"""SMS notification provider stubs."""

from __future__ import annotations

import logging
import os

from notifications.base import LoggingNotificationService, NotificationService

logger = logging.getLogger(__name__)


class SmsNotificationService(LoggingNotificationService):
    """
    SMS notification service.

    Currently logs messages. Future providers (Twilio, Urmi, etc.) can be
    plugged in without changing the monitoring engine.
    """

    def __init__(self) -> None:
        self.provider = os.environ.get("SMS_PROVIDER", "logging")
        self.api_key = os.environ.get("SMS_API_KEY", "")
        self.from_number = os.environ.get("SMS_FROM_NUMBER", "")
        self.to_number = os.environ.get("SMS_TO_NUMBER", "")

    def send_sms(self, message: str) -> bool:
        if self.provider == "logging" or not self.api_key:
            return super().send_sms(message)

        # Placeholder for future provider integration
        logger.warning(
            "SMS provider '%s' is not yet implemented; logging instead",
            self.provider,
        )
        return super().send_sms(message)


def create_sms_service() -> NotificationService:
    """Factory for SMS-capable notification service."""
    return SmsNotificationService()