let num1, num2;
let correctAnswer;
let score = 0;
let currentMode = "";

function setMode(mode) {
    currentMode = mode;
    generateQuestion();
}

function generateQuestion() {
    num1 = Math.floor(Math.random() * 10);
    num2 = Math.floor(Math.random() * 10);

    if (currentMode === "addition") {
        correctAnswer = num1 + num2;
        document.getElementById("question").textContent =
            `${num1} + ${num2} = ?`;
    }

    if (currentMode === "subtraktion") {
        correctAnswer = num1 - num2;
        document.getElementById("question").textContent =
            `${num1} - ${num2} = ?`;
    }

    if (currentMode === "multiplikation") {
        correctAnswer = num1 * num2;
        document.getElementById("question").textContent =
            `${num1} × ${num2} = ?`;
    }

    document.getElementById("answer").value = "";
}

function checkAnswer() {
    let userAnswer = Number(document.getElementById("answer").value);
    let resultText = document.getElementById("result");

    if (userAnswer === correctAnswer) {
        resultText.textContent = 
            "✅ Richtig! Sehr gut! Die Antwort ist " + correctAnswer;
        score++;
        document.getElementById("score").textContent = score;
    } else {
        resultText.textContent =
            "❌ Falsch! Die richtige Antwort ist " + correctAnswer;
    }

    // 2 Sekunden warten, dann neue Frage
    setTimeout(generateQuestion, 2000);
}