#!/bin/bash
#
# bashclub zfs replication script config tool
# Author: (C) 2023 Thorsten Spille <thorsten@spille-edv.de>

PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin"

prog="$(basename $0)"

#### default config file, can be changed with parameter -c
action=list
conf=/etc/bashclub/zsync.conf
recursive=0
key=
path=
value=


usage() {
	cat >&2 <<-EOF
	usage: $prog [-h] [-a ACTION] [-c CONFIG] [-p PATH] [-s KEY[=VALUE]] [-r]
	  manages the zfs-auto-snapshot and bashclub-zsync config on source
    -a ACTION     The action, this script shall execute
    -c CONFIG     Path to the bashclub-zsync config file
    -p PATH       Path of the zfs dataset on source
    -s KEY=VALUE  Set value for specified dataset
    -r            Recursive listing (in combination with -l and -p)
    -h            Show this help text
  ---------------------------------------------------------------------------
  Details of Parameters:
  ACTION: Script actions are 'list' (default), 'set', 'inherit'
  CONFIG: Default is $conf
  KEY:    Following keys can be configured:
          zsync => alias for bashclub:zsync
                   or user defined in bashclub-zsync config
          zas   => alias for com.sun:auto-snapshot
          zasf  => alias for com.sun:auto-snapshot:frequent
          zash  => alias for com.sun:auto-snapshot:hourly
          zasd  => alias for com.sun:auto-snapshot:daily
          zasw  => alias for com.sun:auto-snapshot:weekly
          zasm  => alias for com.sun:auto-snapshot:monthly
          zasz  => alias for com.sun:auto-snapshot:label
                   user defined auto-snapshot label in bashclub-zsync config
  VALUE:  Value can be 'all','subvols','exclude', 'true', 'false'
  ---------------------------------------------------------------------------
    (C) 2023     by Spille IT Solutions for bashclub (github.com/bashclub)
                 Author: Thorsten Spille <thorsten@spille-edv.de>
  ---------------------------------------------------------------------------
	EOF
	exit $1
}

while getopts "hra:c:p:s:" opt; do
  case $opt in
    h) usage 0 ;;
    a) action=$OPTARG ;;
    c) conf=$OPTARG ;;
    p) path=$OPTARG ;;
    s) key=$(echo $OPTARG | cut -d'=' -f 1) value=$(echo $OPTARG | cut -d'=' -f 1) ;;
    r) recursive=1 ;;
    *) usage 1 ;;
  esac
done
shift $((OPTIND-1))

source $conf

if [[ $source == "" ]]; then
    ssh=
    sshport=
else
    sshport=-p$sshport
fi

local_os_id=$($grep -E "^ID=" /etc/os-release | $cut -d'=' -f2)
remote_os_id=$($ssh $source $sshport "grep -E \"^ID=\" /etc/os-release | cut -d'=' -f2")

if [[ $local_os_id == "freebsd" ]]; then
    local_aes=$($grep -o AES /var/run/dmesg.boot | $uniq)
else
    local_aes=$($grep -m1 -o aes /proc/cpuinfo | $uniq)
fi

if [[ $remote_os_id == "freebsd" ]]; then
    remote_aes=$($ssh $source $sshport "grep -o AES /var/run/dmesg.boot | uniq")
else
    remote_aes=$($ssh $source $sshport "grep -m1 -o aes /proc/cpuinfo | uniq")
fi

if [[ $local_aes == "aes" ]] && [[ $remote_aes == "aes" ]]; then
    sshcipher=-caes256-gcm@openssh.com
else
    sshcipher=-cchacha20-poly1305@openssh.com
fi

list (){
    if [ $path != *"/"* ]; then
        p=$path
        if [ $recursive -gt0 ]; then
            rec=-r
        fi
    fi
    list=$($ssh $sshcipher $sshport $source "zfs get -H -t filesystem,volume $tag,com.sun:auto-snapshot,com.sun:auto-snapshot:frequent,com.sun:auto-snapshot:hourly,com.sun:auto-snapshot:daily,com.sun:auto-snapshot:weekly,com.sun:auto-snapshot:monthly,com.sun:auto-snapshot:$zfs_auto_snapshot_label $rec $p")
    for line in $list; do
        
    done
}