#!/bin/bash

set -e
set -x

PATH=$1
SERVER=$(jq -r .server_hostname < /etc/backup/config.json)
UUID=$(jq -r .client_uuid < /etc/backup/config.json)

echo "BACKUP - PATH: $PATH, SERVER: $SERVER, UUID: $UUID"

if zfs list -H -o mountpoint | grep -q "$PATH"
then
  SOURCE_DATASET=$(zfs list -H -o mountpoint,name | grep -P "^$PATH\t" | cut -d $'\t' -f 2)
  SOURCE_DATASET_STRIPPED=$(echo $SOURCE_DATASET | cut -f / -d 2-)
  TARGET_DATASET="tank/$UUID/$DATASET_NAME"
  SSH="ssh backup-receiver@$SERVER"
  DATE=$(date +"%Y-%m-%d_%H:%M:%S")
  BOOKMARK="ATUO_BACKUP_$DATE"
  echo "BACKUP ZFS DATASET - SOURCE_DATASET: $SOURCE_DATASET, TARGET_DATASET: $TARGET_DATASET"

  if ! $SSH zfs list -t filesystem -H -o name | grep -q "^$TARGET_DATASET$"
  then
    echo "CREATING TARGET DATASET..."
    zfs create -p -o mountpoint=none "$TARGET_DATASET"
  fi

  zfs snap $SOURCE_DATASET@$BOOKMARK
  zfs bookmark $SOURCE_DATASET@$BOOKMARK $SOURCE_DATASET\#$BOOKMARK
  zfs destroy $SOURCE_DATASET@$BOOKMARK
  


  zfs send -i tank/nextcloud@test1 tank/nextcloud@test2 | ssh backup-receiver@$SERVER sudo zfs recv tank/nextcloud
elif test -d "$PATH"
then
  TYPE=directory
elif test -f "$PATH"
then
  TYPE=file
else
  echo "UNKNOWN TYPE: $PATH"
  exit 1
fi