// Proses pembayaran dengan Tripay
function processPayment(productId, productName, productPrice) {
    var qty = document.getElementById('qty_' + productId).value;
    if(!qty || qty < 1) {
        alert('Masukkan jumlah pembelian!');
        return;
    }
    
    currentProductId = productId;
    currentQty = qty;
    currentPrice = productPrice;
    currentProductName = productName;
    
    var total = productPrice * qty;
    document.getElementById('pay_product_name').innerText = productName;
    document.getElementById('pay_quantity').innerText = qty;
    document.getElementById('pay_total').innerText = total.toLocaleString('id-ID');
    document.getElementById('pay_product_id').value = productId;
    document.getElementById('pay_qty_val').value = qty;
    document.getElementById('pay_price_val').value = productPrice;
    
    paymentModal.style.display = 'block';
}

function processPaymentSubmit() {
    var customerName = document.getElementById('pay_customer_name').value;
    var customerEmail = document.getElementById('pay_customer_email').value;
    var customerPhone = document.getElementById('pay_customer_phone').value;
    var paymentMethod = document.querySelector('input[name="payment_method"]:checked').value;
    
    if(!customerName || !customerPhone) {
        alert('Lengkapi data diri!');
        return;
    }
    
    var total = currentPrice * currentQty;
    var paymentMethodCode = '';
    
    // Mapping metode pembayaran ke kode Tripay [citation:6]
    switch(paymentMethod) {
        case 'bank_transfer':
            paymentMethodCode = 'BCAVA'; // BCA Virtual Account
            break;
        case 'gopay':
            paymentMethodCode = 'GOPAY';
            break;
        case 'shopeepay':
            paymentMethodCode = 'SHOPEEPAY';
            break;
        case 'qris':
            paymentMethodCode = 'QRIS';
            break;
        default:
            paymentMethodCode = 'QRIS';
    }
    
    // Loading state
    var submitBtn = event.target;
    var originalText = submitBtn.innerText;
    submitBtn.innerText = 'Memproses...';
    submitBtn.disabled = true;
    
    // Proses ke Tripay
    fetch('process-payment.php', {
        method: 'POST',
        headers: {'Content-Type': 'application/json'},
        body: JSON.stringify({
            product_id: currentProductId,
            product_name: currentProductName,
            quantity: currentQty,
            amount: total,
            customer_name: customerName,
            customer_email: customerEmail,
            customer_phone: customerPhone,
            payment_method: paymentMethodCode
        })
    })
    .then(response => response.json())
    .then(data => {
        if(data.success && data.payment_url) {
            // Redirect ke halaman pembayaran Tripay
            window.open(data.payment_url, '_blank');
            paymentModal.style.display = 'none';
            alert('Silakan selesaikan pembayaran Anda di halaman yang terbuka.');
            
            // Reset form
            document.getElementById('pay_customer_name').value = '';
            document.getElementById('pay_customer_email').value = '';
            document.getElementById('pay_customer_phone').value = '';
        } else {
            alert('Error: ' + (data.error || 'Gagal memproses pembayaran'));
        }
    })
    .catch(error => {
        console.error('Error:', error);
        alert('Terjadi kesalahan. Silakan coba lagi.');
    })
    .finally(() => {
        submitBtn.innerText = originalText;
        submitBtn.disabled = false;
    });
}