Global
High-Speed
Deployment.

// middleware.ts — laeuft am Edge in V8 Isolates
import { NextResponse, type NextRequest } from "next/server";

export const config = {
  matcher: ["/((?!_next|api|favicon.ico|assets).*)"],
};

// Land-Locale-Mapping (erweitern nach Bedarf)
const LOCALE_MAP: Record<string, string> = {
  US: "en-us",
  CA: "en-us",
  GB: "en-gb",
  DE: "de",
  AT: "de",
  CH: "de",
  FR: "fr",
  JP: "ja",
};

export function middleware(request: NextRequest) {
  // Vercel injiziert geo-Header aus dem Edge-Node
  const country = request.geo?.country ?? "DE";
  const locale  = LOCALE_MAP[country] ?? "en-us";

  const { pathname, search } = request.nextUrl;

  // Bereits auf einer Locale-Route? Nichts tun.
  if (/^\/(en-us|en-gb|de|fr|ja)(\/|$)/.test(pathname)) {
    return NextResponse.next();
  }

  // Rewrite auf die richtige Locale — ohne Redirect
  const url = request.nextUrl.clone();
  url.pathname = `/${locale}${pathname}`;

  const response = NextResponse.rewrite(url);

  // Geo-Header fuer Analytics weitergeben
  response.headers.set("x-user-country", country);
  response.headers.set("x-user-locale",  locale);

  return response;
}

// app/api/hello/route.ts
import { NextResponse, type NextRequest } from "next/server";

// >>> Edge Runtime aktivieren <<<
// Laeuft in V8 Isolates, 0ms Cold Start, ~1.5MB Memory-Limit
export const runtime = "edge";

// Optional: Regions einschraenken (default = alle 300+ Nodes)
export const preferredRegion = ["fra1", "cdg1", "iad1", "hnd1"];

export async function GET(request: NextRequest) {
  const country = request.geo?.country ?? "DE";
  const city    = request.geo?.city    ?? "Duesseldorf";
  const region  = request.geo?.region  ?? "NRW";

  // Edge Runtime unterstuetzt Web Crypto ohne Import
  const nonce = crypto.randomUUID();

  return NextResponse.json(
    {
      greeting: `Hallo aus ${city}, ${region} (${country})`,
      nonce,
      servedBy: "vercel-edge",
      timestamp: Date.now(),
    },
    {
      headers: {
        // 60s CDN-Cache + stale-while-revalidate
        "Cache-Control":
          "public, s-maxage=60, stale-while-revalidate=3600",
        "x-edge-region": process.env.VERCEL_REGION ?? "unknown",
      },
    },
  );
}

{
  "cleanUrls": true,
  "trailingSlash": false,
  "headers": [
    {
      "source": "/_next/static/(.*)",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "public, max-age=31536000, immutable"
        }
      ]
    },
    {
      "source": "/(.*)\\.(jpg|jpeg|png|webp|avif|svg|woff2)",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "public, max-age=2592000, stale-while-revalidate=86400"
        }
      ]
    },
    {
      "source": "/(.*)",
      "headers": [
        { "key": "Strict-Transport-Security",
          "value": "max-age=63072000; includeSubDomains; preload" },
        { "key": "X-Content-Type-Options", "value": "nosniff" },
        { "key": "X-Frame-Options",        "value": "DENY" },
        { "key": "Referrer-Policy",
          "value": "strict-origin-when-cross-origin" },
        { "key": "Permissions-Policy",
          "value": "camera=(), microphone=(), geolocation=(self)" },
        { "key": "Cache-Control",
          "value": "public, s-maxage=60, stale-while-revalidate=604800" }
      ]
    }
  ],
  "regions": ["fra1", "cdg1", "iad1", "sfo1", "hnd1", "syd1"]
}