{
  inputs,
  outputs,
  config,
  lib,
  pkgs,
  ...
}:
let
  enableDisplayManager = false;
  hostname = "jallen-nas";
in
{
  # Services configs
  services = {
    udisks2.enable = true;

    # Enable the X11 windowing system.
    xserver = {
      enable = enableDisplayManager;

      # Enable the Plasma 6 Desktop Environment.
      desktopManager.plasma5.enable = enableDisplayManager;
    };

    displayManager = {
      sddm.enable = enableDisplayManager;
      #defaultSession = "plasma";
    };

    # Set to enable Flatpak
    flatpak.enable = false;

    # Enable RDP
    xrdp = {
      enable = enableDisplayManager;
      defaultWindowManager = "startplasma-x11";
      openFirewall = enableDisplayManager;
    };

    avahi = {
      enable = true;
      nssmdns4 = true;
      publish = {
        enable = true;
        addresses = true;
        domain = true;
        hinfo = true;
        userServices = true;
        workstation = true;
      };
      extraServiceFiles = {
        # TODO is this needed?
        smb = ''
          <?xml version="1.0" standalone='no'?><!--*-nxml-*-->
          <!DOCTYPE service-group SYSTEM "avahi-service.dtd">
          <service-group>
            <name replace-wildcards="yes">%h</name>
            <service>
              <type>_smb._tcp</type>
              <port>445</port>
            </service>
          </service-group>
        '';
      };
    };

    apcupsd = {
      enable = true;
    };

    grafana = {
      enable = false;
      settings.server = {
        http_port = 2342;
        domain = hostname;
        serve_from_sub_path = true;
        http_addr = "";
      };
      dataDir = "/media/nas/ssd/nix-app-data/grafana";
    };

    prometheus = {
      enable = false;
      port = 9001;
      exporters = {
        node = {
          enable = true;
          enabledCollectors = [
            "diskstats"
            "systemd"
          ];
          port = 9002;
        };
        smartctl = {
          enable = true;
          group = "disk";
          devices = [
            "/dev/sda"
            "/dev/sdb"
            "/dev/sdc"
            "/dev/sdd"
            "/dev/sde"
            "/dev/sdf"
            "/dev/sdg"
            "/dev/sdh"
            "/dev/sdi"
            "/dev/nvme0n1"
            "/dev/nvme1n1"
          ];
        };
      };

      scrapeConfigs = [
        {
          job_name = hostname;
          static_configs = [
            {
              targets = [
                "127.0.0.1:${toString config.services.prometheus.exporters.node.port}"
                "127.0.0.1:${toString config.services.prometheus.exporters.smartctl.port}"
              ];
            }
          ];
        }
      ];
    };

    tailscale = {
      enable = false;
      openFirewall = true;
      useRoutingFeatures = "client";
      extraUpFlags = [ "--advertise-exit-node" ];
    };

    btrfs = {
      autoScrub.enable = false;
      autoScrub.fileSystems = [
        "/nix"
        "/root"
        "/etc"
        "/var/log"
        "/home"
        "/media/nas/ssd/nix-app-data"
        "/media/nas/ssd/ssd_app_data"
        "/media/nas/ssd/mariadb"
        "/media/nas/main/3d_printer"
        "/media/nas/main/backup"
        "/media/nas/main/documents"
        "/media/nas/main/nextcloud"
        "/media/nas/main/movies"
        "/media/nas/main/tv"
        "/media/nas/main/isos"
      ];
    };
  };

  systemd.services = {

    tailscale-autoconnect = {
      description = "Automatic connection to Tailscale";

      # make sure tailscale is running before trying to connect to tailscale
      after = [
        "network-pre.target"
        "tailscale.service"
      ];
      wants = [
        "network-pre.target"
        "tailscale.service"
      ];
      wantedBy = [ "multi-user.target" ];

      # set this service as a oneshot job
      serviceConfig.Type = "oneshot";

      # have the job run this shell script
      script = with pkgs; ''
        # wait for tailscaled to settle
        sleep 2

        # check if we are already authenticated to tailscale
        status="$(${tailscale}/bin/tailscale status -json | ${jq}/bin/jq -r .BackendState)"
        if [ $status = "Running" ]; then # if so, then do nothing
          exit 0
        fi

        # otherwise authenticate with tailscale
        ${tailscale}/bin/tailscale up -authkey nodekey:e4557e761f8fa2cb51a189d32484092036d3954b61502b7e19688869a5107707
      '';
    };

    glances-server = {
      path = [
        pkgs.bash
        pkgs.glances
      ];
      script = ''
        glances -w
      '';
      wantedBy = [ "multi-user.target" ];
    };
  };
}