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

with lib;
let
  cfg = config.drivers.nvidia-prime;
in
{
  options.drivers.nvidia-prime = {
    enable = mkEnableOption "enable nvidia prime hybrid gpu offload";
    intelBusID = mkOption {
      type = types.str;
      default = "PCI:1:0:0";
    };
    nvidiaBusID = mkOption {
      type = types.str;
      default = "PCI:0:2:0";
    };
  };

  config = mkIf cfg.enable {
    hardware.nvidia = {
      prime = {
        offload = {
          enable = true;
          enableOffloadCmd = true;
        };
        # make sure to use the correct BusID values for your system!!!
        intelBusID = "${cfg.intelBusID}";
        nvidiaBusID = "${cfg.nvidiaBusID}";
      };
    };
  };
}