import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
import { enableAutoUnmount, flushPromises, mount, type VueWrapper } from '@vue/test-utils'
import { ref } from 'vue'
import type { AdminRecord, FormField } from '../../src/api/types'
// The registry first: it imports RepeaterField, whose FormGrid imports it back.
import '../../src/components/form/registry'
import RepeaterField from '../../src/components/form/fields/RepeaterField.vue'
import { FORM_FEEDBACK, type FormFeedback } from '../../src/components/form/formContext'
import { companionsFormSchemaFixture } from '../fixtures/typed'
import { API, keydown, mountApp, requestsTo, resetState, type Route } from '../helpers'

// Phase 17 plan 02 smoke specs for the repeater field (D-07). Plan 06
// completes the coverage.
const BASE = `${API}/acme/companions/links`
const RECORD = `${BASE}/1`
const TARGETS = `${BASE}/fields/rows.target/dependent-options`

function record() {
  return {
    data: {
      id: 1,
      title: 'Docs',
      description: '',
      rows: [
        { question: 'First', kind: 'url', target: null, visible: true },
        { question: 'Second', kind: 'url', target: null, visible: false },
      ],
    },
    meta: {},
  }
}

function routes(overrides: Record<string, Route> = {}): Record<string, Route> {
  return {
    [`GET ${BASE}/schema/form`]: { body: companionsFormSchemaFixture },
    [`GET ${RECORD}`]: { body: record() },
    [`GET ${TARGETS}`]: { body: { data: { applies: false, options: [] }, meta: {} } },
    ...overrides,
  }
}

const titles = (wrapper: VueWrapper) => wrapper.findAll('[data-repeater="rows"] [data-repeater-title]').map((node) => node.text())
const rowAt = (wrapper: VueWrapper, index: number) => wrapper.find(`[data-repeater="rows"] [data-repeater-row="${index}"]`)

function confirmDialog(): HTMLElement | null {
  return document.body.querySelector('[data-confirm-dialog] [data-action="confirm"]')
}

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

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

enableAutoUnmount(afterEach)

describe('RepeaterField', () => {
  it('RepeaterField tracer: add, edit nested, reorder and remove change form state only', async () => {
    let body: Record<string, unknown> | null = null
    const { wrapper, calls } = await mountApp(
      '/acme/companions/links/1',
      routes({
        [`PUT ${RECORD}`]: async (request) => {
          body = (await request.json()) as Record<string, unknown>
          return { body: { data: { id: 1, ...body }, meta: {} } }
        },
      }),
      { attach: true },
    )
    const group = wrapper.find('[data-repeater="rows"]')
    expect(group.attributes('role')).toBe('group')
    expect(group.attributes('aria-labelledby')).toBe('field-rows-label')
    expect(wrapper.find('#field-rows-label').text()).toBe('Questions')
    expect(titles(wrapper)).toEqual(['First', 'Second'])
    expect(wrapper.find('[data-repeater-count]').text()).toBe('Pozycje: 2 z 3')

    // Add: a third row with nested defaults; the counter reaches maxItems.
    await wrapper.find('[data-action="repeater-add"]').trigger('click')
    await flushPromises()
    expect(titles(wrapper)).toEqual(['First', 'Second', 'Pozycja 3'])
    expect(wrapper.find('[data-action="repeater-add"]').attributes('disabled')).toBeDefined()
    expect(wrapper.find('[data-repeater-count]').text()).toBe('Pozycje: 3 z 3')

    // Edit a nested field: the row title follows titleFrom.
    const third = rowAt(wrapper, 2)
    const question = third.find<HTMLInputElement>('[data-field="question"] input')
    expect(question.attributes('id')).toMatch(/^field-rows-r\d+-question$/)
    await question.setValue('Third')
    expect(titles(wrapper)).toEqual(['First', 'Second', 'Third'])

