WALLPAPER=""
MODE=""

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

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

show_usage() {
  echo "Usage: theme [-m {light|dark|toggle}] [-w <file>]"
}

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

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

# Parse arguments
while getopts "m:w:" opt; do
  case "$opt" in
    m)
      case "$OPTARG" in
        light|dark)
          MODE="$OPTARG"
          ;;
        toggle)
          toggle_mode
          ;;
        *)
          show_usage
          exit 1
          ;;
      esac
      ;;
    w)
      set_wallpaper "$OPTARG"
      ;;
    *)
      show_usage
      exit 1
      ;;
  esac
done

finish