{
  config,
  pkgs,
  lib,
  ...
}: let
  cfg = config.aesthetics.targets.gtk;
  aes = config.aesthetics;

  gtk3-nocsd = pkgs.stdenv.mkDerivation {
    pname = "gtk3-nocsd";
    version = "3.0.8";

    src = pkgs.fetchFromGitHub {
      owner = "ZaWertun";
      repo = "gtk3-nocsd";
      rev = "v3.0.8";
      sha256 = "sha256-BOsQqxaVdC5O6EnB3KZinKSj0U5mCcX8HSjRmSBUFks=";
    };

    nativeBuildInputs = with pkgs; [
      pkg-config
    ];

    buildInputs = with pkgs; [
      gtk3
      gobject-introspection
    ];

    installPhase = ''
      mkdir -p $out/lib
      mkdir -p $out/bin
      cp libgtk3-nocsd.so.0 $out/lib/
      cp gtk3-nocsd $out/bin/
    '';
  };

  gtkCSS = with aes.scheme; ''
    @define-color accent_color #${base0D};
    @define-color accent_bg_color #${base0D};
    @define-color accent_fg_color #${base00};
    @define-color destructive_color #${base08};
    @define-color destructive_bg_color #${base08};
    @define-color destructive_fg_color #${base00};
    @define-color success_color #${base0B};
    @define-color success_bg_color #${base0B};
    @define-color success_fg_color #${base00};
    @define-color warning_color #${base0E};
    @define-color warning_bg_color #${base0E};
    @define-color warning_fg_color #${base00};
    @define-color error_color #${base08};
    @define-color error_bg_color #${base08};
    @define-color error_fg_color #${base00};
    @define-color window_bg_color #${base00};
    @define-color window_fg_color #${base05};
    @define-color view_bg_color #${base00};
    @define-color view_fg_color #${base05};
    @define-color headerbar_bg_color #${base01};
    @define-color headerbar_fg_color #${base05};
    @define-color headerbar_border_color #${base01};
    @define-color headerbar_backdrop_color @window_bg_color;
    @define-color headerbar_shade_color rgba(0, 0, 0, 0.07);
    @define-color headerbar_darker_shade_color rgba(0, 0, 0, 0.07);
    @define-color sidebar_bg_color #${base01};
    @define-color sidebar_fg_color #${base05};
    @define-color sidebar_backdrop_color @window_bg_color;
    @define-color sidebar_shade_color rgba(0, 0, 0, 0.07);
    @define-color secondary_sidebar_bg_color @sidebar_bg_color;
    @define-color secondary_sidebar_fg_color @sidebar_fg_color;
    @define-color secondary_sidebar_backdrop_color @sidebar_backdrop_color;
    @define-color secondary_sidebar_shade_color @sidebar_shade_color;
    @define-color card_bg_color #${base01};
    @define-color card_fg_color #${base05};
    @define-color card_shade_color rgba(0, 0, 0, 0.07);
    @define-color dialog_bg_color #${base01};
    @define-color dialog_fg_color #${base05};
    @define-color popover_bg_color #${base01};
    @define-color popover_fg_color #${base05};
    @define-color popover_shade_color rgba(0, 0, 0, 0.07);
    @define-color shade_color rgba(0, 0, 0, 0.07);
    @define-color scrollbar_outline_color #${base02};
    @define-color blue_1 #${base0D};
    @define-color blue_2 #${base0D};
    @define-color blue_3 #${base0D};
    @define-color blue_4 #${base0D};
    @define-color blue_5 #${base0D};
    @define-color green_1 #${base0B};
    @define-color green_2 #${base0B};
    @define-color green_3 #${base0B};
    @define-color green_4 #${base0B};
    @define-color green_5 #${base0B};
    @define-color yellow_1 #${base0A};
    @define-color yellow_2 #${base0A};
    @define-color yellow_3 #${base0A};
    @define-color yellow_4 #${base0A};
    @define-color yellow_5 #${base0A};
    @define-color orange_1 #${base09};
    @define-color orange_2 #${base09};
    @define-color orange_3 #${base09};
    @define-color orange_4 #${base09};
    @define-color orange_5 #${base09};
    @define-color red_1 #${base08};
    @define-color red_2 #${base08};
    @define-color red_3 #${base08};
    @define-color red_4 #${base08};
    @define-color red_5 #${base08};
    @define-color purple_1 #${base0E};
    @define-color purple_2 #${base0E};
    @define-color purple_3 #${base0E};
    @define-color purple_4 #${base0E};
    @define-color purple_5 #${base0E};
    @define-color brown_1 #${base0F};
    @define-color brown_2 #${base0F};
    @define-color brown_3 #${base0F};
    @define-color brown_4 #${base0F};
    @define-color brown_5 #${base0F};
    @define-color light_1 #${base01};
    @define-color light_2 #${base01};
    @define-color light_3 #${base01};
    @define-color light_4 #${base01};
    @define-color light_5 #${base01};
    @define-color dark_1 #${base01};
    @define-color dark_2 #${base01};
    @define-color dark_3 #${base01};
    @define-color dark_4 #${base01};
    @define-color dark_5 #${base01};

    headerbar button.titlebutton.close {
      min-width: 0;
      min-height: 0;
      padding: 0;
      margin: 0;
      border: none;
      opacity: 0;
    }
  '';
in {
  options.aesthetics.targets.gtk.enable = lib.mkOption {
    type = lib.types.bool;
    default = aes.enableAllTargets && aes.hasGui;
    description = "Whether to enable the aesthetics GTK target.";
  };
  config = lib.mkIf cfg.enable {
    gtk = {
      enable = true;
      theme = {
        package = pkgs.adw-gtk3;
        name = "adw-gtk3";
      };
      gtk3.extraConfig = {
        gtk-decoration-layout = "appmenu:none";
      };
      gtk4.extraConfig = {
        gtk-decoration-layout = "appmenu:none";
      };
    };
    xdg.configFile = {
      "gtk-3.0/gtk.css".text = gtkCSS;
      "gtk-4.0/gtk.css".text = gtkCSS;
    };

    home.sessionVariables = {
      GTK_CSD = "0";
      LD_PRELOAD = "${gtk3-nocsd}/lib/libgtk3-nocsd.so.0";
    };

    # Make the binary available in PATH
    home.packages = [ gtk3-nocsd ];
  };
}