import type { NextConfig } from "next";

function normalizeBasePath(raw: string | undefined): string {
  const trimmed = (raw ?? "").trim();
  if (!trimmed || trimmed === "/") return "";
  const withLeadingSlash = trimmed.startsWith("/") ? trimmed : `/${trimmed}`;
  return withLeadingSlash.replace(/\/+$/, "");
}

const basePath = normalizeBasePath(process.env.NEXT_PUBLIC_BASE_PATH);
const internalApiUrl = (process.env.INTERNAL_API_URL ?? "")
  .trim()
  .replace(/\/+$/, "");

const nextConfig: NextConfig = {
  // In dev, Next may proxy requests based on the request origin/host.
  // Allow common local origins so `next dev --hostname 127.0.0.1` works
  // when users access via http://localhost:3000 or http://127.0.0.1:3000.
  // Keep the LAN IP as well for dev on the local network.
  allowedDevOrigins: ["192.168.1.101", "localhost", "127.0.0.1"],
  ...(basePath ? { basePath } : {}),
  images: {
    remotePatterns: [
      {
        protocol: "https",
        hostname: "img.clerk.com",
      },
    ],
  },
  async headers() {
    return [
      {
        source: "/((?!_next/static|_next/image|favicon.ico).*)",
        headers: [
          {
            key: "Cache-Control",
            value: "no-store, no-cache, must-revalidate, max-age=0",
          },
        ],
      },
    ];
  },
  async rewrites() {
    if (!internalApiUrl) return [];
    return [
      {
        source: "/healthz",
        destination: `${internalApiUrl}/healthz`,
      },
      {
        source: "/readyz",
        destination: `${internalApiUrl}/readyz`,
      },
      {
        source: "/openapi.json",
        destination: `${internalApiUrl}/openapi.json`,
      },
    ];
  },
};

export default nextConfig;