import java.util.Random;

public class Deck{
    private Card[] cards = new Card[52];

    //Constructor
    public Deck(){
        int i = 0;
        for (short j=0; j<4; j++){
            for (short k=0; k<13;k++){
                cards[i++] = new Card(k, j);
            }
        }
    }

    // Print entire deck in order
    protected void printDeck(){
        for(int i=0; i<cards.length;i++){
            System.out.println(i+1 + ": " + cards[i].printCard());
        }
        System.out.println("\n");
    }

    // Find card in deck in a linear fashion
    // Use this method if deck is shuffled/random
    protected int findCard(Card card){
        for (int i=0;i<52;i++){
            if (Card.sameCard(cards[i], card)){
                return i;
            }
        }
        return -1;
    }

    //return specified card from deck
    protected Card getCard(int cardNum){
        return cards[cardNum];
    }

    protected void shuffle(){
        int length = cards.length;
        Random random = new Random();
        //random.nextInt();
        for (int i=0;i<length;i++){
            int change = i + random.nextInt(length-i);
            swapCards(i, change);
        }
    }

    protected void cutDeck(){
        Deck tempDeck = new Deck();
        Random random = new Random();
        int cutNum = random.nextInt(52);
        for (int i=0;i<cutNum;i++){
            tempDeck.cards[i] = this.cards[52-cutNum+i];
        }
        for (int j=0;j<52-cutNum;j++){
            tempDeck.cards[j+cutNum] = this.cards[j];
        }
        this.cards = tempDeck.cards;
    }

    // Swap cards in array to 'shuffle' the deck.
    private void swapCards(int i, int change){
        Card temp = cards[i];
        cards[i] = cards[change];
        cards[change] = temp;
    }
}