import { assertEquals } from "@std/assert";
import { ntpPacket, NTP_MODE, NTP_PACKET_SIZE } from "@binstruct/ntp";

const coder = ntpPacket();
const packet = {
  leapVersionMode: { leapIndicator: 0, version: 4, mode: NTP_MODE.CLIENT },
  stratum: 0,
  poll: 4,
  precision: -20,
  rootDelay: 0,
  rootDispersion: 0,
  referenceId: 0,
  referenceTimestamp: 0n,
  originTimestamp: 0n,
  receiveTimestamp: 0n,
  transmitTimestamp: 0xe4c5c46700000000n,
};

const buffer = new Uint8Array(NTP_PACKET_SIZE);
const written = coder.encode(packet, buffer);
const [decoded, read] = coder.decode(buffer);

assertEquals(written, NTP_PACKET_SIZE);
assertEquals(read, NTP_PACKET_SIZE);
assertEquals(decoded, packet);
assertEquals(decoded.leapVersionMode.mode, NTP_MODE.CLIENT);