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

let
  hostname = config.networking.hostName or "traveldroid";
in
{
  #################################
  # Bootloader (UEFI + GRUB)
  #################################
  boot.loader = {
    efi = {
      canTouchEfiVariables = true;
      efiSysMountPoint = "/boot";
    };

    grub = {
      enable = true;
      efiSupport = true;
      device = "nodev";      # safe for UEFI
      useOSProber = true;
    };

    timeout = 5;
  };

  #################################
  # Kernel / initrd
  #################################
  boot.kernelPackages = pkgs.linuxPackages_latest;

  boot.kernelParams = [
    "quiet"
    "splash"
    "udev.log_level=3"
    "rd.systemd.show_status=false"
  ];

  boot.consoleLogLevel = 0;

  boot.initrd.systemd.enable = true;
  boot.initrd.availableKernelModules = [
    "xhci_pci"
    "nvme"
    "usb_storage"
    "sd_mod"
    "rtsx_usb_sdmmc"
  ];
  boot.initrd.kernelModules = [ ];
  boot.kernelModules = [ "kvm-intel" ];
  boot.extraModulePackages = [ ];

  #################################
  # Plymouth boot splash
  #################################
  boot.plymouth = {
    enable = true;
    theme = "rings";
    themePackages = [
      (pkgs.adi1090x-plymouth-themes.override {
        selected_themes = [ "rings" ];
      })
    ];
  };

  #################################
  # CPU microcode
  #################################
  hardware.cpu.intel.updateMicrocode =
    lib.mkDefault config.hardware.enableRedistributableFirmware;

  #################################
  # Nix host platform
  #################################
  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";

  #################################
  # System state version
  #################################
  system.stateVersion = "26.05";

  #################################
  # Automatic GRUB update after rebuild
  #################################
  system.postBootCommands = ''
    echo "Regenerating GRUB menu..."
    ${pkgs.nixosModules.grub}/bin/grub-mkconfig -o /boot/grub/grub.cfg || true
  '';

  systemd.services.grub-update = {
    description = "Update GRUB menu on boot";
    after = [ "local-fs.target" ];
    wantedBy = [ "multi-user.target" ];
    serviceConfig = {
      Type = "oneshot";
      ExecStart = "${pkgs.nixosModules.grub}/bin/grub-mkconfig -o /boot/grub/grub.cfg";
      RemainAfterExit = true;
    };
  };
}