#!/usr/bin/env bash
set -euo pipefail

shopt -s expand_aliases
source /sync/home_internal/.bash_aliases # FSCLEANUP -> zum besseren testen
# source /sync/home_external/.bash_aliases


sync () {
   dry_run=false
   home_or_root=
   update=true
   in_to_ex=
   while [[ $# > 0 ]]; do
      case $1 in
         -d | --dry      ) dry_run=true;    shift;;
         -c | --checksum ) update=false;    shift;;
         --in-to-ex      ) in_to_ex=true;   shift;;
         --ex-to-in      ) in_to_ex=false;  shift;;
         --dir           ) home_or_root=$2; shift 2;;
         *               ) break ;; # Anything else stops command line processing.
      esac
   done

   dir_external=/sync/${home_or_root}_external/
   dir_internal=/sync/${home_or_root}_internal/
   # dry-run
   if [[ "$dry_run" == true ]]; then
      ex_to_in=
      in_to_ex=
      update_or_default=
      if [[ "$update" == true ]]; then
         update_or_default='UPDATE'
         ex_to_in=$(rsync_update $dir_external $dir_internal --dry-run)
         in_to_ex=$(rsync_update $dir_internal $dir_external --dry-run)
      else
         update_or_default='DEFAULT'
         ex_to_in=$(rsync_default $dir_external $dir_internal --dry-run)
         in_to_ex=$(rsync_default $dir_internal $dir_external --dry-run)
      fi
      # use printf for displaying \n as newline correctly
      printf "RSYNC ${update_or_default}: external -> internal:\n\n$ex_to_in\n\nRSYNC ${update_or_default}: internal -> external:\n\n$in_to_ex\n"
      exit 0;
   fi

   # real deal
   if [[ -z "$in_to_ex" ]]; then
      echo "Error. No sync direction given."
      exit 1;
   fi

   if [[ "$update" == true ]]; then
      if [[ "$in_to_ex" == true ]]; then
         rsync_update $dir_internal $dir_external
      else
         rsync_update $dir_external $dir_internal
      fi
      exit 0;
   fi
   if [[ "$in_to_ex" == true ]]; then
      rsync_default $dir_internal $dir_external
   else
      rsync_default $dir_external $dir_internal
   fi
}