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

let
  username  = config.users.users.defaultUser or "henrov";
  configDir   = "/home/${username}/.config";
  assetPath = "${flakeRoot}/.config";
in
{
  environment.systemPackages = [ pkgs.rsync ];

  systemd.services.copyAssets = {
    description = "Copy assets to ${username}'s .config directory";
    wantedBy = [ "multi-user.target" ];

    # oneshot service runs once at boot
    serviceConfig.Type = "oneshot";

    # Always use /bin/sh -c for multi-line commands
    serviceConfig.ExecStart = ''
      /bin/sh -c '
        echo "Copying assets from ${assetPath} to ${configDir} ..."

        if [ ! -d "${assetPath}" ]; then
          echo "ERROR: ${assetPath} does not exist"
          exit 1
        fi

        mkdir -p "${configDir}"
        chown -R u+rwx ${username}:${username} "${configDir}"

        ${pkgs.rsync}/bin/rsync -a --no-owner --no-group "${assetPath}/" "${configDir}/"

        # Fix .config permissions
        mkdir -p "${configDir}"
        chown -R ${username}:${username} "${configDir}"
        chmod -R u+rwx "${configDir}"

        echo "Done copying config files."
      '
    '';
  };
}