{
  config,
  namespace,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib) mkMerge mkIf;
  inherit (config.${namespace}) isDesktop;
in
{
  config = {
    home.preferXdgDirectories = true;

    xdg =
      let
        homeDir = config.home.homeDirectory;
      in
      mkMerge [
        {
          enable = true;

          cacheHome = "${homeDir}/.cache";
          configHome = "${homeDir}/.config";
          dataHome = "${homeDir}/.local/share";
          stateHome = "${homeDir}/.local/state";
        }
        (mkIf isDesktop {
          userDirs = {
            enable = true;
            createDirectories = true;

            desktop = "${homeDir}/desktop";
            documents = null;
            download = "${homeDir}/downloads";
            music = null;
            pictures = "${homeDir}/pictures";
            templates = null;
            videos = "${homeDir}/videos";
          };

          portal = {
            enable = true;
            xdgOpenUsePortal = true;
            extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
            config.common.default = [ "gtk" ];
          };

          mimeApps = rec {
            enable = true;

            associations.added = {
              "application/json" = [ "nvim.desktop" ];
              "application/pdf" = [ "org.pwmt.zathura-pdf-mupdf.desktop" ];
              "application/xhtml+xml" = [ "zen-alpha.desktop" ];
              "application/x-extension-htm" = [ "zen-alpha.desktop" ];
              "application/x-extension-html" = [ "zen-alpha.desktop" ];
              "application/x-extension-shtml" = [ "zen-alpha.desktop" ];
              "application/x-extension-xhtml" = [ "zen-alpha.desktop" ];
              "application/x-extension-xht" = [ "zen-alpha.desktop" ];
              "image/png" = [ "feh.desktop" ];
              "text/html" = [ "zen-alpha.desktop" ];
              "text/plain" = [ "nvim.desktop" ];
              "x-scheme-handler/chrome" = [ "zen-alpha.desktop" ];
              "x-scheme-handler/http" = [ "zen-alpha.desktop" ];
              "x-scheme-handler/https" = [ "zen-alpha.desktop" ];
            };

            defaultApplications = associations.added;
          };
        })
      ];
  };
}