import React from 'react'
import { Linking } from 'react-native'
import { act, create, type ReactTestRenderer } from 'react-test-renderer'

const mockGetAuthCapabilities = jest.fn()
const mockSignInWithOAuthProvider = jest.fn()
const mockNavigation = {
  canGoBack: jest.fn(() => true),
  goBack: jest.fn(),
  navigate: jest.fn(),
}

jest.mock('@react-navigation/native', () => ({
  useNavigation: () => mockNavigation,
}))
jest.mock('react-native-safe-area-context', () => ({
  useSafeAreaInsets: () => ({ top: 0, bottom: 0, left: 0, right: 0 }),
}))
jest.mock('@d3ro/i18n', () => ({
  useI18n: () => ({
    locale: 'ko',
    t: (key: string) => key,
  }),
}))
jest.mock('../src/lib/preferences-context', () => ({
  useMobilePreferences: () => ({
    palette: {
      bg: { app: '#000', card: '#181818', inset: '#202020', cardHover: '#222' },
      text: { primary: '#fff', muted: '#999', onAccent: '#000' },
      border: { default: '#444', strong: '#666' },
      accent: { main: '#fc0' },
      tag: { red: '#f66' },
    },
  }),
}))
jest.mock('../src/lib/auth-context', () => ({
  useAuth: () => ({ authError: null }),
}))
jest.mock('../src/lib/auth-capabilities', () => ({
  getAuthCapabilities: (...args: unknown[]) => mockGetAuthCapabilities(...args),
}))
jest.mock('../src/lib/supabase', () => ({
  isSupabaseConfigured: () => true,
  supabase: {
    auth: {
      signUp: jest.fn(),
      resend: jest.fn(),
    },
  },
}))
jest.mock('../src/lib/auth-redirect', () => ({
  AUTH_REDIRECT_URL: 'd3ro-voice://auth-callback',
}))
jest.mock('../src/features/auth/oauth-sign-in', () => {
  class OAuthSignInError extends Error {
    readonly code: 'oauth_url_failed' | 'oauth_callback_failed'

    constructor(code: 'oauth_url_failed' | 'oauth_callback_failed') {
      super(code)
      this.code = code
    }
  }

  return {
    OAuthSignInError,
    signInWithOAuthProvider: (...args: unknown[]) => mockSignInWithOAuthProvider(...args),
  }
})

import SignUpScreen from '../src/screens/SignUpScreen'

const ENABLED_CAPABILITIES = {
  signUpEnabled: true,
  emailEnabled: true,
  googleEnabled: true,
  githubEnabled: false,
  appleEnabled: false,
}

async function renderScreen(): Promise<ReactTestRenderer> {
  let renderer: ReactTestRenderer
  await act(async () => {
    renderer = create(<SignUpScreen />)
    await Promise.resolve()
    await Promise.resolve()
  })
  return renderer!
}

describe('SignUpScreen Google OAuth discoverability', () => {
  beforeEach(() => {
    mockGetAuthCapabilities.mockReset().mockResolvedValue(ENABLED_CAPABILITIES)
    mockSignInWithOAuthProvider.mockReset().mockResolvedValue('cancelled')
    jest.spyOn(Linking, 'openURL').mockResolvedValue(true)
  })

  afterEach(() => {
    jest.restoreAllMocks()
  })

  it('shows an accessible Google sign-up CTA only when the server enables it', async () => {
    const enabled = await renderScreen()
    const button = enabled.root.findByProps({ testID: 'signup-oauth-google' })

    expect(button.props.accessibilityLabel).toBe('mobile.signup.google')
    expect(button.props.accessibilityHint).toBe('mobile.signup.googleHint')
    expect(button.props.accessibilityState).toEqual({ disabled: true, busy: false })
    expect(enabled.root.findByProps({ testID: 'sign-up-terms' })).toBeTruthy()
    expect(enabled.root.findByProps({ testID: 'sign-up-submit' })).toBeTruthy()

    mockGetAuthCapabilities.mockReset().mockResolvedValue({
      ...ENABLED_CAPABILITIES,
      signUpEnabled: false,
    })
    const existingGoogleAccount = await renderScreen()
    expect(existingGoogleAccount.root.findByProps({ testID: 'signup-oauth-google' })).toBeTruthy()

