{
  config,
  lib,
  ...
}:
let
  homeModules = config.flake.modules.homeManager;
  mkPortableSettings =
    baseSettings:
    lib.recursiveUpdate baseSettings {
      bar.widgets.right = baseSettings.bar.widgets.right ++ [
        {
          id = "Battery";
        }
      ];
    };
in
{
  flake.modules.homeManager.noctalia =
    {
      inputs,
      config,
      lib,
      pkgs,
      ...
    }:
    let
      rawTerminalAttrPath = lib.splitString "." config.meta.user.terminalPackageAttr;
      terminalAttrPath =
        if rawTerminalAttrPath != [ ] && builtins.head rawTerminalAttrPath == "pkgs" then
          builtins.tail rawTerminalAttrPath
        else
          rawTerminalAttrPath;
      terminalPackage = lib.attrByPath terminalAttrPath null pkgs;
      hasMainProgram = terminalPackage != null && terminalPackage ? meta.mainProgram;
      baseSettings =
        if hasMainProgram then
          import ./_noctalia-config.nix {
            inherit
              lib
              terminalPackage
              ;
          }
        else
          { };
    in
    {
      imports = [ inputs.noctalia.homeModules.default ];

      assertions = [
        {
          assertion = terminalPackage != null;
          message = "Unknown terminal package `${config.meta.user.terminalPackageAttr}` for user `${config.meta.user.name}`.";
        }
        {
          assertion = hasMainProgram;
          message = "Terminal package `${config.meta.user.terminalPackageAttr}` must define `meta.mainProgram`.";
        }
      ];

      programs.noctalia-shell = {
        enable = true;
        package = lib.mkForce (
          inputs.noctalia.packages.${pkgs.stdenv.hostPlatform.system}.default.override {
            calendarSupport = true;
          }
        );

        settings = baseSettings;
      };
    };

  flake.modules.homeManager.noctalia-portable =
    {
      config,
      lib,
      pkgs,
      ...
    }:
    let
      rawTerminalAttrPath = lib.splitString "." config.meta.user.terminalPackageAttr;
      terminalAttrPath =
        if rawTerminalAttrPath != [ ] && builtins.head rawTerminalAttrPath == "pkgs" then
          builtins.tail rawTerminalAttrPath
        else
          rawTerminalAttrPath;
      terminalPackage = lib.attrByPath terminalAttrPath null pkgs;
      hasMainProgram = terminalPackage != null && terminalPackage ? meta.mainProgram;
      baseSettings =
        if hasMainProgram then
          import ./_noctalia-config.nix {
            inherit
              lib
              terminalPackage
              ;
          }
        else
          { };
    in
    {
      imports = [ homeModules.noctalia ];
      programs.noctalia-shell.settings = lib.mkForce (
        if hasMainProgram then mkPortableSettings baseSettings else { }
      );
    };
}