#!/bin/bash

# creates trash email for registration for online-services
# email is hashed from domain of service + login-username from linux-system
# or only unhashed service-domain
# this created email-address is added to LDAP target email als dcMailAlias
# also added to pass passwordmanager of user

[ -e ${MSC_BASE}/defaults.conf ] && . ${MSC_BASE}/defaults.conf

LDAP_HOST=${LDAP_HOST_DEFAULT}
BIND_DN=${LDAP_ADMIN_BIND_DN}
PASS_ID=${PASS_ID_LDAP_ADMIN}
OWN_DOMAIN=${TRASHMAIL_OWN_DOMAIN_DEFAULT}
TARGET_MAIL=${TRASHMAIL_TARGET_MAIL_DEFAULT}
HASHED_DEFAULT=${TRASHMAIL_HASHED_DEFAULT}

set -- $(getopt -u -o fh --long force,hashed,not-hashed -- "$@" )

while : ; do
    case $1 in
        -n|--not-hashed)
            HASHED=false
            shift
            ;;
        -h|--hashed)
            HASHED=true
            shift
            ;;
        -f|--force)
            FORCE=true
            shift
            ;;
        --)
            shift
            break
            ;;
        *)
            wrong argument $1
            shift
            continue
            ;;
    esac
done

URL=$1

case $URL in
    http*)
        DEST_DOMAIN=$(echo $URL|awk -F/ '{print $3}')
        ;;
    [a-zA-Z]*)
        DEST_DOMAIN=${URL,,}
        ;;
    *)
        logwarn "$URL is no regular url"
        exit 1
        ;;
esac
echo "Create a trashmail-address for ${DEST_DOMAIN}" >&2


if ${HASHED:-$HASHED_DEFAULT}; then
    TRASHUSER="$(echo ${DEST_DOMAIN}${USER}|md5sum -|awk '{print $1}')"
else
    TRASHUSER=${DEST_DOMAIN}
fi

TRASHMAIL=${TRASHUSER}@${OWN_DOMAIN}
echo $TRASHMAIL

PASS_ENTRY="${PASS_PREFIX%/}${PASS_PREFIX:+/}${DEST_DOMAIN}/${TRASHMAIL}"

set -x
cat << EOF |ldapmodify -Z -H ldap://${LDAP_HOST} -D ${BIND_DN} -x -w $(pass ${PASS_ID}|head -n 1)
dn: dcSubMailAddress=${TARGET_MAIL},ou=mailaccounts,dc=schuerz,dc=at
changetype: modify
add: dcMailAlternateAddress
dcMailAlternateAddress: ${TRASHMAIL}
EOF

if [ $? -gt 0 ]; then
    echo pass find ${PASS_ENTRY}
    pass find ${TRASHMAIL}
    pass find ${TRASHMAIL}|grep -v "Search Terms"
    case $? in
        1)
            # returncode 1 from grep means, no line selected. so no entry exists, create new one
            echo "TEST1"
            CREATE=true
            ;;
        0)
            echo FORCE: ${FORCE-false}
            if ${FORCE-false} ; then
                CREATE=true
            else
                echo "Current password for ${PASS_ENTRY} is $(pass ${PASS_ENTRY} |head -n1)."
                read -p "Overwrite? [Y|n]: "
                echo ""
                case $REPLY in
                    y|Y)
                        CREATE=true
                        ;;
                    *)
                        CREATE=false
                        ;;
                esac
            fi
            ;;
        *)
            echo "Something went wrong"
            exit 2
            ;;
    esac
else
    CREATE=true
fi

if ${CREATE-false}; then
cat << EOF |pass insert -m ${PASS_ENTRY}
$(pwgen -y 50 1)
email: ${TRASHMAIL}
login: ${TRASHUSER}
url: ${URL}
comment: trashemail autogenerated, delete, when delete account there
EOF
fi
set +x
    #pass git commit "${PASS_ENTRY}"
    pass -c ${PASS_ENTRY}