# shellcheck shell=bash

wallpaper=""
mode=""

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

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

usage() {
  echo "Usage: $0 [-m {light|dark|toggle}] [-w <file>]"
  exit 1
}

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="$OPTARG"
          ;;
        toggle)
          toggle_mode
          ;;
        *)
          usage
          ;;
      esac
      ;;
    w)
      set_wallpaper "$OPTARG"
      ;;
    *)
      usage
      ;;
  esac
done

finish