nixos-configs/modules/desktop/theme/gtk/default.nix

{
  pkgs,
  lib,
  osConfig,
  ...
}: {
  config = let
    inherit (import ./gradience.nix {inherit pkgs lib;}) gradience;

    cfg = osConfig.roles.desktop;
  in {
    home.packages = [
      pkgs.gnomeExtensions.user-themes
    ];

    # Gtk settings
    gtk = {
      enable = true;

      theme = {
        name = "adw-gtk3";
        package = pkgs.adw-gtk3;
      };

      iconTheme = {
        name = "Flat-Remix-Violet-Dark";
        package = pkgs.flat-remix-icon-theme;
      };

      font = {
        name = "Sans Serif";
        size = cfg.fontSize;
      };

      gtk3 = {
        extraConfig = {
          "gtk-application-prefer-dark-theme" = 1;
        };
        extraCss = "@import url(\"file://${gradience.build}/gtk-3.0/gtk.css\");";
      };

      gtk4 = {
        extraConfig = {
          "gtk-application-prefer-dark-theme" = 1;
        };
        extraCss = "@import url(\"file://${gradience.build}/gtk-4.0/gtk.css\");";
      };
    };

    dconf.settings = {
      "org/gnome/shell/extensions/user-theme" = {
        name = gradience.shellTheme;
      };
      "org/gnome/shell" = {
        enabled-extensions = [pkgs.gnomeExtensions.user-themes.extensionUuid];
      };
    };

    xdg.dataFile.shellTheme = {
      enable = true;
      recursive = true;
      source = "${gradience.build}/gradience-shell";
      target = "themes/${gradience.shellTheme}";
    };
  };

  # For accurate stack trace
  _file = ./default.nix;
}