// Game state
const gameState = {
    currentCard: 0,
    sum: 0,
    cardValues: [1, 2, 4, 8, 16, 32],
};

// DOM elements
const welcomeScreen = document.getElementById('welcomeScreen');
const cardScreen = document.getElementById('cardScreen');
const analysisScreen = document.getElementById('analysisScreen');
const resultScreen = document.getElementById('resultScreen');

const startBtn = document.getElementById('startBtn');
const yesBtn = document.getElementById('yesBtn');
const noBtn = document.getElementById('noBtn');
const restartBtn = document.getElementById('restartBtn');

const cardNumber = document.getElementById('cardNumber');
const cardGrid = document.getElementById('cardGrid');
const statusMessage = document.getElementById('statusMessage');
const progressBar = document.getElementById('progressBar');
const resultNumber = document.getElementById('resultNumber');

// Card values and their corresponding binary values
const cardValues = [1, 2, 4, 8, 16, 32];

// Generate numbers for a specific card
function generateCardNumbers(cardValue) {
    const numbers = [];
    for (let n = 1; n <= 63; n++) {
        if ((n & cardValue) !== 0) {
            numbers.push(n);
        }
    }
    return numbers;
}

// Display a card
function displayCard(cardIndex) {
    const cardValue = cardValues[cardIndex];
    const numbers = generateCardNumbers(cardValue);

    cardNumber.textContent = `Card ${cardIndex + 1} of 6`;
    cardGrid.innerHTML = '';

    numbers.forEach((num) => {
        const numberDiv = document.createElement('div');
        numberDiv.className = 'card-number';
        numberDiv.textContent = num;
        cardGrid.appendChild(numberDiv);
    });
}

// Handle Yes response
function handleYes() {
    gameState.sum += gameState.cardValues[gameState.currentCard];
    nextCard();
}

// Handle No response
function handleNo() {
    nextCard();
}

// Move to the next card
function nextCard() {
    gameState.currentCard++;

    if (gameState.currentCard < 6) {
        displayCard(gameState.currentCard);
    } else {
        // Move to analysis screen
        showAnalysisScreen();
    }
}

// Show analysis screen with animations
function showAnalysisScreen() {
    switchScreen(analysisScreen);
    animateAnalysis();
}

// Animate the analysis screen
function animateAnalysis() {
    const messages = [
        'Reading signals…',
        'Matching pattern…',
        'Locking onto your thought…',
        'Decoding brainwaves…',
        'Final verification…',
    ];

    let messageIndex = 0;
    let progressValue = 0;

    // Cycle through messages
    const messageInterval = setInterval(() => {
        statusMessage.textContent = messages[messageIndex % messages.length];
        messageIndex++;
    }, 400);

    // Simulate progress
    const progressInterval = setInterval(() => {
        progressValue += Math.random() * 15;
        if (progressValue > 100) progressValue = 100;
        progressBar.style.width = progressValue + '%';

        if (progressValue >= 100) {
            clearInterval(progressInterval);
        }
    }, 200);

    // Reveal result after 2 seconds
    setTimeout(() => {
        clearInterval(messageInterval);
        clearInterval(progressInterval);
        revealResult();
    }, 2000);
}

// Reveal the result
function revealResult() {
    resultNumber.textContent = `Your number is ${gameState.sum}`;
    switchScreen(resultScreen);
}

// Switch between screens
function switchScreen(targetScreen) {
    document.querySelectorAll('.screen').forEach((screen) => {
        screen.classList.remove('active');
    });
    targetScreen.classList.add('active');
}

// Reset game
function resetGame() {
    gameState.currentCard = 0;
    gameState.sum = 0;
    switchScreen(welcomeScreen);
    progressBar.style.width = '0%';
}

// Event listeners
startBtn.addEventListener('click', () => {
    gameState.currentCard = 0;
    gameState.sum = 0;
    displayCard(0);
    switchScreen(cardScreen);
});

yesBtn.addEventListener('click', handleYes);
noBtn.addEventListener('click', handleNo);
restartBtn.addEventListener('click', resetGame);

// Initialize
window.addEventListener('load', () => {
    switchScreen(welcomeScreen);
});