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

{
  # Prestages a NetworkManager connection profile for vars.wifiSsid so the
  # host associates on first boot with no manual nmtui/nmcli step. Guarded
  # on a non-empty SSID so leaving the placeholder blank in variables.nix
  # is a no-op rather than an empty, broken profile — fill it in once the
  # network is known.
  #
  # The password itself lives in secrets/gui.yaml, not variables.nix --
  # NetworkManager's ensureProfiles renders `psk = "$WIFI_PASSWORD"`
  # literally into the store (see nixpkgs' own ensureProfiles example,
  # which does the same for exactly this reason) and its systemd service
  # envsubst-expands it from environmentFiles at activation time, so the
  # real value only ever touches /run (root-only, UMask 0177), never the
  # Nix store.
  sops.secrets."wifi-password" = lib.mkIf (vars.wifiSsid != "") {
    sopsFile = ../../secrets/gui.yaml;
  };

  sops.templates."wifi-password.env" = lib.mkIf (vars.wifiSsid != "") {
    content = "WIFI_PASSWORD=${config.sops.placeholder."wifi-password"}";
  };

  networking.networkmanager.ensureProfiles = lib.mkIf (vars.wifiSsid != "") {
    environmentFiles = [ config.sops.templates."wifi-password.env".path ];

    profiles.${vars.wifiSsid} = {
      connection = {
        id = vars.wifiSsid;
        type = "wifi";
      };
      wifi = {
        mode = "infrastructure";
        ssid = vars.wifiSsid;
      };
      wifi-security = {
        key-mgmt = "wpa-psk";
        psk = "$WIFI_PASSWORD";
      };
    };
  };
}