import { describe, expect, it } from 'vitest';
import { parseFeed } from './rss.feed.js';

const RSS2 = `<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
  <channel>
    <title>Some Feed</title>
    <item>
      <title>First headline</title>
      <link>https://example.com/first</link>
    </item>
    <item>
      <title><![CDATA[Second: with CDATA]]></title>
      <description>ignored</description>
    </item>
    <item>
      <title></title>
      <link>https://example.com/empty-title</link>
    </item>
  </channel>
</rss>`;

const ATOM = `<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <title>An Atom feed</title>
  <entry>
    <title>Only entry</title>
    <link rel="alternate" href="https://example.com/atom"/>
  </entry>
</feed>`;

describe('parseFeed', () => {
  it('parses RSS 2.0 items in document order, keeping links where present and skipping empty titles', () => {
    expect(parseFeed(RSS2)).toEqual([
      { title: 'First headline', link: 'https://example.com/first' },
      { title: 'Second: with CDATA' },
    ]);
  });

  it('parses Atom entries (single entry object, link as href attribute)', () => {
    expect(parseFeed(ATOM)).toEqual([
      { title: 'Only entry', link: 'https://example.com/atom' },
    ]);
  });

  it('returns [] for malformed XML', () => {
    expect(parseFeed('this is not xml at all')).toEqual([]);
    expect(parseFeed('<rss><channel><item><title>broken')).toEqual([]);
  });

  it('returns [] when there are no items or none with a usable title', () => {
    expect(
      parseFeed('<rss version="2.0"><channel><title>x</title></channel></rss>'),
    ).toEqual([]);
    expect(
      parseFeed('<feed xmlns="http://www.w3.org/2005/Atom"></feed>'),
    ).toEqual([]);
    expect(
      parseFeed(
        '<rss version="2.0"><channel><item><title>   </title></item></channel></rss>',
      ),
    ).toEqual([]);
  });
});