// tests/main/services/textinsert-redteam-r2-4.test.ts
// 회귀: nut-js 기본 autoDelay(300ms)가 그대로 남아 붙여넣기마다 Ctrl 이 ~300ms 눌린 채
// 유지되고(사용자의 다음 키가 Ctrl 단축키가 됨), 키보드 삽입이 글자당 300ms 걸리던 버그.
// 실제 nut-js KeyboardClass 를 가짜 네이티브 provider 위에 올려 검증한다 (키는 실제로 눌리지 않는다).

import { describe, it, expect, vi } from 'vitest'
import { KeyboardClass } from '@nut-tree-fork/nut-js/dist/lib/keyboard.class'
import { Key } from '@nut-tree-fork/shared'
import {
  NutKeyboardPort,
  NUT_KEY_DELAY_MS,
  configureNutKeyDelay,
  type NutKeyboardModule
} from '../../../src/main/services/text-insert/nut-keyboard-port'
import { TextInsertService } from '../../../src/main/services/TextInsertService'
import type { ClipboardImage, ClipboardPort } from '../../../src/main/services/text-insert/clipboard-snapshot'
import { ErrorCode } from '@d3ro/core/errors'

type ProviderRegistryArg = ConstructorParameters<typeof KeyboardClass>[0]

type NativeEvent =
  | { kind: 'type'; char: string }
  | { kind: 'click'; keys: Key[] }
  | { kind: 'press'; keys: Key[] }
  | { kind: 'release'; keys: Key[] }

/** libnut 대신 이벤트만 기록하는 가짜 provider registry. */
class FakeRegistry {
  events: NativeEvent[] = []
  nativeDelays: number[] = []
  private readonly _log = { debug: vi.fn(), info: vi.fn(), error: vi.fn(), warn: vi.fn(), trace: vi.fn() }
  private readonly _keyboard = {
    setKeyboardDelay: (delay: number): void => {
      this.nativeDelays.push(delay)
    },
    type: async (char: string): Promise<void> => {
      this.events.push({ kind: 'type', char })
    },
    click: async (...keys: Key[]): Promise<void> => {
      this.events.push({ kind: 'click', keys })
    },
    pressKey: async (...keys: Key[]): Promise<void> => {
      this.events.push({ kind: 'press', keys })
    },
    releaseKey: async (...keys: Key[]): Promise<void> => {
      this.events.push({ kind: 'release', keys })
    }
  }

  hasKeyboard(): boolean {
    return true
  }
  getKeyboard(): typeof this._keyboard {
    return this._keyboard
  }
  getLogProvider(): typeof this._log {
    return this._log
  }
}

function makeNut(): { nut: NutKeyboardModule; registry: FakeRegistry; keyboard: KeyboardClass } {
  const registry = new FakeRegistry()
  const keyboard = new KeyboardClass(registry as unknown as ProviderRegistryArg)
  return { nut: { keyboard, providerRegistry: registry, Key }, registry, keyboard }
}

async function timed(fn: () => Promise<unknown>): Promise<number> {
  const start = performance.now()
  await fn()
  return performance.now() - start
}

describe('NutKeyboardPort key delay (redteam r2-4)', () => {
  it('real nut-js KeyboardClass starts with a 300ms autoDelay (the hazard being fixed)', () => {
    const { keyboard, registry } = makeNut()
    expect(keyboard.config.autoDelayMs).toBe(300)
    expect(registry.nativeDelays).toEqual([300])
  })

  it('zeroes both the JS autoDelay and the native keyboard delay on load', async () => {
    const { nut, registry, keyboard } = makeNut()
    const port = new NutKeyboardPort('win32', async () => nut)

    await port.paste()

    expect(NUT_KEY_DELAY_MS).toBe(0)
    expect(keyboard.config.autoDelayMs).toBe(0)
    expect(registry.nativeDelays.at(-1)).toBe(0)
  })

  it('sends Ctrl+V as a single native chord without holding the modifier across awaits', async () => {
    const { nut, registry } = makeNut()
    const port = new NutKeyboardPort('win32', async () => nut)

    const elapsed = await timed(() => port.paste())

    expect(registry.events).toEqual([{ kind: 'click', keys: [Key.LeftControl, Key.V] }])
    expect(registry.events.some((e) => e.kind === 'press' || e.kind === 'release')).toBe(false)
    // 수정 전: pressKey·releaseKey 앞에서 각각 300ms → 600ms 이상
    expect(elapsed).toBeLessThan(150)
  })

  it('uses the Super (⌘) modifier on macOS', async () => {
    const { nut, registry } = makeNut()
    const port = new NutKeyboardPort('darwin', async () => nut)

    await port.paste()

    expect(registry.events).toEqual([{ kind: 'click', keys: [Key.LeftSuper, Key.V] }])
  })

  it('types a 60-character text without per-character 300ms sleeps', async () => {
    const { nut, registry } = makeNut()
    const port = new NutKeyboardPort('win32', async () => nut)
    const text = '가나다라마바사아자차카타파하 hello world, this is a suggestion!!'.padEnd(60, '.')