    // Reorder by button and by keyboard on the handle; the move is announced.
    await rowAt(wrapper, 0).find('[data-action="repeater-down"]').trigger('click')
    await flushPromises()
    expect(titles(wrapper)).toEqual(['Second', 'First', 'Third'])
    await vi.waitFor(() => {
      expect(wrapper.find('[data-form-live]').text()).toBe('Przeniesiono First na pozycję 2 z 3.')
    })
    const handle = rowAt(wrapper, 2).find('[data-repeater-handle]')
    keydown(handle.element, 'ArrowUp')
    await flushPromises()
    expect(titles(wrapper)).toEqual(['Second', 'Third', 'First'])
    expect(document.activeElement).toBe(rowAt(wrapper, 1).find('[data-repeater-handle]').element)

    // Remove a row that holds a value: it asks first.
    await rowAt(wrapper, 0).find('[data-action="repeater-remove"]').trigger('click')
    await flushPromises()
    expect(confirmDialog()).not.toBeNull()
    expect(document.body.querySelector('[data-confirm-dialog]')!.textContent).toContain('Usunąć „Second”?')
    confirmDialog()!.click()
    await flushPromises()
    expect(titles(wrapper)).toEqual(['Third', 'First'])

    // An added row holding only its defaults is removed at once.
    await wrapper.find('[data-action="repeater-add"]').trigger('click')
    await flushPromises()
    await rowAt(wrapper, 2).find('[data-action="repeater-remove"]').trigger('click')
    await flushPromises()
    expect(confirmDialog()).toBeNull()
    expect(titles(wrapper)).toEqual(['Third', 'First'])

    // Nothing was sent before Save; Save sends the rows as edited.
    expect(requestsTo(calls, 'PUT', RECORD)).toHaveLength(0)
    expect(calls.every((request) => request.method === 'GET')).toBe(true)
    await wrapper.find('[data-action="save"]').trigger('click')
    await flushPromises()
    expect(requestsTo(calls, 'PUT', RECORD)).toHaveLength(1)
    expect(body!.rows).toEqual([
      { question: 'Third', kind: null, target: null, visible: true },
      { question: 'First', kind: 'url', target: null, visible: true },
    ])
  })

  it('expands rows with path errors, shows the chip and focuses the first invalid nested control', async () => {
    const { wrapper } = await mountApp(
      '/acme/companions/links/1',
      routes({
        [`PUT ${RECORD}`]: {
          status: 422,
          body: { error: { code: 'validation_failed', message: 'Validation failed', details: { 'rows.1.question': ['Question is required.'] } } },
        },
      }),
      { attach: true },
    )
    // Collapse the second row first: the error opens it again.
    await rowAt(wrapper, 1).find('[data-action="repeater-toggle"]').trigger('click')
    await flushPromises()
    expect(rowAt(wrapper, 1).find('[data-field="question"]').exists()).toBe(false)

    await wrapper.find('[data-action="save"]').trigger('click')
    await flushPromises()

    const row = rowAt(wrapper, 1)
    expect(row.classes()).toContain('border-danger')
    expect(row.find('[data-repeater-errors]').text()).toBe('1 błąd')
    expect(row.find('[data-field="question"]').text()).toContain('Question is required.')
    expect(document.activeElement).toBe(row.find('[data-field="question"] input').element)
    // The banner counts it but does not repeat the row message.
    expect(wrapper.find('[data-error-banner]').text()).not.toContain('Question is required.')
  })

  it('shows the empty state with the prompt', async () => {
    const { wrapper } = await mountApp(
      '/acme/companions/links/1',
      routes({ [`GET ${RECORD}`]: { body: { data: { id: 1, title: 'Docs', rows: [] }, meta: {} } } }),
    )
    expect(wrapper.find('[data-repeater-empty]').text()).toContain('Brak pozycji')
    expect(wrapper.find('[data-repeater-empty]').text()).toContain('Użyj przycisku „Add question” poniżej, aby dodać pierwszą.')
    expect(wrapper.find('[data-action="repeater-add"]').text()).toBe('Add question')
  })
})

