# Do not modify this file!  It was generated by ‘nixos-generate-config’
# and may be overwritten by future invocations.  Please make changes
# to /etc/nixos/configuration.nix instead.
{ config, lib, pkgs, modulesPath, ... }:
{
  imports = [ 
    (modulesPath + "/installer/scan/not-detected.nix")
  ];

  boot.loader.systemd-boot = {
    enable = true;
    configurationLimit = 5;
  };
  boot.loader.efi.canTouchEfiVariables = true;
  boot.initrd.availableKernelModules = [ "vfat" "xhci_pci" "thunderbolt" "usb_storage" "sd_mod" ];
  boot.initrd.kernelModules = [ "kvm-amd" ];
  boot.kernelModules = [ "amdgpu" ];
  boot.extraModulePackages = [ ];

  # AMD Ryzen 7 7840U optimizations
  boot.kernelParams = [
    "amd_pstate=active"
    "amd_pstate.shared_mem=1"
    "amdgpu.dcdebugmask=0x10"
    "amdgpu.dc=1"
    "amdgpu.ppfeaturemask=0xffffffff"
    "amdgpu.gpu_recovery=1"
    "snd_hda_intel.power_save=1"
    "transparent_hugepage=madvise"
    "pcie_aspm=force"
    "nvme.noacpi=1"
  ];

  fileSystems."/" = {
    device = "none";
    fsType = "tmpfs";
    options = [ "size=16G" "mode=755" ];
  };

  boot.initrd = {
    luks.devices."root" = {
      crypttabExtraOpts = [ "fido2-device=auto" ];
      device = "/dev/disk/by-label/root";
    };
    systemd.enable = true;
  };

	fileSystems."/boot" = {
		device = "/dev/disk/by-label/boot";
		fsType = "vfat";
	};

  fileSystems."/nix"  = {
    device = "/dev/mapper/root";
    fsType = "btrfs";
    neededForBoot = true;
    options = [
      "subvol=@"
      "ssd"
      "compress=zstd:1"
      "discard=async"
      "noatime"
      "commit=120"
    ];
  };

  fileSystems."/nix/store" = {
    device = "/dev/mapper/root";
    fsType = "btrfs";
    neededForBoot = true;
    options = [
      "subvol=@nix-store"
      "ssd"
      "compress=zstd:1"
      "discard=async"
      "noatime"
      "commit=120"
    ];
  };

  fileSystems."/nix/persist"  = {
    device = "/dev/mapper/root";
    fsType = "btrfs";
    neededForBoot = true;
    options = [
      "subvol=@nix-persist"
      "ssd"
      "compress=zstd:1"
      "discard=async"
      "noatime"
      "commit=120"
    ];
  };

  swapDevices = [ ];

  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
  # (the default) this is the recommended approach. When using systemd-networkd it's
  # still possible to use this option, but it's recommended to use it in conjunction
  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
  networking.useDHCP = lib.mkDefault true;
  # networking.interfaces.wlp52s0.useDHCP = lib.mkDefault true;

  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;

  hardware.graphics = {
    enable = true;
    extraPackages = with pkgs; [
      vaapiVdpau
      libvdpau-va-gl
      libva
      libva-utils
    ];
  };

  # Optimal I/O scheduler for NVMe SSDs
  services.udev.extraRules = ''
    ACTION=="add|change", KERNEL=="nvme[0-9]*", ATTR{queue/scheduler}="none"
  '';
}