server {
  listen 80;
  server_name _;

  # SPA static files
  root /var/www/ops-core/dist;
  index index.html;

  # React Router history mode
  location / {
    try_files $uri $uri/ /index.html;
  }

  # Reverse proxy to FastAPI (same-origin /api)
  location /api/ {
    proxy_http_version 1.1;
    proxy_set_header Host $host;
    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;

    # keep cookie + auth headers intact
    proxy_pass http://127.0.0.1:8000/;
  }

  # Backend mounted static (/data) for downloads/preview
  location /data/ {
    proxy_http_version 1.1;
    proxy_set_header Host $host;
    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;
    proxy_pass http://127.0.0.1:8000/data/;
  }

  # SSE: disable buffering to stream tokens immediately
  location = /api/projects/analyze_stream {
    proxy_http_version 1.1;
    proxy_set_header Host $host;
    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;

    proxy_buffering off;
    proxy_cache off;
    proxy_read_timeout 1h;
    proxy_send_timeout 1h;
    chunked_transfer_encoding off;
    add_header X-Accel-Buffering no;

    proxy_pass http://127.0.0.1:8000/projects/analyze_stream;
  }
}