# NixOS Configuration: /results/configuration.nix
# This file configures the core NixOS system.

{ config, pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      # This file will be generated by the NixOS installer.
      ./hardware-configuration.nix
    ];

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

  # ---
  # NETWORKING
  # ---
  networking.hostName = "nixos-desktop";
  networking.networkmanager.enable = true;

  # Set your time zone.
  time.timeZone = "Australia/Sydney";

  # ---
  # USER ACCOUNTS
  # ---
  users.users.sam = {
    isNormalUser = true;
    description = "Sam";
    extraGroups = [ "networkmanager" "wheel" ]; # "wheel" allows sudo
  };

  # ---
  # GRAPHICS & DESKTOP ENVIRONMENT
  # ---
  services.xserver = {
    enable = true;
    # Enable KDE Plasma 5 Desktop Environment
    desktopManager.plasma5.enable = true;
    # Enable SDDM as the display manager
    displayManager.sddm.enable = true;
    # Use the proprietary NVIDIA drivers
    videoDrivers = [ "nvidia" ];
  };

  # Enable OpenGL and Vulkan support
  hardware.opengl = {
    enable = true;
    driSupport = true;
    driSupport32Bit = true;
  };
  
  # Configure NVIDIA drivers for Hybrid Graphics (Intel + NVIDIA)
  hardware.nvidia = {
    modesetting.enable = true;
    # Use the stable proprietary driver package
    package = config.boot.kernelPackages.nvidiaPackages.stable;
    # Configure PRIME Render Offload
    prime = {
      sync.enable = true;
      # Set the PCI bus IDs for your GPUs (from lspci output)
      intelBusId = "PCI:0:2:0";
      nvidiaBusId = "PCI:1:0:0";
    };
  };

  # ---
  # SOFTWARE PACKAGES
  # ---
  environment.systemPackages = with pkgs; [
    # --- Tier 1: Critical Applications & Services ---
    firefox thunderbird kitty neovim nushell vscode telegram-desktop
    # --- Tier 2: Development & CLI Tools ---
    git rustc cargo nodejs python3 gcc gnumake btop eza bat fzf ripgrep zoxide
    # --- Tier 3: Desktop & GUI Applications ---
    libreoffice flameshot vlc spotify timeshift
  ];

  # ---
  # SERVICES
  # ---
  # Enable sound with PipeWire.
  sound.enable = true;
  hardware.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };
  
  # Enable CUPS for printing.
  services.printing.enable = true;

  # ---
  # DISK MOUNTS
  # ---
  fileSystems."/mnt/ubuntu_storage_3TB" = {
    device = "/dev/disk/by-uuid/037a542c-6aa9-4b1f-ab2f-4b6922ab371f";
    fsType = "ext4";
  };

  fileSystems."/mnt/windows-storage" = {
    device = "/dev/disk/by-uuid/063E316A3E315441";
    fsType = "ntfs-3g";
    options = [ "rw" "uid=1000" "gid=100" "umask=007" ];
  };
  
  # Allow installation of unfree packages (like NVIDIA drivers)
  nixpkgs.config.allowUnfree = true;

  # Set the system state version.
  system.stateVersion = "24.05";
}