{ config, lib, pkgs, ... }:

with lib;

let
  cfg = config.machine;
  ifelse = a: b: c: if a then b else c;
in mkIf (elem "desktop" cfg.services) {
  programs.sway = mkIf (elem "sway" cfg.desktop.wms) # (import ./desktop/sway.nix { inherit pkgs; });
{
    enable = true;
    extraPackages = with pkgs; [
      file i3status dmenu
      qt5.qtwayland
      grim slurp
      swaylock
      swayidle
      light
      mako
      wl-clipboard
      wf-recorder
    ];
    extraSessionCommands = ''
      export GDK_BACKEND=wayland
      export CLUTTER_BACKEND=wayland
      export SDL_VIDEODRIVER=wayland
      # needs qt5.qtwayland in systemPackages
      export QT_QPA_PLATFORM=wayland-egl
      export QT_WAYLAND_FORCE_DPI=physical
      export QT_WAYLAND_DISABLE_WINDOWDECORATION="1"
      # Fix for some Java AWT applications (e.g. Android Studio),
      # use this if they aren't displayed properly:
      export _JAVA_AWT_WM_NONREPARENTING=1
    '';
  };

  services.gvfs.enable = true;
  services.xserver = {
    enable = !(elem "sway" cfg.desktop.wms);
    layout = "de";
    displayManager.defaultSession = ifelse (cfg.desktop.wms != []) (elemAt cfg.desktop.wms 0) null;
    windowManager = mkIf (cfg.desktop.wms != []) {
      i3 = mkIf (elem "i3" cfg.desktop.wms) (import ./desktop/i3.nix { inherit pkgs; });
    };
    libinput = {
      enable = true;
      touchpad = {
        tapping = true;
        disableWhileTyping = false;
        naturalScrolling = false;
        horizontalScrolling = true;
      };
    };
  };
  services.udev.extraRules = ''
    ACTION=="add", SUBSYSTEM=="backlight", RUN+="${pkgs.coreutils}/bin/chgrp video /sys/class/backlight/%k/brightness"
    ACTION=="add", SUBSYSTEM=="backlight", RUN+="${pkgs.coreutils}/bin/chmod 664 /sys/class/backlight/%k/brightness"
  '';
  machine.pkgsets.python3.pkgs = with pkgs.python310Packages; [ py3status pytz tzlocal ];
}