{
  config,
  sources,
  lib,
  pkgs,
  ...
}:
let
  inherit (lib.modules) mkDefault;
in
{
  imports = [
    # (sources.watt + "/nix/module.nix")
  ];
  config = {
    environment.systemPackages = builtins.attrValues {
      inherit (pkgs)
        acpi
        powertop
        ;
    };

    boot = {
      kernelModules = [ "acpi_call" ];
      extraModulePackages = with config.boot.kernelPackages; [
        acpi_call
        cpupower
      ];
    };

    hardware.acpilight.enable = false;

    # services.watt = {
    #   enable = true;
    #   # sample config from https://github.com/NotAShelf/watt#sample-configuration
    #   settings = {
    #     rule = [
    #       {
    #         cpu = {
    #           energy-performance-preference = "power";
    #           frequency-mhz-maximum = 2000;
    #           governor = "powersave";
    #           turbo = false;
    #         };
    #         "if" = {
    #           is-more-than = 85;
    #           value = "$cpu-temperature";
    #         };
    #         priority = 100;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-preference = "power";
    #           frequency-mhz-maximum = 800;
    #           governor = "powersave";
    #           turbo = false;
    #         };
    #         "if" = {
    #           all = [
    #             "?discharging"
    #             {
    #               is-less-than = 0.3;
    #               value = "%power-supply-charge";
    #             }
    #           ];
    #         };
    #         power = {platform-profile = "low-power";};
    #         priority = 90;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-preference = "performance";
    #           governor = "performance";
    #           turbo = true;
    #         };
    #         "if" = {
    #           all = [
    #             {
    #               is-more-than = 0.8;
    #               value = "%cpu-usage";
    #             }
    #             {
    #               is-less-than = 30;
    #               value = "$cpu-idle-seconds";
    #             }
    #             {
    #               is-less-than = 75;
    #               value = "$cpu-temperature";
    #             }
    #           ];
    #         };
    #         priority = 80;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-bias = "balance_performance";
    #           energy-performance-preference = "performance";
    #           governor = "performance";
    #           turbo = true;
    #         };
    #         "if" = {
    #           all = [
    #             {not = "?discharging";}
    #             {
    #               is-more-than = 0.1;
    #               value = "%cpu-usage";
    #             }
    #             {
    #               is-less-than = 80;
    #               value = "$cpu-temperature";
    #             }
    #           ];
    #         };
    #         priority = 70;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-preference = "balance_performance";
    #           governor = "schedutil";
    #         };
    #         "if" = {
    #           all = [
    #             {
    #               is-more-than = 0.4;
    #               value = "%cpu-usage";
    #             }
    #             {
    #               is-less-than = 0.8;
    #               value = "%cpu-usage";
    #             }
    #           ];
    #         };
    #         priority = 60;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-preference = "power";
    #           governor = "powersave";
    #           turbo = false;
    #         };
    #         "if" = {
    #           all = [
    #             {
    #               is-less-than = 0.2;
    #               value = "%cpu-usage";
    #             }
    #             {
    #               is-more-than = 60;
    #               value = "$cpu-idle-seconds";
    #             }
    #           ];
    #         };
    #         priority = 50;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-preference = "power";
    #           frequency-mhz-maximum = 1600;
    #           governor = "powersave";
    #           turbo = false;
    #         };
    #         "if" = {
    #           is-more-than = 300;
    #           value = "$cpu-idle-seconds";
    #         };
    #         priority = 40;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-preference = "power";
    #           frequency-mhz-maximum = 2000;
    #           governor = "powersave";
    #           turbo = false;
    #         };
    #         "if" = {
    #           all = [
    #             "?discharging"
    #             {
    #               is-less-than = 0.5;
    #               value = "%power-supply-charge";
    #             }
    #           ];
    #         };
    #         power = {platform-profile = "low-power";};
    #         priority = 30;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-bias = "balance_power";
    #           energy-performance-preference = "power";
    #           frequency-mhz-maximum = 1800;
    #           frequency-mhz-minimum = 200;
    #           governor = "powersave";
    #           turbo = false;
    #         };
    #         "if" = "?discharging";
    #         priority = 20;
    #       }
    #       {
    #         cpu = {
    #           energy-performance-preference = "balance_performance";
    #           governor = "schedutil";
    #         };
    #         priority = 0;
    #       }
    #     ];
    #   };
    # };
    services = {
      upower = {
        enable = true;
        percentageLow = 15;
        percentageCritical = 5;
      };

      acpid = {
        enable = true;
        logEvents = true;
      };

      auto-cpufreq = {
        enable = false;
        settings = {
          charger = {
            governor = "performance";
            energy_performance_preference = "performance";
            scaling_min_freq = mkDefault 1800000;
            scaling_max_freq = mkDefault 3800000;
            turbo = "auto";
          };

          battery = {
            governor = "powersave";
            energy_performance_preference = "power";
            scaling_min_freq = mkDefault 1200000;
            scaling_max_freq = mkDefault 1800000;
            turbo = "never";
          };
        };
      };
    };
  };
}