#!/usr/bin/env bash
# Insert / update Meshkee SEO proxy locations on an existing storefront nginx site.
# Covers: /sitemap.xml (index), /sitemap-main.xml, /sitemap-products.xml, /robots.txt
set -euo pipefail

HOST="${1:-}"
API_HOST="${MESHKEE_API_HOST:-api.meshkee.com}"

if [[ -z "$HOST" ]]; then
  echo "usage: patch-nginx-seo.sh <host>" >&2
  exit 1
fi

NGINX_AVAILABLE="/etc/nginx/sites-available/$HOST"

if [[ ! -f "$NGINX_AVAILABLE" ]]; then
  echo "missing nginx site for $HOST" >&2
  exit 1
fi

proxy_location() {
  local path="$1"
  local upstream="$2"
  cat <<NGINX
    location = ${path} {
        proxy_pass https://${API_HOST}/api/v1/tenants/${HOST}/${upstream};
        proxy_set_header Host ${API_HOST};
        proxy_ssl_server_name on;
        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 \$scheme;
        add_header Cache-Control "public, max-age=900";
    }

NGINX
}

ensure_location() {
  local path="$1"
  local upstream="$2"
  if grep -q "location = ${path}" "$NGINX_AVAILABLE"; then
    echo "already present: ${path}"
    return 0
  fi

  local block
  block="$(proxy_location "$path" "$upstream")"
  local tmp
  tmp="$(mktemp)"
  awk -v block="$block" '
    /location \/ \{/ && !done {
      print block
      done = 1
    }
    { print }
  ' "$NGINX_AVAILABLE" >"$tmp"
  mv "$tmp" "$NGINX_AVAILABLE"
  echo "added: ${path}"
}

ensure_location /sitemap.xml sitemap.xml
ensure_location /sitemap-main.xml sitemap-main.xml
ensure_location /sitemap-products.xml sitemap-products.xml
ensure_location /robots.txt robots.txt

nginx -t
systemctl reload nginx
echo "patched nginx SEO locations for $HOST"