import { describe, expect, it } from 'vitest';

import type { PublicPage } from './api.types';
import { byPublication, isBlogPost } from './blog';
import { buildFeed } from './rss';

const post = (id: number, title: string, published_at: string, slug = 'blog') =>
  ({
    id,
    title,
    path: `/${title.toLowerCase().replace(/\s/g, '-')}`,
    excerpt: 'Resumen con <etiquetas> & símbolos',
    published_at,
    category: { id: 9, slug, name: 'Blog' },
  }) as unknown as PublicPage;

describe('blog', () => {
  it("knows a post by its category, in the visitor's language", () => {
    expect(isBlogPost(post(1, 'Hola', '2026-01-01'), 'es')).toBe(true);
    expect(isBlogPost(post(2, 'Sobre', '2026-01-01', 'colectivo'), 'es')).toBe(
      false,
    );
  });

  it('orders posts newest first', () => {
    const ordered = byPublication([
      post(1, 'Viejo', '2026-01-01'),
      post(2, 'Nuevo', '2026-09-01'),
    ]);

    expect(ordered.map((p) => p.title)).toEqual(['Nuevo', 'Viejo']);
  });
});

describe('buildFeed', () => {
  const xml = buildFeed(
    'https://pireon.dev',
    'es',
    { title: 'Pireon — Blog', description: 'Novedades', link: '/blog' },
    [post(1, 'Primer post', '2026-09-01T10:00:00Z')],
  );

  it('links every item absolutely, with its date', () => {
    expect(xml).toContain('<link>https://pireon.dev/primer-post</link>');
    expect(xml).toContain('<pubDate>Tue, 01 Sep 2026 10:00:00 GMT</pubDate>');
  });

  it('escapes what it carries and parses as XML', () => {
    expect(xml).toContain('&lt;etiquetas&gt; &amp; símbolos');
    expect(
      new DOMParser()
        .parseFromString(xml, 'application/xml')
        .getElementsByTagName('parsererror'),
    ).toHaveLength(0);
  });
});