(function() {
    var cfg = document.getElementById('page-purchase-cfg');
    if (!cfg) return;
    var itemId = cfg.dataset.itemId;
    var pwywEnabled = cfg.dataset.pwywEnabled === 'true';

    window.guestCheckout = function() {
        const btn = document.getElementById('guest-checkout-btn');
        btn.disabled = true;
        btn.textContent = 'Redirecting...';

        const body = {};
        if (pwywEnabled) {
            const amount = parseFloat(document.getElementById('guest_pwyw_amount').value);
            body.amount_cents = Math.round(amount * 100);
        }

        fetch('/api/checkout/guest/' + itemId, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(body),
        })
        .then(r => r.json())
        .then(data => {
            if (data.checkout_url) {
                window.location.href = data.checkout_url;
            } else {
                btn.disabled = false;
                btn.textContent = 'Buy Now';
                alert(data.error || 'Something went wrong');
            }
        })
        .catch(() => {
            btn.disabled = false;
            btn.textContent = 'Buy Now';
            alert('Something went wrong. Please try again.');
        });
    };
})();