curl -X POST "https://api.telnyx.com/v2/messages/whatsapp" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "+15551234567",
    "to": "+15557654321",
    "whatsapp_message": {
      "type": "template",
      "template": {
        "name": "welcome_message",
        "language": {
          "policy": "deterministic",
          "code": "en_US"
        },
        "components": [
          {
            "type": "body",
            "parameters": [
              {
                "type": "text",
                "text": "John"
              }
            ]
          }
        ]
      }
    }
  }'

from flask import Flask, request, jsonify
import hmac
import hashlib

app = Flask(__name__)

@app.route('/webhooks/telnyx', methods=['POST'])
def handle_webhook():
    webhook_data = request.json
    event_type = webhook_data['data']['event_type']
    payload = webhook_data['data']['payload']
    
    if event_type == 'message.sent':
        print(f"WhatsApp message sent: {payload['id']}")
        print(f"Status: {payload.get('to', [{}])[0].get('status', 'unknown')}")
        
    elif event_type == 'message.received':
        print(f"WhatsApp message received: {payload['text']}")
        print(f"From: {payload['from']}")
        
        # Auto-reply during 24-hour window
        reply_to_customer(payload['from'], payload['to'])
    
    return '', 200

def reply_to_customer(customer_number, business_number):
    import telnyx
    telnyx.api_key = "YOUR_API_KEY"
    
    # Send free-form message (no template required in 24hr window)
    telnyx.WhatsApp.create(
        from_=business_number,
        to=customer_number,
        whatsapp_message={
            "type": "text",
            "text": {
                "body": "Thanks for your message! We'll get back to you soon.",
                "preview_url": False
            }
        }
    )

if __name__ == '__main__':
    app.run(debug=True)