{ config, lib, ... }:
let
  inherit (lib) mkOption types;
  optionalAttrs = lib.attrsets.optionalAttrs;
  hw = config.valhalla.hardware;
in {
  options = {
    valhalla = {
      hardware = {
        components = mkOption {
          type = types.listOf types.str;
          description = "The names of the hardware components of the computer.";
          default = [ ];
        };

        surfaceBook = mkOption {
          type = types.bool;
          description = "A value indicating whether the system is a Surface Book 2.";
          default = false;
        };

        xoneReceiver = mkOption {
          type = types.bool;
          description = "A value indicating whether an Xbox receiver is present.";
          default = false;
        };

        eyeX = mkOption {
          type = types.bool;
          description = "A value indicating whether a Tobii EyeX device is present.";
          default = false;
        };

        amdCPU = mkOption {
          type = types.bool;
          description = "A value indicating whether an AMD CPU is present.";
          default = false;
        };

        nvidiaGPU = mkOption {
          type = types.bool;
          description = "A value indicating whether an NVIDIA GPU is present.";
          default = false;
        };

        corsairDevice = mkOption {
          type = types.bool;
          description = "A value indicating whether a Corsair device is present.";
          default = false;
        };

        elgatoWave = mkOption {
          type = types.bool;
          description = "A value indicating whether an Elgato Wave device is present.";
          default = false;
        };
      };
    };
  };

  config = {
    valhalla = {
      linux.programs = (optionalAttrs hw.nvidiaGPU {
        nvidia-dkms.enable = true;
      }) // (optionalAttrs hw.xoneReceiver {
        xone.enable = true;
      });

      windows.programs = (optionalAttrs hw.eyeX {
        tobii-gamehub.enable = lib.mkDefault true;
        tobii-ghost.enable = lib.mkDefault true;
      });
    };
  };
}