// tests/unit/stt-model-download-redteam-r3-24.test.ts
// STT 탭 모델 다운로드가 실패/취소로 끝나도 '다운로드 중 (x%)' 에 멈추지 않는지 회귀 검증.

import { describe, it, expect } from 'vitest'
import { readFileSync } from 'node:fs'
import { join } from 'node:path'
import { ErrorCode, ipcError, ipcSuccess, type IPCResult } from '@d3ro/core/errors'
import {
  classifyModelDownloadResult,
  releaseIfCurrent,
  runModelDownload,
  type ModelDownloadView,
} from '../../src/renderer/components/stt/modelDownload'

/** STTTab 의 downloadingModelId / downloadError 상태를 흉내 내는 가짜 view */
function fakeView(): ModelDownloadView & {
  downloadingModelId: string | null
  error: { modelId: string; message: string } | null
  events: string[]
} {
  const state = {
    downloadingModelId: null as string | null,
    error: null as { modelId: string; message: string } | null,
    events: [] as string[],
  }
  return Object.assign(state, {
    started: (id: string) => {
      state.events.push(`started:${id}`)
      state.error = null
      state.downloadingModelId = id
    },
    succeeded: (id: string) => {
      state.events.push(`succeeded:${id}`)
      state.downloadingModelId = releaseIfCurrent(state.downloadingModelId, id)
    },
    cancelled: (id: string) => {
      state.events.push(`cancelled:${id}`)
      state.downloadingModelId = releaseIfCurrent(state.downloadingModelId, id)
    },
    failed: (id: string, message: string) => {
      state.events.push(`failed:${id}`)
      state.downloadingModelId = releaseIfCurrent(state.downloadingModelId, id)
      state.error = { modelId: id, message }
    },
  })
}

describe('runModelDownload', () => {
  it('ipcError(사이드카 기동 실패 등)면 진행 표시를 풀고 오류 메시지를 노출한다', async () => {
    const view = fakeView()
    const outcome = await runModelDownload(
      'large-v3-turbo',
      { download: async () => ipcError<void>(ErrorCode.STTModelDownloadFailed, '다운로드 시작 실패 (HTTP 500): boom') },
      view,
    )
    expect(outcome).toEqual({ kind: 'failed', message: '다운로드 시작 실패 (HTTP 500): boom' })
    expect(view.downloadingModelId).toBeNull()
    expect(view.error).toEqual({ modelId: 'large-v3-turbo', message: '다운로드 시작 실패 (HTTP 500): boom' })
  })

  it('취소 결과는 오류 없이 진행 표시만 푼다', async () => {
    const view = fakeView()
    const outcome = await runModelDownload(
      'small',
      { download: async () => ipcError<void>(ErrorCode.STTModelDownloadCancelled, '모델 다운로드 취소: small') },
      view,
    )
    expect(outcome.kind).toBe('cancelled')
    expect(view.downloadingModelId).toBeNull()
    expect(view.error).toBeNull()
  })

  it('invoke 자체가 reject 되어도 진행 표시를 푼다', async () => {
    const view = fakeView()
    const outcome = await runModelDownload(
      'small',
      { download: async () => { throw new Error('ipc channel closed') } },
      view,
    )
    expect(outcome).toEqual({ kind: 'failed', message: 'ipc channel closed' })
    expect(view.downloadingModelId).toBeNull()
  })

  it('성공하면 succeeded 로 끝나고 오류가 없다', async () => {
    const view = fakeView()
    const outcome = await runModelDownload('small', { download: async () => ipcSuccess(undefined) }, view)
    expect(outcome.kind).toBe('succeeded')
    expect(view.events).toEqual(['started:small', 'succeeded:small'])
    expect(view.downloadingModelId).toBeNull()
    expect(view.error).toBeNull()
  })

  it('늦게 도착한 A 실패가 그 사이 시작한 B 의 진행 표시를 지우지 않는다', async () => {
    const view = fakeView()
    let failA: (r: IPCResult<void>) => void = () => undefined
    const pendingA = runModelDownload(
      'A',
      { download: () => new Promise<IPCResult<void>>((resolve) => { failA = resolve }) },
      view,
    )
    view.started('B')
    failA(ipcError<void>(ErrorCode.STTModelDownloadFailed, 'A failed'))
    await pendingA
    expect(view.downloadingModelId).toBe('B')
  })
})

describe('classifyModelDownloadResult', () => {
  it('실패 코드별 결말', () => {
    expect(classifyModelDownloadResult(ipcSuccess(undefined))).toEqual({ kind: 'succeeded' })
    expect(classifyModelDownloadResult(ipcError(ErrorCode.STTModelDownloadCancelled, 'x'))).toEqual({ kind: 'cancelled' })
    expect(classifyModelDownloadResult(ipcError(ErrorCode.STTModelDownloadFailed, 'y'))).toEqual({
      kind: 'failed',
      message: 'y',
    })
    expect(classifyModelDownloadResult({ thrown: 'raw' })).toEqual({ kind: 'failed', message: 'raw' })
  })
})

describe('STTTab wiring', () => {
  it('handleDownloadModel 이 IPC 결과를 버리지 않고 runModelDownload 로 처리한다', () => {
    const src = readFileSync(
      join(__dirname, '../../src/renderer/components/STTTab.tsx'),
      'utf8',
    )
    expect(src).toContain('await runModelDownload(')
    expect(src).not.toMatch(/await window\.electronAPI\.stt\.downloadModel\(\{ modelId \}\)\s*\n\s*\}, \[\]\)/)
  })
})