{ pkgs, config, lib, ... }:
let
  cfg = config.grimmShared;
  screen = with lib; types.submodule {
    options = {
      fps = mkOption {
        type = types.int;
        default = 60;
        description = "max framerate of screen";
      };

      mode = mkOption {
        type = types.nonEmptyStr;
        default = "1920x1080";
        description = "pixel format of the screen";
      };

      id = mkOption {
        type = types.nonEmptyStr;
        description = "ID of the screen";
      };

      pos = mkOption {
        type = types.nullOr types.nonEmptyStr;
        default = null;
        example = "0,0";
        description = "position where to place the screen";
      };
    };
  };
in
{
  config = with cfg; lib.mkIf (enable && graphical) {
    # Enable OpenGL
    hardware.opengl = {
      enable = true;
      driSupport = true;
      driSupport32Bit = true;
      extraPackages = with pkgs; [ ];
    };

    boot.kernelParams = [ "nouveau.config=NvGspRm=1" ];

    environment.sessionVariables = {
      __GL_LOG_MAX_ANISO = "0";
      __GL_SHADER_DISK_CACHE = "1";
      __GL_SYNC_TO_VBLANK = "0";
      __GL_THREADED_OPTIMIZATIONS = "1";
      __GL_VRR_ALLOWED = "1";
      #     MESA_LOADER_DRIVER_OVERRIDE="zink";
      #     FLATPAK_GL_DRIVERS="mesa-git";
    };

    environment.systemPackages = with pkgs; [
      glfw
    ];
  };


  options.grimmShared = with lib; {
    graphical = mkOption {
      type = types.bool;
      default = cfg.screens != { };
      description = "whether to force enable graphical components";
    };

    screens = mkOption {
      type = types.attrsOf screen;
      default = { };
      description = "Screens to initialize, will activate graphical components";
    };
  };
}