#!/bin/sh


SCRIPT="$0"
SCRIPT_DIR=$(cd "${SCRIPT%/*}" && pwd )
SCRIPT_NAME=${SCRIPT##*/}
APPEND_RECORDS_DIR="{{ ovh_domain_zone_append_records_directory }}"
REPLACE_RECORDS_DIR="{{ ovh_domain_zone_replace_records_directory }}"
mkdir -p ${APPEND_RECORDS_DIR}
mkdir -p ${REPLACE_RECORDS_DIR}

cut_nth_word()
{
  echo "$1" | cut -d ' ' -f "$2"
}

get_record_subdomain()
{
  record="$1"
  subdomain="$(cut_nth_word "$record" 1)"
  if test "$(echo "$subdomain" | grep -q [A-Z])"
  then
    subdomain="$(cut_nth_word "$record" 2)"
  fi
  if test "$subdomain" == "@"
  then
    subdomain=""
  fi
  echo "$subdomain"
}

get_record_type()
{
  record="$1"
  record_type="$(cut_nth_word "$record" 2)"
  if test "$(echo "$record_type" | grep -q [0-9])"
  then
    record_type="$(cut_nth_word "$record" 1)"
  fi
  echo "$record_type"
}

get_record_target()
{
  record="$1"
  target_and_ttl="$(cut_nth_word "$record" "3-")"
  target="$(cut_nth_word "$(echo "$target_and_ttl" | rev)" "2-" | rev)"
  echo "$target"
}

get_record_ttl()
{
  record="$1"
  ttl="$(cut_nth_word "$(echo "$record" | rev)" 1 | rev)"
  echo "$ttl"
}

find_existing_record_ids()
{
  subdomain="$1"
  record_type="$2"
  target="$3"
  query=".subDomain == \"${subdomain}\" and .fieldType == \"${record_type}\""
  if [ -n "$target" ]
  then
    query="${query} and .target == ${target}"
  fi
  ovhcloud domain-zone record list joeac.net -o json \
    | jq "map(select($query))" \
    | jq "map(.id)" \
    | grep -Eo [0-9]\+
}

append_record()
{
  subdomain="$1"
  record_type="$2"
  target="$3"
  ttl="$4"
  echo "Appending record to joeac.net zone: ${record_type} ${subdomain:-@} ${target} ${ttl}"
  ovhcloud domain-zone record create joeac.net \
    --field-type "$record_type" \
    --sub-domain "$subdomain" \
    --target "$target" \
    --ttl "$ttl"
}

replace_records()
{
  subdomain="$1"
  target="$2"
  ttl="$3"
  first_existing_record_id="$4"
  echo "Replacing record ${first_existing_record_id} in joeac.net zone: ${record_type} ${subdomain:-@} ${target} ${ttl}"
  ovhcloud domain-zone record update joeac.net "$first_existing_record_id" \
    --sub-domain "${subdomain}" \
    --target "${target}" \
    --ttl "${ttl}"
  shift 4
  excess_record_ids="$@"
  if [ -n "$excess_record_ids" ]
  then
    for id in "$excess_record_ids"
    do
      echo "Removing record ${id} in joeac.net zone: ${record_type} ${subdomain:-@}"
      ovhcloud domain-zone record delete joeac.net "$id"
    done
  fi
}

if test $(ls ${APPEND_RECORDS_DIR} | wc -l) -eq 0
then
  echo "Nothing to append: no zone files in ${APPEND_RECORDS_DIR}"
else
  for zone_file in ${APPEND_RECORDS_DIR}/*
  do
    while read record
    do
      subdomain="$(get_record_subdomain "$record")"
      record_type="$(get_record_type "$record")"
      target="$(get_record_target "$record")"
      ttl="$(get_record_ttl "$record")"
      if test -z "$(find_existing_record_ids "$subdomain" "$record_type" "$target")"
      then
        append_record "$subdomain" "$record_type" "$target" "$ttl"
      fi
    done < "${zone_file}"
  done
fi

if test $(ls ${REPLACE_RECORDS_DIR} | wc -l) -eq 0
then
  echo "Nothing to replace: no zone files in ${REPLACE_RECORDS_DIR}"
  exit 0
else
  for zone_file in ${REPLACE_RECORDS_DIR}/*
  do
    while read record
    do
      subdomain="$(get_record_subdomain "$record")"
      record_type="$(get_record_type "$record")"
      target="$(get_record_target "$record")"
      ttl="$(get_record_ttl "$record")"

      existing_record_ids="$(find_existing_record_ids "$subdomain" "$record_type")"
      if test -n "$existing_record_ids"
      then
        replace_records "$subdomain" "$target" "$ttl" "$existing_record_ids"
      else
        append_record "$subdomain" "$record_type" "$target" "$ttl" "$existing_record_ids"
      fi
    done < "${zone_file}"
  done
fi

ovhcloud domain-zone refresh joeac.net