import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
import { render, screen, waitFor } from '@testing-library/react'
import userEvent from '@testing-library/user-event'
import { MemoryRouter, Route, Routes } from 'react-router-dom'

import { WelcomeStep3 } from '../WelcomeStep3'
import { useAuthStore } from '@/store/authStore'
import { onboardingApi } from '@/api/onboarding'
import { accountsApi } from '@/api/accounts'
import type { Account, User } from '@/types'

vi.mock('@/api/onboarding', async () => {
  const actual = await vi.importActual<typeof import('@/api/onboarding')>(
    '@/api/onboarding',
  )
  return {
    ...actual,
    onboardingApi: {
      ...actual.onboardingApi,
      updateStep: vi.fn(),
      dismissRest: vi.fn(),
    },
  }
})

vi.mock('@/api/accounts', async () => {
  const actual = await vi.importActual<typeof import('@/api/accounts')>(
    '@/api/accounts',
  )
  return {
    ...actual,
    accountsApi: {
      ...actual.accountsApi,
      bulkInvite: vi.fn(),
    },
  }
})

vi.mock('@/lib/toast', () => ({
  toast: {
    success: vi.fn(),
    error: vi.fn(),
    info: vi.fn(),
    warning: vi.fn(),
    promise: vi.fn(),
  },
}))

function makeUser(overrides: Partial<User> = {}): User {
  return {
    id: 'user-1',
    email: 'test@example.com',
    name: 'Test User',
    role: 'engineer',
    is_super_admin: false,
    is_active: true,
    must_change_password: false,
    account_id: 'acct-1',
    account_role: 'owner',
    team_id: null,
    created_at: '2026-05-01T00:00:00Z',
    last_login: null,
    phone: null,
    job_title: null,
    timezone: 'UTC',
    avatar_url: null,
    email_verified_at: null,
    onboarding_step_completed: 2,
    onboarding_dismissed: false,
    ...overrides,
  }
}

function makeAccount(overrides: Partial<Account> = {}): Account {
  return {
    id: 'acct-1',
    name: 'Acme MSP',
    display_code: 'ACME',
    owner_id: 'user-1',
    created_at: '2026-05-01T00:00:00Z',
    updated_at: '2026-05-01T00:00:00Z',
    ...overrides,
  }
}

function renderPage() {
  return render(
    <MemoryRouter initialEntries={['/welcome/step-3']}>
      <Routes>
        <Route path="/welcome/step-3" element={<WelcomeStep3 />} />
        <Route path="/home" element={<div>dashboard</div>} />
      </Routes>
    </MemoryRouter>,
  )
}

describe('WelcomeStep3', () => {
  beforeEach(() => {
    useAuthStore.setState({
      user: makeUser(),
      account: makeAccount(),
      subscription: null,
      token: null,
      isAuthenticated: true,
      fetchUser: vi.fn().mockResolvedValue(undefined),
    })
    vi.mocked(onboardingApi.updateStep).mockResolvedValue({
      onboarding_step_completed: 3,
      onboarding_dismissed: false,
    })
    vi.mocked(onboardingApi.dismissRest).mockResolvedValue({
      onboarding_step_completed: null,
      onboarding_dismissed: true,
    })
    vi.mocked(accountsApi.bulkInvite).mockResolvedValue({
      created: [],
      failed: [],
    })
  })

  afterEach(() => {
    vi.clearAllMocks()
  })

  it('valid emails create invites and complete wizard', async () => {
    const user = userEvent.setup()
    vi.mocked(accountsApi.bulkInvite).mockResolvedValueOnce({
      created: [
        {
          id: 'inv-1',
          account_id: 'acct-1',
          email: 'a@example.com',
          role: 'engineer',
          code: 'c1',
          expires_at: null,
          used_at: null,
          created_at: '2026-05-06T00:00:00Z',
        },
        {
          id: 'inv-2',
          account_id: 'acct-1',
          email: 'b@example.com',
          role: 'viewer',
          code: 'c2',
          expires_at: null,
          used_at: null,
          created_at: '2026-05-06T00:00:00Z',
        },
      ],
      failed: [],
    })
    renderPage()

