#!/bin/bash
#
# entrypoint for all actions
#

show_help() {
    echo "usage: $0 options"
    echo "       -d, --daily     start daily backup on local machine"
    echo "       -w, --weekly    start weekly backup on local machine"
    echo "       --list          list archives" 
    echo '       --content <archive> '
    echo "                       show contents of archive"
    echo '       -r, --restore <archive> <file(s)> ' 
    echo "                       restore files from archive to pwd"
    echo "       -h, -?. --help  show this help"
    echo " "
    echo " Script muss auf dem jeweiligen Server ausgeführt werden (ggf. via ssh)."
    echo " "
}

HERE=$(dirname "$0")

if [ -f $HERE/main.inc.sh ]; then
    . $HERE/main.inc.sh
else
    echo "**"
    echo "** ERROR: Datei \"$HERE/main.inc.sh\" nicht gefunden. "
    echo "**        Script wird abgebrochen"
    echo "**"
    show_help
    exit 1
fi

if [ -f $HERE/$HOST_NAME.sh ]; then
    . $HERE/$HOST_NAME.sh
else
    echo "**"
    echo "** ERROR: Datei \"$HOST_NAME.sh\" nicht gefunden (falscher Rechner?). "
    echo "**        Script wird abgebrochen."
    echo "**"
    show_help
    exit 2
fi

LOG_FILE="$NAS_ROOT/log/$LOG_FILE-$(date '+%Y-%m-%d_%H%M').log"

file=
archive=

while :; do
    case $1 in
        -h|-\?|--help)
            show_help    # Display a usage synopsis.
            exit 0
            ;;
        -d|--daily) 
            LOG_FILE=$BACKUP_TARGET/backup.log
            backup_daily 
            break 
            ;;
        -w|--weekly) 
            LOG_FILE=$BACKUP_TARGET/backup.log
            backup_weekly
            break 
            ;;
        --list)
            list_archives "$NAS_ROOT/daily/$HOST_NAME"
            if [ -d "$NAS_ROOT/weekly/$HOST_NAME" ]; then
                list_archives "$NAS_ROOT/weekly/$HOST_NAME"
            fi
            break;
            ;;
        --content)
            if [ "$2" ]; then
                list_archive_content "$NAS_ROOT" "$2"
            else
                echo 'ERROR: "--content" requires a non-empty option argument.'
            fi
            break
            ;;
        -r|--restore)
            if [ "$2" ]; then
                archive=$2
                shift
                restore "$archive" "$@"
            else
                echo 'ERROR: "--restore" requires a non-empty option argument.'
            fi
            break
            ;;

    # --- example -> https://mywiki.wooledge.org/BashFAQ/035
        -f|--file)       # Takes an option argument; ensure it has been specified.
            if [ "$2" ]; then
                file=$2
                shift
            else
                die 'ERROR: "--file" requires a non-empty option argument.'
            fi
            ;;
        --file=?*)
            file=${1#*=} # Delete everything up to "=" and assign the remainder.
            ;;
        --file=)         # Handle the case of an empty --file=
            die 'ERROR: "--file" requires a non-empty option argument.'
            ;;
        --)              # End of all options.
            shift
            break
            ;;
        -?*)
            echo "WARN: Unknown option (ignored): $1" 
            echo
            show_help
            exit
            ;;
        *)               # Default case: No more options, so break out of the loop.
            break
    esac

    shift
done

exit 0