"""Uptime probe — the homelab healthcheck runner.

Polls every service listed in ``CHECKS`` every 5 minutes and posts a
failure to the ntfy topic ``homelab-alerts``.
"""
from __future__ import annotations

import subprocess

#: (name, health URL) for every long-running service.
CHECKS: list[tuple[str, str]] = [
    ("k3s", "https://10.0.1.10:6443/healthz"),
    ("gitea", "https://gitea.reeseapps.com/api/healthz"),
    ("ntfy", "https://ntfy.reeseapps.com/health"),
    ("gitlab", "https://gitlab.reeseapps.com/-/health_check"),
]


def probe(name: str, url: str) -> bool:
    """One HTTP check; returns True when the service answered 200."""
    result = subprocess.run(
        ["curl", "-s", "-o", "/dev/null", "-w", "%{http_code}", "--max-time", "10", url],
        capture_output=True,
        text=True,
    )
    return result.stdout.strip() == "200"


def notify_failure(name: str) -> None:
    """Push an alert to ntfy (best effort — alerting must not crash the probe)."""
    subprocess.run(
        [
            "curl",
            "-s",
            "-X",
            "POST",
            "https://ntfy.reeseapps.com/homelab-alerts",
            "-H",
            "Title: homelab check failed",
            "-d",
            f"{name} is down",
        ],
        capture_output=True,
    )


def run_round() -> int:
    """Probe everything once; returns the number of failing services."""
    failed = 0
    for name, url in CHECKS:
        if not probe(name, url):
            failed += 1
            notify_failure(name)
    return failed


if __name__ == "__main__":
    import sys

    sys.exit(run_round())