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

## 'configuration.nix' is primarily where you'll install packages and manage system configurations.

let
  secrets = import ./secrets.nix;

  # Needed for installing unstable channel packages.
  unstableTarball =
    fetchTarball
      https://github.com/NixOS/nixpkgs/archive/nixos-unstable.tar.gz;
in
{
  imports =
  [ # Include the results of the hardware scan.
    ./hardware-configuration.nix
  ];

  nixpkgs.config =
  {
    # Enable unfree packages.
    allowUnfree = true;

    # Needed for installing unstable channel packages.
    packageOverrides = pkgs:
    {
      unstable = import unstableTarball
      {
        config = config.nixpkgs.config;
      };
    };
  };


  nix = {
    # Specifying the Nix daemon is allowed by anyone with sudo privileges.
    settings.allowed-users = [ "@wheel" ];

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

  # Set your time zone.
  time.timeZone = "America/Edmonton";


  boot =
  {
    supportedFilesystems = ["vfat" "btrfs"];

    loader =
    {
      timeout = 5;

      efi =
      {
        canTouchEfiVariables = true;
        efiSysMountPoint = "/boot";
      };

      # Use the GRUB boot loader.
      # Uses GRUB 2 by default.
      grub = {
        enable = true;
        # "nodev" for efi only
        device = "nodev";
        efiSupport = true;

        # Set grub resolution to 1920x1080px.
        gfxmodeEfi = "1920x1080";
      };
    };
  };


  users =
  {
    mutableUsers = false;

    users =
    {
      root.hashedPassword = "!";

      ${secrets.systemUsername} =
      {
        hashedPassword = "${secrets.hashedPassword}";
        isNormalUser = true;
        # description = "Your User";
        extraGroups = ["wheel" "storage" "networkmanager"];

        packages = with pkgs;
        [
          ## Browsers
          firefox
          librewolf

          ## Coding/programming.
          git

          (vscode-with-extensions.override
            {
              vscode = vscodium;
              vscodeExtensions = with vscode-extensions;
              [
                ## Extension examples:
                # dracula-theme.theme-dracula
                # ms-python.python
                # rust-lang.rust-analyzer
              ];
            }
          )
        ];
      };
    };
  };


  environment =
  {
    systemPackages = with pkgs;
    [
      # nano
    ];

    ## Hyprland required environment variables.
    sessionVariables =
    {
      ## If your cursor becomes invisible
      WLR_NO_HARDWARE_CURSORS = "1";

      ## Hint electron apps to use wayland.
      ## Required to run VSCodium with wayland.
      NIXOS_OZONE_WL = "1";
    };
  };

  security = {
    ## require a password for all sudo usage
    sudo.wheelNeedsPassword = true;
  };

  networking = {
    ## Set your hostname.
    hostName = "${secrets.hostName}";

    ## Enable networking
    networkmanager.enable = true;
  };

  programs =
  {
    ## Fixes GTK theming in Wayland applications.
    dconf.enable = true;

    # network diagnostics tool.
    # mtr.enable = true;
    # gnupg.agent =
    # {
    #   enable = true;
    # };
  };


  services =
  {
    ## Disable CUPS print dameon.
    printing.enable = false;

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

      ## Enable the KDE Plasma Desktop Environment.
      desktopManager.plasma5.enable = true;

      ## Uncomment to enable touchpad support.
      # libinput.enable = true;

      ## Configure keymap in X11.
      layout = "us";
      xkbVariant = "";

      displayManager =
      {
        ## Uncomment to set default session as plasma wayland during login.
        # defaultSession = "plasmawayland";

        sddm =
        {
          ## Enable SDDM.
          enable = true;

          ## Enable numlock at login.
          autoNumlock = true;
        };
      };
    };
  };

  system.stateVersion = "23.11";
}