bool HanabiState::MoveIsLegal()

in hanabi-learning-environment/hanabi_lib/hanabi_state.cc [169:222]

• 54 lines of code
• 15 McCabe index (conditional complexity)

bool HanabiState::MoveIsLegal(HanabiMove move) const {
  switch (move.MoveType()) {
    case HanabiMove::kDeal:
      if (cur_player_ != kChancePlayerId) {
        return false;
      }
      if (deck_.CardCount(move.Color(), move.Rank()) == 0) {
        return false;
      }
      break;
    case HanabiMove::kDiscard:
      if (InformationTokens() >= ParentGame()->MaxInformationTokens()) {
        return false;
      }
      if (move.CardIndex() >= hands_[cur_player_].Cards().size()) {
        return false;
      }
      break;
    case HanabiMove::kPlay:
      if (move.CardIndex() >= hands_[cur_player_].Cards().size()) {
        return false;
      }
      break;
    case HanabiMove::kRevealColor: {
      if (!HintingIsLegal(move)) {
        return false;
      }
      const auto& cards = HandByOffset(move.TargetOffset()).Cards();
      if (!std::any_of(cards.begin(), cards.end(),
                       [move](const HanabiCard& card) {
                         return card.Color() == move.Color();
                       })) {
        return false;
      }
      break;
    }
    case HanabiMove::kRevealRank: {
      if (!HintingIsLegal(move)) {
        return false;
      }
      const auto& cards = HandByOffset(move.TargetOffset()).Cards();
      if (!std::any_of(cards.begin(), cards.end(),
                       [move](const HanabiCard& card) {
                         return card.Rank() == move.Rank();
                       })) {
        return false;
      }
      break;
    }
    default:
      return false;
  }
  return true;
}