import os
import logging
from twilio.rest import Client

logger = logging.getLogger(__name__)

def send_alert_sms(to_phone: str, room_title: str, room_link: str = None, client_email: str = None) -> bool:
    """
    Sends an SMS alert using Twilio notifying the client of an issue and support room creation.
    """
    account_sid = os.environ.get("TWILIO_SID")
    auth_token = os.environ.get("TWILIO_ACCOUNT_SECRET")
    from_phone = os.environ.get("TWILIO_PHONE_NUMBER")  # Requires your Twilio sender phone number

    if not account_sid or not auth_token or not from_phone:
        logger.error("Twilio environment variables (TWILIO_SID, TWILIO_ACCOUNT_SECRET, TWILIO_PHONE_NUMBER) missing.")
        return False

    if not to_phone:
        logger.warning("No recipient phone number provided for SMS.")
        return False

    # --- PRINT LINK/INFO BEFORE SENDING ---
    print("\n" + "="*50)
    print(f"[Twilio] Preparing SMS for: {to_phone}")
    print(f"[Twilio] Room Title: {room_title}")
    if room_link:
        print(f"[Twilio] Room Link: {room_link}")
    else:
        print(f"[Twilio] Link: Invitation email sent to {client_email or 'client inbox'}")
    print("="*50 + "\n")

    # --- BUILD SMS CONTENT ---
    body = (
        f"Alert: A technical issue occurred with your equipment/microwave. "
        f"A support chat room '{room_title}' has been created to assist you.\n\n"
    )

    if room_link:
        body += f"Join chat room: {room_link}\n"
    
    if client_email:
        body += f"An invitation link has also been sent to your email ({client_email})."
    else:
        body += "An invitation link has been sent to your inbox."

    try:
        client = Client(account_sid, auth_token)
        message = client.messages.create(
            body=body,
            from_=from_phone,
            to=to_phone
        )
        logger.info(f"SMS sent successfully to {to_phone}. Message SID: {message.sid}")
        return True
    except Exception as e:
        logger.exception(f"Failed to send SMS via Twilio to {to_phone}: {e}")
        return False