INNER CODE UNIT · JavaScript

chooseWeightedCard

Sisyphe42/ReignsAgent · packages/core/src/index.js:561

function chooseWeightedCard(cards, state, rng) {
  const weighted = cards.map((card) => ({
    card,
    weight: Math.max(0, (card.weight ?? 1) + (state.cardWeights[card.id] ?? 0))
  }));
  const total = weighted.reduce((sum, entry) => sum + entry.weight, 0);

  if (total <= 0) {
    return cards[0];
  }

  let cursor = rng() * total;
  for (const entry of weighted) {
    cursor -= entry.weight;
    if (cursor < 0) {
      return entry.card;
    }
  }

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