// 1. Gold Rate Fetching (Live API se)
$marketRate = fetchGoldRate(); // API Call

// 2. Aapka Pricing Formula
function calculateFinalPrice($rate, $weight) {
    $making = $rate * 0.12; // 12% Making
    $gst = ($rate + $making) * 0.03; // 3% GST
    $discount = 500; // Fixed Discount
    return ($rate + $making + $gst) - $discount;
}

// 3. Gemini AI Integration
$aiResponse = callGeminiAPI($customerMessage, $history);

// 4. Image Sending Logic
if (strpos($customerMessage, 'design') !== false) {
    sendWhatsAppImage($customerNumber, "ring_design_01.jpg");
}