events {
    worker_connections 1024;
}

http {
    upstream frontend {
        server frontend:3000;
    }
    
    upstream backend {
        server backend:8000;
    }

    server {
        listen 8080;
        server_name localhost;

        location /health {
            access_log off;
            return 200 'ok';
        }

        # ACME HTTP-01 Challenge (automated SSL certificate management)
        location /.well-known/acme-challenge/ {
            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;
        }

        # Frontend React App
        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
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }

        # Backend API
        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;
        }

        # HAProxy Stats (proxy to HAProxy container)
        location /haproxy-stats {
            proxy_pass http://haproxy:8404/stats;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }
    }
}