#!/usr/bin/env sh

if [ "$IS_GZIP" = "1" ]; then
  GZIP_BLOCK='gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
    gzip_min_length 1024;'
else
  GZIP_BLOCK=''
fi
export GZIP_BLOCK

if [ -n "$TRUSTED_PROXY_CIDR" ]; then
  REAL_IP_BLOCK="set_real_ip_from $TRUSTED_PROXY_CIDR;
    real_ip_header X-Forwarded-For;
    real_ip_recursive on;"
else
  REAL_IP_BLOCK=""
fi
export REAL_IP_BLOCK

export BACKEND_HOST="${BACKEND_HOST:-app}"
export BACKEND_PORT="${BACKEND_PORT:-9000}"
export FRONTEND_PORT="${FRONTEND_PORT:-''}"
export NGINX_CLIENT_MAX_BODY_SIZE="${NGINX_CLIENT_MAX_BODY_SIZE:-'20m'}"

envsubst '$BACKEND_HOST $BACKEND_PORT $GZIP_BLOCK $REAL_IP_BLOCK $FRONTEND_PORT $NGINX_CLIENT_MAX_BODY_SIZE' \
  < /etc/nginx/templates/default.conf.template \
  > /etc/nginx/conf.d/default.conf

exec nginx -g 'daemon off;'