// tests/unit/stt-tab-subscriptions-redteam-r1-8.test.ts
// STT 탭 언마운트 시 모든 진행률 구독이 해제되는지 (runtime:progress 리스너 누수 회귀).

import { describe, it, expect } from 'vitest'
import { readFileSync } from 'node:fs'
import { join } from 'node:path'
import { subscribeSttTabEvents } from '../../src/renderer/components/stt/sttTabSubscriptions'

type Listener = (event: number) => void

function fakeChannel(): { subscribe: (cb: Listener) => () => void; listeners: Set<Listener> } {
  const listeners = new Set<Listener>()
  return {
    listeners,
    subscribe: (cb) => {
      listeners.add(cb)
      return () => {
        listeners.delete(cb)
      }
    },
  }
}

describe('subscribeSttTabEvents', () => {
  it('마운트·언마운트를 반복해도 리스너가 쌓이지 않는다', () => {
    const download = fakeChannel()
    const runtime = fakeChannel()

    for (let mount = 0; mount < 12; mount += 1) {
      const cleanup = subscribeSttTabEvents(
        { onDownloadProgress: download.subscribe, onRuntimeProgress: runtime.subscribe },
        { onDownloadProgress: () => undefined, onRuntimeProgress: () => undefined },
      )
      expect(download.listeners.size).toBe(1)
      expect(runtime.listeners.size).toBe(1)
      cleanup()
    }

    expect(download.listeners.size).toBe(0)
    expect(runtime.listeners.size).toBe(0)
  })

  it('cleanup 을 두 번 불러도 안전하다 (StrictMode 이중 호출)', () => {
    const download = fakeChannel()
    const runtime = fakeChannel()
    const cleanup = subscribeSttTabEvents(
      { onDownloadProgress: download.subscribe, onRuntimeProgress: runtime.subscribe },
      { onDownloadProgress: () => undefined, onRuntimeProgress: () => undefined },
    )
    cleanup()
    expect(() => cleanup()).not.toThrow()
  })

  it('STTTab 은 진행률 이벤트를 이 헬퍼로만 구독한다 (개별 구독 + 누락된 해제 재발 방지)', () => {
    const source = readFileSync(
      join(__dirname, '../../src/renderer/components/STTTab.tsx'),
      'utf8',
    )
    expect(source).toContain('return subscribeSttTabEvents(')
    expect(source).not.toMatch(/const\s+unsub\w*\s*=\s*window\.electronAPI\.(stt|runtime)\.on/)
  })
})