{
  pkgs,
  config,
  lib,
  system,
  ...
}:
let
  inherit (lib)
    optionals
    optional
    concatLines
    getExe
    getExe'
    elem
    mkIf
    ;
  inherit (pkgs) writeShellScriptBin tlp tlpui;
  inherit (config.grimmShared)
    enable
    laptop_hardware
    graphical
    sway
    ;
  inherit (config.boot.kernelPackages) x86_energy_perf_policy cpupower;
  enable_perf_policy = (elem system x86_energy_perf_policy.meta.platforms);

  powersave = writeShellScriptBin "powersave-mode" (
    concatLines (
      [
        "${getExe cpupower} frequency-set -g powersave -u 2000000" # clock speed
        "${getExe pkgs.brightnessctl} s 20%" # display brightness
      ]
      ++ optionals enable_perf_policy [
        "${getExe x86_energy_perf_policy} 15" # power save preference
        "${getExe x86_energy_perf_policy} --turbo-enable 0" # disable turbo
      ]
      ++ optional sway.enable "init-screens-min"
    )
  );

  performance = writeShellScriptBin "performance-mode" (
    concatLines (
      [
        "${getExe cpupower} frequency-set frequency-set -g performance -u 5000000" # clock speed
        "${getExe pkgs.brightnessctl} s 100%" # display brightness
      ]
      ++ optionals enable_perf_policy [
        "${getExe x86_energy_perf_policy} 0" # performance preference
        "${getExe x86_energy_perf_policy} --turbo-enable 1" # enable turbo
      ]
      ++ optional sway.enable "init-screens-max"
    )
  );
  auto = writeShellScriptBin "auto-mode" ''
    ${getExe' tlp "run-on-ac"} ${getExe performance}
    ${getExe' tlp "run-on-bat"} ${getExe powersave}
  '';
in
{
  config = mkIf (enable && laptop_hardware.enable) {
    environment.systemPackages =
      (with pkgs; [
        acpi
        powertop
        brightnessctl
      ])
      ++ [
        cpupower
        powersave
        performance
        auto
      ]
      ++ optionals graphical [ tlpui ]
      ++ optional enable_perf_policy x86_energy_perf_policy;

    services.acpid = {
      enable = true;
      acEventCommands = getExe auto;
    };

    powerManagement.scsiLinkPolicy = lib.mkIf (!config.services.tlp.enable) "min_power";
    powerManagement.cpuFreqGovernor = lib.mkDefault "normal";

    services.power-profiles-daemon.enable = false;
    services.upower.enable = true;
    boot.extraModulePackages = [ cpupower ] ++ optional enable_perf_policy x86_energy_perf_policy;

    services.tlp = {
      enable = true;
      settings = {
        USB_AUTOSUSPEND = 1;
        USB_EXCLUDE_BTUSB = 1;
        USB_EXCLUDE_PHONE = 1;
        SOUND_POWER_SAVE_ON_AC = 0;
        SOUND_POWER_SAVE_ON_BAT = 1;
        SATA_LINKPWR_ON_AC = "max_performance";
        SATA_LINKPWR_ON_BAT = "min_power";
        MAX_LOST_WORK_SECS_ON_BAT = 15;
        CPU_ENERGY_PERF_POLICY_ON_AC = "performance";
        CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
        CPU_BOOST_ON_AC = 1;
        CPU_BOOST_ON_BAT = 0;
        RUNTIME_PM_ON_AC = "on";
        RUNTIME_PM_ON_BAT = "auto";
      };
    };
  };
}