#!/usr/bin/env bash

set -euo pipefail

# Ensure in a interactive terminal
[ ! -t 0 ] && exit 1

# Construct query
QUERY_CODE=$(printf "\033[c")

# Set terminal to raw mode with timeout as 0.5s
stty_orig=$(stty -g)
trap 'stty "$stty_orig"' EXIT INT TERM HUP
stty -echo -icanon min 1 time 0

printf "%s" "$QUERY_CODE" >/dev/tty

response=""
while true; do
	IFS= read -r -N 1 -t 0.3 char || {
		[ -z "$char" ] && break
	}

	response+="$char"

	if [[ "$char" = "c" ]]; then
		break
	fi

	if [ ${#response} -gt 1024 ]; then
		break
	fi
done

if [[ "$response" =~ $'\x1b'\[\?([0-9;]*)c ]]; then
    params="${BASH_REMATCH[1]}"

    IFS=';' read -ra codes <<< "$params"

    for code in "${codes[@]}"; do
        if [[ "$code" == "4" ]]; then
            exit 0
        fi
    done
fi

exit 1