worker_processes 1;

events {
    worker_connections 1024;
}

http {
    include mime.types;
    default_type application/octet-stream;
    
    # Increase maximum upload size if needed (e.g. for student code or large bodies)
    client_max_body_size 50M;

    server {
        # This port will be replaced dynamically in start.sh
        listen 7860;
        server_name _;

        # Route API to FastAPI
        location /api/ {
            proxy_pass http://127.0.0.1:8000/api/;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        # WebSocket support for Streamlit
        location /_stcore/stream {
            proxy_pass http://127.0.0.1:8501/_stcore/stream;
            proxy_http_version 1.1;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_read_timeout 86400;
        }

        # Route remaining to Streamlit
        location / {
            proxy_pass http://127.0.0.1:8501/;
            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 Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
}