script.js

console.log("✅ script.js loaded");

// === QUIZ QUESTIONS ===
const questions = [
  { question: "What is Bitcoin?", answers: ["A blockchain", "A car", "A food", "A company"], correct: 0 },
  { question: "What does NFT stand for?", answers: ["Non-Fungible Token", "Network File Transfer", "New Financial Tool", "Node Functional Type"], correct: 0 },
  { question: "Which blockchain is known for smart contracts?", answers: ["Bitcoin", "Ethereum", "Dogecoin", "Ripple"], correct: 1 },
  { question: "What is the symbol for Ethereum?", answers: ["ETH", "ETC", "EHT", "EMT"], correct: 0 },
  { question: "Who created Bitcoin?", answers: ["Vitalik Buterin", "Satoshi Nakamoto", "Elon Musk", "CZ Binance"], correct: 1 },
];

let currentQuestion = 0;
let score = 0;

// === MAIN QUIZ LOGIC ===
function showQuestion() {
  // 🟣 Quiz görünür hale getir
  document.getElementById("quiz-box").style.display = "block";
  document.getElementById("start-btn").style.display = "none";
  document.getElementById("result-box").style.display = "none";

  // 🟣 Soru ve cevapları göster
  const questionData = questions[currentQuestion];
  const questionEl = document.getElementById("question");
  const answersEl = document.getElementById("answers");
  const nextBtn = document.getElementById("next-btn");

  questionEl.innerText = questionData.question;
  answersEl.innerHTML = "";

  questionData.answers.forEach((answer, i) => {
    const btn = document.createElement("button");
    btn.innerText = answer;
    btn.classList.add("answer-btn");
    btn.onclick = () => checkAnswer(i);
    answersEl.appendChild(btn);
  });

  nextBtn.style.display = "none";
}

// === CHECK ANSWER ===
function checkAnswer(index) {
  const questionData = questions[currentQuestion];
  const nextBtn = document.getElementById("next-btn");

  // ✅ Doğru cevapsa puan artır
  if (index === questionData.correct) {
    score++;
  }

  // ✅ Seçilen cevabı renklendir
  const buttons = document.querySelectorAll(".answer-btn");
  buttons.forEach((btn, i) => {
    if (i === questionData.correct) {
      btn.style.backgroundColor = "#4CAF50"; // yeşil
      btn.style.color = "#fff";
    } else if (i === index) {
      btn.style.backgroundColor = "#E74C3C"; // kırmızı
      btn.style.color = "#fff";
    }
    btn.disabled = true;
  });

  // ✅ “Next” butonunu göster
  nextBtn.style.display = "block";
}

// === NEXT QUESTION BUTTON ===
document.getElementById("next-btn").addEventListener("click", () => {
  currentQuestion++;

  if (currentQuestion < questions.length) {
    showQuestion();
  } else {
    showResults();
  }
});

// === SHOW RESULTS ===
function showResults() {
  document.getElementById("quiz-box").style.display = "none";
  document.getElementById("result-box").style.display = "block";
  document.getElementById("daily-score").innerText = score;

  // 💾 Sonuçları localStorage’a kaydet (isteğe bağlı)
  localStorage.setItem("lastScore", score);
  console.log("🎉 Quiz tamamlandı! Skor:", score);
}

// === EXPORT GLOBAL ===
window.showQuestion = showQuestion;