import { test, expect } from '@playwright/test'

type WindowWithExport = Window & {
  __exportPreview?: () => { html: string; css: string; js: string }
}

const builderUrl = '/en/builder'

// Verify tab order after activating the skip-link: focus should move into <main>
// Then the first Tab should reach a focusable descendant (e.g., form submit button)
test('Skip-link Enter moves focus into main; next Tab reaches first focusable', async ({ page, context }) => {
  await page.goto(builderUrl)
  await page.getByTestId('card-hero').click()

  await page.waitForFunction(() => Boolean((window as unknown as WindowWithExport).__exportPreview), { timeout: 5000 })
  const exported = await page.evaluate(() => (window as unknown as WindowWithExport).__exportPreview?.() ?? null)
  expect(exported).not.toBeNull()

  const preview = await context.newPage()
  await preview.setContent(exported!.html)
  await preview.addStyleTag({ content: exported!.css })

  const skip = preview.locator('a.skip-link')
  await expect(skip).toHaveCount(1)
  await skip.focus()
  await expect(skip).toBeFocused()

  // Activate skip-link
  await preview.keyboard.press('Enter')

  // Focus should be inside #main or on #main
  const focusedInMain = await preview.evaluate(() => {
    const main = document.getElementById('main')!
    const active = document.activeElement as HTMLElement | null
    if (!active) return false
    return active === main || main.contains(active)
  })
  expect(focusedInMain).toBeTruthy()

  // Press Tab and expect a focusable inside main (submit button) to receive focus
  await preview.keyboard.press('Tab')
  const isSubmitFocused = await preview.evaluate(() => {
    const active = document.activeElement as HTMLElement | null
    return !!active && active.tagName.toLowerCase() === 'button' && (active as HTMLButtonElement).type === 'submit'
  })
  expect(isSubmitFocused).toBeTruthy()

  await preview.close()
})