#!/bin/bash

toolName=backup

# Get script working directory
# (when called from a different directory)
WDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >>/dev/null 2>&1 && pwd )"
CONFIG=0
CONFIG_FILE_NAME="${toolName}.cfg"
CONFIG_FILE_TEMPLATE="$WDIR/${CONFIG_FILE_NAME}.example"

step_config() {
  initSeqConfig -t "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE"
  if [ $? -eq 0 ] ; then
    CONFIG=1
  else
    echoerr " [E] Check output for errors"
  fi
}

step_1_info() { 
  echo "Backup root [ADDITIONAL_EXCLUDES...]"
  echoinfo "Essential excludes are provided in the configuration template."
  echoinfo "($CONFIG_FILE_TEMPLATE)"
}
step_1_alias() { ALIAS="buroot"; }
step_1() {
  local buTarget="/backup"
  if [ $CONFIG -eq 0 ] ; then
    echoerr " [E] Cannot backup root without properly configured excludes"
    echoerr "     (expected config: $SEQ_CONFIG_HOME/$CONFIG_FILE_NAME)"
  else
    buTarget="$BACKUP_TARGET"
  fi

  # don't use step number
  shift

  step budir / "$buTarget" "${BACKUP_EXCLUDES[@]}" "$@"
}

step_3_info() { 
  echo "Backup <DIRECTORY> <TARGET> [EXCLUDES...]"
  echoinfo "Exclude path notation starts within DIRECTORY."
  echoinfo "e.g. to exclude DIRECTORY/a:"
  echoinfo " $0 budir DIRECTORY TARGET a"
}
step_3_alias() { ALIAS="budir"; }
step_3() {
  # don't use step number
  shift

  if [ -z "$1" ] ; then
    echoerr " [E] Noting found to backup $1"
    exit 1
  fi
  
  BACKUP_LOG=$(basename $1)
  if [ "$BACKUP_LOG" == "/" ] ; then
    BACKUP_LOG="root"
    BACKUP_SOURCE=$1
  else
    # remove trailing slashes
    BACKUP_SOURCE=$(echo $1 | sed 's:/*$::')
  fi
  BACKUP_LOG="backup_${BACKUP_LOG}"
  shift

  if [ -z "$1" ] ; then
    echoerr " [E] No valid target found"
    exit 1
  fi
  BACKUP_TARGET=$(echo $1 | sed 's:/*$::')
  if [ ! -d "${BACKUP_TARGET}" ] && [ ! -L "${BACKUP_TARGET}" ]
  then
    echoerr " [E] Backup target (${BACKUP_TARGET}) doesn't exist"
    exit 1
  fi
  shift

  for exclu in "$@"; do
    BU_EXCLUDES+=("--exclude='$exclu'")
  done
  
  echo " [I] Source  : $BACKUP_SOURCE"
  echo " [I] Target  : $BACKUP_TARGET"
  echo " [I] Excludes: $@"

  #fix doubling trailing slash on verbose output when backing up root
  local buSource="$BACKUP_SOURCE/"
  local buTarget="${BACKUP_TARGET}/$(basename ${BACKUP_SOURCE})"
  if [ "$BACKUP_SOURCE" == "/" ] ; then
    buSource="/"
    buTarget="${BACKUP_TARGET}/"
  fi

  exep "mount -o rw,remount '${BACKUP_TARGET}' >>/dev/null 2>&1"
  exep "mv -f ${BACKUP_TARGET}/${BACKUP_LOG}0.log /tmp/${BACKUP_LOG}1.log 2>/dev/null"
  exep "rsync -avAX --delete --info=stats2 ${BU_EXCLUDES[*]} ${buSource} ${buTarget} > /tmp/${BACKUP_LOG}0.log"

  exe mv -f /tmp/${BACKUP_LOG}*.log ${BACKUP_TARGET}
  exe sync
  exep "mount -o ro,remount '${BACKUP_TARGET}' >>/dev/null 2>&1"
}

VERSION_SEQREV=10
. /usr/local/bin/sequencer.sh