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

let
  # Source wallpaperstuff in the flake
  wallpaperSource = "${flakeRoot}/assets/hyprland/wallpaperstuff";

  # Target in the user home
  wallpaperTarget = "$HOME/.config/wpaperd";

  # Config file inside the flake
  wallpaperConf = "${flakeRoot}/assets/hyprland/wallpaperstuff/wallpaper.conf";
in
{
  # Install the wpaperd package system-wide
  environment.systemPackages = with pkgs; [ wpaperd ];

  # Activation script: copy wallpapers & config to user home
  system.activationScripts.copyWpaperdConfig = {
    text = ''
      echo "=== Copying wpaperd config to $HOME/.config/wpaperd ==="
      mkdir -p "${wallpaperTarget}"
      cp -rT "${wallpaperSource}" "${wallpaperTarget}"
      echo "Done."
    '';
    deps = [ ];
  };

  # Enable linger so user services can run outside login
  systemd.enableUserServices = true;
  systemd.user.enableLinger = true;

  # User systemd service
  systemd.user.services.wpaperd = {
    description = "wpaperd wallpaper daemon";
    after = [ "default.target" ];

    serviceConfig = {
      Type = "simple";
      # Use bash -c to expand HOME properly
      ExecStart = "bash -c '${pkgs.wpaperd}/bin/wpaperd --config ${wallpaperTarget}/wallpaper.conf'";
      Restart = "on-failure";
      RestartSec = 1;
    };

    # Enable the service by default
    wantedBy = [ "default.target" ];
  };
}