#!/bin/sh
interactiveopt() {
	# Usage: interactiveopt "options" "prompt" "maxopts (if unset than equal to inf)" "col"
	# Purpose: give the user a numbered list of options. User can specify multiple choices. User can specify either the number or the name of the option.
	# Output: saved in variable "opt"
	unset opt # This won't be set if using recursion, do it in a while loop instead
	while [ -z $opt ] 2>/dev/null; do
		# Column option
		[ -n "$4" ] && [ "$4" = "col" ] \
			&& echo "$1" | nl -s': ' | column \
			|| echo "$1" | nl -s': '
		# Parse user input
		read -p "$2" choices \
			&& choices="$(echo $choices | cut -d' ' -f1-$3)"
		for choice in $choices; do
			case "$choice" in
				[0-9]*)	opt="$(echo "$1" | head -"$(echo $choice | tr -cd '[:digit:]')" | tail -1) $opt"	;;
				*) 	opt="$(echo "$1" | grep "^$choice$" 2>/dev/null) $opt"					;;
			esac || ( echo "Invalid option \"$choice\"" && undet opt && break ) # Why wont this unset opt or break???????
		done
	done
}

listfiles() {
	pids=$(xdotool search --class "Vim")
	for pid in $pids; do
		names="$(xdotool getwindowname $pid | grep '\.tex')\n$names"
		#$openfiles="$(echo "$name" | cut -d' ' -f1)\n$openfiles"
		#$openfilepaths="$(echo "$name" | awk -F'[()]' '{ print $2 }')\n$openfiles"
	done
	#file="$(echo $openfiles | grep "^$1")"
	[ -z "$file" ] \
		&& interactiveopt "$(echo $openfiles | sort -bu | tail +2)" "Which file to autocompile? " 1 \
		&& file="$opt"
}

[ -e "$1" ] && file="$1" || listfiles

echo "$file" | entr pdflatex "$file" || echo "entr or LaTeX is not installed!"