#!/bin/bash

# Partly adapted from: https://github.com/ddries/d2c.sh/blob/master/d2c.sh
#
# requires: wget, ca-certificates, grep, jq
#rm -f /tmp/cookies.txt

COOKIEFILE="/tmp/cookies-cloudflareCtrl.txt"

source ~/.cloudflare
#ZONE_ID=
#API_KEY=

URL="https://api.cloudflare.com/client/v4"

# * * * NO MORE CHANGES DOWN HERE * * * 

COMMANDS="sed grep curl jq"
for COMMAND in $COMMANDS; do
  if ! command -v $COMMAND &> /dev/null
  then
    echo "$COMMAND could not be found!"
    exit 1
  fi
done

# parse parameters
DOMAIN=$(echo $1 | sed -r 's/^.*\.(.+\..+)$/\1/')
SUBDOMAIN=$(echo $1 | sed -r 's/^(.+)\..+\..+$/\1/')

if [ "$DOMAIN" == "$SUBDOMAIN" ]; then
  SUBDOMAIN=""
fi

echo "DOMAIN=${DOMAIN}"
echo "SUBDOMAIN=${SUBDOMAIN}"

UPDATE_IP=$2

#################################################

# get records from Cloudflare
RRAW=$(curl --silent --request GET \
        --url ${URL}/zones/${ZONE_ID}/dns_records \
        --header 'Content-Type: application/json' \
        --header "Authorization: Bearer ${API_KEY}" \
        | jq '.result[] | select(.type == "AAAA" and .name == "'${DOMAIN}'") | [.id, .name, .ttl, .content, .type]'
)

#echo $RRAW

id=$(jq -r '.[0]' <<< "${RRAW}")
content=$(jq -r '.[3]' <<< "${RRAW}")

#echo "old ip: ${content}"

#if [ "$UPDATE_IP" != "$content" ]; then
    # update DNS
    curl --silent --request PATCH \
    --url "${URL}/zones/${ZONE_ID}/dns_records/${id}" \
    --header 'Content-Type: application/json' \
    --header "Authorization: Bearer ${API_KEY}" \
    --data '{
        "content": "'${UPDATE_IP}'",
        "comment": "Updated by ffx at '$(date -Is)'"
    }'

    echo "OK: ${name}"
#else
#    echo "${name} did not change"
#fi

SUCCESS=$?
echo "Retval: $SUCCESS"

exit $SUCCESS