home/hosts/odin/system/default.nix

{
  config,
  inputs,
  pkgs,
  ...
}:
{
  imports = [
    inputs.nixos-facter-modules.nixosModules.facter
    { config.facter.reportPath = ./facter.json; }

    ./age.nix
    ./disko.nix
    ./hd-idle.nix
    ./impermanence.nix
    ./mergerfs.nix
  ];

  environment.systemPackages = [
    config.boot.kernelPackages.cpupower
    config.boot.kernelPackages.turbostat
  ];

  boot = {
    loader.systemd-boot.enable = true;
    loader.efi.canTouchEfiVariables = true;
    loader.grub.devices = [ config.disko.devices.disk.main.device ];
    loader.timeout = 3;

    blacklistedKernelModules = [ "k10temp" ];
    extraModulePackages = [ config.boot.kernelPackages.zenpower ];
    kernelParams = [
      "rootflags=compress=zstd:1,noatime"
      "amd_pstate=active"
    ];
    kernelModules = [
      "zenpower"
      "nct6775"
    ];

    kernel.sysctl = {
      "kernel.sysrq" = 1;
      "vm.swappiness" = 10;
      "net.core.default_qdisc" = "cake";
    };

  };

  hardware.fancontrol = {
    enable = true;
    config = ''
      INTERVAL=10
      DEVPATH=hwmon2=devices/pci0000:00/0000:00:18.3 hwmon3=devices/platform/nct6775.656
      DEVNAME=hwmon2=zenpower hwmon3=nct6798
      FCTEMPS=hwmon3/pwm7=hwmon2/temp1_input  hwmon3/pwm2=hwmon2/temp1_input
      FCFANS=hwmon3/pwm7=hwmon3/fan7_input  hwmon3/pwm2=hwmon3/fan2_input
      MINTEMP=hwmon3/pwm7=40  hwmon3/pwm2=30
      MAXTEMP=hwmon3/pwm7=85  hwmon3/pwm2=80
      MINSTART=hwmon3/pwm7=95  hwmon3/pwm2=150
      MINSTOP=hwmon3/pwm7=75  hwmon3/pwm2=0
      MINPWM= hwmon3/pwm7=0
      MAXPWM=hwmon3/pwm7=255  hwmon3/pwm2=255
    '';
  };

  services = {
    udev.packages = [ pkgs.nct6775-pwm-udev-package ];
    hddfancontrol.enable = true;
    hddfancontrol.settings = {
      harddrives =
        let
          devices = config.disko.devices.disk;
        in
        {
          disks = [
            devices.parity1.device
            devices.data1.device
            devices.data2.device
          ];
          pwmPaths = [
            "/run/hwmon/pwm1:20:0"
            "/run/hwmon/pwm4:80:60"
          ];
          logVerbosity = "DEBUG";
          extraArgs = [
            "--min-fan-speed-prct"
            "0"
            "--drive-temp-range"
            "30"
            "50"
          ];
        };
    };
  };

  # Btrfs maintenance
  services.btrfs.autoScrub = {
    enable = true;
    interval = "monthly";
    fileSystems = [ "/" ];
  };
}