# This is your system's configuration file.
# Use this to configure your system environment (it replaces /etc/nixos/configuration.nix)
{
  inputs,
  outputs,
  lib,
  config,
  pkgs,
  ...
}: {
  # You can import other NixOS modules here
  imports = [
    # If you want to use modules your own flake exports (from modules/nixos):
    # outputs.nixosModules.example

    # Or modules from other flakes (such as nixos-hardware):
    # inputs.hardware.nixosModules.common-cpu-amd
    # inputs.hardware.nixosModules.common-ssd

    # You can also split up your configuration and import pieces of it here:
    # ./users.nix

    # Import your generated (nixos-generate-config) hardware configuration
    ./hardware-configuration.nix
  ];

  nixpkgs = {
    # You can add overlays here
    overlays = [
      # Add overlays your own flake exports (from overlays and pkgs dir):
      outputs.overlays.additions
      outputs.overlays.modifications
      outputs.overlays.unstable-packages

      # You can also add overlays exported from other flakes:
      # neovim-nightly-overlay.overlays.default

      # Or define it inline, for example:
      # (final: prev: {
      #   hi = final.hello.overrideAttrs (oldAttrs: {
      #     patches = [ ./change-hello-to-hi.patch ];
      #   });
      # })
    ];
    # Configure your nixpkgs instance
    config = {
      # Disable if you don't want unfree packages
      allowUnfree = true;
    };
  };

  nix = let
    flakeInputs = lib.filterAttrs (_: lib.isType "flake") inputs;
  in {
    settings = {
      # Enable flakes and new 'nix' command
      experimental-features = "nix-command flakes";
      # Opinionated: disable global registry
      flake-registry = "";
      # Workaround for https://github.com/NixOS/nix/issues/9574
      nix-path = config.nix.nixPath;
    };
    # Opinionated: disable channels
    channel.enable = false;

    # Opinionated: make flake registry and nix path match flake inputs
    registry = lib.mapAttrs (_: flake: {inherit flake;}) flakeInputs;
    nixPath = lib.mapAttrsToList (n: _: "${n}=flake:${n}") flakeInputs;
  };

  # FIXME: Add the rest of your current configuration

  # Bootloader.
  # boot.loader.systemd-boot.enable = true;
  # boot.loader.efi.canTouchEfiVariables = true;

  # # Enable networking
  # networking.hostName = "overkill";
  # networking.networkmanager.enable = true;

  # 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";
  # };

  # Enable the X11 windowing system.
  # Use nvidia drivers
  # services.xserver = {
  #   enable = true;
  #   videoDrivers = ["nvidia"];
  # };
  # Enable the KDE Plasma Desktop Environment.
  # services.displayManager.sddm.enable = true;
  # services.xserver.desktopManager.plasma5.enable = true;
  # programs.firefox.enable = true;
  # Configure keymap in X11
  # services.xserver = {
  #   layout = "us";
  #   xkbVariant = "";
  # };

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

  # Enable sound with pipewire.
  # hardware.pulseaudio.enable = false;
  # security.rtkit.enable = true;
  # services.pipewire = {
  #   enable = true;
  #   alsa.enable = true;
  #   alsa.support32Bit = true;
  #   pulse.enable = true;
  #   # If you want to use JACK applications, uncomment this
  #   jack.enable = true;

  #   # use the example session manager (no others are packaged yet so this is enabled by default,
  #   # no need to redefine it in your config for now)
  #   #media-session.enable = true;
  # };

  # hardware.opengl = {
  #   enable = true;
  #   driSupport = true;
  # };
  # system-wide user settings (groups, etc).
  users.users = {
    yuvashankar = {
      description = "Vinay Yuvashankar";
      # TODO: You can set an initial password for your user.
      # If you do, you can skip setting a root password by passing '--no-root-passwd' to nixos-install.
      # Be sure to change it (using passwd) after rebooting!
      initialPassword = "correcthorsebatterystaple";
      isNormalUser = true;
      openssh.authorizedKeys.keys = [
        # TODO: Add your SSH public key(s) here, if you plan on using SSH to connect
      ];
      # Be sure to add any other groups you need (such as networkmanager, audio, docker, etc)
      extraGroups = ["networkmanager" "wheel" "users"];
    };
  };

  # VY: Disabling SSH server
  # This setups a SSH server. Very important if you're setting up a headless system.
  # Feel free to remove if you don't need it.
  # services.openssh = {
  #   enable = true;
  #   settings = {
  #     # Opinionated: forbid root login through SSH.
  #     PermitRootLogin = "no";
  #     # Opinionated: use keys only.
  #     # Remove if you want to SSH using passwords
  #     PasswordAuthentication = false;
  #   };
  # };

  # https://nixos.wiki/wiki/FAQ/When_do_I_update_stateVersion
  system.stateVersion = "24.05";
}
