import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import { enableAutoUnmount, flushPromises, type VueWrapper } from '@vue/test-utils'
import { setSettings } from '../../src/state/useSettings'
import { toasts } from '../../src/state/useToasts'
import { clone, companionsFormSchemaFixture, listFixture, listSchemaFixture } from '../fixtures/typed'
import { API, keydown, mountApp, requestsTo, resetState, wait, type Reply, type Route } from '../helpers'

// Phase 17 plan 02 smoke specs for the tree reorder page (D-09), the list's
// Reorder button and the singleton form (D-11). Plan 06 completes them.
const BASE = `${API}/acme/companions/links`
const REORDER = `${BASE}/reorder`

function tree(): Reply {
  return {
    body: {
      data: {
        title: 'Reorder links',
        partition: {
          label: 'Group',
          value: 5,
          options: [
            { value: 5, label: 'Main' },
            { value: 6, label: 'Footer' },
          ],
        },
        nodes: [
          { id: 1, name: 'Home', parent_id: null, sort_order: 1 },
          { id: 2, name: 'Blog', parent_id: null, sort_order: 2 },
          { id: 3, name: 'News', parent_id: 2, sort_order: 3 },
          { id: 4, name: '', parent_id: null, sort_order: 4 },
        ],
      },
      meta: {},
    },
  }
}

/** The tree as "name(children)" strings, in display order. */
function shape(wrapper: VueWrapper): string {
  const read = (list: Element): string =>
    Array.from(list.children)
      .map((item) => {
        const name = item.querySelector(':scope > [data-reorder-node] > span.min-w-0')?.textContent?.trim() ?? '?'
        const children = item.querySelector(':scope > ul')
        return children ? `${name}(${read(children)})` : name
      })
      .join(' ')
  return read(wrapper.find('[data-reorder-tree]').element)
}

const handle = (wrapper: VueWrapper, id: number) => wrapper.find(`[data-reorder-handle="${id}"]`)

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

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

enableAutoUnmount(afterEach)

describe('ReorderView', () => {
  it('ReorderView tracer: a keyboard move sends one debounced POST with the full node set', async () => {
    let body: unknown = null
    const { wrapper, calls } = await mountApp(
      '/acme/companions/links/reorder',
      {
        [`GET ${REORDER}`]: tree(),
        [`POST ${REORDER}`]: async (request) => {
          body = await request.json()
          return tree()
        },
      },
      { attach: true },
    )
    expect(wrapper.find('h1').text()).toBe('Reorder links')
    expect(wrapper.find('[data-reorder-tree]').attributes('aria-label')).toBe('Kolejność rekordów')
    expect(shape(wrapper)).toBe('Home Blog(News) Bez tytułu (#4)')
    expect(wrapper.find<HTMLSelectElement>('[data-reorder-partition]').element.value).toBe('5')
    // First row: up, indent and outdent are impossible.
    const first = wrapper.find('[data-reorder-node="1"]')
    expect(first.find('[data-action="reorder-up"]').attributes('disabled')).toBeDefined()
    expect(first.find('[data-action="reorder-indent"]').attributes('disabled')).toBeDefined()
    expect(first.find('[data-action="reorder-outdent"]').attributes('disabled')).toBeDefined()

    // Three quick moves by keyboard on the handles.
    keydown(handle(wrapper, 1).element, 'ArrowDown')
    await flushPromises()
    expect(shape(wrapper)).toBe('Blog(News) Home Bez tytułu (#4)')
    expect(document.activeElement).toBe(handle(wrapper, 1).element)
    keydown(handle(wrapper, 1).element, 'ArrowRight')
    await flushPromises()
    expect(shape(wrapper)).toBe('Blog(News Home) Bez tytułu (#4)')
    keydown(handle(wrapper, 4).element, 'ArrowUp')
    await flushPromises()
    expect(shape(wrapper)).toBe('Bez tytułu (#4) Blog(News Home)')
    expect(document.activeElement).toBe(handle(wrapper, 4).element)
    expect(requestsTo(calls, 'POST', REORDER)).toHaveLength(0)

    await vi.waitFor(() => {
      expect(requestsTo(calls, 'POST', REORDER)).toHaveLength(1)
    })
    expect(body).toEqual({
      partition: 5,
      nodes: [
        { id: 4, parent_id: null, sort_order: 1 },
        { id: 2, parent_id: null, sort_order: 2 },
        { id: 3, parent_id: 2, sort_order: 3 },
        { id: 1, parent_id: 2, sort_order: 4 },
      ],
    })
    await vi.waitFor(() => {
      expect(wrapper.find('[data-reorder-status]').text()).toBe('Zapisano kolejność')
    })
    expect(wrapper.find('[data-reorder-live]').text()).toBe('Przeniesiono Bez tytułu (#4) na pozycję 1 z 2.')
    await wait(500)
    expect(requestsTo(calls, 'POST', REORDER)).toHaveLength(1)
  })

