events {
    worker_connections 1024;
}

http {
    # Upstreams
    upstream frontend {
        server frontend:8501;
    }

    upstream api {
        server api:8000;
    }

    upstream api_users {
        server api_users:8090;
    }

    # Redirección HTTP -> HTTPS
    server {
        listen 80;
        server_name localhost;  # Cambiar por tu dominio
        return 301 https://$host$request_uri;
    }

    # Servidor HTTPS
    server {
        listen 443 ssl;
        server_name localhost;  # Cambiar por tu dominio

        # Certificados SSL
        ssl_certificate     /etc/nginx/ssl/fullchain.pem;
        ssl_certificate_key /etc/nginx/ssl/privkey.pem;

        # Configuración SSL robusta (recomendada)
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers on;
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;

        # Headers de seguridad
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;

        # Frontend (Streamlit) - ruta raíz
        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;

            # Soporte WebSocket (Streamlit)
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            # Timeouts
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # API Feeder (FastAPI en puerto 8000)
        location /api/ {
            rewrite ^/api/(.*)$ /$1 break;
            proxy_pass http://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;
            proxy_set_header X-Forwarded-Proto $scheme;

            # Timeouts
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # API Usuarios (FastAPI en puerto 8090)
        location /users/ {
            rewrite ^/users/(.*)$ /$1 break;
            proxy_pass http://api_users;
            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 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
        }

        # Opcional: estado de Nginx
        location /nginx_status {
            stub_status;
            allow 127.0.0.1;
            deny all;
        }
    }
}