function pickRandom(array) {
  return array[Math.floor(Math.random() * array.length)];
}

const colors = [
  { color: "black", emoji: "♣" },
  { color: "black", emoji: "♠" },
  { color: "red", emoji: "♥" },
  { color: "red", emoji: "♦" },
];
const numbers = "23456789JDAK";

const used_cards = [];

function* getCardGen() {
  while (true) {
    const color = pickRandom(colors);
    const number = pickRandom(numbers);
    const card = { ...color, number };
    if (used_cards.includes(getEmoji(card))) {
      continue;
    }
    used_cards.push(getEmoji(card));
    yield card;
  }
}

const cardGen = getCardGen();

function getCard() {
  return cardGen.next().value;
}

function getEmoji(card) {
  return /* HTML */ `
    <span class="card" style="background-color: white; color: ${card.color}"
      >${card.number}${card.emoji}</span
    >
  `;
}

module.exports = { getCard, getEmoji };