/** @jest-environment node */

import { mkdtemp, mkdir, readFile, rename, rm, writeFile } from 'fs/promises'
import os from 'os'
import path from 'path'

import {
  recoverMaterialUploadConsumptionJournal,
  removeMaterialUploadConsumptionJournal,
  writeMaterialUploadConsumptionJournal,
} from '@/lib/material-upload-consumption-journal'

describe('普通素材上传消费 journal', () => {
  let uploadRoot = ''
  const previousUploadDir = process.env.UPLOAD_DIR

  beforeEach(async () => {
    uploadRoot = await mkdtemp(path.join(os.tmpdir(), 'material-upload-journal-'))
    process.env.UPLOAD_DIR = uploadRoot
  })

  afterEach(async () => {
    if (previousUploadDir === undefined) {
      delete process.env.UPLOAD_DIR
    } else {
      process.env.UPLOAD_DIR = previousUploadDir
    }
    await rm(uploadRoot, { recursive: true, force: true })
  })

  test('rename 后模拟进程退出，重启读取 journal 能找回同一正式源', async () => {
    const uploadId = 'upload-crash-recovery'
    const sessionDirectory = path.join(uploadRoot, 'temp', uploadId)
    const mergedPath = path.join(sessionDirectory, 'merged-source.mp4')
    const finalPath = path.join(uploadRoot, 'video-crash-recovery.mp4')
    await mkdir(sessionDirectory, { recursive: true })
    await writeFile(mergedPath, Buffer.from('video-source'))

    const record = await writeMaterialUploadConsumptionJournal({
      uploadId,
      ownerId: 'user-1',
      mergedPath,
      finalPath,
      storedFinalPath: finalPath,
      fileName: 'video-crash-recovery.mp4',
      size: Buffer.byteLength('video-source'),
    })
    // 故障注入点：rename 已成功，但还没有任何 Material 数据库记录。
    await rename(mergedPath, finalPath)

    const recovered = await recoverMaterialUploadConsumptionJournal({
      uploadId,
      ownerId: 'user-1',
    })

    expect(recovered).toEqual({
      record,
      sourcePath: finalPath,
      sourceLocation: 'final',
    })
    expect(await readFile(recovered!.sourcePath, 'utf8')).toBe('video-source')
  })

  test('owner 不匹配时不能发现或消费其他用户的恢复记录', async () => {
    const uploadId = 'upload-owner-scope'
    const sessionDirectory = path.join(uploadRoot, 'temp', uploadId)
    const mergedPath = path.join(sessionDirectory, 'merged-source.zip')
    const finalPath = path.join(uploadRoot, 'material-owner-scope.zip')
    await mkdir(sessionDirectory, { recursive: true })
    await writeFile(mergedPath, Buffer.from('archive'))
    await writeMaterialUploadConsumptionJournal({
      uploadId,
      ownerId: 'user-1',
      mergedPath,
      finalPath,
      storedFinalPath: finalPath,
      fileName: 'material-owner-scope.zip',
      size: Buffer.byteLength('archive'),
    })

    await expect(recoverMaterialUploadConsumptionJournal({
      uploadId,
      ownerId: 'user-2',
    })).resolves.toBeNull()
  })

  test('正式源大小变化时拒绝恢复并保留 journal 供人工核验', async () => {
    const uploadId = 'upload-size-mismatch'
    const sessionDirectory = path.join(uploadRoot, 'temp', uploadId)
    const mergedPath = path.join(sessionDirectory, 'merged-source.zip')
    const finalPath = path.join(uploadRoot, 'material-size-mismatch.zip')
    await mkdir(sessionDirectory, { recursive: true })
    await writeFile(mergedPath, Buffer.from('archive'))
    await writeMaterialUploadConsumptionJournal({
      uploadId,
      ownerId: 'user-1',
      mergedPath,
      finalPath,
      storedFinalPath: finalPath,
      fileName: 'material-size-mismatch.zip',
      size: Buffer.byteLength('archive'),
    })
    await rename(mergedPath, finalPath)
    await writeFile(finalPath, Buffer.from('changed-size'))

    await expect(recoverMaterialUploadConsumptionJournal({
      uploadId,
      ownerId: 'user-1',
    })).rejects.toThrow('上传源文件恢复记录异常')
    await expect(removeMaterialUploadConsumptionJournal({
      uploadId,
      ownerId: 'user-1',
      expectedFinalPath: finalPath,
    })).resolves.toBe(true)
  })
})