document.addEventListener('DOMContentLoaded', () => {
    checkAuthStatus();
    initLogoutListener();
    initNavToggle();
});

function initNavToggle() {
    const navToggle = document.getElementById('nav-toggle');
    const navLinks = document.getElementById('nav-links');
    if (navToggle && navLinks) {
        navToggle.addEventListener('click', () => {
            navLinks.classList.toggle('active');
        });
    }
}

async function checkAuthStatus() {
    try {
        const res = await fetch('/auth/me');
        const data = await res.json();
        updateAuthUI(data.authenticated);
    } catch (err) {
        console.error("Auth check failed", err);
    }
}

function initLogoutListener() {
    const logoutLink = document.getElementById('link-logout');
    if (logoutLink) {
        logoutLink.addEventListener('click', async (e) => {
            e.preventDefault();
            try {
                if (window.SpotCrypto) window.SpotCrypto.clearSession();
                await fetch('/auth/logout', { method: 'POST' });
                window.location.reload();
            } catch (err) {
                console.error("Logout failed", err);
            }
        });
    }
}

function updateAuthUI(isLoggedIn) {
    const loginLink = document.getElementById('link-login');
    const logoutLink = document.getElementById('link-logout');

    if (isLoggedIn) {
        if (loginLink) loginLink.style.display = 'none';
        if (logoutLink) logoutLink.style.display = 'inline';
    } else {
        if (loginLink) loginLink.style.display = 'inline';
        if (logoutLink) logoutLink.style.display = 'none';
    }
}