# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # Bootloader.
  boot.loader.grub.enable = true;
  boot.loader.grub.device = "/dev/vda";
  boot.loader.grub.useOSProber = true;

  # Use latest kernel.
  boot.kernelPackages = pkgs.linuxPackages_latest;

  networking.hostName = "vm-0n25m"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

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

  # Enable networking
  networking.networkmanager.enable = true;
  networking.interfaces.enp1s0.ipv4.addresses = [{
    address = "192.168.122.2";
    prefixLength = 24;
  }];
  networking.defaultGateway = "192.168.122.1";
  networking.nameservers = [ "9.9.9.9" ];
  networking.firewall.allowedTCPPorts = [ 80 443 ];

  # enable NAT
#  networking.nat.enable = true;
#  networking.nat.externalInterface = "eth0";
#  networking.nat.internalInterfaces = [ "wg0" ];
#  networking.firewall.allowedUDPPorts = [ 51820 ];

#	  networking.wireguard.interfaces = {
#	    # "wg0" is the network interface name. You can name the interface arbitrarily.
#	    wg0 = {
#	      # Determines the IP address and subnet of the client's end of the tunnel interface.
#	      ips = [ "10.213.0.2/24" ];
#	      listenPort = 51820; # to match firewall allowedUDPPorts (without this wg uses random port numbers)
#	
#	      # Path to the private key file.
#	      #
#	      # Note: The private key can also be included inline via the privateKey option,
#	      # but this makes the private key world-readable; thus, using privateKeyFile is
#	      # recommended.
#	      privateKeyFile = "/home/user/wireguard-keys/private";
#	
#	      peers = [
#	        # For a client configuration, one peer entry for the server will suffice.
#	
#	        {
#	          # Public key of the server (not a file path).
#	          publicKey = "{server public key}";
#	
#	          # Forward all the traffic via VPN.
#	          allowedIPs = [ "0.0.0.0/0" ];
#	          # Or forward only particular subnets
#	          #allowedIPs = [ "10.100.0.1" "91.108.12.0/22" ];
#	
#	          # Set this to the server IP and port.
#	          endpoint = "147.189.168.9:51820"; # ToDo: route to endpoint not automatically configured https://wiki.archlinux.org/index.php/WireGuard#Loop_routing https://discourse.nixos.org/t/solved-minimal-firewall-setup-for-wireguard-client/7577
#	
#	          # Send keepalives every 25 seconds. Important to keep NAT tables alive.
#	          persistentKeepalive = 25;
#	        }
#	      ];
#	    };
#	  };  
  
  # Set your time zone.
  time.timeZone = "America/New_York";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  # Configure keymap in X11
  services.xserver.xkb = {
    layout = "us";
    variant = "";
  };

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.user = {
    isNormalUser = true;
    description = "user";
    extraGroups = [ "networkmanager" "wheel" "docker"];
    packages = with pkgs; [];
  };
  
  users.users.user.openssh.authorizedKeys.keys = [
      "sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAILlH0MBSUOzUfUdCNkPqrFSQsQnPrCD8wt2ZbUj7xn7lAAAABHNzaDo="  # green_ham
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG6GNWvC4o2MfwCWl7ClIMAL/UncQvJdxigrON0kLTkX"  # red_penguin
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM0a/oZbVK0v17T1S6yUw02tKxWkNGVMSJDCiL3q8Eb7" # blue_hen
  ];    
  # Enable automatic login for the user.
  services.getty.autologinUser = "user";

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  # 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
    wireguard-tools
  ];
  

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

##############################################################################################
#  Enable doas : SECURITY doas to replace sudo 

  security.doas.enable = true;
  security.doas.extraRules = [{
    groups = [ "wheel" ];
    persist = true;
    keepEnv = true;

  }];
  security.sudo.enable = false;
  security.sudo.execWheelOnly = true;


##############################################################################################
# Enable pam

  security.pam.u2f = {
   enable = true;
   settings = {
     interactive = true;
     cue = true;
   };
  };
  services.pcscd.enable = true;

  security.pam.services = {
  login.u2fAuth = false;
  sudo.u2fAuth = true;
  };


######################################################################################
# Enable docker 


  virtualisation.docker.enable = true;
#  users.users.user.extraGroups = [ "docker" ];
  virtualisation.docker.enableOnBoot = true;
  
##############################################################################################
# Enable caddy (local reverse proxy)
  services.caddy.enable = true;
  services.caddy.email = "example@example.com";

  services.caddy.virtualHosts."localhost".extraConfig = ''
        respond "OK"
        '' ;
    
  services.caddy.config = 
    "
        example.com {
          root /var/www/
        }
        
#        log {
#                level ERROR
#        }
    ";
# https://mdleom.com/blog/2020/03/14/caddy-nixos-part-3/#reverse-proxy

##############################################################################################  

  # 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;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "25.05"; # Did you read the comment?

}