configuration.nix

{ config, pkgs, ... }: { 
  networking = {
    networkmanager.enable = true;
    dhcpcd = {
      wait = "background";
      extraConfig = "noarp";
    };
  };
  
  boot.kernel.sysctl = {
    "net.ipv4.ip_default_ttl" = 65;
    "net.ipv6.conf.all.hop_limit" = 65;
  };

  time.timeZone = "Europe/Moscow";

  i18n.defaultLocale = "en_US.UTF-8";

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

  boot.supportedFilesystems = {
    btrfs = true;
    exfat = true;
    ext = true;
    ntfs = true;
    vfat = true;
    xfs = true;
  };

  services.xserver = {
    enable = true;
    displayManager = {
      session = [{
        manage = "desktop";
        name = "xsession";
        start = "exec ~/.xsession";
      }];

      lightdm = {
        enable = true;
        background = ./wallpapers/nixos-nord-dark.png;
      };
    };

    xkb = {
      layout = "us,ru";
      variant = ",";
    };
  };

  services.displayManager = {
    defaultSession = "xsession";   
  };

  services.printing.enable = true;

  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    jack.enable = true;
  };

  services.libinput.enable = true;

  environment.interactiveShellInit = ''
    alias cl=clear
    export PATH="$PATH:$HOME/.pub-cache/bin"
  '';

  nix = {
    package = pkgs.nixVersions.latest;

    settings.experimental-features = ["nix-command" "flakes"];
  };

  users.users.chell = {
    isNormalUser = true;
    description = "chell";
    extraGroups = [ "networkmanager" "wheel" "docker" "plugdev" "dialout" "sys" "lp" ];
    hashedPassword = "$y$j9T$dvuZmpawy1e63KSJpnLSE1$IVAAzcmcisaRsfNRMDikox36MOyH.e/DVOcJZG0cvAB";
    
    shell = pkgs.nushell;

    packages = with pkgs; [
    ];
  };

  nixpkgs.config = {
    allowUnfree = true;
    permittedInsecurePackages = [
      "electron-24.8.6"
      "electron-19.1.9"
    ];
  };

  environment.systemPackages = with pkgs; [
    acpi
    android-tools
    cabal-install
    dart
    dive
    dmidecode
    docker-compose
    file
    firebase-tools
    flutter
    gcc
    ghc
    glances
    go
    haskell-language-server
    home-manager
    inxi
    jdk
    lshw
    fastfetch
    openvpn
    parted
    pciutils
    podman-tui
    rustup
    screentest
    stack
    upower
    usbutils
    unzip
    wget
  ];

  virtualisation.containers.enable = true;

  virtualisation.docker.enable = true;

  virtualisation.podman = {
    enable = true;

    defaultNetwork.settings.dns_enabled = true;
  };

  programs = {
    dconf.enable = true;

    neovim = { 
      enable = true;
      defaultEditor = true;

      viAlias = true;
      vimAlias = true;
    };

    direnv = {
      enable = true;
    };
  };

  services.postgresql = {
    enable = true;
    authentication = pkgs.lib.mkOverride 10 ''
      #type database DBuser auth-method
      local all      all    trust
    '';
  };

  services.openssh = {
    enable = true;
  };

  networking.firewall = {
    enable = true;
    allowedTCPPorts = [ 80 443 ];
    allowedUDPPortRanges = [
      { from = 28800; to = 28802; }
    ];
  };

  # 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 = "23.11";
  # Did you read the comment?

}