#!/usr/bin/env bash

set -euo pipefail

CONFIG="$HOME/.config/waybar/config-dock.jsonc"
STYLE="$HOME/.config/waybar/style-dock.css"
PIDFILE="/tmp/waybar-dock.pid"

is_running() {
  if [[ -f "$PIDFILE" ]]; then
    local pid
    pid="$(cat "$PIDFILE" 2>/dev/null || true)"
    if [[ -n "${pid:-}" ]] && kill -0 "$pid" 2>/dev/null; then
      return 0
    fi
  fi
  return 1
}

cleanup_pidfile() {
  if [[ -f "$PIDFILE" ]]; then
    local pid
    pid="$(cat "$PIDFILE" 2>/dev/null || true)"
    if [[ -z "${pid:-}" ]] || ! kill -0 "$pid" 2>/dev/null; then
      rm -f "$PIDFILE"
    fi
  fi
}

show() {
  cleanup_pidfile

  if is_running; then
    exit 0
  fi

  waybar -c "$CONFIG" -s "$STYLE" >/dev/null 2>&1 &
  local pid=$!

  echo "$pid" >"$PIDFILE"

  # kurz prüfen, ob der Prozess wirklich lebt
  sleep 0.1
  if ! kill -0 "$pid" 2>/dev/null; then
    rm -f "$PIDFILE"
    exit 1
  fi
}

hide() {
  cleanup_pidfile

  if ! is_running; then
    exit 0
  fi

  local pid
  pid="$(cat "$PIDFILE")"

  kill "$pid" 2>/dev/null || true

  # kurz warten, dann ggf. härter beenden
  for _ in {1..10}; do
    if ! kill -0 "$pid" 2>/dev/null; then
      rm -f "$PIDFILE"
      exit 0
    fi
    sleep 0.05
  done

  kill -9 "$pid" 2>/dev/null || true
  rm -f "$PIDFILE"
}

toggle() {
  cleanup_pidfile

  if is_running; then
    hide
  else
    show
  fi
}

status() {
  cleanup_pidfile
  if is_running; then
    echo "visible"
  else
    echo "hidden"
  fi
}

case "${1:-toggle}" in
show)
  show
  ;;
hide)
  hide
  ;;
toggle)
  toggle
  ;;
status)
  status
  ;;
*)
  echo "Usage: $0 {show|hide|toggle|status}"
  exit 1
  ;;
esac