import type { MiddlewareHandler } from "hono";

export const canonicalizeTrailingSlash: MiddlewareHandler = async (context, next) => {
  const path = context.req.path;
  const method = context.req.method;

  if ((method === "GET" || method === "HEAD") && path !== "/" && path.endsWith("/")) {
    const { search } = new URL(context.req.url);
    return context.redirect(`${path.slice(0, -1)}${search}`, 301);
  }

  await next();
};