/* eslint-disable @typescript-eslint/no-unused-expressions,@typescript-eslint/require-await */

import 'mocha'
import * as chai from 'chai'
import { pathExists, readdir, stat } from 'fs-extra'
import { join } from 'path'
import {
  buildAbsoluteFixturePath,
  cleanupTests,
  createSingleServer,
  PeerTubeServer,
  setAccessTokensToServers,
  setDefaultVideoChannel
} from '@shared/extra-utils'
import { HttpStatusCode, VideoPrivacy } from '@shared/models'

const expect = chai.expect

// Most classic resumable upload tests are done in other test suites

describe('Test resumable upload', function () {
  const defaultFixture = 'video_short.mp4'
  let server: PeerTubeServer
  let rootId: number

  async function buildSize (fixture: string, size?: number) {
    if (size !== undefined) return size

    const baseFixture = buildAbsoluteFixturePath(fixture)
    return (await stat(baseFixture)).size
  }

  async function prepareUpload (sizeArg?: number) {
    const size = await buildSize(defaultFixture, sizeArg)

    const attributes = {
      name: 'video',
      channelId: server.store.channel.id,
      privacy: VideoPrivacy.PUBLIC,
      fixture: defaultFixture
    }

    const mimetype = 'video/mp4'

    const res = await server.videos.prepareResumableUpload({ attributes, size, mimetype })

    return res.header['location'].split('?')[1]
  }

  async function sendChunks (options: {
    pathUploadId: string
    size?: number
    expectedStatus?: HttpStatusCode
    contentLength?: number
    contentRange?: string
    contentRangeBuilder?: (start: number, chunk: any) => string
  }) {
    const { pathUploadId, expectedStatus, contentLength, contentRangeBuilder } = options

    const size = await buildSize(defaultFixture, options.size)
    const absoluteFilePath = buildAbsoluteFixturePath(defaultFixture)

    return server.videos.sendResumableChunks({
      pathUploadId,
      videoFilePath: absoluteFilePath,
      size,
      contentLength,
      contentRangeBuilder,
      expectedStatus
    })
  }

  async function checkFileSize (uploadIdArg: string, expectedSize: number | null) {
    const uploadId = uploadIdArg.replace(/^upload_id=/, '')

    const subPath = join('tmp', 'resumable-uploads', uploadId)
    const filePath = server.servers.buildDirectory(subPath)
    const exists = await pathExists(filePath)

    if (expectedSize === null) {
      expect(exists).to.be.false
      return
    }

    expect(exists).to.be.true

    expect((await stat(filePath)).size).to.equal(expectedSize)
  }

  async function countResumableUploads () {
    const subPath = join('tmp', 'resumable-uploads')
    const filePath = server.servers.buildDirectory(subPath)

    const files = await readdir(filePath)
    return files.length
  }

  before(async function () {
    this.timeout(30000)

    server = await createSingleServer(1)
    await setAccessTokensToServers([ server ])
    await setDefaultVideoChannel([ server ])

    const body = await server.users.getMyInfo()
    rootId = body.id

    await server.users.update({ userId: rootId, videoQuota: 10_000_000 })
  })

  describe('Directory cleaning', function () {

    it('Should correctly delete files after an upload', async function () {
      const uploadId = await prepareUpload()
      await sendChunks({ pathUploadId: uploadId })

      expect(await countResumableUploads()).to.equal(0)
    })

    it('Should not delete files after an unfinished upload', async function () {
      await prepareUpload()

      expect(await countResumableUploads()).to.equal(2)
    })

    it('Should not delete recent uploads', async function () {
      await server.debug.sendCommand({ body: { command: 'remove-dandling-resumable-uploads' } })

      expect(await countResumableUploads()).to.equal(2)
    })

    it('Should delete old uploads', async function () {
      await server.debug.sendCommand({ body: { command: 'remove-dandling-resumable-uploads' } })

      expect(await countResumableUploads()).to.equal(0)
    })
  })

  describe('Resumable upload and chunks', function () {

    it('Should accept the same amount of chunks', async function () {
      const uploadId = await prepareUpload()
      await sendChunks({ pathUploadId: uploadId })

      await checkFileSize(uploadId, null)
    })

    it('Should not accept more chunks than expected', async function () {
      const size = 100
      const uploadId = await prepareUpload(size)

      await sendChunks({ pathUploadId: uploadId, expectedStatus: HttpStatusCode.CONFLICT_409 })
      await checkFileSize(uploadId, 0)
    })

    it('Should not accept more chunks than expected with an invalid content length/content range', async function () {
      const uploadId = await prepareUpload(1500)

      await sendChunks({ pathUploadId: uploadId, expectedStatus: HttpStatusCode.BAD_REQUEST_400, contentLength: 1000 })
      await checkFileSize(uploadId, 0)
    })

    it('Should not accept more chunks than expected with an invalid content length', async function () {
      const uploadId = await prepareUpload(500)

      const size = 1000

      const contentRangeBuilder = start => `bytes ${start}-${start + size - 1}/${size}`
      await sendChunks({ pathUploadId: uploadId, expectedStatus: HttpStatusCode.BAD_REQUEST_400, contentRangeBuilder, contentLength: size })
      await checkFileSize(uploadId, 0)
    })
  })

  after(async function () {
    await cleanupTests([ server ])
  })
})