  it('restores the saved tree when a save fails and reloads on a stale set', async () => {
    let status = 500
    const { wrapper, calls } = await mountApp(
      '/acme/companions/links/reorder',
      {
        [`GET ${REORDER}`]: tree(),
        [`POST ${REORDER}`]: () => ({ status, body: { error: { code: status === 409 ? 'reorder_stale' : 'x', message: 'x', details: {} } } }),
      },
      { attach: true },
    )
    await wrapper.find('[data-reorder-node="1"] [data-action="reorder-down"]').trigger('click')
    expect(shape(wrapper)).toBe('Blog(News) Home Bez tytułu (#4)')
    await vi.waitFor(() => {
      expect(toasts.value[0]).toMatchObject({ text: 'Nie udało się zapisać nowej kolejności. Przywrócono poprzednią.', tone: 'danger' })
    })
    expect(shape(wrapper)).toBe('Home Blog(News) Bez tytułu (#4)')

    status = 409
    await wrapper.find('[data-reorder-node="2"] [data-action="reorder-outdent"]').trigger('click')
    await wrapper.find('[data-reorder-node="3"] [data-action="reorder-outdent"]').trigger('click')
    await vi.waitFor(() => {
      expect(toasts.value[0]).toMatchObject({ text: 'Rekordy zmieniły się w międzyczasie. Lista została wczytana ponownie.', tone: 'danger' })
    })
    await flushPromises()
    expect(requestsTo(calls, 'GET', REORDER)).toHaveLength(2)
    expect(shape(wrapper)).toBe('Home Blog(News) Bez tytułu (#4)')
  })

  it('shows the empty state and the 403 alert', async () => {
    const empty = tree()
    ;(empty.body as { data: { nodes: unknown[] } }).data.nodes = []
    const { wrapper } = await mountApp('/acme/companions/links/reorder', { [`GET ${REORDER}`]: empty })
    expect(wrapper.find('[data-reorder-empty]').text()).toContain('Nie ma jeszcze czego porządkować')
    wrapper.unmount()

    const forbidden = await mountApp('/acme/companions/links/reorder', {
      [`GET ${REORDER}`]: { status: 403, body: { error: { code: 'forbidden', message: 'x', details: {} } } },
    })
    expect(forbidden.wrapper.find('[role="alert"]').text()).toContain('Nie masz uprawnień')
  })
})

describe('list Reorder button', () => {
  it('links to the reorder page with the filtered partition', async () => {
    const schema = clone(listSchemaFixture)
    schema.data.toolbarButtons = ['create', 'reorder']
    schema.data.reorder = { title: 'Reorder links', partition: { column: 'group_id', label: 'Group' } }
    schema.data.filters = [...schema.data.filters, { ...schema.data.filters[0]!, name: 'group', label: 'Group', column: 'group_id' }]
    const routes: Record<string, Route> = {
      [`GET ${BASE}/schema/list`]: { body: schema },
      [`GET ${BASE}`]: { body: listFixture },
    }
    const { wrapper } = await mountApp('/acme/companions/links?filter[group]=6', routes)
    const buttons = wrapper.findAll('header [data-action]').map((button) => button.attributes('data-action'))
    expect(buttons).toEqual(['reorder', 'create'])
    const reorder = wrapper.find('[data-action="reorder"]')
    expect(reorder.text()).toBe('Zmień kolejność rekordów')
    expect(reorder.attributes('href')).toBe('/acme/companions/links/reorder?partition=6')
  })
})

describe('singleton form', () => {
  it('opens the one record from settings, without Delete, and returns to the settings index', async () => {
    setSettings([
      {
        code: 'profile',
        label: 'Site profile',
        description: '',
        icon: 'settings',
        category: 'CMS',
        keywords: [],
        model: '',
        controller: 'acme.companions.profiles',
        order: 1,
      },
    ])
    const schema = clone(companionsFormSchemaFixture)
    schema.data.singleton = true
    schema.data.fields = schema.data.fields.filter((field) => field.name === 'title')
    const PROFILES = `${API}/acme/companions/profiles`
    const { wrapper, router, calls } = await mountApp(
      '/settings',
      {
        [`GET ${PROFILES}/singleton`]: { body: { data: { id: 9 }, meta: {} } },
        [`GET ${PROFILES}/schema/form`]: { body: schema },
        [`GET ${PROFILES}/9`]: { body: { data: { id: 9, title: 'Main site' }, meta: {} } },
      },
      { attach: true },
    )
    await wrapper.find('[data-settings="profile"]').trigger('click', { button: 0 })
    await flushPromises()
    expect(requestsTo(calls, 'GET', `${PROFILES}/singleton`)).toHaveLength(1)
    expect(router.currentRoute.value.path).toBe('/acme/companions/profiles/9')
    expect(wrapper.find('[data-action="delete"]').exists()).toBe(false)
    expect(wrapper.find('[data-action="back"]').attributes('aria-label')).toBe('Wróć do ustawień')

    await wrapper.find('[data-action="cancel"]').trigger('click')
    await flushPromises()
    expect(router.currentRoute.value.path).toBe('/settings')
  })
})