArgs(int cardsToReveal)
		{
			CardsToReveal = cardsToReveal;
		}
	}
}