<?php

class BJack {

	function destroySession() {

		/*
		 * Destroy the running session (logout)
		 */

		session_unset();
		session_destroy();
		session_write_close();
		setcookie(session_name(), "", 0, '/');
		session_regenerate_id(true);
	}

	function generateShuffledDeck() {

		/*
		 * shuffle() uses rand() and should satifsy our needs
		 */

		$deck = range(1, 312);
		shuffle($deck);
		return $deck;
	}

	function calculateChance($deck, $num, $score) {

		/*
		 * First let's see how many points are left to 21
		 */

		$pointsLeft = 21 - $score;

		/*
		 * Now we have to find out how many cards in our rest deck can break our neck
		 */

		$cardsToLose = 0;

		for ($i = $num; $i <= 312; $i++) {
			$card = $this->getCardInfo($deck[$i]);
			$cardValue = $card[0];

			if ($cardValue > $pointsLeft) {
				$cardsToLose++;
			}
		}

		/*
		 * Now we now how many cards are left and how many of them can make us feel like a looser
		 */

		$cardsLeft = 312 - $num;
		$chanceToLose = ($cardsToLose * 100) / $cardsLeft;

		return $chanceToLose;

	}

	function sixDecksWorkaround($card) {

		if ($card >= 53 && $card <= 104) {
			$card = $card - 52;
		} else if ($card >= 105 && $card <= 156) {
			$card = $card - 104;
		} else if ($card >= 157 && $card <= 208) {
			$card = $card - 156;
		} else if ($card >= 209 && $card <= 260) {
			$card = $card - 208;
		} else if ($card >= 261 && $card <= 312) {
			$card = $card - 260;
		}

		return $card;

	}

	function getCardInfo($card) {

		/*
		 * Information about our card
		 *
		 * Array [0] = Card points
		 * Array [1] = Card name
		 */
		
		$card = $this->sixDecksWorkaround($card);

		$data = array();

		if ($card == "1") {
			$data[] = 1;
			$data[] = "Ace of Clubs";
		} else if ($card == "2") {
			$data[] = 1;
			$data[] = "Ace of Spades";
		} else if ($card == "3") {
			$data[] = 1;
			$data[] = "Ace of Hearts";
		} else if ($card == "4") {
			$data[] = 1;
			$data[] = "Ace of Diamonds";
		} else if ($card == "5") {
			$data[] = 10;
			$data[] = "King of Clubs";
		} else if ($card == "6") {
			$data[] = 10;
			$data[] = "King of Spades";
		} else if ($card == "7") {
			$data[] = 10;
			$data[] = "King of Hearts";
		} else if ($card == "8") {
			$data[] = 10;
			$data[] = "King of Diamonds";
		} else if ($card == "9") {
			$data[] = 10;
			$data[] = "Queen of Clubs";
		} else if ($card == "10") {
			$data[] = 10;
			$data[] = "Queen of Spades";
		} else if ($card == "11") {
			$data[] = 10;
			$data[] = "Queen of Hearts";
		} else if ($card == "12") {
			$data[] = 10;
			$data[] = "Queen of Diamonds";
		} else if ($card == "13") {
			$data[] = 10;
			$data[] = "Jack of Clubs";
		} else if ($card == "14") {
			$data[] = 10;
			$data[] = "Jack of Spades";
		} else if ($card == "15") {
			$data[] = 10;
			$data[] = "Jack of Hearts";
		} else if ($card == "16") {
			$data[] = 10;
			$data[] = "Jack of Diamonds";
		} else if ($card == "17") {
			$data[] = 10;
			$data[] = "Ten of Clubs";
		} else if ($card == "18") {
			$data[] = 10;
			$data[] = "Ten of Spades";
		} else if ($card == "19") {
			$data[] = 10;
			$data[] = "Ten of Hearts";
		} else if ($card == "20") {
			$data[] = 10;
			$data[] = "Ten of Diamonds";
		} else if ($card == "21") {
			$data[] = 9;
			$data[] = "Nine of Clubs";
		} else if ($card == "22") {
			$data[] = 9;
			$data[] = "Nine of Spades";
		} else if ($card == "23") {
			$data[] = 9;
			$data[] = "Nine of Hearts";
		} else if ($card == "24") {
			$data[] = 9;
			$data[] = "Nine of Diamonds";
		} else if ($card == "25") {
			$data[] = 8;
			$data[] = "Eight of Clubs";
		} else if ($card == "26") {
			$data[] = 8;
			$data[] = "Eight of Spades";
		} else if ($card == "27") {
			$data[] = 8;
			$data[] = "Eight of Hearts";
		} else if ($card == "28") {
			$data[] = 8;
			$data[] = "Eight of Diamonds";
		} else if ($card == "29") {
			$data[] = 7;
			$data[] = "Seven of Clubs";
		} else if ($card == "30") {
			$data[] = 7;
			$data[] = "Seven of Spades";
		} else if ($card == "31") {
			$data[] = 7;
			$data[] = "Seven of Hearts";
		} else if ($card == "32") {
			$data[] = 7;
			$data[] = "Seven of Diamonds";
		} else if ($card == "33") {
			$data[] = 6;
			$data[] = "Six of Clubs";
		} else if ($card == "34") {
			$data[] = 6;
			$data[] = "Six of Spades";
		} else if ($card == "35") {
			$data[] = 6;
			$data[] = "Six of Hearts";
		} else if ($card == "36") {
			$data[] = 6;
			$data[] = "Six of Diamonds";
		} else if ($card == "37") {
			$data[] = 5;
			$data[] = "Five of Clubs";
		} else if ($card == "38") {
			$data[] = 5;
			$data[] = "Five of Spades";
		} else if ($card == "39") {
			$data[] = 5;
			$data[] = "Five of Hearts";
		} else if ($card == "40") {
			$data[] = 5;
			$data[] = "Five of Diamonds";
		} else if ($card == "41") {
			$data[] = 4;
			$data[] = "Four of Clubs";
		} else if ($card == "42") {
			$data[] = 4;
			$data[] = "Four of Spades";
		} else if ($card == "43") {
			$data[] = 4;
			$data[] = "Four of Hearts";
		} else if ($card == "44") {
			$data[] = 4;
			$data[] = "Four of Diamonds";
		} else if ($card == "45") {
			$data[] = 3;
			$data[] = "Three of Clubs";
		} else if ($card == "46") {
			$data[] = 4;
			$data[] = "Three of Spades";
		} else if ($card == "47") {
			$data[] = 4;
			$data[] = "Three of Hearts";
		} else if ($card == "48") {
			$data[] = 4;
			$data[] = "Three of Diamonds";
		} else if ($card == "49") {
			$data[] = 2;
			$data[] = "Two of Clubs";
		} else if ($card == "50") {
			$data[] = 2;
			$data[] = "Two of Spades";
		} else if ($card == "51") {
			$data[] = 2;
			$data[] = "Two of Hearts";
		} else if ($card == "52") {
			$data[] = 2;
			$data[] = "Two of Diamonds";
		} else {
			$data[] = 0;
			$data[] = "Unknown card";
		}

		return $data;
	}

}