private (int player, IEnumerable <int> cards) SubGame(IEnumerable <int> player1, IEnumerable <int> player2, bool subGames)
{
var decks = new Decks();
var cards1 = new Queue <int>(player1);
var cards2 = new Queue <int>(player2);
while (cards1.Count != 0 && cards2.Count != 0)
{
if (decks.HasPlayed(cards1, cards2))
{
return(1, cards1);
}
var c1 = cards1.Dequeue();
var c2 = cards2.Dequeue();
int winner;
if (subGames && cards1.Count >= c1 && cards2.Count >= c2)
{
winner = SubGame(cards1.Take(c1), cards2.Take(c2), subGames).player;
}
else
{
winner = c1 > c2 ? 1 : 2;
}
if (winner == 1)
{
cards1.Enqueue(c1);
cards1.Enqueue(c2);
}
else
{
cards2.Enqueue(c2);
cards2.Enqueue(c1);
}
}
return(cards1.Count > 0 ? (1, cards1) : (2, cards2));
}