middleware.ts

import { rewrite, next } from "@vercel/edge";
import builtInApiPaths from "./built-in-api-paths";

const dest = process.env.DEST;
const hosts = (process.env.HOSTS ?? "clubs.place")
	.split(",")
	.map((x) => x.trim())
	.sort((a, b) => (a.split(".").length < b.split(".").length ? 0 : -1));

// export const config = {
// 	matcher: ["/((?!assets|chunks|_vercel|[\\w-]+\\.\\w+).*)"],
// };

const redirects = [
	...hosts.map((host) => ({
		host,
		matchers: [
			"/",
			new RegExp("^/(starter|ticketing|plugins|dev-tokens|blog|post|pricing)(|/.*)$"),
		],
		destination: "https://www.clubs.place",
	})),
	{
		host: "temples.clubs.stakes.social",
		matchers: undefined,
		destination: "https://temples.clubs.place",
	},
	{
		host: "kougenji.clubs.stakes.social",
		matchers: undefined,
		destination: "https://kougenji.clubs.place",
	},
];

export default function middleware(req: Request) {
	const url = new URL(req.url);

	const matchToRedirects = redirects.find(
		({ host, matchers }) =>
			host === url.host &&
			(matchers
				? matchers.some((matcher) =>
						typeof matcher === "string"
							? matcher === url.pathname
							: matcher.test(url.pathname),
				  )
				: true),
	);

	if (matchToRedirects) {
		return Response.redirect(
			new URL(
				`${url.pathname}${url.search ? url.search : ""}`,
				matchToRedirects.destination,
			),
		);
	}

	const hostnames = url.host.split(".") ?? [];
	const [tenant] = hostnames;
	const api = url.pathname.startsWith("/api/");
	const html =
		!api &&
		(req.headers.get("accept")?.includes("text/html") ||
			url.pathname
				.split("/")
				.slice(-1)
				.every((p) => !/\..+$/.test(p)));
	const bInApi = builtInApiPaths.some((p) => url.pathname.startsWith(p));
	const pInApi = api && !bInApi;

	const primaryHost =
		hosts.find((h) => url.host === h) ??
		hosts.find((h) => url.host.endsWith(h));

	if ((html || pInApi) && primaryHost && url.host !== primaryHost && dest) {
		const destination = new URL(url.href);
		destination.pathname = `/sites_/${tenant}${url.pathname}`;
		destination.host = dest;
		console.log({ destination: destination.toString() });
		return rewrite(destination);
	}

	if (dest) {
		const destination = new URL(url.href);
		destination.host = dest;
		console.log({ destination: destination.toString() });
		return rewrite(destination);
	}

	return next();
}