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

VER="2.0.0"

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 " "
}

#
# Script muss unter root bzw. sudo laufen, sonst gibt es jede Menge Probleme
# mit Zugriff auf die diversen Verzeichnisse.
# 
if [ "$(id -u)" -ne 0 ]; then
    echo "**"
    echo "** ERROR: script has to be run as superuser!"
    echo "**"
    exit 100
fi

HERE=$(dirname "$0")
THIS_SCRIPT=$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 101
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 102
fi

log_file_name="$(realpath $HERE/../../../log/backup/$HOST_NAME-$(date '+%Y-%m-%d_%H%M'))"
LOG_FILE="${log_file_name}.log"

file=
archive=

while :; do
    case $1 in
        -h|-\?|--help)
            show_help    # Display a usage synopsis.
            exit 0
            ;;
        -d|--daily) 
            MAIL_LOG_FILE="${log_file_name}.auto.log"
            backup_daily 
            break 
            ;;
        -w|--weekly) 
            MAIL_LOG_FILE="${log_file_name}.auto.log"
            backup_weekly
            break 
            ;;
        -e|--export) 
            MAIL_LOG_FILE="${log_file_name}.auto.log"
            export_backups
            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
            ;;
        --)              # 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