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

let
  username     = config.users.users.defaultUser or "henrov";
  homeDir      = "/home/${username}";
  wallpaperSrc = "${flakeRoot}/assets/traveldroid/Wallpapers";
  wallpaperDst = "${homeDir}/Wallpapers";
in
{
  environment.systemPackages = [ pkgs.bash pkgs.coreutils ];

  systemd.user.services.copyWallpapers = {
    description = "Copy wallpapers from repo to ~/Wallpapers";
    wants       = [ "graphical-session.target" ];
    after       = [ "graphical-session.target" ];

    serviceConfig.Type = "oneshot";

    serviceConfig.ExecStart = ''
        echo "Copying wallpapers from ${wallpaperSrc} to ${wallpaperDst} ..."

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

        mkdir -p "${wallpaperDst}"
        chown -R ${username}:${username} "${wallpaperDst}"

        # Copy everything from source to destination
        cp -r "${wallpaperSrc}/." "${wallpaperDst}/"

        # Fix permissions just in case
        chown -R ${username}:${username} "${wallpaperDst}"
        chmod -R u+rwx "${wallpaperDst}"

        echo "Done copying wallpapers."
    '';

    serviceConfig.Restart = "no";
  };
}