// Plan 06 coverage on the field alone, with a recording form feedback:
// row bounds, remove and reorder semantics, collapsed rows, read-only.
const field: FormField = {
  name: 'rows',
  label: 'Rows',
  type: 'repeater',
  span: 'full',
  titleFrom: 'title',
  minItems: 1,
  maxItems: 3,
  form: {
    fields: [
      { name: 'title', type: 'text', label: 'Title', span: 'left' },
      { name: 'body', type: 'richeditor', label: 'Body', span: 'full' },
      { name: 'on', type: 'checkbox', label: 'On', span: 'right', default: true },
    ],
  },
} as FormField

function repeater(rows: AdminRecord[], options: { confirm?: boolean; readOnly?: boolean } = {}) {
  const announced: string[] = []
  const asked: string[] = []
  const feedback: FormFeedback = {
    errors: ref({}),
    notices: ref({}),
    clearError: () => undefined,
    announce: (text) => announced.push(text),
    confirm: async (request) => {
      asked.push(request.message)
      return options.confirm ?? true
    },
  }
  const wrapper: VueWrapper = mount(RepeaterField, {
    props: {
      field: options.readOnly ? { ...field, readOnly: true } : field,
      modelValue: rows,
      controlId: 'field-rows',
      'onUpdate:modelValue': (value: unknown) => wrapper.setProps({ modelValue: value }),
    },
    global: { provide: { [FORM_FEEDBACK as symbol]: feedback } },
    attachTo: document.body,
  })
  const values = () => (wrapper.props() as { modelValue: AdminRecord[] }).modelValue
  return { wrapper, announced, asked, values }
}

const rowsOf = (wrapper: VueWrapper) => wrapper.findAll('[data-repeater-title]').map((node) => node.text())
const row = (wrapper: VueWrapper, index: number) => wrapper.find(`[data-repeater-row="${index}"]`)

describe('RepeaterField rows', () => {
  it('enforces minItems and maxItems on remove, add and the counter', async () => {
    const { wrapper, values } = repeater([{ title: 'Only', body: null, on: true }])
    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
    expect(row(wrapper, 0).find('[data-action="repeater-remove"]').attributes('disabled')).toBeDefined()
    expect(wrapper.find('[data-repeater-count]').text()).toBe('Pozycje: 1 z 3')
    expect(wrapper.find('[data-action="repeater-toggle-all"]').exists()).toBe(false)

    await wrapper.find('[data-action="repeater-add"]').trigger('click')
    await wrapper.find('[data-action="repeater-add"]').trigger('click')
    await flushPromises()
    expect(values()).toEqual([
      { title: 'Only', body: null, on: true },
      { title: null, body: null, on: true },
      { title: null, body: null, on: true },
    ])
    expect(rowsOf(wrapper)).toEqual(['Only', 'Pozycja 2', 'Pozycja 3'])
    expect(wrapper.find('[data-action="repeater-add"]').attributes('disabled')).toBeDefined()
    expect(wrapper.find('[data-repeater-count]').text()).toBe('Pozycje: 3 z 3')
    // A fourth add does nothing.
    await wrapper.find('[data-action="repeater-add"]').trigger('click')
    expect(values()).toHaveLength(3)
    expect(row(wrapper, 0).find('[data-action="repeater-remove"]').attributes('disabled')).toBeUndefined()
  })

  it('asks before removing a row with a value, never for an empty or default row, and keeps it on cancel', async () => {
    const { wrapper, asked, values } = repeater(
      [
        { title: 'Kept', body: null, on: true },
        { title: '', body: '', on: true },
        { title: null, body: '<p>text</p>', on: true },
      ],
      { confirm: false },
    )
    // Only defaults and empty values: removed at once.
    await row(wrapper, 1).find('[data-action="repeater-remove"]').trigger('click')
    await flushPromises()
    expect(asked).toEqual([])
    expect(values()).toHaveLength(2)
    // A rich text value: asked, and cancel keeps the row.
    await row(wrapper, 1).find('[data-action="repeater-remove"]').trigger('click')
    await flushPromises()
    expect(asked).toEqual(['Usunąć „Pozycja 2”? Zmiana zostanie zapisana razem z rekordem.'])
    expect(values()).toHaveLength(2)
    expect(rowsOf(wrapper)).toEqual(['Kept', 'Pozycja 2'])
    // Removing moves focus to the handle that takes the row's place.
    const confirmed = repeater([{ title: 'A' }, { title: 'B' }, { title: 'C' }], { confirm: true })
    await row(confirmed.wrapper, 1).find('[data-action="repeater-remove"]').trigger('click')
    await flushPromises()
    expect(confirmed.asked).toHaveLength(1)
    expect(rowsOf(confirmed.wrapper)).toEqual(['A', 'C'])
    expect(document.activeElement).toBe(row(confirmed.wrapper, 1).find('[data-repeater-handle]').element)
  })

