middleware.js

import fs from "fs";

export function checkLimit(userEmail) {
  const db = JSON.parse(fs.readFileSync("./db.json"));

  const user = db.users.find(u => u.email === userEmail);

  if (!user) return false;

  if (user.runsLeft <= 0 && user.plan === "free") {
    return { error: "Limit doldu. Pro'ya geç 🚀" };
  }

  user.runsLeft -= 1;
  fs.writeFileSync("./db.json", JSON.stringify(db, null, 2));

  return { ok: true };
}