events {
    worker_connections 1024;
}

http {
    upstream frontend {
        server frontend:3000;
    }

    upstream backend {
        server backend:8000;
    }

    server {
        listen 80;
        server_name _;

        # Allow iframe embedding from portfolio
        add_header Content-Security-Policy "frame-ancestors 'self' https://kschappell.com https://*.kschappell.com" always;

        # API routes to backend
        location /api {
            proxy_pass http://backend;
            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;
        }

        # Everything else to frontend
        location / {
            proxy_pass http://frontend;
            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;

            # WebSocket support for Next.js HMR (dev) and any real-time features
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }

        # Health check endpoint
        location /health {
            return 200 'OK';
            add_header Content-Type text/plain;
        }
    }
}