using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;

namespace DominionBase.Cards
{
	public class CardMovement
	{
	    public Card Card { get; }

	    public Players.DeckLocation CurrentLocation { get; }

	    public Players.DeckLocation Destination { get; set; }

	    public Piles.DeckPosition DestinationDeckPosition { get; set; } = Piles.DeckPosition.Automatic;

	    public CardMovement(Card card, Players.DeckLocation currentLocation, Players.DeckLocation destination)
		{
			Card = card;
			CurrentLocation = currentLocation;
			Destination = destination;
		}

		public override string ToString()
		{
			return $"Moving {Card}: {CurrentLocation} -> {Destination} ({DestinationDeckPosition})";
		}
	}

	public class CardMovementCollection : List<CardMovement>
	{
		public CardMovementCollection() { }
		public CardMovementCollection(int capacity) : base(capacity) { }
		public CardMovementCollection(IEnumerable<CardMovement> collection) : base(collection) { }
		public CardMovementCollection(Piles.CardPile pile, Players.DeckLocation currentLocation, Players.DeckLocation destination)
		{
			AddRange(pile, c => true, currentLocation, destination);
		}

		public CardMovementCollection(Piles.CardPile pile, Predicate<Card> predicate, Players.DeckLocation currentLocation, Players.DeckLocation destination)
		{
			AddRange(pile, predicate, currentLocation, destination);
		}

		public void AddRange(Piles.CardPile pile, Players.DeckLocation currentLocation, Players.DeckLocation destination)
		{
			AddRange(pile, c => true, currentLocation, destination);
		}

		public void AddRange(Piles.CardPile pile, Predicate<Card> predicate, Players.DeckLocation currentLocation, Players.DeckLocation destination)
		{
			Contract.Requires(pile != null, "pile cannot be null");
			foreach (var card in pile[predicate])
				Add(new CardMovement(card, currentLocation, destination));
		}

		public bool Contains(Card card)
		{
			return Exists(cm => cm.Card == card);
		}
		public CardMovement this[Card card] { get { return Find(cm => cm.Card == card); } }

		public void MoveToEnd(Card card)
		{
			if (!Contains(card))
				throw new KeyNotFoundException($"Cannot find card {card}");

			var cm = this[card];
			Remove(cm);
			Add(cm);
		}
	}
}