import os, logging
from twilio.rest import Client
import streamlit as st

logger = logging.getLogger(__name__)


@st.cache_data
def get_ice_servers():
    try:
        sid = os.environ["TWILIO_ACCOUNT_SID"]
        token = os.environ["TWILIO_AUTH_TOKEN"]
    except KeyError:
        logger.warning("Twilio credentials not set; falling back to public STUN only.")
        return [{"urls": ["stun:stun.l.google.com:19302"]}]
    client = Client(sid, token)
    # This will return both STUN and TURN servers from Twilio
    token = client.tokens.create()
    return token.ice_servers