{ pkgs, lib, config, ... }:
{
  services.xserver = let commaSep = builtins.concatStringsSep ","; in with import ../theme.nix; {
    enable = true;
    layout = commaSep [ "de" "gr" "ru" ];
    xkbVariant = commaSep [ "T3" "polytonic" "phonetic_winkeys" ];
    xkbOptions = commaSep [ "terminate:ctrl_alt_bksp" "grp:alt_shift_toggle" ];
    libinput.enable = true;
    xautolock = {
      enable = true;
      killer = "${pkgs.systemd}/bin/systemctl suspend";
      locker = config.defaultApplications.locker;
      nowlocker = config.defaultApplications.locker;
      enableNotifier = true;
      notifier = ''${pkgs.libnotify}/bin/notify-send -u normal -a xautolock "Locking soon" "The screen will lock in 10 seconds."'';
    };
    displayManager.sessionCommands = ''
      ${pkgs.feh}/bin/feh --bg-fill $(find ${../art} -type f | shuf -n 1) &
      ${pkgs.dropbox-cli}/bin/dropbox start &
      ${pkgs.seafile-client}/bin/seafile-applet &
      ${pkgs.systemd}/bin/systemctl --user import-environment XDG_SESSION_PATH
      ${pkgs.lightlocker}/bin/light-locker &
      ${pkgs.openssh}/bin/ssh-add
    '';
    displayManager.lightdm.greeters.gtk = {
      enable = true;
      theme = { name = config.constants.theme.gtk.name; package = config.constants.theme.gtk.package; };
      iconTheme = { name = config.constants.theme.icon.name; package = config.constants.theme.icon.package; };
      indicators = [ "~spacer" "~host" "~spacer" "~session" "~power" ];
    };
    desktopManager.xterm.enable = false;
    windowManager.default = "i3";
    windowManager.i3.enable = true;
    xrandrHeads = {
      homeros = [ "LVDS1" { output = "HDMI1"; primary = true; } ];
      scardanelli = [ "eDP1" ];
    }.${config.networking.hostName};
  };

  services.compton = {
    enable = true;
    shadow = true;
    menuOpacity = "0.9";
    shadowOpacity = "0.3";
  };

  services.redshift = {
    enable = true;
    latitude = "52";
    longitude = "13";
  };

  services.illum.enable = true;

  services.unclutter = {
    enable = true;
    timeout = 10;
  };

  fonts.enableDefaultFonts = true;
  fonts.fonts = with pkgs; [
    cantarell-fonts
    corefonts
    eb-garamond
    fira
    libertine
    lmodern
    noto-fonts
    powerline-fonts
    roboto
    xlibs.fontschumachermisc
    ubuntu_font_family
  ];

  # packages for X
  environment.systemPackages = with pkgs; [
    config.constants.theme.gtk.package
    config.constants.theme.icon.package
    config.constants.theme.cursor.package
    arandr
    libnotify
    xclip
    xorg.xkill
    wpa_supplicant_gui
  ] ++ [ # office
    abiword
    gnumeric
    # typora
  ] ++ [ # internet
    chromium
    firefox
    tor-browser-bundle-bin
    thunderbird
  ] ++ [ # media
    ffmpeg
    mpv
    pamixer
    pavucontrol
    gthumb
    sxiv
    blueman
    zathura
  ];

  services.urxvtd.enable = true;
  services.dbus.packages = [ pkgs.gnome3.dconf ];

  home-manager.users.kfm = {
    gtk = {
      enable = true;
      iconTheme = config.constants.theme.icon;
      theme = config.constants.theme.gtk;
    };
    qt = {
      enable = true;
      useGtkTheme = true;
    };
    xsession.pointerCursor = config.constants.theme.cursor // { size = 16; };
    xsession.windowManager.i3 = {
      enable = true;
      config = import ../dot/i3.nix { inherit lib pkgs config; };
    };
    xresources.properties = import ../dot/xresources.nix { inherit lib; };
    programs.rofi = import ../dot/rofi.nix { inherit config; };
    services.dunst = import ../dot/dunst.nix { inherit pkgs config; };
    programs.urxvt = import ../dot/urxvt.nix { inherit pkgs; };
    programs.zathura = import ../dot/zathura.nix;

    home.file = {
      ".config/mpv/input.conf".text = import ../dot/mpv.nix;
      # ".config/Typora/themes/base.user.css".text = import ../dot/typora.nix;
    };
  };
}