server {
    listen 80;
    server_name localhost; # Oder deine Domain

    # Root-Verzeichnis für statische Dateien
    root /usr/share/nginx/html;
    index index.html;

    # Logging (optional, aber nützlich)
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    # Clean URL rewrites - Map short URLs to actual HTML files
    rewrite ^/dns$ /dns-lookup.html last;
    rewrite ^/dns-lookup$ /dns-lookup.html last;
    rewrite ^/whois$ /whois-lookup.html last;
    rewrite ^/whois-lookup$ /whois-lookup.html last;
    rewrite ^/mac$ /mac-lookup.html last;
    rewrite ^/mac-lookup$ /mac-lookup.html last;
    rewrite ^/subnet$ /subnet-calculator.html last;
    rewrite ^/subnet-calculator$ /subnet-calculator.html last;
    rewrite ^/asn$ /asn-lookup.html last;
    rewrite ^/asn-lookup$ /asn-lookup.html last;

    # Statische Dateien direkt ausliefern
    location / {
        # First try the exact URI, then with .html, then fall back to index.html
        try_files $uri $uri.html $uri/ /index.html;
    }

    # API-Anfragen an den Backend-Service weiterleiten
    location /api/ {
        # Der Name 'backend' muss dem Service-Namen in docker-compose.yml entsprechen
        proxy_pass http://backend:3000; # Leitet an den Backend-Container auf Port 3000 weiter

        # Wichtige Proxy-Header setzen
        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;

        # Header für Server-Sent Events (Traceroute)
        proxy_set_header Connection '';
        proxy_http_version 1.1;
        proxy_buffering off; # Wichtig für Streaming
        proxy_cache off; # Wichtig für Streaming
        proxy_read_timeout 300s; # Längerer Timeout für potenziell lange Traceroutes
    }
}

# Upstream-Definition (optional, aber sauberer für proxy_pass)
# upstream backend_server {
#    server backend:3000;
# }
# Dann in location /api/: proxy_pass http://backend_server;