#!/usr/bin/env bash

show_help() {
    echo "usage: $0 options"
    echo "       -a, --auto      start nightly backup"
    echo "       -l, --list      list archives" 
    echo '       -c, --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 "    ### main.sh"

# Initialize all the option variables.
# This ensures we are not contaminated by variables from the environment.
file=
archive=

while :; do
    case $1 in
        -h|-\?|--help)
            show_help    # Display a usage synopsis.
            exit 0
            ;;
        -a|--auto) 
            shift 
            . $HERE/$HOST_NAME.sh "$@" >$LOGF 2>&1
            break # exit kehrt nicht zu run.sh zurück
            ;;
        -l|--list)
            . $HERE/$HOST_NAME.sh -l
            break;
            ;;
        -c|--content)
            if [ "$2" ]; then
                echo "not yet implemented"
                #. $HERE/$HOST_NAME.sh -c $2
            else
                echo 'ERROR: "--content" requires a non-empty option argument.'
            fi
            break
            ;;
        -r|--restore)
            if [ "$2" ]; then
                echo "not yet implemented"
                archive=$2
                shift
                #. $HERE/$HOST_NAME.sh -r $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