{ config, lib, vars, ... }:

{
  fileSystems.${vars.raspiMountpoint} = {
    device = "${vars.raspberryPiHost}.${vars.tailnetDomain}:${vars.raspiNfsPath}";
    fsType = "nfs4";
    options = [
      "nofail"
      "_netdev"
      "noatime"

      # Explicitly use NFSv4.2 if supported
      "nfsvers=4.2"
    ] ++ lib.optionals (!config.boot.isContainer) [
      # `x-systemd.automount` never works inside a Linux container (LXC
      # included) -- confirmed live on lxc-docker: systemd logs "Starting
      # of <unit>.automount unsupported" and never mounts it. `nofail`
      # above already keeps boot non-blocking there, so plain eager
      # mounting is fine.

      # Don't mount until first access
      "x-systemd.automount"

      # Unmount after 10 min idle
      "x-systemd.idle-timeout=600"

      # Give the Pi/Tailscale a little time to appear
      "x-systemd.device-timeout=10s"
    ];
  };

}