import { afterEach, beforeEach, describe, expect, it } from 'vitest'
import { enableAutoUnmount, mount } from '@vue/test-utils'
import FormTabs from '../../src/components/form/FormTabs.vue'
import type { TabItem } from '../../src/components/form/formState'
import { keydown, resetState } from '../helpers'

const tabs: TabItem[] = [
  { key: 'default', label: 'Podstawowe', errors: 0 },
  { key: 'tab:Details', label: 'Details', errors: 2 },
  { key: 'tab:Members', label: 'Members', errors: 1 },
]

function mountTabs(modelValue = 'default') {
  return mount(FormTabs, { props: { tabs, modelValue, idPrefix: 'f' }, attachTo: document.body })
}

beforeEach(() => {
  resetState()
})

afterEach(() => {
  document.body.innerHTML = ''
})

enableAutoUnmount(afterEach)

describe('form tabs', () => {
  it('is a tablist of tabs with roving tabindex, aria-selected and aria-controls', () => {
    const wrapper = mountTabs('tab:Details')
    expect(wrapper.find('[role="tablist"]').exists()).toBe(true)
    const items = wrapper.findAll('[role="tab"]')
    expect(items.map((tab) => tab.attributes('aria-selected'))).toEqual(['false', 'true', 'false'])
    expect(items.map((tab) => tab.attributes('tabindex'))).toEqual(['-1', '0', '-1'])
    expect(items.map((tab) => tab.attributes('id'))).toEqual(['f-tab-0', 'f-tab-1', 'f-tab-2'])
    expect(items.map((tab) => tab.attributes('aria-controls'))).toEqual(['f-panel-0', 'f-panel-1', 'f-panel-2'])
  })

  it('badges tabs with invalid fields with a plural label', () => {
    const wrapper = mountTabs()
    const badges = wrapper.findAll('[data-tab-errors]')
    expect(badges.map((badge) => [badge.text(), badge.attributes('aria-label')])).toEqual([
      ['2', '2 błędy'],
      ['1', '1 błąd'],
    ])
  })

  it('selects on click and moves with the arrow keys, wrapping and moving focus', async () => {
    const wrapper = mountTabs()
    await wrapper.findAll('[role="tab"]')[2]!.trigger('click')
    expect(wrapper.emitted('update:modelValue')!.at(-1)).toEqual(['tab:Members'])

    const first = wrapper.findAll('[role="tab"]')[0]!.element
    expect(keydown(first, 'ArrowLeft').defaultPrevented).toBe(true)
    expect(wrapper.emitted('update:modelValue')!.at(-1)).toEqual(['tab:Members'])
    expect(document.activeElement?.id).toBe('f-tab-2')
    keydown(first, 'ArrowRight')
    expect(wrapper.emitted('update:modelValue')!.at(-1)).toEqual(['tab:Details'])
    expect(document.activeElement?.id).toBe('f-tab-1')
    expect(keydown(first, 'Enter').defaultPrevented).toBe(false)
  })
})