[[ ! -d "${CONFIG}" ]] && mkdir -p "${CONFIG}"
[[ ! -L "${CONFIG}"/wallpaper ]] && ln -sf "${DEFAULT_WALLPAPER}" "${CONFIG}"/wallpaper
[[ ! -f "${CONFIG}"/mode ]] && echo "${DEFAULT_MODE}" > "${CONFIG}"/mode

WALLPAPER=""
MODE=""

set_wallpaper() {
  if [[ -f "$1" ]]; then
    WALLPAPER="$1"
  else
    echo "Invalid wallpaper path: $1"
    exit 1
  fi
}

set_mode() {
  if [[ "$1" = "light" ]] || [[ "$1" = "dark" ]]; then
    MODE="$1"
  else
    echo "Invalid mode: $1. Use 'light' or 'dark'."
    exit 1
  fi
}

toggle_mode() {
  if [[ "$(cat "${CONFIG}"/mode)" = "light" ]]; then
    MODE="dark"
  else
    MODE="light"
  fi
}

show_usage() {
  echo "Usage: theme {toggle|light|dark|mode <mode>|wallpaper <file> [mode]}"
}

finish() {
  [[ -n "${WALLPAPER}" ]] && ln -sf "${WALLPAPER}" "${CONFIG}"/wallpaper
  [[ -n "${MODE}" ]] && echo "${MODE}" > "${CONFIG}"/mode

  "${INIT}" > /dev/null
  "${RELOAD}" > /dev/null
}

if [[ $# -eq 0 ]]; then
  finish
else
  case "$1" in
    toggle)
      if [[ $# -eq 1 ]]; then
        toggle_mode
      else
        show_usage
        exit 1
      fi
      ;;
    light)
      if [[ $# -eq 1 ]]; then
        set_mode "light"
      else
        show_usage
        exit 1
      fi
      ;;
    dark)
      if [[ $# -eq 1 ]]; then
        set_mode "dark"
      else
        show_usage
        exit 1
      fi
      ;;
    mode)
      if [[ $# -eq 2 ]]; then
        set_mode "$2"
      else
        show_usage
        exit 1
      fi
      ;;
    wallpaper)
      if [[ $# -ge 2 ]] && [[ $# -le 3 ]]; then
        set_wallpaper "$2"
        [[ $# -eq 3 ]] && set_mode "$3"
      else
        show_usage
        exit 1
      fi
      ;;
    *)
      show_usage
      exit 1
      ;;
  esac

  finish
fi