{ config, pkgs, lib, ... }: 
let
  # a custom qlcplus desktop file to launch in kiosk mode with the correct workspace
  qlcplus_launcher_entry = pkgs.writeText "qlcplus.desktop" ''
    [Desktop Entry]
    Type=Application
    Name=Q Light Controller Plus
    GenericName=Lighting control
    Keywords=qlc;light;controller;dmx;analog;midi;artnet;e131;osc;
    Exec=${pkgs.qlcplus}/bin/qlcplus --kiosk --open /persist/qlc/stube.qxw
    Icon=qlcplus
    MimeType=application/x-qlc-workspace;
    Categories=Qt;AudioVideo;
    X-XFCE-Source=${pkgs.qlcplus}/share/applications/qlcplus.desktop
  '';

  # a script to start qlcplus as admin in current session
  edit-qlc-workspace = pkgs.writeScriptBin "edit_qlc_workspace.sh" ''
    su -c "${pkgs.qlcplus}/bin/qlcplus --open /persist/qlc/stube.qxw" - admin 
  '';

  # custom menu(top-left) to remove unnecessary entries
  custom-menu-file = pkgs.writeText "custom.menu" ''
    <!DOCTYPE Menu PUBLIC "-//freedesktop//DTD Menu 1.0//EN"
      "http://www.freedesktop.org/standards/menu-spec/1.0/menu.dtd">

    <Menu>
        <Name>Xfce</Name>

        <DefaultAppDirs/>
        <DefaultDirectoryDirs/>

        <Include>
            <Filename>xfce4-file-manager.desktop</Filename>
            <Filename>xfce4-web-browser.desktop</Filename>
            <Filename>shutdown.desktop</Filename>
            <Filename>restart.desktop</Filename>
        </Include>

        <Layout>
            <Filename>xfce4-file-manager.desktop</Filename>
            <Filename>xfce4-web-browser.desktop</Filename>
            <Separator/>
            <Merge type="all"/>
            <Separator/>
            <Filename>shutdown.desktop</Filename>
            <Filename>restart.desktop</Filename>
        </Layout>

        <Menu>
            <Name>Development</Name>
            <Directory>xfce-development.directory</Directory>
            <Include>
                <Category>Development</Category>
            </Include>
        </Menu>

        <Menu>
            <Name>Education</Name>
            <Directory>xfce-education.directory</Directory>
            <Include>
                <Category>Education</Category>
            </Include>
            <Exclude>
                <Filename>math.desktop</Filename>
            </Exclude>
        </Menu>

        <Menu>
            <Name>Games</Name>
            <Directory>xfce-games.directory</Directory>
            <Include>
                <Category>Game</Category>
            </Include>
        </Menu>

        <Menu>
            <Name>Graphics</Name>
            <Directory>xfce-graphics.directory</Directory>
            <Include>
                <Category>Graphics</Category>
            </Include>
            <Exclude>
                <Filename>draw.desktop</Filename>
            </Exclude>
        </Menu>

        <Menu>
            <Name>Multimedia</Name>
            <Directory>xfce-multimedia.directory</Directory>
            <Include>
                <Category>Audio</Category>
                <Category>Video</Category>
                <Category>AudioVideo</Category>
            </Include>
            <Exclude>
                <Filename>qlcplus-fixtureeditor.desktop</Filename>
            </Exclude>
        </Menu>

        <Menu>
            <Name>Network</Name>
            <Directory>xfce-network.directory</Directory>
            <Include>
                <Category>Network</Category>
            </Include>
            <Exclude>
                <Or>
                    <Filename>xfce4-mail-reader.desktop</Filename>
                    <Filename>xfce4-web-browser.desktop</Filename>
                    <Filename>xfce4-web-browser.desktop</Filename>
                    <Filename>firefox.desktop</Filename>
                </Or>
            </Exclude>
        </Menu>

        <Menu>
            <Name>Office</Name>
            <Directory>xfce-office.directory</Directory>
            <Include>
                <Category>Office</Category>
            </Include>
        </Menu>

        <Menu>
            <Name>Science</Name>
            <Directory>xfce-science.directory</Directory>
            <Include>
                <Category>Science</Category>
            </Include>
            <Exclude>
                <Filename>math.desktop</Filename>
            </Exclude>
        </Menu>

        <Menu>
            <Name>System</Name>
            <Directory>xfce-system.directory</Directory>
            <Include>
                <Or>
                    <Category>Emulator</Category>
                    <Category>System</Category>
                </Or>
            </Include>
            <Exclude>
                <Filename>xfce4-session-logout.desktop</Filename>
            </Exclude>

