// Webhook handler: messages.received
app.post('/webhooks/onlyfans', async (req, res) => {
  const { event, account_id, payload } = req.body;

  if (event === 'messages.received') {
    // payload.fromUser = sender profile with subscription info
    // payload.text = message content (HTML)
    // payload.fanData.spending = fan's lifetime spend
    const { fromUser, text, fanData } = payload;

    // Skip if message is from the creator (outgoing)
    if (fromUser.isPerformer) return res.sendStatus(200);

    // Generate AI response (your chatbot logic)
    const aiReply = await yourAIChatbot.generateReply({
      message: text,
      fanName: fromUser.name,
      fanSpend: fanData.spending.total,
    });

    // Show typing indicator for natural feel
    await fetch(
      'https://app.onlyfansapi.com/api/' + account_id + '/chats/' + fromUser.id + '/typing',
      {
        method: 'POST',
        headers: {
          'Authorization': 'Bearer sk_your_api_key',
          'Content-Type': 'application/json'
        }
      }
    );

    // Wait 2-4 seconds to simulate typing
    await new Promise(r => setTimeout(r, 2000 + Math.random() * 2000));

    // Send the reply
    await fetch(
      'https://app.onlyfansapi.com/api/' + account_id + '/chats/' + fromUser.id + '/messages',
      {
        method: 'POST',
        headers: {
          'Authorization': 'Bearer sk_your_api_key',
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({ text: aiReply })
      }
    );
  }

  res.sendStatus(200);
});