import { afterEach, beforeEach, describe, expect, it } from 'vitest'
import { enableAutoUnmount, flushPromises } from '@vue/test-utils'
import FormView from '../../src/views/FormView.vue'
import { recordCrumb } from '../../src/state/useBreadcrumbs'
import { toasts } from '../../src/state/useToasts'
import { clone, formSchemaFixture, recordFixture } from '../fixtures/typed'
import { API, mountApp, requestsTo, resetState, type Route } from '../helpers'

const BASE = `${API}/acme/demo/widgets`
const RECORD = `${BASE}/1`
const failure = (status: number, message: string) => ({ status, body: { error: { code: 'x', message, details: {} } } })

function routes(overrides: Record<string, Route> = {}): Record<string, Route> {
  return {
    [`GET ${BASE}/schema/form`]: { body: formSchemaFixture },
    [`GET ${RECORD}`]: { body: recordFixture },
    ...overrides,
  }
}

/** A form schema of plain, untabbed fields. */
function flatSchema() {
  const envelope = clone(formSchemaFixture)
  envelope.data.fields = envelope.data.fields.filter((field) => ['name', 'code', 'weight'].includes(field.name))
  return { body: envelope }
}

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

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

enableAutoUnmount(afterEach)

describe('form view', () => {
  it('is the component of the record and create routes', async () => {
    const { wrapper } = await mountApp('/acme/demo/widgets/1', routes())
    expect(wrapper.findComponent(FormView).exists()).toBe(true)
  })

  it('titles a record by its first text field, with the update message as subtitle, and publishes the crumb', async () => {
    const { wrapper } = await mountApp('/acme/demo/widgets/1', routes())
    expect(wrapper.find('h1').text()).toBe('Blue widget')
    expect(wrapper.find('header p').text()).toBe('Editing widget')
    expect(recordCrumb.value).toBe('Blue widget')
    wrapper.unmount()
    expect(recordCrumb.value).toBe('')
  })

  it('titles a new record by the create message and offers no delete', async () => {
    const { wrapper } = await mountApp('/acme/demo/widgets/create', routes())
    expect(wrapper.find('h1').text()).toBe('New widget')
    expect(wrapper.find('header p').exists()).toBe(false)
    expect(wrapper.find('[data-action="delete"]').exists()).toBe(false)
    expect(recordCrumb.value).toBe('New widget')
  })

  it('makes the form the tab panel of the active tab', async () => {
    const { wrapper } = await mountApp('/acme/demo/widgets/1', routes())
    const form = wrapper.find('form')
    expect(form.attributes('role')).toBe('tabpanel')
    expect(form.attributes('id')).toBe('field-panel-0')
    expect(form.attributes('aria-labelledby')).toBe('field-tab-0')
    expect(wrapper.find('#field-tab-0').attributes('aria-controls')).toBe('field-panel-0')
  })

  it('has no tabs and no tab panel role for an untabbed form', async () => {
    const { wrapper } = await mountApp('/acme/demo/widgets/1', routes({ [`GET ${BASE}/schema/form`]: flatSchema() }))
    expect(wrapper.find('[role="tablist"]').exists()).toBe(false)
    expect(wrapper.find('form').attributes('role')).toBeUndefined()
    expect(wrapper.findAll('[data-field]').map((field) => field.attributes('data-field'))).toEqual(['name', 'code', 'weight'])
  })

  it.each([
    ['the record', { [`GET ${RECORD}`]: failure(404, 'Not found') }],
    ['the schema', { [`GET ${BASE}/schema/form`]: failure(500, 'Boom') }],
  ])('announces a failed load of %s and disables saving', async (_label, override) => {
    const { wrapper } = await mountApp('/acme/demo/widgets/1', routes(override))
    expect(wrapper.find('[role="alert"]').text()).toBe('Nie udało się wczytać formularza.')
    expect(wrapper.find('form').exists()).toBe(false)
    if (_label === 'the schema') {
      expect(wrapper.find('[data-action="save"]').attributes('disabled')).toBeDefined()
    }
  })

  it('toasts the generic error when the save cannot reach the server and re-enables saving', async () => {
    const { wrapper, calls } = await mountApp(
      '/acme/demo/widgets/1',
      routes({
        [`PUT ${RECORD}`]: () => {
          throw new TypeError('offline')
        },
      }),
    )
    await wrapper.find('[data-action="save"]').trigger('click')
    await flushPromises()
    expect(requestsTo(calls, 'PUT', RECORD)).toHaveLength(1)
    expect(toasts.value[0]).toMatchObject({ text: 'Nie udało się zapisać zmian. Spróbuj ponownie.', tone: 'danger' })
    expect(wrapper.find('[data-action="save"]').attributes('disabled')).toBeUndefined()
    expect(wrapper.find('[data-action="save"]').text()).toBe('Zapisz')
  })

  it('toasts the server message when a delete is refused and stays on the record', async () => {
    const { wrapper, router } = await mountApp(
      '/acme/demo/widgets/1',
      routes({ [`DELETE ${RECORD}`]: failure(409, 'Widget is in use') }),
      { attach: true },
    )
    await wrapper.find('[data-action="delete"]').trigger('click')
    await flushPromises()
    ;(document.body.querySelector('[data-confirm-dialog] [data-action="confirm"]') as HTMLElement).click()
    await flushPromises()
    expect(toasts.value[0]).toMatchObject({ text: 'Widget is in use', tone: 'danger' })
    expect(router.currentRoute.value.fullPath).toBe('/acme/demo/widgets/1')
  })

  it('keeps a create on the form when the save fails', async () => {
    const { wrapper, router } = await mountApp(
      '/acme/demo/widgets/create',
      routes({ [`POST ${BASE}`]: failure(500, 'Boom') }),
    )
    await wrapper.find('#field-name').setValue('New one')
    await wrapper.find('[data-action="save"]').trigger('click')
    await flushPromises()
    expect(router.currentRoute.value.fullPath).toBe('/acme/demo/widgets/create')
    expect(toasts.value[0]).toMatchObject({ text: 'Boom', tone: 'danger' })
  })

  it('follows the default redirect when the form declares no create redirect', async () => {
    const envelope = clone(formSchemaFixture)
    envelope.data.redirects.create.redirect = ''
    envelope.data.redirects.default = 'acme/demo/widgets/update/:id'
    const { wrapper, router } = await mountApp(
      '/acme/demo/widgets/create',
      routes({
        [`GET ${BASE}/schema/form`]: { body: envelope },
        [`POST ${BASE}`]: { status: 201, body: { data: { id: 5, name: 'X' }, meta: { labels: {} } } },
        [`GET ${BASE}/5`]: { body: { data: { id: 5, name: 'X' }, meta: { labels: {} } } },
      }),
    )
    await wrapper.find('#field-name').setValue('X')
    await wrapper.find('[data-action="save"]').trigger('click')
    await flushPromises()
    expect(router.currentRoute.value.fullPath).toBe('/acme/demo/widgets/5')
  })
})