import type { NextConfig } from "next";

function getR2PublicUrl(): URL | null {
  const publicUrl = process.env.NEXT_PUBLIC_R2_PUBLIC_URL?.trim();

  if (!publicUrl) {
    return null;
  }

  try {
    const url = new URL(publicUrl);

    if (url.protocol !== "https:" && url.protocol !== "http:") {
      return null;
    }

    return url;
  } catch {
    return null;
  }
}

const r2PublicUrl = getR2PublicUrl();

const nextConfig: NextConfig = {
  images: {
    remotePatterns: r2PublicUrl
      ? [
          {
            protocol: r2PublicUrl.protocol.replace(":", "") as "http" | "https",
            hostname: r2PublicUrl.hostname,
            port: r2PublicUrl.port,
            pathname: "/**",
          },
        ]
      : [],
    unoptimized: Boolean(r2PublicUrl),
  },
};

export default nextConfig;