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

{
  imports =
    [ 
      ./system-utils.nix           # CLI Tools
      ./user-apps.nix              # GUI Apps
    ];

  # ==========================================
  # 1. CORE SYSTEM SETTINGS
  # ==========================================
  # Bootloader (Standard UEFI)
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  # Networking
  networking.networkmanager.enable = true;
  
  # Time & Locale
  time.timeZone = "Europe/London";
  i18n.defaultLocale = "en_US.UTF-8";

  # ==========================================
  # 2. USER ACCOUNT
  # ==========================================
  users.users.nimmo = {
    isNormalUser = true;
    description = "Nimmo";
    extraGroups = [ "networkmanager" "wheel" "docker" ]; 
  };

  # ==========================================
  # 3. COMMON SERVICES
  # ==========================================
  # Firmware & Updates
  services.fwupd.enable = true;

  # Power (Standard Profile)
  services.power-profiles-daemon.enable = true;

  # Filesystem Maintenance
  services.fstrim.enable = true;
  zramSwap.enable = true;
  services.btrfs.autoScrub = {
    enable = true;
    interval = "weekly";
    fileSystems = [ "/" ];
  };

  # Garbage Collection
  nix.gc = {
    automatic = true;
    dates = "weekly";
    options = "--delete-older-than 7d";
  };
  
  # Bluetooth
  hardware.bluetooth.enable = true;
  hardware.bluetooth.powerOnBoot = true;

  # Audio (Pipewire)
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
  };

  # Docker
  virtualisation.docker.enable = true;

  # Steam
  programs.steam = {
    enable = true;
    remotePlay.openFirewall = true;
    dedicatedServer.openFirewall = true;
  };

  # ==========================================
  # 4. DESKTOP ENVIRONMENT (Plasma 6)
  # ==========================================
  services.xserver.enable = true;
  services.displayManager.sddm.enable = true;
  services.displayManager.sddm.wayland.enable = true;
  services.displayManager.sddm.autoNumlock = true;
  services.desktopManager.plasma6.enable = true;
  services.xserver.xkb.layout = "gb";

  # ==========================================
  # 5. NIX CORE SETTINGS
  # ==========================================
  nixpkgs.config.allowUnfree = true;
  nix.settings.experimental-features = [ "nix-command" "flakes" ];
  system.stateVersion = "24.11"; 

  # ==========================================
  # 6. POLISHING
  # ==========================================
  fonts.packages = with pkgs; [
    noto-fonts
    noto-fonts-cjk-sans
    noto-fonts-emoji
    nerd-fonts.jetbrains-mono 
  ];

  programs.nix-ld.enable = true;
  programs.nix-ld.libraries = with pkgs; [
    stdenv.cc.cc.lib
    zlib
    fuse3
    icu
    nss
    openssl
    curl
    expat
  ];

  environment.variables.EDITOR = "nano";
}