#!/usr/bin/env bash
# Insert Meshkee SEO proxy locations (/sitemap.xml, /robots.txt) into an existing storefront nginx site.
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

if grep -q 'location = /sitemap.xml' "$NGINX_AVAILABLE"; then
  echo "nginx SEO locations already present for $HOST"
  exit 0
fi

TMP="$(mktemp)"
SEO_BLOCK="$(cat <<NGINX
    location = /sitemap.xml {
        proxy_pass https://${API_HOST}/api/v1/tenants/${HOST}/sitemap.xml;
        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";
    }

    location = /robots.txt {
        proxy_pass https://${API_HOST}/api/v1/tenants/${HOST}/robots.txt;
        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
)"

awk -v block="$SEO_BLOCK" '
  /location \/ \{/ && !done {
    print block
    done = 1
  }
  { print }
' "$NGINX_AVAILABLE" >"$TMP"

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