#!/bin/bash

set -o xtrace

if [[ $# < 2 ]]; then
  echo "First argument is compose prefix. File with list of 'volumes binddir' needed as second argument"
  exit 1
fi

if [[ ! -f "${2}" ]]; then
	echo "File with list of 'volumes binddir' missing (${2})."
  exit 1
fi

if [[ ! -d "../@${1}" ]]; then
  echo "Compose directory not valid (${1})"
  exit 1
fi

sudo docker rm -f helper
if [[ -f log.txt ]]; then
  mv log.txt "log-$(date +%N).txt"
else
  touch log.txt
fi  

VOLUMES="$(sudo docker volume ls -q |grep ${1}_)a"
touch log.txt
sleep 2
while read -r F1 F2; do
  VOLUME="${1}_${F1}"
  if grep -wq "${VOLUME}" - <<< $VOLUMES; then
      COMMAND="rm -rvf /volume/{*,.*}  && cp -a ../bindmnt/. /volume"
      BINDMNT=$(realpath "../cndata/${F2}")
      sudo docker run --name helper \
	-v "${VOLUME}:/volume" \
	-v "${BINDMNT}:/bindmnt" \
	busybox \
	sh -c "${COMMAND}"
      sudo docker logs helper >> log.txt
      sudo docker rm -f helper
      sleep 2
  else
      echo "$VOLUME is not available for restoration"
      exit 1
  fi    
done < "${2}"

set +o xtrace