const fs = require("node:fs");
const path = require("node:path");
const vm = require("node:vm");

// The same calculation code used by the browser, isolated from server globals.
const engine = vm.createContext({ structuredClone });
for (const name of ["native-math.js", "native-formula.js", "native-text.js", "native-quantity.cjs"])
  vm.runInContext(fs.readFileSync(path.join(__dirname, name), "utf8"), engine, { filename: name });

function calculateQuantity(sheet) {
  engine.sheet = sheet;
  try {
    return vm.runInContext("EstQuantity.calculate(sheet)", engine, { timeout: 20000 });
  } finally {
    delete engine.sheet;
  }
}
module.exports = { calculateQuantity };