#!/bin/csh
## config section
set vm              = $1
set vm_dataset      = "zroot/vms"
set vm_pid          = `/usr/bin/pgrep -f "bhyve: $vm"`
set backup_location = "/tank/backup/vms/"
set backup_date     = `date "+%Y-%m-%d"`

# snapshot vm
echo ""
foreach vm ($vm)

  ## prepare
  echo "################## PREPARE ####################"

  vm list | grep $vm ## DELETE ME

  if ( $vm_pid != 0 ) then
    (vm stop $vm > /dev/null) >& /dev/null

    ### check when vm is shutdown properly
    echo "Waiting for $vm to shutdown properly"

    while ({ /usr/bin/pgrep $vm_pid })
      echo "Waiting for pid $vm_pid"
      sleep 2
    end

    vm list | grep $vm ## DELETE ME

  endif

  echo ""
  echo "################## SNAPSHOT ###################"
  echo "Making a snapshot of $vm"
  sleep 1

  ## create snapshot
  zfs snapshot $vm_dataset/$vm@$backup_date

  ## start VM
  echo "Starting $vm"
  sleep 1
  (vm start $vm > /dev/null) >& /dev/null

end

# backup vm snapshot
echo ""
echo "################## BACKUP VM ##################"
foreach vm ($vm)

  echo "Send snapshot to local backup destination"
  sleep 1

  ## send snapshot to backup destination
  zfs send $vm_dataset/$vm@$backup_date | \
  gzip | \
  openssl enc -aes-256-cbc -a -pbkdf2 -iter 1000 -salt -k development \
  > $backup_location/$vm-$backup_date.gz.enc

  ## delete snapshot
  sleep 1
  zfs destroy $vm_dataset/$vm@$backup_date

end

# report done
echo ""
echo "############### ALL DONE THANKS ###############"
echo ""