import test from "node:test";
import assert from "node:assert/strict";
import { register, activateUpdate } from "../js/client.mjs";

test("unsupported browsers retain the ordinary web app", async () => {
  assert.equal(await register(), null);
});

test("waiting updates are announced without activating or reloading", async () => {
  const previous = Object.getOwnPropertyDescriptor(globalThis, "navigator");
  const events = {};
  const messages = [];
  const waiting = { postMessage: (message) => messages.push(message) };
  const registration = { waiting, addEventListener: (name, fn) => { events[name] = fn; } };
  Object.defineProperty(globalThis, "navigator", { configurable: true, value: {
    serviceWorker: { register: async (url, options) => {
      assert.equal(url, "/app/sw.js");
      assert.equal(options.updateViaCache, "none");
      return registration;
    } },
  } });
  try {
    let updates = 0;
    assert.equal(await register({ url: "/app/sw.js", onUpdate: () => { updates++; } }), registration);
    assert.equal(updates, 1);
    events.updatefound();
    assert.equal(updates, 1, "do not announce the same waiting worker twice");
    assert.equal(messages.length, 0);
    assert.equal(activateUpdate(registration), true);
    assert.deepEqual(messages, [{ type: "rastrillo:pwa:activate" }]);
    registration.waiting = null;
    assert.equal(activateUpdate(registration), false);
  } finally {
    Object.defineProperty(globalThis, "navigator", previous);
  }
});