#!/bin/bash

systemctl stop btrfs-scrub@-.timer
systemctl stop snapper-cleanup.timer
systemctl stop snapper-timeline.timer

mount -o noatime,compress=lzo,autodefrag /dev/mapper/cryptroot /home/niko/nosnap/rootfs/

cd /home/niko/nosnap

rm ro_snapshots 2> /dev/null

for snapshot in $(btrfs subvolume list -p /home/niko/nosnap/rootfs | awk '{ print $11 }'); do
  ro=$(btrfs property get -ts /home/niko/nosnap/rootfs/${snapshot} | awk -F  "=" '{print $2}');
  if [ "${ro}" == "true" ]; then
    echo ${snapshot}": "${ro}; echo ${snapshot} >> ro_snapshots;
    btrfs property set -ts /home/niko/nosnap/rootfs/${snapshot} ro false;
    echo "Set to: "$(btrfs property get -ts /home/niko/nosnap/rootfs/${snapshot} | awk -F  "=" '{print $2}');
  fi;
done

rm rootfs.hash 2> /dev/null

btrfs filesystem usage /home/niko/nosnap/rootfs/ > before_balance
btrfs balance start /home/niko/nosnap/rootfs/ --full-balance
btrfs filesystem usage /home/niko/nosnap/rootfs/ > after_balance

time duperemove -drh --dedupe-options=noblock --hashfile=/home/niko/nosnap/rootfs.hash /home/niko/nosnap/rootfs/ 2> duperemove.err
#time duperemove -drh --hashfile=/home/niko/nosnap/rootfs.hash /home/niko/nosnap/rootfs/ 2> duperemove.err

rm rootfs.hash 2> /dev/null

btrfs filesystem usage /home/niko/nosnap/rootfs/ > after_duperemove
btrfs balance start /home/niko/nosnap/rootfs/ --full-balance
btrfs filesystem usage /home/niko/nosnap/rootfs/ > after_duperemove_and_balance

for snapshot in $(cat ro_snapshots); do
  btrfs property set -ts /home/niko/nosnap/rootfs/${snapshot} ro true;
done

rm ro_snapshots 2> /dev/null

umount rootfs/

systemctl start btrfs-scrub@-.timer
systemctl start snapper-cleanup.timer
systemctl start snapper-timeline.timer