#!/bin/sh

script_name=$0
force=$(test "$1" = force && echo true || echo false)

function usage() {
    if test $# -gt 0
    then
        echo "$@"
        echo
        echo ---------
        echo
    fi
    echo "$script_name [force]"
    echo generates secrets
    echo overwrites files if "force" is passed as an argument
    exit 1
}

# Generate a random base64 string of $1 random bytes. The length argument is the
# number of bytes the base64 string represents, not the length of the string.
function randomString() {
    openssl rand -base64 ${1:-36}
}

openssl version > /dev/null || usage error: openssl is not installed

if test -s mounts/wopi/wopi.secret && test $force = false
then
    echo WOPI secret already exists, not generating a new secret
else
    randomString 48 > mounts/wopi/wopi.secret
fi

source ./.env

if test -z "$COLLABORA_ADMIN_USER"
then
    echo COLLABORA_ADMIN_USER=$(randomString 24) >> .env
else
    if test $force = false
    then
        echo Collabora username already generated, not overwriting
    else
        echo Collabora username was already $COLLABORA_ADMIN_USER, overwriting
        sed -i "s/^(COLLABORA_ADMIN_USER=).+\$/\1$(randomString 24)/" .env
    fi
fi

if test -z "$COLLABORA_ADMIN_PASSWORD"
then
    echo COLLABORA_ADMIN_PASSWORD=$(randomString 36) >> .env
else
    if test $force = false
    then
        echo Collabora password already generated, not overwriting
    else
        echo Collabora password was already $COLLABORA_ADMIN_PASSWORD, overwriting
        sed -i "s/^(COLLABORA_ADMIN_PASSWORD=).+\$/\1$(randomString 24)/" .env
    fi
fi