#!/bin/bash
# Hot-override sparkapi /openapi.yaml with latest spec (no container rebuild / no JWT touch).
set -euo pipefail

SPEC_SRC="${1:-/tmp/openapi.yaml}"
SPEC_DST=/var/www/sparkapi-docs/openapi.yaml
NGINX_CONF=/etc/nginx/conf.d/sparkapi-wyrs.conf
# fallback name used on this host
if [[ ! -f "$NGINX_CONF" ]]; then
  NGINX_CONF=$(ls /etc/nginx/conf.d/sparkapi*.conf 2>/dev/null | grep -v '\.bak' | head -1)
fi
echo "nginx_conf=$NGINX_CONF"

install -d -m 755 /var/www/sparkapi-docs
install -m 644 "$SPEC_SRC" "$SPEC_DST"
wc -c "$SPEC_DST"
grep -c squarenovel "$SPEC_DST" || true

MARKER='# BEGIN sparkapi-openapi-override'
if grep -q "$MARKER" "$NGINX_CONF"; then
  echo "nginx override block already present"
else
  TS=$(date +%Y%m%d%H%M%S)
  cp -a "$NGINX_CONF" "${NGINX_CONF}.bak.openapi.$TS"
  python3 <<PY
from pathlib import Path
p = Path("$NGINX_CONF")
text = p.read_text(encoding="utf-8")
block = '''
    # BEGIN sparkapi-openapi-override
    # Serve latest OpenAPI without rebuilding spark-server image (embed).
    location = /openapi.yaml {
        default_type application/yaml;
        charset utf-8;
        alias /var/www/sparkapi-docs/openapi.yaml;
        add_header Cache-Control "no-store";
        add_header Access-Control-Allow-Origin "*";
    }
    # END sparkapi-openapi-override
'''
needle = "    location / {"
idx = text.find(needle)
if idx < 0:
    raise SystemExit("location / not found in " + str(p))
# insert before the last occurrence of location / inside sparkapi server (HTTPS)
# Prefer inserting before location / that has proxy_pass spark_http
pos = text.rfind("    location / {\n        proxy_pass http://spark_http;")
if pos < 0:
    pos = text.rfind(needle)
text2 = text[:pos] + block + "\n" + text[pos:]
p.write_text(text2, encoding="utf-8")
print("inserted openapi override")
PY
fi

nginx -t
systemctl reload nginx
echo RELOAD_OK

# verify via local loopback Host header if possible
curl -sk -o /tmp/oa.out -w "https_loop:%{http_code} size:%{size_download}\n" -H "Host: sparkapi.wyrs365.com" https://127.0.0.1:8443/openapi.yaml || true
grep -c squarenovel /tmp/oa.out || true
head -c 80 /tmp/oa.out; echo