/**
 * @module middleware
 * @description hooks-up `next-auth` into the page processing pipeline
 */

import { auth, authConfig } from '@/app/lib/auth'
import createIntlMiddleware from 'next-intl/middleware';
import { NextRequest, NextResponse } from 'next/server';
import { locales, defaultLocale } from '@/app/i18n';

const publicPages = ['/terms', '/policy', '/login'];
 
const intlMiddleware = createIntlMiddleware({
  locales,
  localePrefix: 'as-needed',
  defaultLocale
});

export default async function middleware(req: NextRequest) {
  const publicPathnameRegex = RegExp(
    `^(/(${locales.join('|')}))?(${publicPages
      .flatMap((p) => (p === '/' ? ['', '/'] : p))
      .join('|')})/?$`,
    'i'
  );
  const isPublicPage = publicPathnameRegex.test(req.nextUrl.pathname);

  // for public pages we call only localisation middleware
  // this is not an official way to do it - it's a hack
  // based on https://github.com/nextauthjs/next-auth/discussions/8961
  // The official way of chaining middlewares in AuthJS v5 does not work and is not fully documented
  if (!isPublicPage) {
    const session = await auth();

    if (!session) {
      const signInUrl = `${req.nextUrl.protocol}//${req.nextUrl.hostname}${req.nextUrl.port ? `:${req.nextUrl.port}` : ''}${authConfig.pages?.signIn as string}`;
      return NextResponse.redirect( signInUrl  );
    }
  }

  return intlMiddleware(req);
}

export const config = {
  // for these paths middleware will not be called
  matcher: [
    '/((?!api|_next/static|_next/image|.*\\.png$|.*\\.webm$).*)',
  ],
};