            <Menu>
                <Name>Settings</Name>
                <Directory>xfce-settings.directory</Directory>
                <Include>
                    <Category>Settings</Category>
                </Include>

                <Layout>
                    <Filename>xfce-settings-manager.desktop</Filename>
                    <Separator/>
                    <Merge type="all"/>
                </Layout>

                <Menu>
                    <Name>Screensavers</Name>
                    <Directory>xfce-screensavers.directory</Directory>
                    <Include>
                        <Category>Screensaver</Category>
                    </Include>
                </Menu>
            </Menu>

            <Menu>
                <Name>Accessories</Name>
                <Directory>xfce-accessories.directory</Directory>
                <Include>
                    <Or>
                        <Category>Accessibility</Category>
                        <Category>Core</Category>
                        <Category>Legacy</Category>
                        <Category>Utility</Category>

                        <Filename>qlcplus-fixtureeditor.desktop</Filename>
                    </Or>
                </Include>
                <Exclude>
                    <Or>
                        <Filename>xfce4-file-manager.desktop</Filename>
                        <Filename>xfce4-terminal-emulator.desktop</Filename>
                        <Filename>xfce4-about.desktop</Filename>
                        <Filename>xfce4-run.desktop</Filename>
                    </Or>
                </Exclude>
            </Menu>
        </Menu>

        <Menu>
            <Name>Other</Name>
            <Directory>xfce-other.directory</Directory>
            <OnlyUnallocated/>
            <Include>
                <All/>
            </Include>
        </Menu>
        <DefaultMergeDirs/>

    </Menu>
  '';
in
{

  home.persistence."/persist/home/stube" = {
    files = [
      # xfconf.settings needs an existing installation (not all values are specified below)
      ".config/xfce4/xfconf/xfce-perchannel-xml"
    ];
    directories = [
      # keep mixxx song database between reboots
      ".mixxx"
      "Music"
      "Videos"
    ];
    allowOther = false;
  };

  # restart xfce4 panels on configuration change (ignore errors)
  home.activation.restart-xfce4-panel = lib.hm.dag.entryAfter ["writeBoundary"] ''
    run /bin/sh -c "${pkgs.xfce.xfce4-panel}/bin/xfce4-panel -r || true"
  '';

  # configure xfce4 desktop environment
  xfconf.settings = {
    xfwm4 = {
      "general/workspace_count" = 1;
    };
    xfce4-power-manager = {
      "xfce4-power-manager/presentation-mode" = true;
      "xfce4-power-manager/lock-screen-suspend-hibernate" = false;
    };
    xfce4-notifyd."do-not-disturb" = true;
    xfce4-panel = {
      "plugins/plugin-100" = "applicationsmenu";
      "plugins/plugin-100/custom-menu" = true;
      "plugins/plugin-100/custom-menu-file" = "${custom-menu-file}";
      "plugins/plugin-100/button-icon" = "org.xfce.panel.actions";
      "plugins/plugin-100/button-title" = "Anwendungen";
      "plugins/plugin-110" = "separator";
      "plugins/plugin-110/style" = 0;
      "plugins/plugin-101" = "tasklist";
      "plugins/plugin-101/grouping" = "1";
      "plugins/plugin-101/show-handle" = false;
      "plugins/plugin-102" = "separator";
      "plugins/plugin-102/expand" = true;
      "plugins/plugin-102/style" = 0;
      "plugins/plugin-103" = "systray";
      "plugins/plugin-103/square-icons" = true;
      "plugins/plugin-104" = "separator";
      "plugins/plugin-104/style" = 0;
      "plugins/plugin-105" = "pulseaudio";
      "plugins/plugin-105/enable-keyboard-shortcuts" = true;
      "plugins/plugin-106" = "separator";
      "plugins/plugin-106/style" = 0;
      "plugins/plugin-107" = "clock";
      "plugins/plugin-107/digital-date-format" = "%d %b %Y";
      "plugins/plugin-108" = "separator";
      "plugins/plugin-108/style" = 0;
      /*
      "plugins/plugin-109" = "actions";
      "plugins/plugin-109/items" = [
        "-lock-screen"
        "-switch-user"
        "-separator"
        "-suspend"
        "-hibernate"
        "-hybrid-sleep"
        "-separator"
        "+shutdown"
        "-restart"
        "-separator"
        "-logout"
        "-logout-dialog"
      ];
      */
      "panels/panel-1/plugin-ids" = [ 100 110 101 102 103 104 105 106 107 108 ];

