nixos/hosts/FredOS-Macbook.nix

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

{
  config = lib.mkIf (config.networking.hostName == "FredOS-Macbook") {
    environment.systemPackages = with pkgs; [
      tlp
      vesktop
      adwaita-icon-theme
      mission-center
      vlc
      gnome-text-editor
      proton-vpn
      onlyoffice-desktopeditors
      woeusb
      vscodium
    ];

    programs.geary.enable = true;

    nix.settings.max-jobs = 0;

    services.tlp.enable = false;
    services.power-profiles-daemon.enable = true;

    boot.loader.systemd-boot.configurationLimit = 5;
    boot.initrd.systemd.enable = true;

    # Allow video group (fred) to write to /sys/class/backlight and /sys/class/leds
    # (screen brightness and keyboard backlight)
    hardware.acpilight.enable = true;

    services.logind.settings.Login = {
      HandleLidSwitch = "suspend";
      HandleLidSwitchExternalPower = "suspend";
    };

    # Disable-while-typing daemon for the bcm5974 touchpad.
    # Hyprland's built-in DWT doesn't work because the keyboard and
    # touchpad share the same USB device, breaking libinput's pairing.
    # A libinput quirk (AttrKeyboardIntegration=internal) was tried but
    # caused libinput to permanently inhibit the touchpad.
    systemd.services.macbook-dwt = {
      description = "Disable touchpad while typing (bcm5974)";
      after = [ "systemd-udevd.service" ];
      wantedBy = [ "multi-user.target" ];
      serviceConfig = {
        Type = "simple";
        Restart = "on-failure";
        RestartSec = 3;
        ExecStopPost = pkgs.writeShellScript "dwt-uninhibit" ''
          for p in /sys/class/input/event*/device/name; do
            if grep -q bcm5974 "$p" 2>/dev/null; then
              echo 0 > "''${p%/name}/inhibited"
            fi
          done
          true
        '';
        ExecStart = "${pkgs.python3.withPackages (p: [])}/bin/python3 ${pkgs.writeText "macbook-dwt.py" ''
import glob, os, select, struct, time

EVENT_SIZE = struct.calcsize("llHHi")
EV_KEY = 0x01
DWT_TIMEOUT = 0.4
# Modifier keycodes — don't inhibit touchpad for these
MODIFIERS = {42, 54, 29, 97, 56, 100, 125, 126}  # L/R Shift, Ctrl, Alt, Super

def find_event(name):
    for p in sorted(glob.glob("/sys/class/input/event*/device/name")):
        with open(p) as f:
            if name in f.read():
                return p.split("/")[4]
    return None

def main():
    tp = find_event("bcm5974")
    kb = find_event("Apple Internal Keyboard")
    if not tp or not kb:
        raise SystemExit(f"Devices not found: touchpad={tp}, keyboard={kb}")

    inhibit = f"/sys/class/input/{tp}/device/inhibited"
    active = False
    last_key = 0.0

    with open(f"/dev/input/{kb}", "rb") as f:
        try:
            while True:
                timeout = max(0, DWT_TIMEOUT - (time.monotonic() - last_key)) if active else None
                r, _, _ = select.select([f], [], [], timeout)
                if r:
                    data = os.read(f.fileno(), EVENT_SIZE * 64)
                    for off in range(0, len(data) - EVENT_SIZE + 1, EVENT_SIZE):
                        _, _, typ, code, val = struct.unpack("llHHi", data[off:off + EVENT_SIZE])
                        if typ == EV_KEY and val and code not in MODIFIERS:
                            last_key = time.monotonic()
                            if not active:
                                open(inhibit, "w").write("1")
                                active = True
                if active and time.monotonic() - last_key >= DWT_TIMEOUT:
                    open(inhibit, "w").write("0")
                    active = False
        finally:
            open(inhibit, "w").write("0")

main()
''}";
      };
    };

    home-manager.users.fred = { pkgs, ... }: {
      wayland.windowManager.hyprland.settings.monitor = [{
        output   = "";
        mode     = "preferred";
        position = "auto";
        scale    = "auto";
      }];

      # wob reads 0-100 integers from a FIFO and shows a progress bar overlay
      systemd.user.services.wob = {
        Unit = {
          Description = "Wayland OSD Bar";
          After = [ "graphical-session.target" ];
          PartOf = [ "graphical-session.target" ];
        };
        Service = {
          Type = "simple";
          ExecStart = "${pkgs.writeShellScript "wob-start" ''
            rm -f "%t/wob.fifo"
            mkfifo "%t/wob.fifo"
            tail -f "%t/wob.fifo" | ${pkgs.wob}/bin/wob
          ''}";
          ExecStopPost = "${pkgs.coreutils}/bin/rm -f %t/wob.fifo";
          Restart = "on-failure";
        };
        Install.WantedBy = [ "graphical-session.target" ];
      };

      systemd.user.services.ghostty-daemon = {
        Unit = {
          Description = "Ghostty warm instance (no window)";
          After = [ "graphical-session.target" ];
          PartOf = [ "graphical-session.target" ];
        };
        Service = {
          Type = "simple";
          ExecStart = "${pkgs.ghostty}/bin/ghostty --initial-window=false";
          Restart = "always";
        };
        Install.WantedBy = [ "graphical-session.target" ];
      };

      systemd.user.services.nemo-warmup = {
        Unit = {
          Description = "Pre-warm Nemo file manager libraries";
          After = [ "graphical-session.target" ];
          PartOf = [ "graphical-session.target" ];
        };
        Service = {
          Type = "oneshot";
          ExecStart = "${pkgs.nemo}/bin/nemo --quit";
        };
        Install.WantedBy = [ "graphical-session.target" ];
      };

      systemd.user.services.kbd-backlight-init = {
        Unit = {
          Description = "Set keyboard backlight to 10% on login";
          After = [ "graphical-session.target" ];
          PartOf = [ "graphical-session.target" ];
        };
        Service = {
          Type = "oneshot";
          ExecStart = "${pkgs.brightnessctl}/bin/brightnessctl -d smc::kbd_backlight set 10%";
        };
        Install.WantedBy = [ "graphical-session.target" ];
      };
    };
  };
}