import { describe, it, expect } from 'vitest';
import { alternates, buildJsonLd, absUrl, ogImagePath } from '@lib/seo';
import { PAGE_IDS } from '@i18n/slugMap';

const ORIGIN = 'https://cesnimda.co.uk/';

describe('SEO builders (SEO_SPEC §2–4)', () => {
  it('alternates include en, nb and x-default for every page', () => {
    for (const id of PAGE_IDS) {
      const alts = alternates(id, ORIGIN);
      const langs = alts.map((a) => a.hreflang);
      expect(langs).toContain('en');
      expect(langs).toContain('nb');
      expect(langs).toContain('x-default');
      for (const a of alts) expect(a.href.startsWith('https://')).toBe(true);
    }
  });

  it('x-default points at the English URL', () => {
    const alts = alternates('projects', ORIGIN);
    const xd = alts.find((a) => a.hreflang === 'x-default');
    const en = alts.find((a) => a.hreflang === 'en');
    expect(xd?.href).toBe(en?.href);
  });

  it('home JSON-LD is a valid Person graph', () => {
    const graph = buildJsonLd('home', 'en', ORIGIN);
    const person = graph.find((g) => (g as { '@type': string })['@type'] === 'Person') as Record<
      string,
      unknown
    >;
    expect(person).toBeTruthy();
    expect(person.name).toBe('Connor Babbington');
    expect(person.jobTitle).toBe('Systems Developer');
    expect(() => JSON.stringify(graph)).not.toThrow();
  });

  it('Norwegian home uses the localised job title', () => {
    const graph = buildJsonLd('home', 'no', ORIGIN);
    const person = graph.find((g) => (g as { '@type': string })['@type'] === 'Person') as Record<
      string,
      unknown
    >;
    expect(person.jobTitle).toBe('Systemutvikler');
  });

  it('case-study JSON-LD carries the project name and author', () => {
    const graph = buildJsonLd('jobtrack', 'en', ORIGIN, {
      projectName: 'JobTrack',
      projectType: 'SoftwareApplication',
    });
    const work = graph[0] as Record<string, unknown>;
    expect(work['@type']).toBe('SoftwareApplication');
    expect(work.name).toBe('JobTrack');
    expect((work.author as Record<string, unknown>)['@type']).toBe('Person');
  });

  it('helpers build absolute URLs and OG paths', () => {
    expect(absUrl('/projects/', ORIGIN)).toBe('https://cesnimda.co.uk/projects/');
    expect(ogImagePath('home', 'no')).toBe('/og/home-no.png');
  });
});