#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

wss=`i3-msg -t get_workspaces | tr , '\n' | grep num | cut -d : -f 2 | sort -n`
nextwss=()
for ws in $wss; do
	((ws=$ws+1))
	nextwss+=( "$ws" )
done

for nextws in ${nextwss[@]}; do
	exists=false
	for ws in $wss; do
		if [[ $ws -eq $nextws ]]; then
			exists=true
			break
		fi
	done

	if [ $exists = false ]; then
		newws=$nextws
		break
	fi
done

i3-msg workspace $newws