{ config, pkgs, ... }:

{
  imports = [ ./hardware-configuration.nix ];

  # Bootloader
#  boot.loader.grub.enable = true;
#  boot.loader.grub.device = "/dev/sda";
#  boot.loader.grub.useOSProber = true;
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

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

  networking.hostName = "nixos";
  networking.networkmanager.enable = true;

  time.timeZone = "Asia/Ho_Chi_Minh";

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

  i18n.inputMethod = {
    enable = true;
    type = "fcitx5";
    fcitx5.addons = with pkgs; [
      qt6Packages.fcitx5-unikey
      fcitx5-gtk
    ];
  };

  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";
  };

  services.xserver.enable = true;
  services.displayManager.sddm.enable = true;
  services.desktopManager.plasma6.enable = true;

  services.xserver.xkb = {
    layout = "us";
    variant = "";
  };

  services.printing.enable = true;

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

  users.users.duynguyen = {
    isNormalUser = true;
    description = "duynguyen";
    shell = pkgs.zsh;
    extraGroups = [ "networkmanager" "wheel" ];
    packages = with pkgs; [
      kdePackages.kate
    ];
  };

  programs.firefox.enable = true;
  programs.niri.enable = true;
  programs.zsh.enable = true;
  programs.fish.enable = true;

  # Power management (TLP conflicts with power-profiles-daemon which Plasma enables
  # by default, so explicitly disable it)
  services.power-profiles-daemon.enable = false;
  services.tlp.enable = true;
  services.upower.enable = true;

  # ddcutil: control external monitor brightness/contrast over DDC/CI
  boot.kernelModules = [ "i2c-dev" ];
  hardware.i2c.enable = true;

  security.polkit.enable = true;

  fonts.packages = with pkgs; [
    freefont_ttf
    noto-fonts-color-emoji
    font-awesome
    nerd-fonts.jetbrains-mono
  ];

  hardware.bluetooth.enable = true;
  services.blueman.enable = true;

  xdg.portal = {
    enable = true;
    extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
  };

  nixpkgs.config.allowUnfree = true;

  # Run prebuilt/foreign dynamically-linked Linux binaries (e.g. games)
  # that expect a standard FHS-style dynamic linker.
  programs.nix-ld.enable = true;
  programs.nix-ld.libraries = with pkgs; [
    stdenv.cc.cc.lib
    zlib
    openssl
    curl
    libGL
    libglvnd
    glib
    fontconfig
    freetype
    alsa-lib

    # SDL2 windowing backends (Wayland + XWayland fallback) — needed for
    # prebuilt games (e.g. Ren'Py) to open a window at all.
    wayland
    libxkbcommon
    libdecor
    xorg.libX11
    xorg.libXext
    xorg.libXcursor
    xorg.libXi
    xorg.libXfixes
    xorg.libXrandr
    xorg.libXScrnSaver
  ];

  environment.systemPackages = with pkgs; [
    claude-code
    git
    chromium
  ];

  services.openssh = {
    enable = true;
    settings.PasswordAuthentication = true;
  };

  system.stateVersion = "26.05";
}