import subprocess, psutil

def health(cfg):
    lines = ["🩺 Health check\n"]

    try:
        subprocess.check_output(["restic", "snapshots"], timeout=10)
        lines.append("🟢 Backup repo reachable")
    except Exception:
        lines.append("🔴 Backup repo unreachable")

    for alias, real in cfg["docker"]["containers"].items():
        out = subprocess.getoutput(
            f"docker inspect -f '{{{{.State.Status}}}}' {real}"
        )
        if out.strip() != "running":
            lines.append(f"🔴 {alias} down")
        else:
            lines.append(f"🟢 {alias} OK")

    disk = psutil.disk_usage("/mnt/data")
    usage = disk.percent
    if usage > cfg["thresholds"]["disk_warn"]:
        lines.append(f"🟡 Disk usage {usage}%")
    else:
        lines.append(f"🟢 Disk {usage}%")

    load = psutil.getloadavg()[0]
    lines.append(f"{'🟢' if load < cfg['thresholds']['load_warn'] else '🟡'} Load {load}")

    return "\n".join(lines)