import fs from 'fs'
import path from 'path'
import { beforeEach, describe, expect, it, vi } from 'vitest'
import { MouseButton, VK } from '@d3ro/core/keybinding'

type EffectFn = () => void | (() => void)
const effects: EffectFn[] = []

vi.mock('react', () => ({
  useEffect: (fn: EffectFn) => {
    effects.push(fn)
  },
}))

const {
  KeyBindingCaptureSession,
  resolveCapturePort,
  useKeyBindingCaptureSuspension,
} = await import('../../src/renderer/components/keybinding/keybinding-capture')
const { BROWSER_BUTTON_TO_MOUSE, NO_MODIFIERS, buildBinding, resolveKeyCode } = await import(
  '../../src/renderer/components/keybinding/keybinding-recording'
)

const PICKER = path.resolve(
  __dirname,
  '../../src/renderer/components/keybinding/KeyBindingPicker.tsx'
)

function fakePort() {
  const calls: string[] = []
  return {
    calls,
    port: {
      beginCapture: vi.fn(async () => {
        calls.push('begin')
      }),
      endCapture: vi.fn(async () => {
        calls.push('end')
      }),
    },
  }
}

describe('KeyBindingPicker — 녹화 중 전역 트리거 중단 (r3-23)', () => {
  beforeEach(() => {
    effects.length = 0
  })

  it('피커가 열려 있는 동안 캡처 억제 훅을 open 으로 건다', () => {
    const source = fs.readFileSync(PICKER, 'utf8')
    expect(source).toContain('useKeyBindingCaptureSuspension(open)')
    // 전역 on/off 는 hotkeyEnabled 를 저장하므로 캡처에 쓰면 안 된다.
    expect(source).not.toMatch(/keybinding\s*\.\s*setEnabled/)
  })

  it('열리면 beginCapture, 닫히거나 언마운트되면 endCapture 를 한 번씩 보낸다', () => {
    const { port, calls } = fakePort()
    useKeyBindingCaptureSuspension(true, () => port)
    expect(effects).toHaveLength(1)
    const cleanup = effects[0]()
    expect(calls).toEqual(['begin'])
    expect(typeof cleanup).toBe('function')
    if (typeof cleanup === 'function') cleanup()
    expect(calls).toEqual(['begin', 'end'])
  })

  it('닫혀 있으면 아무것도 보내지 않는다', () => {
    const { port, calls } = fakePort()
    useKeyBindingCaptureSuspension(false, () => port)
    const cleanup = effects[0]()
    expect(cleanup).toBeUndefined()
    expect(calls).toEqual([])
  })

  it('세션은 begin/end 를 중복 전송하지 않고 begin 없이 end 를 보내지 않는다', () => {
    const { port, calls } = fakePort()
    const session = new KeyBindingCaptureSession(port)
    session.end()
    session.begin()
    session.begin()
    expect(session.isActive).toBe(true)
    session.end()
    session.end()
    expect(session.isActive).toBe(false)
    expect(calls).toEqual(['begin', 'end'])
  })

  it('IPC 실패는 녹화를 막지 않는다', async () => {
    const session = new KeyBindingCaptureSession({
      beginCapture: () => Promise.reject(new Error('no handler')),
      endCapture: () => Promise.reject(new Error('no handler')),
    })
    expect(() => {
      session.begin()
      session.end()
    }).not.toThrow()
    await Promise.resolve()
  })

  it('포트가 없으면(null) 조용히 아무것도 하지 않는다', () => {
    const session = new KeyBindingCaptureSession(null)
    session.begin()
    expect(session.isActive).toBe(false)
  })

  it('preload API 구조로 포트를 판별한다', () => {
    expect(resolveCapturePort(undefined)).toBeNull()
    expect(resolveCapturePort({ setEnabled: () => undefined })).toBeNull()
    expect(resolveCapturePort({ beginCapture: () => undefined })).toBeNull()

    const begin = vi.fn(() => Promise.resolve({ success: true }))
    const end = vi.fn(() => Promise.resolve({ success: true }))
    const port = resolveCapturePort({ beginCapture: begin, endCapture: end })
    expect(port).not.toBeNull()
    void port?.beginCapture()
    void port?.endCapture()
    expect(begin).toHaveBeenCalledTimes(1)
    expect(end).toHaveBeenCalledTimes(1)
  })
})

describe('keybinding-recording — 추출된 녹화 규칙 (동작 보존)', () => {
  it('좌/우 수정자를 location 으로 구분한다', () => {
    expect(resolveKeyCode({ keyCode: 17, which: 17, location: 1 })).toBe(VK.CtrlLeft)
    expect(resolveKeyCode({ keyCode: 17, which: 17, location: 2 })).toBe(VK.CtrlRight)
    expect(resolveKeyCode({ keyCode: 16, which: 16, location: 2 })).toBe(VK.ShiftRight)
    expect(resolveKeyCode({ keyCode: 18, which: 18, location: 1 })).toBe(VK.AltLeft)
    expect(resolveKeyCode({ keyCode: 93, which: 93, location: 2 })).toBe(VK.MetaRight)
    expect(resolveKeyCode({ keyCode: 93, which: 93, location: 0 })).toBe(93)
    expect(resolveKeyCode({ keyCode: 0, which: 65, location: 0 })).toBe(65)
  })

  it('주 키는 비수정자 키, 없으면 마지막 수정자', () => {
    expect(buildBinding([], NO_MODIFIERS)).toBeNull()
    const combo = buildBinding([VK.CtrlLeft, 65], { ...NO_MODIFIERS, ctrl: true })
    expect(combo).toMatchObject({ device: 'keyboard', code: 65, ctrl: true })
    const mods = buildBinding([VK.CtrlLeft, VK.AltRight], { ...NO_MODIFIERS, ctrl: true })
    expect(mods?.code).toBe(VK.AltRight)
  })

  it('브라우저 마우스 버튼을 uiohook 코드로 옮긴다', () => {
    expect(BROWSER_BUTTON_TO_MOUSE[1]).toBe(MouseButton.Middle)
    expect(BROWSER_BUTTON_TO_MOUSE[2]).toBe(MouseButton.Right)
    expect(BROWSER_BUTTON_TO_MOUSE[3]).toBe(MouseButton.Back)
    expect(BROWSER_BUTTON_TO_MOUSE[4]).toBe(MouseButton.Forward)
  })
})