#!/usr/bin/with-contenv /bin/sh

set -eu

VERSION_FILE=/var/lib/influxdb/meta/package-version

. /etc/secrets

influxql() {
  s6-setuidgid influxdb influx \
    -username "influxdb" \
    -password "$INFLUXDB_PASSWORD" \
    -unsafeSsl -ssl \
    -execute="$1"
}

if [ -f $VERSION_FILE ]; then
  [ ! -f /backup/influxdb/meta.00 ] || [ "$(cat $VERSION_FILE)" == "$INFLUXDB_VERSION" ] && exit
  s6-setuidgid influxdb influxd restore -metadir=/var/lib/influxdb/meta /backup/influxdb/
else
  influxd -config /etc/influxdb/config.toml &
  export pid=$!
  trap "kill $pid" SIGINT SIGTERM
  set +e
  RET=1
  while [[ $RET -ne 0 ]]; do
    echo "=> Waiting for confirmation of InfluxDB service startup ..."
    curl -k http://localhost:8086/ping 2> /dev/null
    RET=$?
    sleep 3
  done
  set -e

  influxql "CREATE USER influxdb WITH PASSWORD '${INFLUXDB_PASSWORD}' WITH ALL PRIVILEGES"
  influxql "CREATE DATABASE metrics"
  influxql "CREATE USER icinga WITH PASSWORD '${INFLUXDB_ICINGA_PASSWORD}'"
  influxql "GRANT ALL ON metrics TO icinga"
  influxql "CREATE USER grafana WITH PASSWORD '${INFLUXDB_GRAFANA_PASSWORD}'"
  influxql "GRANT READ ON metrics TO grafana"
  kill $pid
fi

echo "$INFLUXDB_VERSION" > $VERSION_FILE