server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # ── SSE-Endpunkt (kein Puffern, langer Timeout) ────────────
    location /api/label-print-agent/events {
        proxy_pass http://backend:3100/api/label-print-agent/events;
        proxy_http_version 1.1;
        proxy_set_header Connection '';
        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;
        proxy_buffering off;
        proxy_cache off;
        proxy_read_timeout 24h;
        chunked_transfer_encoding on;
    }

    # ── API Reverse Proxy → Backend-Container ──────────────────
    # Im Docker-Netzwerk ist "backend" der Service-Name aus docker-compose.
    location /api/ {
        proxy_pass http://backend:3100/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;
        proxy_read_timeout 300s;
        client_max_body_size 50M;
    }

    # Webhook ebenfalls zum Backend durchreichen
    location /webhook/ {
        proxy_pass http://backend:3100/webhook/;
        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;
    }

    # ── SPA Fallback ──────────────────────────────────────────
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Caching für statische Assets
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Kein Caching für index.html und env-config.js
    location = /index.html {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }

    location = /env-config.js {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }
}