    const elapsed = await timed(() => port.type(text))

    // 글자마다 JS sleep 을 끼우는 KeyboardClass.type 대신 네이티브 호출 한 번
    expect(registry.events).toEqual([{ kind: 'type', char: text }])
    // 수정 전: 60 × 300ms = 18s
    expect(elapsed).toBeLessThan(150)
  })

  it('loads nut-js once and reuses it', async () => {
    const { nut } = makeNut()
    const load = vi.fn(async () => nut)
    const port = new NutKeyboardPort('win32', load)

    await Promise.all([port.paste(), port.type('a'), port.paste()])

    expect(load).toHaveBeenCalledTimes(1)
  })

  it('does not touch the keyboard for empty text', async () => {
    const { nut, registry } = makeNut()
    const load = vi.fn(async () => nut)
    const port = new NutKeyboardPort('win32', load)

    await port.type('')

    expect(load).not.toHaveBeenCalled()
    expect(registry.events).toEqual([])
  })

  it('fails with TextInsertKeySimulationFailed when no native keyboard provider is registered', async () => {
    const { nut, registry } = makeNut()
    const port = new NutKeyboardPort('win32', async () => ({
      ...nut,
      providerRegistry: { hasKeyboard: () => false, getKeyboard: () => registry.getKeyboard() }
    }))

    await expect(port.paste()).rejects.toMatchObject({ code: ErrorCode.TextInsertKeySimulationFailed })
  })

  it('maps a load failure to TextInsertKeySimulationFailed', async () => {
    const port = new NutKeyboardPort('win32', async () => {
      throw new Error('native module missing')
    })

    await expect(port.paste()).rejects.toMatchObject({ code: ErrorCode.TextInsertKeySimulationFailed })
  })

  it('configureNutKeyDelay skips the native delay when no keyboard provider is registered', () => {
    const { nut, keyboard } = makeNut()
    const setKeyboardDelay = vi.fn()
    const noProvider: NutKeyboardModule = {
      ...nut,
      providerRegistry: {
        hasKeyboard: () => false,
        getKeyboard: () => ({ setKeyboardDelay, type: vi.fn(), click: vi.fn() })
      }
    }

    configureNutKeyDelay(noProvider, 5)

    expect(keyboard.config.autoDelayMs).toBe(5)
    expect(setKeyboardDelay).not.toHaveBeenCalled()
  })
})

describe('TextInsertService with the nut-js adapter (redteam r2-4)', () => {
  function memoryClipboard(): ClipboardPort<ClipboardImage> {
    let text = 'original'
    const empty: ClipboardImage = { isEmpty: () => true }
    return {
      availableFormats: () => (text ? ['text/plain'] : []),
      readText: () => text,
      readHTML: () => '',
      readRTF: () => '',
      readImage: () => empty,
      readBuffer: () => Buffer.alloc(0),
      writeText: (value: string) => {
        text = value
      },
      write: (data) => {
        text = data.text ?? ''
      },
      writeBuffer: () => undefined,
      clear: () => {
        text = ''
      }
    }
  }

  it('clipboard insert sends one paste chord and restores the clipboard', async () => {
    const { nut, registry } = makeNut()
    const clipboard = memoryClipboard()
    const service = new TextInsertService({
      clipboard,
      keyboard: new NutKeyboardPort('win32', async () => nut),
      sleep: async () => undefined,
      platform: 'win32'
    })

    const result = await service.insertText('dictated text')

    expect(result.method).toBe('clipboard')
    expect(registry.events).toEqual([{ kind: 'click', keys: [Key.LeftControl, Key.V] }])
    expect(clipboard.readText()).toBe('original')
    expect(result.durationMs).toBeLessThan(150)
  })

  it('keyboard insert finishes promptly instead of 300ms per character', async () => {
    const { nut, registry } = makeNut()
    const service = new TextInsertService({
      clipboard: memoryClipboard(),
      keyboard: new NutKeyboardPort('win32', async () => nut),
      sleep: async () => undefined,
      platform: 'win32'
    })
    const text = 'x'.repeat(60)

    const result = await service.insertText(text, 'keyboard')

    expect(result.method).toBe('keyboard')
    expect(registry.events).toEqual([{ kind: 'type', char: text }])
    expect(result.durationMs).toBeLessThan(150)
  })
})