# Edit this configuration file to define what should be installed on
# your system. Help is available in the configuration.nix(5) man page, on
# https://search.nixos.org/options and in the NixOS manual (`nixos-help`).

{ config, lib, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
      ./disk-config.nix
      { 
        _module.args = {
          disk = "/dev/vda";
          withSwap = true;
          swapSize = "16";
        };
      }

    ];

  # Experimental
  nix.settings.experimental-features = [ "nix-command" "flakes" ];
  
  # I18n & Time
  time.timeZone = "Europe/Amsterdam";
  i18n.defaultLocale = "en_US.UTF-8";

  # Starter config
  console = {
    font = "Lat2-Terminus16";
    keyMap = "us";
  #  useXkbConfig = true; # use xkb.options in tty.
  };
  
  # Enable the KDE Desktop Environment.
  services.xserver.displayManager.sddm.enable = true;
  services.xserver.desktopManager.plasma5.enable = true;

  boot = {
    kernelPackages = pkgs.linuxPackages_latest;
    supportedFilesystems = [ "btrfs" ];
    loader = {
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
      timeout = 3;
    };
    initrd = {
    kernelModules = ["uas" "usbcore" "usb_storage" "vfat" "nls_cp437" "nls_iso8859_1"];
        # Mount USB key before trying to decrypt root filesystem
        # postDeviceCommands = pkgs.lib.mkBefore ''
        #   mkdir -m 0755 -p /key
        #   sleep 2 # To make sure the usb key has been loaded
        #   mount -n -t vfat -o ro `findfs UUID=${PRIMARYUSBID}` /key || mount -n -t vfat -o ro `findfs UUID=${BACKUPUSBID}` /key
        # '';
        ### ----> Instead use systemd mount unit
        #systemd = {
        #  enable = true; # tpm2 unlock requires systemd initrd
        #  mounts = [{
        #    what = "UUID=720657da-2c89-4f47-aba9-b43618778a3d";
        #    where = "/key";
        #    type = "btrfs";
        #  }];
        #};
        luks.devices."crypted" = {
            bypassWorkqueues = true;
            device = lib.mkDefault "/dev/disk/by-partuuid/5e65cc4c-eb35-4d62-8fcd-387d6a87c067";
            # crypttabExtraOpts = [ "tpm2-device=auto" ]; # tpm2 unlock
            preLVM = true;

            # If using a USB or SD Card for decryption include the following.
            allowDiscards = true;
            # keyFileSize = 4096;
            # This is the disk id of your USB or SD Card.
            # Get this by running `ls -l /dev/disk/by-id`,
            # and copy the long string into the spot below.
            # keyFile = "/key/hdd.key";

            # Use this if you want to fallback to the encryption password when the drive can't be found. HIGHLY RECCOMENDED!!!! 
            #~~~~~ Actually it doesn't work as it is implied by systemd stage 1...
            # fallbackToPassword = true;

        };
    };
    resumeDevice = "/dev/nvme0n1"; # should be pointing to part. where swap resides
    kernelParams = [

      # hibernation
      "resume_offset=533760"
    ];
  };
  swapDevices = [ { device = "/.swapvol"; size=16*1024; } ];

    networking = {
    hostName = "jeroboam";
    domain = "mattmor.in";
    # wireless.enable = true; # Enables wireless support via wpa_supplicant.
    networkmanager.enable = true; # Easiest to use and most distros use this by default.
    enableIPv6 = false;
  };

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # Enable the X11 windowing system.
  services.xserver.enable = true;

  # Configure keymap in X11
  services.xserver.xkb.layout = "us";
  services.xserver.xkb.options = "eurosign:e,caps:escape";

  # Enable CUPS to print documents.
  # services.printing.enable = true;

  # Enable sound.
  hardware.pulseaudio.enable = true;
  # OR
  # services.pipewire = {
  #   enable = true;
  #   pulse.enable = true;
  # };

  # Enable touchpad support (enabled default in most desktopManager).
  # services.libinput.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.laozi = {
     isNormalUser = true;
     extraGroups = [ "wheel" ]; # Enable ‘sudo’ for the user.
     packages = with pkgs; [
       firefox
       tree
     ];
   };
   # List packages installed in system profile. To search, run:
  # $ nix search wget
   environment.systemPackages = with pkgs; [
     vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
     wget
     git

   ];

  hardware.enableAllFirmware = true;
  nixpkgs.config.allowUnfree = true;

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  # programs.gnupg.agent = {
  #   enable = true;
  #   enableSSHSupport = true;
  # };

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # Copy the NixOS configuration file and link it from the resulting system
  # (/run/current-system/configuration.nix). This is useful in case you
  # accidentally delete configuration.nix.
  # system.copySystemConfiguration = true;

  # This option defines the first version of NixOS you have installed on this particular machine,
  # and is used to maintain compatibility with application data (e.g. databases) created on older NixOS versions.
  #
  # Most users should NEVER change this value after the initial install, for any reason,
  # even if you've upgraded your system to a new NixOS release.
  #
  # This value does NOT affect the Nixpkgs version your packages and OS are pulled from,
  # so changing it will NOT upgrade your system - see https://nixos.org/manual/nixos/stable/#sec-upgrading for how
  # to actually do that.
  #
  # This value being lower than the current NixOS release does NOT mean your system is
  # out of date, out of support, or vulnerable.
  #
  # Do NOT change this value unless you have manually inspected all the changes it would make to your configuration,
  # and migrated your data accordingly.
  #
  # For more information, see `man configuration.nix` or https://nixos.org/manual/nixos/stable/options#opt-system.stateVersion .
  system.stateVersion = "24.05"; # Did you read the comment?

}