#!/bin/bash -ex

usage() {
    set +x
    cat 1>&2 <<HERE
Script for integrating BigBlueButton Recordings with Scaleite.
USAGE:
    wget -qO- https://raw.githubusercontent.com/jfederico/scalelite-run/master/init-recordings-bigbluebutton.sh | bash -s -- [OPTIONS]
OPTIONS
  -s <scalelite-hostname>          Configure server with <scalelite-hostname> (required)
EXAMPLES:
Sample options for setup a BigBlueButton server
    -s scalelite.example.com
HERE
}

main() {
  export DEBIAN_FRONTEND=noninteractive
  while builtin getopts "s" opt "${@}"; do

    case $opt in
      s)
        HOST=$OPTARG
        if [ "$HOST" == "scalelite.example.com" ]; then
          err "You must specify a valid hostname (not the hostname given in the docs)."
        fi
        ;;
    esac
done

if [ ! -z "$HOST" ]; then
  check_host $HOST
fi


# We can proceed with the setup
echo 'Create a new group with GID 2000...'
groupadd -g 2000 scalelite-spool
echo 'Add the bigbluebutton user to the group...'
usermod -a -G scalelite-spool bigbluebutton

echo 'Add recording transfer scripts...'
cd /usr/local/bigbluebutton/core/scripts/post_publish
wget -O post_publish_scalelite.rb https://raw.githubusercontent.com/blindsidenetworks/scalelite/master/bigbluebutton/scalelite_post_publish.rb

echo 'Add recording transfer settings...'
cd /usr/local/bigbluebutton/core/scripts
wget https://raw.githubusercontent.com/blindsidenetworks/scalelite/master/bigbluebutton/scalelite.yml
echo "spool_dir: bigbluebutton@$URL_HOST:/var/bigbluebutton/spool" | tee -a /usr/local/bigbluebutton/core/scripts

echo 'Generate ssh key pair...'
mkdir /home/bigbluebutton
chown bigbluebutton.bigbluebutton /home/bigbluebutton/
su - bigbluebutton -s /bin/bash -c "ssh-keygen -t ed25519 -N '' -f ~/.ssh/id_rsa"

echo 'Add this key to /home/bigbluebutton/.ssh/authorized_keys in scalelite:'
cat /home/bigbluebutton/.ssh/scalelite.pub

echo 'done'

check_host() {
  if [ [ -z "$HOST" ] then
    need_pkg dnsutils apt-transport-https net-tools
    DIG_IP=$(dig +short $1 | grep '^[.0-9]*$' | tail -n1)
    if [ -z "$DIG_IP" ]; then err "Unable to resolve $1 to an IP address using DNS lookup.";  fi
    get_IP $1
    if [ "$DIG_IP" != "$IP" ]; then err "DNS lookup for $1 resolved to $DIG_IP but didn't match local $IP."; fi
  fi
}