#!/usr/bin/env bash
set -e

# Defaults — overridable via env in compose / docker run.
: "${NGINX_UPSTREAM_SHOP:=shop:9999}"
: "${NGINX_UPSTREAM_CMS:=cms:5555}"
: "${NGINX_CACHE_LIFETIME:=1h}"
export NGINX_UPSTREAM_SHOP NGINX_UPSTREAM_CMS NGINX_CACHE_LIFETIME

# Render the template only when the nginx.conf in place is the
# upstream nginx-image stock default. Adapters that mount their own
# config via compose `configs:` (e.g. mp) get the file replaced
# before this script runs; we detect that by the absence of the
# stock `worker_processes  auto;` line and leave that file alone.
if [ -f /etc/nginx/nginx.conf.template ] \
   && grep -q "worker_processes  auto;" /etc/nginx/nginx.conf 2>/dev/null; then
  envsubst '${NGINX_UPSTREAM_SHOP} ${NGINX_UPSTREAM_CMS} ${NGINX_CACHE_LIFETIME}' \
    < /etc/nginx/nginx.conf.template \
    > /etc/nginx/nginx.conf
  echo "→ libreshop default nginx.conf rendered from template"
else
  echo "→ adapter-provided nginx.conf detected; leaving untouched"
fi

mkdir -p /cache/shop /cache/uploads /cache/api

echo "Effective nginx.conf:"
echo "---"
cat /etc/nginx/nginx.conf
echo "---"

if [ "$NGINX_DEBUG" = "true" ]; then
  perl -i -pe 's|error_log /dev/stdout error|error_log /dev/stdout debug|' /etc/nginx/nginx.conf
  exec nginx-debug -g 'daemon off;'
else
  exec nginx -g 'daemon off;'
fi