events {
    worker_connections 1024;
}

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

    # Logs
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    # Gzip
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;

    # Upstream para FastAPI
    upstream app {
        server app:8000;
    }

    # Upstream para Flower (monitor de Celery)
    upstream flower {
        server flower:5555;
    }

    server {
        listen 80;
        server_name localhost;

        # Redirigir a HTTPS en producción
        # return 301 https://$server_name$request_uri;

        location / {
            proxy_pass http://app;
            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";
        }

        # API
        location /api {
            proxy_pass http://app;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        # Archivos estáticos
        location /static {
            alias /usr/share/nginx/html/static;
            expires 30d;
            add_header Cache-Control "public, immutable";
        }

        # Flower (monitor de Celery) - proteger en producción
        location /flower/ {
            proxy_pass http://flower/;
            proxy_set_header Host $host;
            proxy_redirect off;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }

        # Health check
        location /health {
            proxy_pass http://app/api/health;
        }
    }

    # HTTPS server (descomentar en producción)
    # server {
    #     listen 443 ssl http2;
    #     server_name localhost;
    #
    #     ssl_certificate /etc/nginx/ssl/cert.pem;
    #     ssl_certificate_key /etc/nginx/ssl/key.pem;
    #
    #     ssl_protocols TLSv1.2 TLSv1.3;
    #     ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256;
    #     ssl_prefer_server_ciphers off;
    #
    #     # ... mismas locations que HTTP ...
    # }
}