import { RootState } from '@/app/store'
import RepeatEvent from '@/components/Event/EventRepeat'
import * as eventThunks from '@/features/Calendars/services'
import EventPopover from '@/features/Events/EventModal'
import { RepetitionObject } from '@/features/Events/EventsTypes'
import { CalendarApi, DateSelectArg } from '@fullcalendar/core'
import { act, fireEvent, screen, waitFor } from '@testing-library/react'
import { renderWithProviders } from '../utils/Renderwithproviders'

const baseRepetition: RepetitionObject = {
  freq: '',
  interval: 1,
  occurrences: 0,
  endDate: ''
}

const mockOnClose = jest.fn()
const mockSetSelectedRange = jest.fn()
const mockCalendarRef = {
  current: { select: jest.fn() } as unknown as CalendarApi
}

const preloadedState = {
  user: {
    userData: {
      sub: 'test',
      email: 'test@test.com',
      sid: 'aiYbWZSk2g0F+LrQeD7Dg4QcUMR8R/zTZdZBiA7N6Ro',
      openpaasId: '667037022b752d0026472254'
    },
    organiserData: {
      cn: 'test',
      cal_address: 'test@test.com'
    }
  },
  calendars: {
    list: {
      '667037022b752d0026472254/cal1': {
        id: '667037022b752d0026472254/cal1',
        name: 'Calendar 1',
        color: '#FF0000'
      },
      '667037022b752d0026472254/cal2': {
        id: '667037022b752d0026472254/cal2',
        name: 'Calendar 2',
        color: '#00FF00'
      }
    },
    pending: false
  }
}

const defaultSelectedRange = {
  startStr: '2025-07-18T09:00',
  endStr: '2025-07-18T10:00',
  start: new Date('2025-07-18T09:00'),
  end: new Date('2025-07-18T10:00'),
  allDay: false,
  resource: undefined
} as unknown as DateSelectArg

function setupRepeatEvent(
  props?: Partial<RepetitionObject>,
  state?: RootState
) {
  const setRepetition = jest.fn()
  renderWithProviders(
    <RepeatEvent
      repetition={{ ...baseRepetition, ...props }}
      eventStart={defaultSelectedRange.start}
      setRepetition={setRepetition}
      isOwn={true}
    />,
    state
  )
  return { setRepetition }
}

async function setupEventPopover() {
  jest
    .spyOn(crypto, 'randomUUID')
    .mockReturnValue('fixed-uuid-with-correct-format')
  const originalDateResolvedOptions =
    new Intl.DateTimeFormat().resolvedOptions()
  jest.spyOn(Intl.DateTimeFormat.prototype, 'resolvedOptions').mockReturnValue({
    ...originalDateResolvedOptions,
    timeZone: 'UTC'
  })

  renderWithProviders(
    <EventPopover
      anchorEl={document.body}
      open={true}
      onClose={mockOnClose}
      selectedRange={defaultSelectedRange}
      setSelectedRange={mockSetSelectedRange}
      calendarRef={mockCalendarRef}
    />,
    preloadedState
  )

  // Fill in title
  const titleInput = screen.getByLabelText('event.form.title')
  fireEvent.change(titleInput, { target: { value: 'Meeting' } })

  // Click More options to expand the dialog
  const showMoreButton = screen.getByRole('button', {
    name: 'common.moreOptions'
  })
  fireEvent.click(showMoreButton)

  // Check Repeat checkbox to show repeat options
  const repeatCheckbox = screen.getByLabelText('event.form.repeat')
  fireEvent.click(repeatCheckbox)

  // Wait for RepeatEvent component to be rendered
  await waitFor(() => {
    expect(screen.getByText('event.repeat.frequency.weeks')).toBeInTheDocument()
  })
}

async function expectRRule(expected: Partial<RepetitionObject>) {
  const spy = jest
    .spyOn(eventThunks, 'putEventAsync')
    .mockImplementation(payload => {
      const promise = Promise.resolve(payload)
      ;(promise as any).unwrap = () => promise
      return () => promise as any
    })
  const saveButton = screen.getByRole('button', { name: /save/i })
  act(() => fireEvent.click(saveButton))
  await waitFor(() => expect(spy).toHaveBeenCalled())

  const received = spy.mock.calls[0][0]
  expect(received.newEvent.repetition).toMatchObject(expected)
}

describe('RepeatEvent Component', () => {
  beforeEach(() => {
    jest.clearAllMocks()
    jest.restoreAllMocks()
  })

  it('renders with no repetition by default', () => {
    setupRepeatEvent()

    // Check that interval input shows default value
    const intervalInput = screen.getByTestId('repeat-interval')
    expect(intervalInput).toBeInTheDocument()

    // Check that frequency dropdown shows default value
    const frequencySelect = screen.getByRole('combobox')
    expect(frequencySelect).toBeInTheDocument()
  })

  it('allows selecting repetition frequency', () => {
    const { setRepetition } = setupRepeatEvent()

    // Click on frequency dropdown
    const frequencySelect = screen.getByRole('combobox')
    fireEvent.mouseDown(frequencySelect)

