home/hosts/odin/system/default.nix

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

    ./age.nix
    ./disko.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";
    };

    initrd.services.udev.rules = ''
      ACTION=="add", SUBSYSTEM=="hwmon", DEVPATH=="/devices/platform/*/hwmon/hwmon*", \
      MODE="0660", GROUP="plugdev", \
      RUN+="/bin/sh -c 'for pwm in $(find /sys%p -name \"pwm[0-9]*\" | sort); do \
          num=$(echo \"$pwm\" | sed -n \"s/.*pwm\([0-9]\+\).*/\1/p\"); \
          ln -sf \"$pwm\" \"/dev/pwm$num\"; \
      done'"
    '';
  };

  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.hddfancontrol.enable = true;
  services.hddfancontrol.settings = {
    harddrives =
      let
        devices = config.disko.devices.disk;
      in
      {
        disks = [
          devices.parity1.device
          devices.data1.device
          devices.data2.device
        ];
        pwmPaths = [
          "/sys/class/hwmon/hwmon[[:print:]]*/pwm1:20:0"
          "/sys/class/hwmon/hwmon[[:print:]]*/pwm4:80:60"
        ];
        logVerbosity = "DEBUG";
        extraArgs = [
          "--min-fan-speed-prct=0"
        ];
      };
  };

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