import { act, renderHook } from '@testing-library/react'
import { beforeEach, describe, expect, it, vi } from 'vitest'

import useAdminCrudFormModal from '@/hooks/useAdminCrudFormModal'
import type { ServiceResult } from '@/services/errorHandler'

const addToast = vi.fn()

vi.mock('@/lib/toast', () => ({ addToast: (...args: unknown[]) => addToast(...args) }))

interface Entity {
  id: string
  name: string
}
interface FormValues {
  name: string
}

const emptyValues: FormValues = { name: '' }
const toFormValues = (entity: Entity): FormValues => ({ name: entity.name })
const buildPayload = (values: FormValues) => ({ name: values.name })
const resolver = vi.fn(async (values: FormValues) => ({ values, errors: {} }))

const setup = () => {
  const create = vi.fn<(payload: { name: string }) => Promise<ServiceResult<unknown>>>()
  const update = vi.fn<(id: string, payload: { name: string }) => Promise<ServiceResult<unknown>>>()
  const onOpenChange = vi.fn()
  const onSuccess = vi.fn()

  const { result, rerender } = renderHook(
    (props: { entity: Entity | undefined; isOpen: boolean }) =>
      useAdminCrudFormModal({
        entity: props.entity,
        isOpen: props.isOpen,
        emptyValues,
        toFormValues,

        resolver: resolver as any,
        buildPayload,
        create,
        update,
        getId: (entity) => entity.id,
        successMessage: { create: 'ایجاد شد', edit: 'ویرایش شد' },
        onOpenChange,
        onSuccess,
      }),
    { initialProps: { entity: undefined as Entity | undefined, isOpen: false } }
  )

  return { result, rerender, create, update, onOpenChange, onSuccess }
}

describe('useAdminCrudFormModal', () => {
  beforeEach(() => addToast.mockClear())

  it('derives isEdit from whether an entity is present', () => {
    const { result: createResult } = setup()

    expect(createResult.current.isEdit).toBe(false)

    // `entity` is a dependency of the hook's reset-on-open effect, so it
    // must be a stable reference across renders here — an inline object
    // literal recreated on every render of this renderHook callback would
    // make the effect refire every render (reset -> re-render -> new
    // `entity` identity -> effect deps changed -> reset -> ...), an
    // infinite loop. Hoisting it above avoids that footgun.
    const existingEntity: Entity = { id: '1', name: 'existing' }
    const { result: editResult } = renderHook(() =>
      useAdminCrudFormModal({
        entity: existingEntity,
        isOpen: true,
        emptyValues,
        toFormValues,

        resolver: resolver as any,
        buildPayload,
        create: vi.fn(),
        update: vi.fn(),
        getId: (entity) => entity.id,
        successMessage: { create: 'ایجاد شد', edit: 'ویرایش شد' },
        onOpenChange: vi.fn(),
        onSuccess: vi.fn(),
      })
    )

    expect(editResult.current.isEdit).toBe(true)
  })

  it('resets the form to the entity values only on the isOpen transition, not on every render', () => {
    const { result, rerender } = setup()

    // Opening with an entity resets to its mapped values.
    rerender({ entity: { id: '1', name: 'Ali' }, isOpen: true })
    expect(result.current.form.getValues()).toEqual({ name: 'Ali' })

    // A render while still open with a *different* entity object identity
    // but the effect's dependency array (`entity`) does change here, so it
    // re-resets — this models the "modal re-opens for a different node"
    // case the source comment documents, not a same-entity re-render.
    rerender({ entity: { id: '2', name: 'Reza' }, isOpen: true })
    expect(result.current.form.getValues()).toEqual({ name: 'Reza' })

    // Closing does not clear the form back to empty values (no reset fires
    // while isOpen is false) — the modal is expected to unmount/hide, not
    // to have its draft wiped on close.
    rerender({ entity: { id: '2', name: 'Reza' }, isOpen: false })
    expect(result.current.form.getValues()).toEqual({ name: 'Reza' })
  })

  it('resets to emptyValues when opening for create (no entity)', () => {
    const { result, rerender } = setup()

    rerender({ entity: undefined, isOpen: true })
    expect(result.current.form.getValues()).toEqual({ name: '' })
  })

  it('on submit success: shows the success toast, closes, then refreshes — in that order, no earlier', async () => {
    const { result, rerender, create, onOpenChange, onSuccess } = setup()

    create.mockResolvedValue({ ok: true, data: {} })
    rerender({ entity: undefined, isOpen: true })

    const callOrder: string[] = []

    onOpenChange.mockImplementation(() => callOrder.push('close'))
    onSuccess.mockImplementation(() => callOrder.push('success'))
    addToast.mockImplementation(() => callOrder.push('toast'))

    await act(async () => {
      result.current.form.setValue('name', 'New item')
      await result.current.handleSubmit()
    })

    expect(create).toHaveBeenCalledWith({ name: 'New item' })
    expect(addToast).toHaveBeenCalledWith({ title: 'ایجاد شد', color: 'success' })
    expect(onOpenChange).toHaveBeenCalledWith(false)
    expect(onSuccess).toHaveBeenCalledOnce()
    expect(callOrder).toEqual(['toast', 'close', 'success'])
    expect(result.current.submitting).toBe(false)
  })

  it('on submit success while editing: calls update with the entity id, not create', async () => {
    const entity = { id: 'entity-1', name: 'Existing' }
    const { result, rerender, create, update } = setup()

    update.mockResolvedValue({ ok: true, data: {} })
    rerender({ entity, isOpen: true })

    await act(async () => {
      result.current.form.setValue('name', 'Renamed')
      await result.current.handleSubmit()
    })

    expect(update).toHaveBeenCalledWith('entity-1', { name: 'Renamed' })
    expect(create).not.toHaveBeenCalled()
    expect(addToast).toHaveBeenCalledWith({ title: 'ویرایش شد', color: 'success' })
  })

  it('on submit failure: does not toast, does not close, and resets submitting to false', async () => {
    const { result, rerender, create, onOpenChange, onSuccess } = setup()

    create.mockResolvedValue({ ok: false, error: { message: 'خطا' } as never })
    rerender({ entity: undefined, isOpen: true })

    await act(async () => {
      result.current.form.setValue('name', 'New item')
      await result.current.handleSubmit()
    })

    expect(addToast).not.toHaveBeenCalled()
    expect(onOpenChange).not.toHaveBeenCalled()
    expect(onSuccess).not.toHaveBeenCalled()
    expect(result.current.submitting).toBe(false)
  })
})