import { describe, expect, it, vi } from 'vitest';
import { startMdnsAdvertise } from '../src/server/mdns.js';
import type { Bonjour, Service } from 'bonjour-service';

describe('mDNS advertise', () => {
  it('republishes after an IP change and stops the old service first', async () => {
    let ip = '192.168.1.10';
    const calls: string[] = [];
    const published: Array<{ txt?: Record<string, string> }> = [];

    const createBonjour = () =>
      ({
        publish(opts: { txt?: Record<string, string> }) {
          calls.push(`publish:${opts.txt?.address ?? ''}`);
          published.push(opts);
          return {
            on: vi.fn(),
            stop: vi.fn(() => calls.push('stop')),
          } as unknown as Service;
        },
        destroy: vi.fn(() => calls.push('destroy')),
      }) as unknown as Bonjour;

    const handle = startMdnsAdvertise({
      port: 3377,
      pollMs: 25,
      getIp: () => ip,
      createBonjour,
    });

    expect(handle).toBeDefined();
    expect(published[0]?.txt?.address).toBe('192.168.1.10');

    ip = '192.168.1.44';
    await new Promise((resolve) => setTimeout(resolve, 70));

    expect(published).toHaveLength(2);
    expect(published[1]?.txt?.address).toBe('192.168.1.44');
    expect(calls).toEqual(['publish:192.168.1.10', 'stop', 'destroy', 'publish:192.168.1.44']);

    handle?.stop();
  });
});