import { NextResponse } from "next/server";
import type { NextRequest } from "next/server";
import { SESSION_COOKIE, verifySession, checkBasicAuth } from "@/lib/auth";

// Protect the whole console. Browsers authenticate via the login cookie;
// API clients (e.g. the iOS app) may instead send HTTP Basic Auth.
export async function middleware(req: NextRequest) {
  const { pathname } = req.nextUrl;

  // Public paths: login page + the login API.
  if (pathname === "/login" || pathname === "/api/auth/login") {
    return NextResponse.next();
  }

  const cookie = req.cookies.get(SESSION_COOKIE)?.value;
  const user = await verifySession(cookie);
  if (user) return NextResponse.next();

  if (checkBasicAuth(req.headers.get("authorization"))) {
    return NextResponse.next();
  }

  // Unauthenticated.
  if (pathname.startsWith("/api/")) {
    return NextResponse.json(
      { error: "Unauthorized" },
      { status: 401, headers: { "WWW-Authenticate": 'Basic realm="MacLustr"' } }
    );
  }

  const url = req.nextUrl.clone();
  url.pathname = "/login";
  url.searchParams.set("from", pathname);
  return NextResponse.redirect(url);
}

export const config = {
  // Run on everything except Next internals and static asset files (images/fonts).
  matcher: [
    "/((?!_next/static|_next/image|favicon.ico|robots.txt|.*\\.png$|.*\\.jpg$|.*\\.jpeg$|.*\\.svg$|.*\\.ico$|.*\\.webp$|.*\\.woff2?$).*)",
  ],
};