  it('reorders by the arrow keys and the buttons, announces repeater.moved and stops at the ends', async () => {
    const { wrapper, announced, values } = repeater([{ title: 'A' }, { title: 'B' }, { title: 'C' }])
    expect(row(wrapper, 0).find('[data-action="repeater-up"]').attributes('disabled')).toBeDefined()
    expect(row(wrapper, 2).find('[data-action="repeater-down"]').attributes('disabled')).toBeDefined()

    keydown(row(wrapper, 0).find('[data-repeater-handle]').element, 'ArrowUp')
    await flushPromises()
    expect(wrapper.emitted('update:modelValue')).toBeUndefined()

    const down = keydown(row(wrapper, 0).find('[data-repeater-handle]').element, 'ArrowDown')
    await flushPromises()
    expect(down.defaultPrevented).toBe(true)
    expect(rowsOf(wrapper)).toEqual(['B', 'A', 'C'])
    expect(document.activeElement).toBe(row(wrapper, 1).find('[data-repeater-handle]').element)
    expect(announced).toEqual(['Przeniesiono A na pozycję 2 z 3.'])

    await row(wrapper, 2).find('[data-action="repeater-up"]').trigger('click')
    await flushPromises()
    expect(rowsOf(wrapper)).toEqual(['B', 'C', 'A'])
    await row(wrapper, 0).find('[data-action="repeater-down"]').trigger('click')
    await flushPromises()
    expect(rowsOf(wrapper)).toEqual(['C', 'B', 'A'])
    expect(announced).toEqual(['Przeniesiono A na pozycję 2 z 3.', 'Przeniesiono C na pozycję 2 z 3.', 'Przeniesiono B na pozycję 2 z 3.'])
    expect(values().map((item) => item.title)).toEqual(['C', 'B', 'A'])
    // Other keys do nothing.
    const other = keydown(row(wrapper, 0).find('[data-repeater-handle]').element, 'ArrowRight')
    expect(other.defaultPrevented).toBe(false)
  })

  it('collapsed rows do not mount their richeditors and keep their values', async () => {
    const { wrapper, values } = repeater([
      { title: 'A', body: '<p>one</p>' },
      { title: 'B', body: '<p>two</p>' },
    ])
    const editors = () => wrapper.findAll('[data-field="body"]').length
    expect(editors()).toBe(2)
    await row(wrapper, 0).find('[data-action="repeater-toggle"]').trigger('click')
    expect(row(wrapper, 0).find('[data-repeater-body]').exists()).toBe(false)
    expect(row(wrapper, 0).find('[data-action="repeater-toggle"]').attributes('aria-expanded')).toBe('false')
    expect(editors()).toBe(1)

    const all = wrapper.find('[data-action="repeater-toggle-all"]')
    expect(all.text()).toBe('Zwiń wszystkie')
    await all.trigger('click')
    expect(editors()).toBe(0)
    expect(wrapper.find('[data-action="repeater-toggle-all"]').text()).toBe('Rozwiń wszystkie')
    expect(wrapper.emitted('update:modelValue')).toBeUndefined()
    expect(values()).toEqual([
      { title: 'A', body: '<p>one</p>' },
      { title: 'B', body: '<p>two</p>' },
    ])

    await wrapper.find('[data-action="repeater-toggle-all"]').trigger('click')
    expect(editors()).toBe(2)
    expect(row(wrapper, 1).find('[data-action="repeater-toggle"]').attributes('aria-controls')).toBe(row(wrapper, 1).find('[data-repeater-body]').attributes('id'))
  })

  it('read-only shows every row expanded with no controls', () => {
    const { wrapper } = repeater([{ title: 'A', body: '<p>one</p>' }], { readOnly: true })
    expect(wrapper.find('[data-repeater-handle]').exists()).toBe(false)
    expect(wrapper.find('[data-action="repeater-add"]').exists()).toBe(false)
    expect(wrapper.find('[data-action="repeater-remove"]').exists()).toBe(false)
    expect(wrapper.find('[data-repeater-body]').exists()).toBe(true)
  })
})