#!/usr/bin/env bash

# need to add your Token for duckdns below
token=${DUCKDNS_TOKEN:-}

if [ -z "$token" ]; then
    echo "DUCKDNS_TOKEN not set"
    exit 1
fi

domain="$1"
txtvalue="$2"
i=1

response=$(curl --retry 5 --silent "https://www.duckdns.org/update?domains=${domain}&token=${token}&txt=${txtvalue}")

while [[ "${response}" == *"502 Bad Gateway"* ]] && [ $i -le 5 ]; do
    echo "Retrying Bad Gateway response (attempt $i of 5)"
    sleep 5
    i=$((i+1))
    response=$(curl --retry 5 --silent "https://www.duckdns.org/update?domains=${domain}&token=${token}&txt=${txtvalue}")
done

if [ "$response" != "OK" ]; then
    echo "Failed to update TXT record for ${domain} at duckdns.org (is the TOKEN valid?)"
    echo "Response: $response"
    exit 1
fi