import { test } from "node:test";
import assert from "node:assert/strict";
import { TcpClient } from "@seriousme/opifex/tcpClient";
import { TcpServer } from "@seriousme/opifex/tcpServer";
import { delay, logger, LogLevel } from "@seriousme/opifex/utils";
import type { PublishPacket, QoS } from "@seriousme/opifex/mqttPacket";

logger.level(LogLevel.info);

test("Test pubSub using TCP client and server using memoryPersistence", async function () {
  const server = new TcpServer({ port: 0 }, {
    // just an example on how to configure the server
    configuration: { context: { maximumConnectPacketSize: 3000 } },
  });
  server.start();

  assert.deepStrictEqual(
    server.port !== undefined,
    true,
    "server runs a a random port",
  );
  logger.info(
    `TCP server running on port: ${server.port}, address: ${server.address}`,
  );

  const params = {
    url: new URL(`mqtt://${server.address}:${server.port}`),
    numberOfRetries: 0,
  };

  const client = new TcpClient();
  await client.connect(params);
  logger.info("Client connected to server at", client.url.toString());

  const publishSet: { topic: string; qos: QoS }[] = [
    { topic: "t0@q0", qos: 0 },
    { topic: "t1@q0", qos: 0 },
    { topic: "t2@q0", qos: 0 },
    { topic: "t0@q1", qos: 1 },
    { topic: "t1@q1", qos: 1 },
    { topic: "t2@q1", qos: 1 },
    { topic: "t0@q2", qos: 2 },
    { topic: "t1@q2", qos: 2 },
    { topic: "t2@q2", qos: 2 },
  ];

  const subscriptions = publishSet.map((item) => ({
    topicFilter: item.topic,
    qos: item.qos,
  }));
  await client.subscribe({
    subscriptions,
  });

  // the IIFE ensures message reception runs in parallel
  logger.info("Start receiving");
  const received: PublishPacket[] = [];
  (async function () {
    for await (const item of client.messages()) {
      logger.verbose("Receiving:", item.topic, "--", item.qos);
      received.push(item);
    }
  })();
  // end of IIFE
  for (const item of publishSet) {
    logger.verbose("Publishing:", item.topic, "--", item.qos);
    await client.publish({
      topic: item.topic,
      qos: item.qos,
      payload: new Uint8Array([0x01]),
    });
  }

  await delay(100);
  logger.info("Disconnect client");
  await client.disconnect();

  logger.info("Check completeness");
  for (const item of publishSet) {
    const found = received.find((f) =>
      f.topic == item.topic && f.qos === item.qos
    );
    logger.verbose("Found:", item.topic, "--", item.qos);
    assert(found, `${item.topic} -- ${item.qos}`);
  }

  logger.info("Stop server");
  await server.stop();
});