from __future__ import annotations

import json
import logging

import httpx

from server.settings import settings

logger = logging.getLogger(__name__)


def _publish_url() -> str | None:
    if not settings.ntfy_url or not settings.ntfy_topic:
        return None
    return f"{settings.ntfy_url.rstrip('/')}/{settings.ntfy_topic}"


def _click_base() -> str:
    return settings.ntfy_click_url.rstrip("/")


async def send_slot_reminder(
    slot_id: str,
    title: str,
    body: str,
    *,
    silent: bool = True,
) -> int:
    url = _publish_url()
    if not url:
        logger.warning(
            "Notify skipped slot=%s reason=ntfy_not_configured (NTFY_URL + NTFY_TOPIC)",
            slot_id,
        )
        return 0

    click_base = _click_base()
    headers: dict[str, str] = {
        "Title": title,
        "Click": f"{click_base}/?slot={slot_id}",
        "Priority": "2" if silent else "3",
        "Tags": "pill",
        "Actions": json.dumps(
            [
                {
                    "action": "view",
                    "label": "Genommen ✓",
                    "url": f"{click_base}/?action=take&slot={slot_id}",
                },
                {
                    "action": "view",
                    "label": "+15 Min",
                    "url": f"{click_base}/?action=snooze&slot={slot_id}&minutes=15",
                },
                {
                    "action": "view",
                    "label": "+30 Min",
                    "url": f"{click_base}/?action=snooze&slot={slot_id}&minutes=30",
                },
            ]
        ),
    }
    if settings.ntfy_token:
        headers["Authorization"] = f"Bearer {settings.ntfy_token}"

    logger.info("Notify start slot=%s title=%r topic=%s", slot_id, title, settings.ntfy_topic)

    try:
        async with httpx.AsyncClient(timeout=10.0) as client:
            resp = await client.post(url, content=body.encode("utf-8"), headers=headers)
            resp.raise_for_status()
    except httpx.HTTPError as exc:
        logger.warning("Notify failed slot=%s error=%s", slot_id, exc)
        return 0

    logger.info("Notify ok slot=%s", slot_id)
    return 1