    mockGetAuthCapabilities.mockReset().mockResolvedValue({
      ...ENABLED_CAPABILITIES,
      googleEnabled: false,
    })
    const disabled = await renderScreen()
    expect(() => disabled.root.findByProps({ testID: 'signup-oauth-google' })).toThrow()
    expect(disabled.root.findByProps({ testID: 'sign-up-submit' })).toBeTruthy()
  })

  it('locks both sign-up paths while OAuth is active and treats cancellation as non-fatal', async () => {
    let resolveOAuth: ((value: 'cancelled') => void) | null = null
    mockSignInWithOAuthProvider.mockReturnValue(new Promise((resolve) => {
      resolveOAuth = resolve
    }))
    const renderer = await renderScreen()
    await act(async () => {
      renderer.root.findByProps({ testID: 'sign-up-terms' }).props.onPress()
    })
    const button = renderer.root.findByProps({ testID: 'signup-oauth-google' })

    await act(async () => {
      button.props.onPress()
      await Promise.resolve()
    })

    expect(mockSignInWithOAuthProvider).toHaveBeenCalledWith('google')
    expect(renderer.root.findByProps({ testID: 'signup-oauth-google' }).props.disabled).toBe(true)
    expect(renderer.root.findByProps({ testID: 'signup-oauth-google' }).props.accessibilityState)
      .toEqual({ disabled: true, busy: true })
    expect(renderer.root.findByProps({ testID: 'signup-oauth-google-loading' })).toBeTruthy()
    expect(renderer.root.findByProps({ testID: 'sign-up-submit' }).props.disabled).toBe(true)

    await act(async () => {
      resolveOAuth?.('cancelled')
      await Promise.resolve()
    })

    expect(renderer.root.findByProps({ testID: 'signup-oauth-google' }).props.disabled).toBe(false)
    expect(() => renderer.root.findByProps({ testID: 'auth-error' })).toThrow()
  })

  it('renders a localized fail-closed error without removing email sign-up', async () => {
    mockSignInWithOAuthProvider.mockRejectedValue(new Error('raw provider secret'))
    const renderer = await renderScreen()

    await act(async () => {
      renderer.root.findByProps({ testID: 'sign-up-terms' }).props.onPress()
    })
    await act(async () => {
      renderer.root.findByProps({ testID: 'signup-oauth-google' }).props.onPress()
      await Promise.resolve()
      await Promise.resolve()
    })

    const error = renderer.root.findByProps({ testID: 'auth-error' })
    expect(error.findAllByProps({ children: 'mobile.auth.oauthFailed' }).length).toBeGreaterThan(0)
    expect(error.findAllByProps({ children: 'raw provider secret' })).toHaveLength(0)
    expect(renderer.root.findByProps({ testID: 'sign-up-submit' })).toBeTruthy()
  })

  it('fails closed when capability discovery fails', async () => {
    mockGetAuthCapabilities.mockReset().mockRejectedValue(new Error('offline'))
    const renderer = await renderScreen()

    expect(() => renderer.root.findByProps({ testID: 'signup-oauth-google' })).toThrow()
    expect(renderer.root.findByProps({ testID: 'sign-up-submit' })).toBeTruthy()
  })

  it('never starts Google account creation before explicit terms acceptance', async () => {
    const renderer = await renderScreen()
    const button = renderer.root.findByProps({ testID: 'signup-oauth-google' })

    expect(button.props.disabled).toBe(true)
    await act(async () => {
      button.props.onPress()
      await Promise.resolve()
    })

    expect(mockSignInWithOAuthProvider).not.toHaveBeenCalled()
    expect(renderer.root.findByProps({ testID: 'auth-error' })).toBeTruthy()
  })

  it('opens both legal documents without accepting the terms on the user\'s behalf', async () => {
    const renderer = await renderScreen()

    await act(async () => {
      renderer.root.findByProps({ testID: 'sign-up-terms-link' }).props.onPress()
      await Promise.resolve()
    })
    await act(async () => {
      renderer.root.findByProps({ testID: 'sign-up-privacy-link' }).props.onPress()
      await Promise.resolve()
    })

    expect(Linking.openURL).toHaveBeenNthCalledWith(1, 'https://d3ro.chanpaca.net/terms/')
    expect(Linking.openURL).toHaveBeenNthCalledWith(2, 'https://d3ro.chanpaca.net/privacy/')
    expect(renderer.root.findByProps({ testID: 'sign-up-terms' }).props.accessibilityState)
      .toEqual({ checked: false, disabled: false })
    expect(renderer.root.findByProps({ testID: 'signup-oauth-google' }).props.disabled).toBe(true)
  })
})