middleware.ts

import { jwtVerify } from "jose";
import { NextRequest, NextResponse } from "next/server";

const PUBLIC_PATHS = ["/login", "/api/auth/login", "/api/auth/logout"];

function getSecret() {
  const jwt = process.env.JWT_SECRET;
  if (!jwt) throw new Error("JWT_SECRET environment variable is required");
  return new TextEncoder().encode(jwt);
}

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

  if (
    PUBLIC_PATHS.some((p) => pathname.startsWith(p)) ||
    pathname.startsWith("/_next") ||
    pathname.startsWith("/favicon")
  ) {
    return NextResponse.next();
  }

  const token = req.cookies.get("dentai-session")?.value;

  if (!token) {
    if (pathname.startsWith("/api/")) {
      return NextResponse.json({ error: "No autenticado" }, { status: 401 });
    }
    return NextResponse.redirect(new URL("/login", req.url));
  }

  try {
    await jwtVerify(token, getSecret());
    return NextResponse.next();
  } catch {
    if (pathname.startsWith("/api/")) {
      return NextResponse.json({ error: "Sesion expirada" }, { status: 401 });
    }
    return NextResponse.redirect(new URL("/login", req.url));
  }
}

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