import { describe, it, expect } from 'vitest'
import { exportPage } from '@/lib/exporter/html'
import { pageSchema, type Page } from '@/lib/schema/page'

function makePage(): Page {
  return pageSchema.parse({
    title: 'SEO/Perf',
    locale: 'en',
    theme: { primaryColor: '#0ea5e9', fontFamily: 'Inter' },
    sections: [
      { type: 'hero', props: { heading: 'Welcome', subheading: 'Sub', imageUrl: 'https://img.example/hero.png' } },
    ],
    form: { actionUrl: '', fields: [], spamProtection: { honeypotFieldName: '_hp', minSubmitSeconds: 2 } },
    seo: { title: 'SEO', description: 'Desc' },
  })
}

describe('Exporter - small SEO/Perf improvements', () => {
  it('includes canonical link and dark mode tokens; hero image lazy/async', () => {
    const out = exportPage(makePage())
    const html = out.html
    const css = out.css

    // canonical link present in head
    expect(html).toMatch(/<link[^>]+rel="canonical"/)

    // hero image has loading/decoding attributes
    expect(html).toMatch(/<img[^>]*loading="lazy"/)
    expect(html).toMatch(/<img[^>]*decoding="async"/)

    // dark mode media query token exists
    expect(css).toMatch(/@media \(prefers-color-scheme: dark\)/)
  })
})