#!/usr/bin/env node
import { createPrivateKey, sign } from "crypto";
import { readFileSync } from "fs";
import { resolve, dirname } from "path";
import { fileURLToPath } from "url";

const envPath = resolve(dirname(fileURLToPath(import.meta.url)), "../.env");

let privateKeyB64 = process.env.LICENSE_PRIVATE_KEY;

if (!privateKeyB64) {
  try {
    const envContents = readFileSync(envPath, "utf8");
    const match = envContents.match(/^LICENSE_PRIVATE_KEY=(.+)$/m);
    if (match) privateKeyB64 = match[1].trim();
  } catch {}
}

if (!privateKeyB64) {
  console.error("LICENSE_PRIVATE_KEY not found in env or .env file");
  process.exit(1);
}

const window = Math.floor(Date.now() / 1000 / 300);
const msg = Buffer.from(String(window));

const privateKey = createPrivateKey({
  key: Buffer.from(privateKeyB64, "base64"),
  format: "der",
  type: "pkcs8",
});

const sig = sign(null, msg, privateKey);
const key = sig.toString("base64url");

const minutesLeft = 5 - (Math.floor(Date.now() / 1000) % 300) / 60;

console.log(`\nLicense key (valid for ~${minutesLeft.toFixed(1)} more minutes):\n`);
console.log(key);
console.log();