    await user.type(screen.getByTestId('welcome-step-3-email-0'), 'a@example.com')
    await user.type(screen.getByTestId('welcome-step-3-email-1'), 'b@example.com')
    await user.selectOptions(screen.getByTestId('welcome-step-3-role-1'), 'viewer')

    await user.click(screen.getByTestId('welcome-step-3-send'))

    await waitFor(() => {
      expect(accountsApi.bulkInvite).toHaveBeenCalledWith([
        { email: 'a@example.com', role: 'engineer' },
        { email: 'b@example.com', role: 'viewer' },
      ])
    })

    await waitFor(() => {
      expect(onboardingApi.updateStep).toHaveBeenCalledWith({
        step: 3,
        action: 'complete',
      })
    })

    await waitFor(() => {
      expect(screen.getByText('dashboard')).toBeInTheDocument()
    })
  })

  it('partial-failure shows inline error per failed email', async () => {
    const user = userEvent.setup()
    vi.mocked(accountsApi.bulkInvite).mockResolvedValueOnce({
      created: [
        {
          id: 'inv-1',
          account_id: 'acct-1',
          email: 'good@example.com',
          role: 'engineer',
          code: 'c1',
          expires_at: null,
          used_at: null,
          created_at: '2026-05-06T00:00:00Z',
        },
      ],
      failed: [
        { email: 'bad@example.com', error: 'Email already invited' },
      ],
    })
    renderPage()

    await user.type(screen.getByTestId('welcome-step-3-email-0'), 'good@example.com')
    await user.type(screen.getByTestId('welcome-step-3-email-1'), 'bad@example.com')

    await user.click(screen.getByTestId('welcome-step-3-send'))

    await waitFor(() => {
      expect(accountsApi.bulkInvite).toHaveBeenCalled()
    })

    // The bad-email row shows the error text.
    await waitFor(() => {
      expect(screen.getByTestId('welcome-step-3-row-error-1')).toHaveTextContent(
        /already invited/i,
      )
    })

    // Wizard did NOT auto-advance — onboarding-step is unchanged.
    expect(onboardingApi.updateStep).not.toHaveBeenCalled()
    expect(screen.queryByText('dashboard')).not.toBeInTheDocument()

    // "Continue anyway" is offered.
    expect(screen.getByTestId('welcome-step-3-continue-anyway')).toBeInTheDocument()
  })

  it('empty + Skip advances without sending invites', async () => {
    const user = userEvent.setup()
    renderPage()

    await user.click(screen.getByTestId('welcome-step-3-skip'))

    await waitFor(() => {
      expect(onboardingApi.updateStep).toHaveBeenCalledWith({
        step: 3,
        action: 'skip',
      })
    })

    // No bulk-invite call.
    expect(accountsApi.bulkInvite).not.toHaveBeenCalled()

    await waitFor(() => {
      expect(screen.getByText('dashboard')).toBeInTheDocument()
    })
  })

  it('empty + Send is a no-op bulk call but still completes the step', async () => {
    const user = userEvent.setup()
    renderPage()

    // All rows blank — Send should skip the bulk call entirely and just
    // mark the step complete.
    await user.click(screen.getByTestId('welcome-step-3-send'))

    await waitFor(() => {
      expect(onboardingApi.updateStep).toHaveBeenCalledWith({
        step: 3,
        action: 'complete',
      })
    })
    expect(accountsApi.bulkInvite).not.toHaveBeenCalled()
  })

  it('+ Add another adds a row, capped at 10', async () => {
    const user = userEvent.setup()
    renderPage()

    // Starts with 3 default rows.
    expect(screen.getByTestId('welcome-step-3-email-0')).toBeInTheDocument()
    expect(screen.getByTestId('welcome-step-3-email-1')).toBeInTheDocument()
    expect(screen.getByTestId('welcome-step-3-email-2')).toBeInTheDocument()
    expect(screen.queryByTestId('welcome-step-3-email-3')).not.toBeInTheDocument()

    const addBtn = screen.getByTestId('welcome-step-3-add-row')
    // Click 7 more times → 10 total.
    for (let i = 0; i < 7; i++) await user.click(addBtn)
    expect(screen.getByTestId('welcome-step-3-email-9')).toBeInTheDocument()
    // Capped — button disabled at 10.
    expect(addBtn).toBeDisabled()
  })
})