import React from 'react'
import { act, create, type ReactTestRenderer } from 'react-test-renderer'
import type { HistoryEntry, UserTemplate } from '@d3ro/api-client'

const mockLoadTemplateLibrary = jest.fn()
const mockSelectTemplate = jest.fn()
const mockSearchMemos = jest.fn()
const mockAddMemoTag = jest.fn()

jest.mock('@react-navigation/native', () => ({ useIsFocused: () => true }))
jest.mock('react-native-safe-area-context', () => ({ useSafeAreaInsets: () => ({ top: 0, bottom: 0, left: 0, right: 0 }) }))
jest.mock('@d3ro/i18n', () => ({
  useI18n: () => ({
    t: (key: string, params?: Record<string, unknown>) => params === undefined
      ? key
      : `${key}:${JSON.stringify(params)}`,
    formatDate: () => '2026-08-21',
  }),
}))
jest.mock('../src/lib/auth-context', () => ({
  useAuth: () => ({
    user: { id: '11111111-1111-4111-8111-111111111111' },
    session: null,
    loading: false,
  }),
}))
jest.mock('../src/lib/preferences-context', () => ({
  useMobilePreferences: () => ({
    palette: {
      bg: { app: '#000', sidebar: '#111', card: '#181818', inset: '#202020' },
      text: { primary: '#fff', muted: '#999' },
      border: { default: '#444', subtle: '#333' },
      accent: { main: '#7cf', dim: '#234' },
      tag: { red: '#f66' },
    },
  }),
}))
jest.mock('../src/theme/themed-components', () => {
  const ReactValue = require('react') as typeof React
  const { Pressable, Text, View } = require('react-native') as typeof import('react-native')
  return {
    ThemeText: ({ children, ...props }: React.PropsWithChildren<Record<string, unknown>>) => (
      <Text {...props}>{children}</Text>
    ),
    ThemeCard: ({ children, ...props }: React.PropsWithChildren<Record<string, unknown>>) => (
      <View {...props}>{children}</View>
    ),
    ThemeButton: ({
      label,
      onPress,
      disabled,
      ...props
    }: {
      label: string
      onPress?: () => void
      disabled?: boolean
      [key: string]: unknown
    }) => (
      <Pressable {...props} disabled={disabled} onPress={onPress}>
        <Text>{label}</Text>
      </Pressable>
    ),
    __ReactValue: ReactValue,
  }
})
jest.mock('../src/features/templates', () => {
  class MockTemplateServiceError extends Error {
    code: string

    constructor(mockCode: string, mockMessage: string) {
      super(mockMessage)
      this.code = mockCode
    }
  }
  return {
    TemplateServiceError: MockTemplateServiceError,
    loadTemplateLibrary: (...args: unknown[]) => mockLoadTemplateLibrary(...args),
    selectTemplate: (...args: unknown[]) => mockSelectTemplate(...args),
    subscribeToTemplates: () => ({ unsubscribe: async () => undefined }),
    createTemplate: jest.fn(),
    updateTemplate: jest.fn(),
    deleteTemplate: jest.fn(),
    normalizeTemplateDraft: jest.fn(() => ({})),
  }
})
jest.mock('../src/features/memos', () => {
  class MockMemoServiceError extends Error {
    code: string

    constructor(mockCode: string, mockMessage: string) {
      super(mockMessage)
      this.code = mockCode
    }
  }
  const normalizeMemoTag = (value: string) => {
    const tag = value.trim().replace(/\s+/g, ' ')
    if (tag.length === 0) throw new MockMemoServiceError('validation', 'invalid')
    return { tag, normalizedTag: tag.toLowerCase() }
  }
  return {
    MemoServiceError: MockMemoServiceError,
    normalizeMemoTag,
    searchMemos: (...args: unknown[]) => mockSearchMemos(...args),
    addMemoTag: (...args: unknown[]) => mockAddMemoTag(...args),
    removeMemoTag: jest.fn(async () => undefined),
    renameMemoTag: jest.fn(async () => 1),
    buildMemoShareText: jest.fn(() => 'share'),
    subscribeToMemoTags: () => ({ unsubscribe: async () => undefined }),
  }
})

import TemplatesScreen from '../src/screens/TemplatesScreen'
import MemosScreen from '../src/screens/MemosScreen'
import { TemplateServiceError } from '../src/features/templates'
import { MemoServiceError } from '../src/features/memos'

