// Handle notifications from Telegram to vendors
export const notifyVendor = async (req, res) => {
  try {
    const { buyerId, storeId, message, source } = req.body;
    
    if (!buyerId || !storeId || !message) {
      return res.status(400).json({ error: "Missing required parameters" });
    }
    
    // Find the store and check if it exists
    const store = await Store.findById(storeId);
    if (!store) {
      logger.warn("Store not found for vendor notification", { storeId });
      return res.status(404).json({ error: "Store not found" });
    }
    
    // Get the vendor
    const vendor = await Vendor.findById(store.vendorId);
    if (!vendor) {
      logger.warn("Vendor not found for notification", { storeId, vendorId: store.vendorId });
      return res.status(404).json({ error: "Vendor not found" });
    }
    
    // Future enhancement: could implement WebSocket/Server-Sent Events for real-time notifications
    // For now, we'll just track that the notification was processed
    
    logger.info("Processed vendor notification", { 
      buyerId,
      storeId,
      vendorId: vendor._id,
      source: source || "unknown"
    });
    
    return res.status(200).json({ success: true });
  } catch (error) {
    logger.error("Error processing vendor notification", { error: error.message, stack: error.stack });
    return res.status(500).json({ error: "Server error processing notification" });
  }
};