#!/usr/bin/env bash
# Need to add your API key below or set as env variable
apikey="$HOSTWAY_API_KEY"

# This script adds a token to dynu.com DNS for the ACME challenge
# usage dns_add_dynu "domain name" "token"
# return codes are;
# 0 - success
# 1 - error in input
# 2 - error within internal processing
# 3 - error in result ( domain not found in dynu.com etc)

fulldomain="${1}"
token="${2}"

API='https://api.hostway.com/dns'

# Check initial parameters
if [[ -z "$fulldomain" ]]; then
  echo "DNS script requires full domain name as first parameter"
  exit 1
fi
if [[ -z "$token" ]]; then
  echo "DNS script requires challenge token as second parameter"
  exit 1
fi

curl_params=( -H "accept: application/json" -H "Authorization: Basic $apikey" -H 'Content-Type: application/json charset=utf-8')

# Get domain id
# curl -X GET "https://api.hostway.com/dns/domain/"
resp=$(curl --silent "${curl_params[@]}" -X GET "$API/${fulldomain}")

# Match domain id
re="\"serial\":\s?([^}]*)"
if [[ "$resp" =~ $re ]]; then
  domain_id="${BASH_REMATCH[1]}"
fi

if [[ -z "$domain_id" ]]; then
  echo 'Domain name not found on your Hostway account'
  exit 3
fi

# Check for existing _acme-challenge TXT record
# curl -X GET "https://api.hostway.com/dns/domain/records?filterType=TXT&page=1&pageSize=100"
resp=$(curl --silent "${curl_params[@]}" -X GET "$API/${fulldomain}/records?filterType=TXT")
re="\"id\":\s?([^}]*)"
if [[ "$resp" =~ $re ]]; then
    record_id="${BASH_REMATCH[1]}"
fi

if [[ -z "$record_id" ]]; then
  # Add new TXT challenge record
  # curl -X POST https://api.hostway.com/dns/{domain}/records/{record_id} -d "{\"name\":\"_acme-challenge.{domain}\",\"type\":\"TXT\",\"ttl\":\"300\",\"data\":\"Test2\"}"
  # Response is empty when successful
  echo "Adding record for ${fulldomain}"  
  resp=$(curl --silent \
    "${curl_params[@]}" \
    -X POST "${API}/${fulldomain}/records" \
    --data "{\"name\":\"_acme-challenge.${fulldomain}\",\"type\":\"TXT\",\"ttl\":\"300\",\"data\":\"$token\"}")
else
  # Update existing record
  # curl -X PUT https://api.hostway.com/dns/{domain}/records/{record_id} -d "{\"name\":\"_acme-challenge.{domain}\", \"data\":\"Test2\"}"
  echo "Updating record for ${fulldomain}"
  resp=$(curl --silent \
    "${curl_params[@]}" \
    -X PUT "${API}/${fulldomain}/records/${record_id}" \
    --data "{\"name\":\"_acme-challenge.${fulldomain}\", \"data\":\"$token\"}")
fi

# Check if response data matches token
re="\"data\":\s?\"([^,]*)\""
if [[ "$resp" =~ $re ]]; then
    if [[ ${BASH_REMATCH[1]} == "$token" ]]; then
        token_match="$token ${BASH_REMATCH[1]}"
    fi
fi

# If adding record failed (exception:) then print error message
if [[ -z "$token_match" && "$resp" != "" ]]; then
	echo "Error: DNS challenge not added: unknown error - ${resp}"
        exit 3
    else
	echo "Record added successfully for ${fulldomain}"
fi