"""signal_alert."""

from __future__ import annotations

import logging
from os import getenv

import httpx

logger = logging.getLogger(__name__)

SIGNAL_API_URL = "http://localhost:8989/v2/send"
SIGNAL_API_TIMEOUT = 4.0


def signal_alert(body: str, title: str = "") -> None:
    """Send a signal alert.

    Args:
        body (str): The body of the alert.
        title (str, optional): The title of the alert. Defaults to "".
    """
    from_phone = getenv("SIGNAL_ALERT_FROM_PHONE")
    to_phone = getenv("SIGNAL_ALERT_TO_PHONE")
    if not from_phone or not to_phone:
        logger.info("SIGNAL_ALERT_FROM_PHONE or SIGNAL_ALERT_TO_PHONE not set")
        return

    # Apprise's Signal integration did not support titles, so preserve that behavior.
    if title:
        logger.debug("Signal does not support notification titles; ignoring title")

    try:
        response = httpx.post(
            SIGNAL_API_URL,
            json={
                "message": body,
                "number": from_phone,
                "recipients": [to_phone],
                "text_mode": "normal",
            },
            timeout=SIGNAL_API_TIMEOUT,
            follow_redirects=True,
        )
    except httpx.HTTPError:
        logger.exception("Unable to contact the Signal API")
        return

    if response.status_code not in {httpx.codes.OK, httpx.codes.CREATED}:
        logger.error("Signal API returned HTTP status %d", response.status_code)