/**
 * 从 Cookie 读取邮箱（不调用 PB），用于 emailLinked=1 但 userName 被覆盖的场景
 */
import { NextRequest, NextResponse } from "next/server";
import { COOKIE_NAME } from "@/app/lib/auth-cookie";

export async function GET(request: NextRequest) {
  const cookie = request.cookies.get(COOKIE_NAME)?.value;
  if (!cookie) {
    return NextResponse.json({ ok: true, email: null });
  }
  try {
    const payload = JSON.parse(Buffer.from(cookie, "base64url").toString("utf-8"));
    const email = payload?.email ?? null;
    return NextResponse.json({ ok: true, email: typeof email === "string" ? email : null });
  } catch {
    return NextResponse.json({ ok: true, email: null });
  }
}