engine.cpp

#include "engine.hpp"
#include <random>
#include <sstream>
#include <iomanip>

// Seeding of random number generator
namespace {
std::mt19937 mt{};
bool seeded{false};
void initRandom() {
	if (seeded)
		return;
	mt.seed(std::random_device{}());
	seeded = true;
}
}

namespace UI {
std::string displayScore(const std::vector<int>& hand, bool hidden) {
	int score{::calculateScore(hand)};
	std::ostringstream oss;
	oss << StaticText::score;

	if (hidden) {
		oss << "??";
	} else {
		oss << std::setw(2) << std::setfill('0') << score;
	}
	return oss.str();
}
}

int drawCard() {
	initRandom();
	std::uniform_int_distribution<> drawnCard{0, 12};
	int index{drawnCard(mt) % 13};
	return cards[index].cardValue;
}

int calculateScore(const std::vector<int>& hand) {
	int score{};
	int aceCount{};

	for (int card : hand) {
		score += card;
		if (card == 11)
		aceCount++;
	}
 
	// If 2 Aces are drawn --- Known Bug: Score can go down when you hit.
	// Plan to address it if I get to splitting and move away from ncurses
	while (score > 21 && aceCount > 0) {
		score -= 10;
		aceCount--;
	}
	return score;
}