#!/usr/bin/env bash

THIS=$(basename ${BASH_SOURCE[0]})

usage() {
  cat <<EOF

Waybar control manager.

USAGE:
  
  $ $THIS [OPTION]

OPTIONS:

  -k | --kill:      Kill waybar 
  -r | --restart:   Restart waybar.
  -s | --start:     Start waybar.
  -t | --toggle:    Toggle visibility of waybar.
  -h | --help:      Show this help page.

EOF
}

kill_flag="0"
restart_flag="0"
start_flag="0"
toggle_flag="0"
waybar_pid=$(pgrep -x waybar)

while [[ $# -gt 0 ]]; do
  if [[ $1 == "-k" ]] || [[ $1 == "--kill" ]]; then
    kill_flag="1"
  elif [[ $1 == "-r" ]] || [[ $1 == "--restart" ]]; then
    restart_flag="1"
  elif [[ $1 == "-s" ]] || [[ $1 == "--start" ]]; then
    start_flag="1"
  elif [[ $1 == "-t" ]] || [[ $1 == "--toggle" ]]; then
    toggle_flag="1"
  elif [[ $1 == "-h" ]] || [[ $1 == "--help" ]]; then
    usage && exit 0
  fi
  shift
done

# Handle flags & state that need to kill the waybar process.
if [[ $kill_flag == "1" ]] ||
  [[ $restart_flag == "1" ]] ||
  ([[ $toggle_flag == "1" ]] && [[ -n $waybar_pid ]]); then
  pkill -x waybar
fi

# Handle flags & state that need to start the waybar process.
if [[ $restart_flag == "1" ]] ||
  ([[ $start_flag == "1" ]] && [[ -z $waybar_pid ]]) ||
  ([[ $toggle_flag == "1" ]] && [[ -z $waybar_pid ]]); then
  setsid uwsm app -- waybar >/dev/null 2>&1 &
  sleep 1 # Sleep to allow it to start if running in a pop up terminal.
fi