      "plugins/plugin-200" = "showdesktop";
      "plugins/plugin-201" = "launcher";
      "plugins/plugin-201/items" = ["${pkgs.xfce.xfce4-settings}/share/applications/xfce4-file-manager.desktop"];

      "plugins/plugin-210" = "separator";
      "plugins/plugin-210/style" = 0;

      "plugins/plugin-211" = "launcher";
      "plugins/plugin-211/items" = ["${pkgs.firefox}/share/applications/firefox.desktop"];
      "plugins/plugin-212" = "launcher";
      "plugins/plugin-212/items" = ["${pkgs.spotify}/share/applications/spotify.desktop"];
      "plugins/plugin-213" = "launcher";
      "plugins/plugin-213/items" = ["${pkgs.mixxx}/share/applications/org.mixxx.Mixxx.desktop"];

      "plugins/plugin-220" = "separator";
      "plugins/plugin-220/style" = 0;


      "plugins/plugin-221" = "launcher";
      "plugins/plugin-221/items" = [ "${qlcplus_launcher_entry}" ];

      "panels/panel-2/plugin-ids" = [ 200 201 210 211 212 213 220 221 ];
    };
    xfce4-desktop = {
      # left monitor
      "backdrop/screen0/monitorDP-1/workspace0/image-style" = 5;
      "backdrop/screen0/monitorDP-1/workspace0/color-style" = 0;
      "backdrop/screen0/monitorDP-1/workspace0/last-image" = "${./background.jpg}";

      # right monitor (no background image to save displaylink bandwidth)
      "backdrop/screen0/monitorVGA-1/workspace0/image-style" = 0;
      "backdrop/screen0/monitorVGA-1/workspace0/color-style" = 0;
      "backdrop/screen0/monitorVGA-1/workspace0/rgba1" = [0.369  0.361  0.392 1];

      "backdrop/screen0/monitorVGA-1-1/workspace0/image-style" = 0;
      "backdrop/screen0/monitorVGA-1-1/workspace0/color-style" = 0;
      "backdrop/screen0/monitorVGA-1-1/workspace0/rgba1" = [0.369  0.361  0.392 1];

      # beamer
      "backdrop/screen0/monitorHDMI-1/workspace0/image-style" = 5;
      "backdrop/screen0/monitorHDMI-1/workspace0/color-style" = 0;
      "backdrop/screen0/monitorHDMI-1/workspace0/last-image" = "${./background.jpg}";

      # virtual machine screen
      "backdrop/screen0/monitorVirtual-1/workspace0/image-style" = 5;
      "backdrop/screen0/monitorVirtual-1/workspace0/last-image" = "${./background.jpg}";

      "desktop-icons/file-icons/show-home" = false;
      "desktop-icons/file-icons/show-filesystem" = false;
      "desktop-icons/file-icons/show-trash" = false;
    };
  };

  # desktop file for shutdown entry in menu
  xdg.desktopEntries.shutdown = {
    name = "Herunterfahren";
    terminal = false;
    icon = "xfsm-shutdown";
    exec = "shutdown -h now";
  };

  # desktop file for reboot entry in menu
  xdg.desktopEntries.restart = {
    name = "Neustarten";
    terminal = false;
    icon = "xfsm-reboot";
    exec = "reboot";
  };


  home.packages = with pkgs; [
    qlcplus # dmx controller
    spotify # audio player
    mixxx # more professional audio player
    vlc # media player
    mpv # media player
    libreoffice-still # office
    edit-qlc-workspace # script defined earlier
  ];

  # firefox without google, ads and anything unnecessary
  programs.firefox = {
    enable = true;
    profiles.default = {
      settings = {
        "browser.startup.homepage" = "https://duckduckgo.com";
        "general.useragent.locale" = "de-DE";
      };
      search = {
        default = "DuckDuckGo";
        force = true;
      };
    };
    policies = {
      DisableTelemetry = true;
      DisableFirefoxStudies = true;
      EnableTrackingProtection = {
        Value = true;
        Locked = true;
        Cryptomining = true;
        Fingerprinting = true;
      };
      DisablePocket = true;
      DisableFirefoxAccounts = true;
      DisableAccounts = true;
      DisableFirefoxScreenshots = true;
      OverrideFirstRunPage = "";
      OverridePostUpdatePage = "";
      DontCheckDefaultBrowser = true;
      DisplayBookmarksToolbar = "never";
      DisplayMenuBar = "default-off";
      SearchBar = "unified";

      ExtensionSettings = {
        "*".installation_mode = "blocked";
        "uBlock0@raymondhill.net" = {
          install_url = "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi";
          installation_mode = "force_installed";
        };
      };
    };
  };

  home.stateVersion = "24.05";
}