# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

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

let 
  nvidia_grid_version = "535.288.01";
  nvidia_grid_sha256 = "06jbq7hmzynrysxwac34sm0700137k2lliw789q1lkxb7dvzxyg7";
in
{
  imports =
    [ # Include the results of the hardware scan.
      /etc/nixos/hardware-configuration.nix
    ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.kernelPackages = pkgs.linuxPackages_6_12;
  boot.blacklistedKernelModules = [ "nouveau" ];
  boot.kernelModules = [ "uinput" ];

  boot.supportedFilesystems = [ "nfs" ];
  services.rpcbind.enable = true; # needed for NFS

  services.sunshine = {
    enable = true;
    autoStart = true;
    capSysAdmin = true; # Sunshine이 가상 입력을 제어하기 위해 필요
    openFirewall = true; # Sunshine 포트(47984-48010) 자동 허용
  };

  # 2. XDG Desktop Portal 설정 (libei의 통로 역할을 합니다)
  xdg.portal = {
    enable = true;
    wlr.enable = true; # Sway(wlroots) 전용 포털
    extraPortals = [ 
      pkgs.xdg-desktop-portal-gtk 
      pkgs.libei # libei 패키지 명시적 포함
    ];
    config.common.default = "*";
  };

  # 3. 환경 변수 추가 (Sway가 libei를 인식하도록 함)
  environment.variables = {
    "LIBEI_SOCKET" = "1";
    "WLR_LIBSEAT_BACKEND" = "seatd";
  };

  services.udev.extraRules = ''
    KERNEL=="uinput", GROUP="input", MODE="0666", OPTIONS+="static_node=uinput"
  '';

  systemd.user.services.mango = {
  description = "mango Headless Session";
  wantedBy = [ "default.target" ];
  serviceConfig = {
    # Wayland 헤드리스 백엔드 강제 사용
    Environment = [
      "WLR_BACKENDS=headless"
      "WLR_LIBINPUT_NO_DEVICES=1"
      "WLR_LIBSEAT_BACKEND=libseat"
      "XDG_SESSION_TYPE=wayland"
      "XDG_CURRENT_DESKTOP=mango"
    ];
    # Sway 실행 (가상 디스플레이 1개 생성)
    ExecStart = "dbus-run-session mango";
    Restart = "always";
  };
};

  # 유저 세션이 로그아웃 되어도 서비스가 유지되도록 설정
  users.users.bangae1.linger = true;

  systemd.mounts = [{
    type = "nfs";
    mountConfig = {
      Options = "noatime";
    };
    what = "192.168.0.137:/mnt/user1/book";
    where = "/book";
  }];

  systemd.automounts = [{
    wantedBy = [ "multi-user.target" ];
    automountConfig = {
      TimeoutIdleSec = "600";
    };
    where = "/book";
  }];

  networking.hostName = "nixos"; # Define your hostname.

  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "Asia/Seoul";

  # Select internationalisation properties.
  i18n.defaultLocale = "ko_KR.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "ko_KR.UTF-8";
    LC_IDENTIFICATION = "ko_KR.UTF-8";
    LC_MEASUREMENT = "ko_KR.UTF-8";
    LC_MONETARY = "ko_KR.UTF-8";
    LC_NAME = "ko_KR.UTF-8";
    LC_NUMERIC = "ko_KR.UTF-8";
    LC_PAPER = "ko_KR.UTF-8";
    LC_TELEPHONE = "ko_KR.UTF-8";
    LC_TIME = "ko_KR.UTF-8";
  };

  # Configure keymap in X11
  services.xserver.xkb = {
    layout = "us";
    variant = "";
  };

  #services.displayManager.sddm.enable = true;
  #services.displayManager.sddm.wayland.enable = true;
  hardware.graphics.enable = true; # Required for graphics acceleration


  # 2. NVIDIA 드라이버 설정
  services.xserver.videoDrivers = [ "nvidia" ];

  hardware.nvidia = {
    open = false;
    # GRID 드라이버 패키지 오버라이드
    package = config.boot.kernelPackages.nvidiaPackages.stable.overrideAttrs (oldAttrs: {
      version = nvidia_grid_version;
      src = pkgs.fetchurl {
        url = "file:///home/bangae1/mango/NVIDIA-Linux-x86_64-${nvidia_grid_version}-grid.run";
        sha256 = nvidia_grid_sha256;
      };
    });
    
    # GRID 기능을 위한 필수 설정
    modesetting.enable = true;
    powerManagement.enable = false;
  };

  boot.kernelParams = [ "nvidia.NVreg_EnableVideoMemorySelfRefresh=1" "nvidia.NVreg_OpenRm=0" ];

  systemd.services.nvidia-gridd = {
    description = "NVIDIA Grid Daemon";
    after = [ "network.target" ];
    wantedBy = [ "multi-user.target" ];
    
    serviceConfig = {
      Type = "forking";
      # 드라이버 패키지 경로에서 gridd 바이너리를 찾아 실행합니다.
      ExecStart = "${config.hardware.nvidia.package}/bin/nvidia-gridd";
      Restart = "on-failure";
    };
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.bangae1 = {
    isNormalUser = true;
    description = "bangae1";
    extraGroups = [ "networkmanager" "wheel" "input" "video" "seat" ];
    packages = with pkgs; [];
  };

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  environment.systemPackages = with pkgs; [
  #  vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
  #  wget
    code
    git
    unzip
    fish
    eza
    nfs-utils
    ydotool
    grim
    kime
    wlr-randr
    kitty
    sunshine
  ];

  fonts.packages = with pkgs; [
    nerd-fonts.jetbrains-mono
  ];

  environment.etc."nvidia/gridd.conf".text = ''
    ServerAddress=192.168.0.216
    ServerPort=443
    FeatureType=1
  '';

  nix.settings.experimental-features = [ "nix-command" "flakes" ];

  programs.firefox.enable = true;

  programs.fish.enable = true;

  programs.nano.nanorc = ''
    set tabsize 2
    set tabstospaces
  '';


  services.openssh.enable = true;

  system.stateVersion = "25.11"; # Did you read the comment?

}