#!/bin/bash

set -e
cd $(dirname $0)/..

EXTERNAL_IP=$(curl -s http://whatismyip.akamai.com)

# load .env
if [ -f .env ]
then
  echo "Error: the configuration file .env already exists."
  echo "either edit variables manually in there or remove the file and try this script again"
  exit 1
fi

greenlight="n"
while [[ ! $greenlight =~ ^(y|n)$ ]]; do
    read -p "Should greenlight be included? (y/n): " greenlight
done

https_proxy="n"
while [[ ! $https_proxy =~ ^(y|n)$ ]]; do
    read -p "Should an automatic HTTPS Proxy be included? (y/n): " https_proxy
done

DOMAIN=""
while [[ -z "$DOMAIN" ]]; do
    read -p "Please enter the domain name: " DOMAIN
done

ip_correct=""
while [[ ! $ip_correct =~ ^(y|n)$ ]]; do
    read -p "Is $EXTERNAL_IP your external IPv4 address? (y/n): " ip_correct
done

if [ ! "$ip_correct" == "y" ]
then
    EXTERNAL_IP=""
    while [[ ! $EXTERNAL_IP =~ ^[1-9][0-9]{0,2}\.[1-9][0-9]{0,2}\.[1-9][0-9]{0,2}\.[1-9][0-9]{0,2}$ ]]; do
        read -p "Please enter correct IPv4 address: " EXTERNAL_IP
    done
fi



# write settings
cp sample.env .env
sed -i "s/EXTERNAL_IP=.*/EXTERNAL_IP=$EXTERNAL_IP/" .env
sed -i "s/DOMAIN=.*/DOMAIN=$DOMAIN/" .env

if [ ! "$greenlight" == "y" ]
then
    sed -i "s/ENABLE_GREENLIGHT.*/#ENABLE_GREENLIGHT=true/" .env
fi

if [ ! "$https_proxy" == "y" ]
then
    sed -i "s/ENABLE_HTTPS_PROXY.*/#ENABLE_HTTPS_PROXY=true/" .env
fi

# change secrets
RANDOM_1=$(pwgen -v 40 1)
RANDOM_2=$(pwgen -v 40 1)
RANDOM_3=$(pwgen -v 120 1)
sed -i "s/SHARED_SECRET=.*/SHARED_SECRET=$RANDOM_1/" .env
sed -i "s/ETHERPAD_API_KEY=.*/ETHERPAD_API_KEY=$RANDOM_2/" .env
sed -i "s/RAILS_SECRET=.*/RAILS_SECRET=$RANDOM_3/" .env

echo "--------------------------------------------------"
echo "configuration file .env got successfully created!"
echo ""
echo "you can look through it for further adjusments"
echo "  $ nano .env"
echo ""
echo "to start bigbluebutton run"
echo "  $ ./scripts/compose up -d"