import { NextRequest, NextResponse } from "next/server";
import { jwtVerify } from "jose";
import { SESSION_COOKIE } from "./lib/session";

function getSecret(): Uint8Array {
  const secret = process.env.SESSION_SECRET;
  if (!secret) return new TextEncoder().encode("dev-insecure-secret");
  return new TextEncoder().encode(secret);
}

export async function proxy(req: NextRequest) {
  const { pathname } = req.nextUrl;

  // Skip auth for login page and auth API routes
  if (pathname.startsWith("/login") || pathname.startsWith("/api/auth")) {
    return NextResponse.next();
  }

  const token = req.cookies.get(SESSION_COOKIE)?.value;
  if (token) {
    try {
      await jwtVerify(token, getSecret());
      return NextResponse.next();
    } catch {
      // Token invalid or expired
    }
  }

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

export const config = {
  matcher: [
    "/((?!_next/static|_next/image|favicon\\.ico|logo\\.png|.*\\.svg).*)",
  ],
};