import { afterEach, describe, expect, it } from 'vitest'
import { mediaFileName, slugFileStem } from '../../assets/src/blogeditor/imageform'
import { isExternalUrl } from '../../assets/src/blogeditor/linkform'
import { button, chooseImage, click, fill, form, mount } from './helpers'

// J3 link form and J4 image form (UI-SPEC J3, J4): the rel checkboxes
// follow the URL as it is typed, the generic-text warning comes and goes
// without blocking, the file-name slug rule's examples, and a decorative
// image clears and locks its alt. The first cases are in additions.test.ts.

afterEach(() => {
  document.body.replaceChildren()
})

const ON = JSON.stringify({ headingLevels: [2, 3, 4], genericAnchors: ['click here', 'czytaj więcej'] })

function openLink(text: string) {
  const m = mount(`<p>${text}</p>`, { options: ON })
  m.editor.commands.setTextSelection({ from: 1, to: 1 + text.length })
  click(button(m.el, 'link'))
  const linkForm = form(m.el, 'link')!
  const box = (token: string) => linkForm.querySelector<HTMLInputElement>(`input[name="rel-${token}"]`)!
  return { ...m, linkForm, box, url: linkForm.querySelector<HTMLInputElement>('input[name="url"]')! }
}

describe('J3 rel checkboxes', () => {
  it('enable for an absolute http(s) URL and disable again for an internal one', () => {
    const { box, url } = openLink('Partner')
    for (const token of ['nofollow', 'sponsored', 'ugc']) expect(box(token).disabled, token).toBe(true)
    fill(url, 'https://partner.test')
    for (const token of ['nofollow', 'sponsored', 'ugc']) expect(box(token).disabled, token).toBe(false)
    box('ugc').checked = true
    fill(url, '/blog/partner')
    expect(box('ugc').disabled).toBe(true)
  })

  it('writes only the checked tokens, in order, for an external link', () => {
    const { el, box, url, linkForm } = openLink('Partner')
    fill(url, 'https://partner.test/x')
    box('ugc').checked = true
    box('nofollow').checked = true
    click(linkForm.querySelector('[data-action="apply"]'))
    expect(el.value).toMatch(/^<p><a rel="nofollow ugc" href="https:\/\/partner\.test\/x">Partner<\/a><\/p>$/)
  })

  it('writes no rel for an internal link even when a box was checked', () => {
    const { el, box, url, linkForm } = openLink('Partner')
    fill(url, 'https://partner.test')
    box('sponsored').checked = true
    fill(url, '/oferta')
    click(linkForm.querySelector('[data-action="apply"]'))
    expect(el.value).toBe('<p><a href="/oferta">Partner</a></p>')
  })
})

describe('J3 generic link text', () => {
  it('warns for a listed text in any case or punctuation and stays quiet otherwise', () => {
    const generic = openLink('Czytaj więcej…')
    expect(generic.linkForm.querySelector<HTMLElement>('[data-warning]')!.hidden).toBe(false)
    fill(generic.url, '/blog/a')
    click(generic.linkForm.querySelector('[data-action="apply"]'))
    expect(generic.el.value).toBe('<p><a href="/blog/a">Czytaj więcej…</a></p>')
    document.body.replaceChildren()
    const specific = openLink('Badania nad chagą')
    expect(specific.linkForm.querySelector<HTMLElement>('[data-warning]')!.hidden).toBe(true)
  })

  it('reads external URLs by scheme only', () => {
    for (const [u, want] of [
      ['https://a.test/x?y=1', true],
      ['http://a.test', true],
      ['/kontakt', false],
      ['./a', false],
      ['ftp://a.test', false],
      ['javascript:alert(1)', false],
      ['', false],
    ] as const) {
      expect(isExternalUrl(u), u).toBe(want)
    }
  })
})

describe('J4 file names', () => {
  it('follows the slug rule examples', () => {
    for (const [name, want] of [
      ['Chaga – zdjęcie 1.JPEG', 'chaga-zdjecie-1.jpeg'],
      ['  Kurki   w  koszyku .png', 'kurki-w-koszyku.png'],
      ['IMG_2024.06.01.webp', 'img-2024-06-01.webp'],
      ['___.gif', 'image.gif'],
      ['bez-rozszerzenia', 'bez-rozszerzenia'],
    ] as const) {
      expect(mediaFileName(name), name).toBe(want)
    }
    expect(slugFileStem('Łódź & Kraków')).toBe('lodz-krakow')
    expect(slugFileStem('--a--b--')).toBe('a-b')
  })

  it('clears and locks the alt of a decorative image and frees it again', () => {
    const { el } = mount('', { options: ON })
    const input = el.querySelector<HTMLInputElement>('input[type="file"]')!
    Object.defineProperty(input, 'files', { value: [new File([new Uint8Array([137, 80, 78, 71])], 'linia.png', { type: 'image/png' })], configurable: true })
    input.dispatchEvent(new Event('change'))
    const imageForm = form(el, 'image')!
    const alt = imageForm.querySelector<HTMLInputElement>('input[name="alt"]')!
    const decorative = imageForm.querySelector<HTMLInputElement>('input[name="decorative"]')!
    fill(alt, 'Linia')
    decorative.checked = true
    decorative.dispatchEvent(new Event('change'))
    expect(alt.value).toBe('')
    expect(alt.disabled).toBe(true)
    decorative.checked = false
    decorative.dispatchEvent(new Event('change'))
    expect(alt.disabled).toBe(false)
    chooseImage(el, { alt: 'Linia' })
  })
})