{ pkgs, config, lib, system, ... }:
let
  cfg = config.grimmShared;
  inherit (lib) optionals optional optionalString concatLines getExe;
  inherit (config.boot.kernelPackages) x86_energy_perf_policy cpupower;
  enable_perf_policy = (lib.elem system x86_energy_perf_policy.meta.platforms);

  powersave = with pkgs; 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 cfg.sway.enable "init-screens-min"));

  performance = pkgs.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 cfg.sway.enable "init-screens-max"));
  auto = let inherit (pkgs) tlp; in pkgs.writeShellScriptBin "auto-mode" ''
    ${tlp}/bin/run-on-ac ${getExe performance}
    ${tlp}/bin/run-on-bat ${getExe powersave}
  '';
in
{
  config = with cfg; lib.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";
      };
    };
  };
}