import { NextResponse, type NextRequest } from 'next/server';
import createIntlMiddleware from 'next-intl/middleware';
import { routing } from '@/i18n/routing';

const intlMiddleware = createIntlMiddleware(routing);

const publicPaths = ['/login', '/register', '/search', '/auth/callback'];
const publicExactPaths = ['/'];
const authOnlyPaths = ['/login', '/register'];

function isPublicPath(pathname: string): boolean {
  return (
    publicExactPaths.includes(pathname) ||
    publicPaths.some((path) => pathname.startsWith(path))
  );
}

function stripLocale(pathname: string): string {
  const localePattern = /^\/(vi|en)(\/|$)/;
  return pathname.replace(localePattern, '/') || '/';
}

export function middleware(request: NextRequest) {
  const { pathname } = request.nextUrl;
  const strippedPath = stripLocale(pathname);

  const hasAuthCookie = request.cookies.has('goodgo_authenticated');

  if (!isPublicPath(strippedPath) && !hasAuthCookie) {
    const loginUrl = new URL('/login', request.url);
    loginUrl.searchParams.set('redirect', strippedPath);
    return NextResponse.redirect(loginUrl);
  }

  const isAuthOnly = authOnlyPaths.some((path) =>
    strippedPath.startsWith(path),
  );
  if (isAuthOnly && hasAuthCookie) {
    return NextResponse.redirect(new URL('/dashboard', request.url));
  }

  return intlMiddleware(request);
}

export const config = {
  matcher: ['/((?!api|_next/static|_next/image|favicon.ico|public).*)'],
};