#!/bin/bash

# check for certbot and nginx
if dpkg -l | grep -qw "certbot"; then
  echo "# certbot is already installed"
else
  sudo apt install -y certbot
fi
if dpkg -l | grep -qw "nginx"; then
  echo "# nginx is already installed"
else
  sudo apt install -y nginx
fi

echo "
Input your email:
"
read EMAIL

echo "
Input a subdomain set up with an A record pointing to this server:
eg.: mempool.example.com
"
read SUBDOMAIN

echo "
Input the URL where the server is running:
eg.: http://192.168.1.42:5000
"
read SERVER

echo "
Input the address of the relay after the IPaddress or domain:
eg.: /nostrrelay/nNZ59JFH
"
read RELAY

sudo certbot certonly -a standalone -m $EMAIL --agree-tos \
  -d $SUBDOMAIN --expand -n --pre-hook "service nginx stop" \
  --post-hook "service nginx start" || exit 1

# copy in place on a remote machine if needed
#sudo cat /etc/letsencrypt/live/$SUBDOMAIN/fullchain.pem
#sudo cat /etc/letsencrypt/live/$SUBDOMAIN/privkey.pem

# add to /etc/nginx/sites-available/
echo "\
server {
  listen 80;
  listen 443 ssl;
  server_name $SUBDOMAIN;

  ssl_certificate /etc/letsencrypt/live/$SUBDOMAIN/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/$SUBDOMAIN/privkey.pem;
  ssl_session_timeout 1d;
  ssl_session_cache shared:SSL:50m;
  ssl_session_tickets off;
  ssl_protocols TLSv1.2 TLSv1.3;
  ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!3DES:!MD5:!PSK';
  ssl_prefer_server_ciphers on;
  ssl_stapling on;
  ssl_stapling_verify on;
  ssl_trusted_certificate /etc/letsencrypt/live/$SUBDOMAIN/chain.pem;

  location / {
    proxy_pass ${SERVER}${RELAY};

    # WebSocket support
    proxy_http_version 1.1;
    proxy_set_header Upgrade \$http_upgrade; # Upgrade header for WebSocket
    proxy_set_header Connection \"upgrade\"; # Connection header for WebSocket

    # Additional headers
    proxy_set_header Host \$host;
    proxy_set_header X-Real-IP \$remote_addr;
    proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto https;

    # Disable proxy redirects
    proxy_redirect off;
  }
}" | sudo tee /etc/nginx/sites-available/$SUBDOMAIN

# edit with
# sudo nano /etc/nginx/sites-available/$SUBDOMAIN

# add to /etc/nginx/sites-enabled/
sudo ln -s /etc/nginx/sites-available/$SUBDOMAIN /etc/nginx/sites-enabled/

sudo nginx -t || exit 1

sudo systemctl restart nginx
