#!/bin/bash -e

[ $# -lt 2 ] && { echo "Usage: $0 {backup|restore} BACKUP_FILENAME"; exit 1; }

DOCKER_COMPOSE=/usr/bin/docker-compose

backup_file=$2

project_subscriber_volume_name=client_data
project_tor_volume_name=tor_config
tor_service=tor

$DOCKER_COMPOSE --log-level WARNING up --no-start

project_name=$(docker ps -a --no-trunc | grep $($DOCKER_COMPOSE ps -q ${tor_service}) | awk '{ print $2; }' | awk -F "_" '{ print $1; }')

project_volumes=$(docker volume ls -f name=$project_name | awk '{if (NR > 1) print $2"\n";}')

subscriber_volume=$(echo "$project_volumes" | grep ${project_subscriber_volume_name} | xargs)
tor_volume=$(echo "$project_volumes" | grep ${project_tor_volume_name} | xargs)

function backup {

  docker run --rm \
    -v $subscriber_volume:/data/subscriber \
    -v $tor_volume:/data/tor \
    -v $(pwd):/backup \
    ubuntu \
    tar -C / -czvf /backup/$backup_file data

  docker run --rm \
    -v $(pwd):/backup \
    ubuntu \
    chown $UID:$UID /backup/$backup_file
}

function restore {

  $DOCKER_COMPOSE stop $tor_service

  cp $backup_file backup.tar.gz

  docker run --rm \
    -v $subscriber_volume:/data/subscriber \
    -v $tor_volume:/data/tor \
    -v $(pwd)/$backup_file:/backup/backup.tar.gz \
    ubuntu \
    tar -C / -xzvf /backup/backup.tar.gz

  $DOCKER_COMPOSE start $tor_service

  rm backup.tar.gz
}

$1