worker_processes auto;
pid /tmp/nginx.pid;

events {
    worker_connections 1024;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Temp paths for non-root
    client_body_temp_path /tmp/nginx-client-body;
    proxy_temp_path /tmp/nginx-proxy;
    fastcgi_temp_path /tmp/nginx-fastcgi;
    uwsgi_temp_path /tmp/nginx-uwsgi;
    scgi_temp_path /tmp/nginx-scgi;

    sendfile on;
    tcp_nopush on;
    keepalive_timeout 65;
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml;

    # Logging
    access_log /tmp/nginx-access.log;
    error_log /tmp/nginx-error.log;

    server {
        listen 7860;
        server_name _;

        # Frontend static files
        root /app/frontend;
        index index.html;

        # API proxy → FastAPI
        location /api/ {
            proxy_pass http://127.0.0.1:8000;
            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;

            # Timeouts
            proxy_connect_timeout 10s;
            proxy_send_timeout 30s;
            proxy_read_timeout 30s;
        }

        # Health check
        location /health {
            proxy_pass http://127.0.0.1:8000;
        }

        # Frontend SPA fallback
        location / {
            try_files $uri $uri/ /index.html;
        }

        # Security headers (X-Frame-Options removed to allow HF Spaces iframe embedding)
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    }
}