{ pkgs, ... }:

let
  user = "sunshine";
  configFile = pkgs.writeText "sunshine.conf"
    ''
      output_name=1
      origin_web_ui_allowed=lan
      channels=2
      min_threads=12
      global_prep_cmd=[{"do":"/run/current-system/sw/bin/sh -c \"/run/current-system/sw/bin/xrandr --output DP-0 --mode \"''${SUNSHINE_CLIENT_WIDTH}x''${SUNSHINE_CLIENT_HEIGHT}\" --rate ''${SUNSHINE_CLIENT_FPS}\""}]
    '';
  sunshineOverride = pkgs.sunshine.override { cudaSupport = true; stdenv = pkgs.cudaPackages.backendStdenv; };
in
{
  security = {
    polkit.extraConfig = ''
      polkit.addRule(function(action, subject) {
          if (action.id == "org.freedesktop.login1.suspend" ||
              action.id == "org.freedesktop.login1.suspend-multiple-sessions" ||
              action.id == "org.freedesktop.login1.hibernate" ||
              action.id == "org.freedesktop.login1.hibernate-multiple-sessions")
          {
              return polkit.Result.NO;
          }
      });
    '';
  };

  systemd.targets = {
    sleep.enable = false;
    suspend.enable = false;
    hibernate.enable = false;
    hybrid-sleep.enable = false;
  };

  environment.systemPackages = with pkgs; [
    sunshineOverride
    xorg.xrandr
    xorg.xorgserver
  ];
  sound.enable = true;
  hardware.pulseaudio.enable = true;

  services.xserver = {
    enable = true;
    videoDrivers = [ "nvidia" ];

    displayManager = {
      sddm = {
        enable = true;
        wayland.enable = false;
        autoLogin.relogin = true;
      };
      autoLogin = {
        inherit user;
        enable = true;
      };
    };
    desktopManager.xfce.enable = true;

    monitorSection = ''
      HorizSync       5.0 - 1000.0
      VertRefresh     5.0 - 1000.0
      Option         "DPMS"
    '';

    deviceSection = ''
      VendorName  "NVIDIA Corporation"
      Option      "CustomEDID" "DFP-1:/etc/X11/120edid.bin"
      Option "ConnectedMonitor" "DFP-1"
    '';

    screenSection = ''
      Monitor         "Configured Monitor"
      DefaultDepth    24

      Option "ModeValidation" "NoVertRefreshCheck, NoHorizSyncCheck, NoMaxSizeCheck, NoMaxPClkCheck, AllowNonEdidModes, NoEdidMaxPClkCheck"
      
      SubSection     "Display"
          Depth       24
      EndSubSection
    '';
  };

  # Sunshine user, service and config 
  users.users.${user} = {
    isNormalUser = true;
    home = "/home/${user}";
    description = "Sunshine Server";
    extraGroups = [ "wheel" "networkmanager" "input" "video" "sound" ];
    openssh.authorizedKeys.keys = [ "ssh-rsa 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 giulio@giulio-X230" ];
  };


  systemd.user.services.${user} = {
    description = "Sunshine server";
    wantedBy = [ "graphical-session.target" ];
    startLimitIntervalSec = 500;
    startLimitBurst = 5;
    partOf = [ "graphical-session.target" ];
    wants = [ "graphical-session.target" ];
    after = [ "graphical-session.target" ];

    serviceConfig = {
      ExecStart = "${sunshineOverride}/bin/sunshine ${configFile}";
      Restart = "on-failure";
      RestartSec = "5s";
    };
  };

  services.avahi.publish.userServices = true;
  boot.kernelModules = [ "uinput" ];

  programs.steam.enable = true;

  hardware = {
    opengl = {
      enable = true;
      driSupport = true;
      driSupport32Bit = true;
    };

    nvidia = {
      modesetting.enable = true;
      powerManagement.enable = false;
      powerManagement.finegrained = false;
      open = false;
      nvidiaSettings = true;
    };
  };

  users.groups.media.members = [ user ];
}