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

let
  cfg = config.programs.coolercontrol;
in
{
  ##### interface
  options = {
    programs.coolercontrol = {
      enable = lib.mkEnableOption "CoolerControl GUI & its background services";

      nvidiaSupport = lib.mkOption {
        type = lib.types.bool;
        default = lib.elem "nvidia" config.services.xserver.videoDrivers;
        defaultText = lib.literalExpression "lib.elem \"nvidia\" config.services.xserver.videoDrivers";
        description = ''
          Enable support for Nvidia GPUs.
        '';
      };
    };
  };

  ##### implementation
  config = lib.mkIf cfg.enable (lib.mkMerge [
    # Common
    ({
      environment.systemPackages = with pkgs.coolercontrol; [
        coolercontrol-gui
      ];

      systemd = {
        packages = with pkgs.coolercontrol; [
          coolercontrol-liqctld
          coolercontrold
        ];

        # https://github.com/NixOS/nixpkgs/issues/81138
        services = {
          coolercontrol-liqctld.wantedBy = [ "multi-user.target" ];
          coolercontrold.wantedBy = [ "multi-user.target" ];
        };
      };
    })

    # Nvidia support
    (lib.mkIf cfg.nvidiaSupport {
      systemd.services.coolercontrold.path = let
        nvidiaPkg = config.hardware.nvidia.package;
      in [
        nvidiaPkg # nvidia-smi
        nvidiaPkg.settings # nvidia-settings
      ];
    })
  ]);

  meta.maintainers = with lib.maintainers; [ OPNA2608 codifryed ];
}