import assert from "node:assert/strict";
import { mkdtempSync } from "node:fs";
import { readFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { test } from "node:test";

import { TokenStore } from "../src/tokens.ts";

test("pairing code round-trip mints a working device token", async () => {
  const dir = mkdtempSync(join(tmpdir(), "tokens-"));
  const store = new TokenStore(dir, 60_000);

  const pairing = store.issuePairingCode("michal");
  assert.match(pairing.code, /^[0-9a-f]{64}$/);

  const redeemed = store.redeemPairingCode(pairing.code);
  assert.ok(redeemed);
  assert.equal(redeemed.username, "michal");

  // Single use.
  assert.equal(store.redeemPairingCode(pairing.code), undefined);

  // The token authenticates, wrong tokens do not.
  assert.equal(store.authenticate(redeemed.token), "michal");
  assert.equal(store.authenticate("not-a-token"), undefined);

  // Nothing on disk contains the plaintext token.
  const persisted = await readFile(join(dir, "devices.json"), "utf8");
  assert.ok(!persisted.includes(redeemed.token));

  // A fresh store reads the same devices back.
  const reloaded = new TokenStore(dir, 60_000);
  assert.equal(reloaded.authenticate(redeemed.token), "michal");
});

test("expired pairing codes are refused", () => {
  const dir = mkdtempSync(join(tmpdir(), "tokens-"));
  const store = new TokenStore(dir, -1); // already expired at issue time
  const pairing = store.issuePairingCode("michal");
  assert.equal(store.redeemPairingCode(pairing.code), undefined);
});