#!/bin/bash

set -eux

ip=$(wget https://checkip.amazonaws.com/ -O - -q)

zone_id=$(aws route53 list-hosted-zones | jq -S '.HostedZones | .[] | select( .Name == "maxregan.me." ) | .Id' -r)

batch=$(cat <<EOM
{
  "Changes": [
    {
      "Action": "UPSERT",
      "ResourceRecordSet": {
        "Name": "home.maxregan.me",
        "Type": "A",
        "TTL": $((30 * 60)),
        "ResourceRecords": [
          {
            "Value": "${ip}"
          }
        ]
      }
    }
  ]
}
EOM
)

aws route53 change-resource-record-sets --hosted-zone-id "${zone_id}" --change-batch "$batch"

wait