const USER_ID = '11111111-1111-4111-8111-111111111111'

function template(): UserTemplate {
  return {
    id: 'aaaaaaaa-aaaa-4aaa-8aaa-aaaaaaaaaaaa',
    user_id: USER_ID,
    template_kind: 'dictation',
    builtin_key: 'builtin-email',
    name: 'Email',
    description: 'Email template',
    fields: [{ id: 'body', name: 'body', label: 'Body', promptText: 'Body?', required: true, maxDurationSec: 120 }],
    output_format: '{{body}}',
    template_type: null,
    system_prompt: null,
    is_builtin: true,
    revision: 1,
    created_at: '2026-08-21T00:00:00.000Z',
    updated_at: '2026-08-21T00:00:00.000Z',
  }
}

function history(): HistoryEntry {
  return {
    id: 'bbbbbbbb-bbbb-4bbb-8bbb-bbbbbbbbbbbb',
    user_id: USER_ID,
    title: 'Launch note',
    original_text: 'Ship after checks',
    polished_text: null,
    focused_app: null,
    focused_app_name: null,
    focused_app_window_title: null,
    mode: 'dictation',
    status: 'completed',
    error_code: null,
    audio_storage_key: null,
    duration: 1,
    detected_language: 'en',
    mic_device: null,
    word_count: 3,
    stt_model: null,
    llm_model: null,
    stt_latency_ms: null,
    llm_latency_ms: null,
    app_version: '1.0.0',
    summary_text: null,
    is_favorite: false,
    revision: 1,
    created_at: '2026-08-21T00:00:00.000Z',
    updated_at: '2026-08-21T00:00:00.000Z',
  }
}

async function flush(): Promise<void> {
  await act(async () => {
    await Promise.resolve()
    await Promise.resolve()
  })
}

describe('template and memo screens', () => {
  beforeEach(() => {
    mockLoadTemplateLibrary.mockReset()
    mockSelectTemplate.mockReset()
    mockSearchMemos.mockReset()
    mockAddMemoTag.mockReset()
  })

  it('renders template loading data and rolls an optimistic selection back on conflict', async () => {
    mockLoadTemplateLibrary.mockResolvedValue({ templates: [template()], selections: {} })
    mockSelectTemplate.mockRejectedValue(new TemplateServiceError('conflict', 'conflict'))
    let renderer: ReactTestRenderer
    await act(async () => {
      renderer = create(<TemplatesScreen />)
    })
    await flush()
    expect(renderer!.root.findByProps({ testID: `template-${template().id}` })).toBeTruthy()

    await act(async () => {
      renderer!.root.findByProps({ testID: `template-select-${template().id}` }).props.onPress()
      await Promise.resolve()
    })
    await flush()
    expect(mockSelectTemplate).toHaveBeenCalledTimes(1)
    const text = renderer!.root.findAllByType(require('react-native').Text)
      .map((node) => node.props.children).flat().join(' ')
    expect(text).toContain('mobile.templates.error.conflict')
    expect(text).not.toContain('mobile.templates.selected')
    await act(async () => renderer!.unmount())
  })

  it('renders memo data and rolls an optimistic tag create back when the server rejects it', async () => {
    mockSearchMemos.mockResolvedValue({
      items: [{ history: history(), tags: [] }],
      tagSummaries: [],
    })
    mockAddMemoTag.mockRejectedValue(new MemoServiceError('network', 'offline'))
    let renderer: ReactTestRenderer
    await act(async () => {
      renderer = create(<MemosScreen />)
    })
    await flush()
    const memoId = history().id
    await act(async () => {
      renderer!.root.findByProps({ testID: `memo-add-tag-${memoId}` }).props.onPress()
    })
    const editor = renderer!.root.findByProps({ testID: `memo-tag-editor-${memoId}` })
    const input = editor.findByType(require('react-native').TextInput)
    await act(async () => input.props.onChangeText('Launch'))
    await act(async () => {
      renderer!.root.findByProps({ testID: `memo-tag-save-${memoId}` }).props.onPress()
      await Promise.resolve()
    })
    await flush()
    expect(mockAddMemoTag).toHaveBeenCalledWith(USER_ID, memoId, 'Launch')
    const text = renderer!.root.findAllByType(require('react-native').Text)
      .map((node) => node.props.children).flat().join(' ')
    expect(text).toContain('mobile.memos.error.network')
    expect(text).not.toContain('#Launch')
    await act(async () => renderer!.unmount())
  })
})