    // Select Week(s)
    const weeklyOption = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.click(weeklyOption)

    expect(setRepetition).toHaveBeenCalledWith(
      expect.objectContaining({ freq: 'weekly' })
    )
  })

  it('renders interval input when frequency is selected', () => {
    setupRepeatEvent({ freq: 'daily' })

    const intervalInput = screen.getByTestId('repeat-interval')
    expect(intervalInput).toBeInTheDocument()
  })

  it('updates interval value', () => {
    const { setRepetition } = setupRepeatEvent()

    const intervalInput = screen.getByTestId('repeat-interval')
    fireEvent.change(intervalInput, { target: { value: '3' } })

    expect(setRepetition).toHaveBeenCalledWith(
      expect.objectContaining({ interval: 3 })
    )
  })

  it('toggles day selection for weekly frequency', () => {
    const { setRepetition } = setupRepeatEvent({ freq: 'weekly' })

    const mondayChip = screen.getByLabelText('event.repeat.days.monday')
    fireEvent.click(mondayChip)

    expect(setRepetition).toHaveBeenCalledWith(
      expect.objectContaining({ byday: ['MO'] })
    )
  })
})

describe('Repeat Event Integration Tests', () => {
  // Increase timeout for all tests in this describe block
  jest.setTimeout(30000)
  beforeEach(() => {
    jest.clearAllMocks()
    jest.restoreAllMocks()
  })

  it('sends correct CalendarEvent payload for daily repeat', async () => {
    await setupEventPopover()

    // When Repeat checkbox is checked, repetition is set to empty object
    // We need to set the frequency manually
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const dailyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.days'
    })
    fireEvent.click(dailyOption)

    await expectRRule({ freq: 'daily', interval: 1 })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat daily with 2 day interval', async () => {
    await setupEventPopover()

    // Ensure frequency is daily
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const dailyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.days'
    })
    fireEvent.click(dailyOption)

    // Set interval to 2
    const intervalInput = screen.getByTestId('repeat-interval')
    fireEvent.change(intervalInput, { target: { value: '2' } })

    await expectRRule({ freq: 'daily', interval: 2 })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat daily for 5 repetitions', async () => {
    await setupEventPopover()

    // Ensure frequency is daily
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const dailyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.days'
    })
    fireEvent.click(dailyOption)

    // Select "After" end option
    const afterRadio = screen.getByLabelText(/after/i)
    fireEvent.click(afterRadio)

    // Set occurrences to 5
    const occurrencesInput = screen.getByTestId('occurrences-input')
    fireEvent.change(occurrencesInput, { target: { value: '5' } })

    await expectRRule({ freq: 'daily', interval: 1, occurrences: 5 })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat daily until specific date', async () => {
    await setupEventPopover()

    // Ensure frequency is daily
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const dailyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.days'
    })
    fireEvent.click(dailyOption)

    // Select "On" end option
    const onRadio = screen
      .getAllByLabelText(/on/i)
      .find(el => el.type === 'radio')
    fireEvent.click(onRadio!)

    // End date is set by UI to some valid date string (YYYY-MM-DD)
    await expectRRule({
      freq: 'daily',
      interval: 1,
      endDate: expect.any(String)
    })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat weekly on specific days', async () => {
    await setupEventPopover()

    // Select Week(s) frequency
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const weeklyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.weeks'
    })
    fireEvent.click(weeklyOption)

    // Select Thursday
    const thursdayCheckbox = screen.getByLabelText('event.repeat.days.thursday')
    fireEvent.click(thursdayCheckbox)

    await expectRRule({
      freq: 'weekly',
      interval: 1,
      byday: ['FR', 'TH']
    })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat weekly with 3 week interval', async () => {
    await setupEventPopover()

    // Select Week(s) frequency
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const weeklyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.weeks'
    })
    fireEvent.click(weeklyOption)

    // Set interval to 3
    const intervalInput = screen.getByTestId('repeat-interval')
    fireEvent.change(intervalInput, { target: { value: '3' } })

    await expectRRule({ freq: 'weekly', interval: 3 })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat monthly', async () => {
    await setupEventPopover()

    // Select Month(s) frequency
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const monthlyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.months'
    })
    fireEvent.click(monthlyOption)

    await expectRRule({ freq: 'monthly', interval: 1 })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat monthly and end after 5 occurrences', async () => {
    await setupEventPopover()

    // Select Month(s) frequency
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const monthlyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.months'
    })
    fireEvent.click(monthlyOption)

    // Select "After" end option
    const afterRadio = screen.getByLabelText(/after/i)
    fireEvent.click(afterRadio)

    // Set occurrences to 5
    const occurrencesInput = screen.getByTestId('occurrences-input')
    fireEvent.change(occurrencesInput, { target: { value: '5' } })

    await expectRRule({ freq: 'monthly', interval: 1, occurrences: 5 })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat yearly', async () => {
    await setupEventPopover()

    // Select Year(s) frequency
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const yearlyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.years'
    })
    fireEvent.click(yearlyOption)

    await expectRRule({ freq: 'yearly', interval: 1 })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })

  it('sends correct API payload for repeat yearly with end option changes', async () => {
    await setupEventPopover()

    // Select Year(s) frequency
    const frequencySelect = screen.getByText('event.repeat.frequency.weeks')
    fireEvent.mouseDown(frequencySelect)
    const yearlyOption = screen.getByRole('option', {
      name: 'event.repeat.frequency.years'
    })
    fireEvent.click(yearlyOption)

    // First choose "After" with 5 occurrences
    const afterRadio = screen.getByLabelText(/after/i)
    fireEvent.click(afterRadio)
    const occurrencesInput = screen.getByTestId('occurrences-input')
    fireEvent.change(occurrencesInput, { target: { value: '5' } })

    // Then change mind and choose "Never"
    const neverRadio = screen.getByLabelText(/never/i)
    fireEvent.click(neverRadio)

    await expectRRule({
      freq: 'yearly',
      interval: 1
    })
    expect(mockOnClose).toHaveBeenCalledWith(true)
  })
})