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

let
  isLaptop = systemName == "laptop";
  isPc = systemName == "pc";
in
{
  # ─── Desktop & Input ───────────────────────────────────────────────────────
  services.xserver.windowManager.fvwm2.gestures = true;

  # Enable touchpad support (enabled by default in most desktop managers).
  services.libinput = {
    enable = true;
    touchpad = {
      tapping = true;
      # horizontalScrolling = false;
    };
  };

  # Configure keymap in X11
  # services.xserver.xkb.layout = "us";
  # services.xserver.xkb.options = "eurosign:e,caps:escape";
  # Enable the X11 windowing system.
  # services.xserver.enable = true;

  # Enable the GNOME Desktop Environment.
  # services.xserver.displayManager.gdm.enable = true;
  # services.xserver.desktopManager.gnome.enable = true;

  # ─── Audio / Bluetooth ──────────────────────────────────────────────────────
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    jack.enable = true;
    extraConfig.pipewire."92-low-latency"."context.properties" =
      if isLaptop
      then {
        "default.clock.rate" = 48000;
        "default.clock.allowed-rates" = [ 48000 ];
      }
      else {
        "default.clock.rate" = 96000;
        "default.clock.allowed-rates" = [ 44100 48000 96000 ];
      };
  };

  # ─── Nice Shit ──────────────────────────────────────────────────────────────
  services.ananicy = {
    enable = true;
    package = pkgs.ananicy-cpp;
    rulesProvider = pkgs.ananicy-cpp;
    extraRules = [
      {
        "name" = "gamescope";
        "nice" = -20;
      }
    ];
  };

  services.blueman.enable = true;

  # ─── Printing & Files ───────────────────────────────────────────────────────
  # Enable CUPS to print documents.
  services.printing.enable = true;

  services.gvfs.enable = true;
  services.tumbler.enable = true;

  # ─── Time & Power ───────────────────────────────────────────────────────────
  services.automatic-timezoned.enable = true;

  # Power management
  services.power-profiles-daemon.enable = true;
  services.upower = {
    enable = true;
  };

  # Laptop-specific lid and sleep behavior
  services.logind.settings.Login = lib.mkIf isLaptop {
    HandleLidSwitch = "suspend-then-hibernate";
    HandleLidSwitchExternalPower = "suspend-then-hibernate";
    HandleLidSwitchDocked = "suspend-then-hibernate";
  };

  systemd.sleep.extraConfig = lib.mkIf isLaptop ''
    HibernateDelaySec=120min
    SuspendState=mem
  '';

  # ─── Developer Tools & Services ─────────────────────────────────────────────
  # direnv speedup
  services.lorri.enable = true;

  services.emacs = {
    enable = true;
    # replace with emacs-gtk, or a version provided by the community overlay if desired.
    package = pkgs.emacs-pgtk;
  };

  #services.flatpak.enable = true;

  # Sunshine (only on PC)
  services.sunshine = lib.mkIf isPc {
    enable = false;
    settings = {
      sunshine_name = "nixos";
      port = 47989;
      output_name = 0;
    };
    applications = {
      apps = [
        {
          name = "Steam";
          env = {
            PATH = "$(PATH):/run/current-system/sw/bin";
          };
          output = "steam.txt";
          detached = [
            "setsid /run/current-system/sw/bin/steam steam://open/bigpicture"
          ];
          prep-cmd = [
            {
              "do" = "";
              "undo" = "setsid /run/current-system/sw/bin/steam steam://close/bigpicture";
            }
          ];
          image-path = "steam.png";
        }
      ];
    };
    capSysAdmin = false;
    openFirewall = true;
  };

  # Ollama (only on PC)
  services.ollama = lib.mkIf isPc {
    enable = true;
    package = pkgs.ollama-rocm;
    port = 11434;
    host = "127.0.0.1"; # Bind to localhost only for security
    rocmOverrideGfx = "11.0.0";
    environmentVariables = {
      OLLAMA_DEBUG = "1";
      OLLAMA_MMAP = "0";
      OLLAMA_NUM_CTX = "40000";
      OLLAMA_NUM_GPU = "20";
      OLLAMA_FLASH_ATTENTION = "true";
      OLLAMA_KV_CACHE_TYPE = "f16";
    };
  };

  # ─── Systemd User Services ──────────────────────────────────────────────────
  systemd.user.services.steam-run-url-service = {
    description = "Service to launch Steam URLs via FIFO";
    wantedBy = [ "default.target" ];
    serviceConfig = {
      ExecStart =
        let
          script = pkgs.writeShellScript "steam-run-url-service.sh" ''
            #!/usr/bin/env bash
            FIFO="/run/user/$(id --user)/steam-run-url.fifo"
            if [ ! -p "$FIFO" ]; then
              mkfifo "$FIFO"
            fi
            while true; do
              if read line <"$FIFO"; then
                steam_env=();
                if [ "$XDG_SESSION_DESKTOP" = "sway" ] || [ "$XDG_SESSION_DESKTOP" = "Hyprland" ] || [ "$DESKTOP_SESSION" = "sway" ] || [ "$DESKTOP_SESSION" = "Hyprland" ]; then
                  steam_env+=("QT_QPA_PLATFORM=wayland");
                fi
                steam "$line"
              fi
            done
          '';
        in
        "${script}";
      Restart = "always";
    };
    path = [ pkgs.steam ];
  };

  # ─── Networking & Remote ────────────────────────────────────────────────────
  # services.resolved = {
  #   enable = true;
  #   dnssec = "true";
  #   domains = [ "~." ];
  #   fallbackDns = [ "192.168.1.180" ];
  #   dnsovertls = "true";
  # };

  # Enable the OpenSSH daemon.
  services.openssh.enable = true;

  # ─── Virtualization ─────────────────────────────────────────────────────────
  virtualisation.libvirtd.enable = true;

  # ─── Udev Rules ─────────────────────────────────────────────────────────────
  services.udev.packages = [
    pkgs.platformio-core
    pkgs.platformio
    pkgs.openocd
    #pkgs.brave
  ];

  # services.udev.extraRules = ''
  #   KERNEL=="hidraw*", KERNELS=="*054C:0CE6*", MODE="0660", TAG+="uaccess"
  # '';
}