const int DECK_SIZE = 52;
int deck[DECK_SIZE];

void setup() {
  Serial.begin(9600);
  randomSeed(analogRead(0));  // Use analog noise to seed RNG

  // Initialize the deck with values 0–51
  for (int i = 0; i < DECK_SIZE; i++) {
    deck[i] = i;
  }

  // Fisher–Yates Shuffle
  for (int i = DECK_SIZE - 1; i > 0; i--) {
    int j = random(0, i + 1);
    int temp = deck[i];
    deck[i] = deck[j];
    deck[j] = temp;
  }

  // Print the shuffled deck
  for (int i = 0; i < DECK_SIZE; i++) {
    printCard(deck[i]);
  }
}

void loop() {
  // Nothing to do in loop
}

// Optional: convert integer to card name
void printCard(int card) {
  const char* suits[] = {"Hearts", "Diamonds", "Clubs", "Spades"};
  const char* ranks[] = {"2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A"};
  
  int suit = card / 13;
  int rank = card % 13;

  Serial.print(ranks[rank]);
  Serial.print(" of ");
  Serial.println(suits[suit]);
}