import fs from 'fs'
import path from 'path'
import * as babel from '@babel/core'
import { parseComponent } from 'vue-template-compiler'
import { ACCEPT, formatFileSize, validateBackgroundFile } from '@/utils/teamBackgroundFile'

process.env.BROWSERSLIST_IGNORE_OLD_DATA = 'true'

const routerPath = path.resolve(__dirname, '../../src/router/index.js')
const pagePath = path.resolve(__dirname, '../../src/views/pages/team-background-upload.vue')

const readIfPresent = file => fs.existsSync(file) ? fs.readFileSync(file, 'utf8') : ''

function deferred() {
  let resolve
  let reject
  const promise = new Promise((resolvePromise, rejectPromise) => {
    resolve = resolvePromise
    reject = rejectPromise
  })
  return { promise, resolve, reject }
}

function transformModule(source) {
  return babel.transformSync(source, {
    babelrc: false,
    configFile: false,
    plugins: [require.resolve('@babel/plugin-transform-modules-commonjs')]
  }).code
}

function evaluateModule(source, mocks) {
  const code = transformModule(source)
  const module = { exports: {} }
  const localRequire = id => {
    if (Object.prototype.hasOwnProperty.call(mocks, id)) return mocks[id]
    throw new Error(`Missing test mock for ${id}`)
  }
  const evaluate = new Function('require', 'module', 'exports', code)
  evaluate(localRequire, module, module.exports)
  return module.exports
}

function loadRouter() {
  const http = { get: jest.fn(() => new Promise(() => {})) }
  const Vue = { use: jest.fn(), prototype: { $message: { error: jest.fn() } } }

  class Router {
    constructor(options) {
      this.options = options
      this.app = { $options: { store: { state: { sidebarMenuActiveName: [] } } } }
    }

    beforeEach(guard) {
      this.guard = guard
    }

    onError(handler) {
      this.errorHandler = handler
    }

    addRoutes() {}

    push() {
      return Promise.resolve()
    }
  }

  const previousWindow = global.window
  global.window = {
    SITE_CONFIG: {
      dynamicMenuRoutesHasAdded: false,
      dynamicRoutes: [],
      menuList: [],
      contentTabDefault: {}
    }
  }
  try {
    const exports = evaluateModule(readIfPresent(routerPath), {
      vue: Vue,
      'vue-router': Router,
      '@/utils/request': http
    })
    return { ...exports, http }
  } finally {
    global.window = previousWindow
  }
}

function expectPage(source) {
  expect(source).not.toBe('')
  return source !== ''
}

function loadPageOptions(api) {
  const source = readIfPresent(pagePath)
  const descriptor = parseComponent(source)
  return evaluateModule(descriptor.script.content, {
    '@/api/teamBackgroundFile': api,
    '@/utils/teamBackgroundFile': { ACCEPT, formatFileSize, validateBackgroundFile },
    '@/components/team-background/TeamBackgroundUploadQueue.vue': {}
  }).default
}

function createPageVm(api, overrides = {}) {
  const options = loadPageOptions(api)
  const vm = {
    ...options.data(),
    $route: { query: {} },
    $message: { error: jest.fn(), success: jest.fn() },
    $refs: { fileInput: { value: 'selected', click: jest.fn() } },
    ...options.methods,
    ...overrides
  }
  vm.$componentOptions = options
  return vm
}

function computed(vm, name) {
  return vm.$componentOptions.computed[name].call(vm)
}

describe('public team background upload route', () => {
  test('is a page route outside the authenticated layout and short-circuits before menu requests', () => {
    const { default: router, pageRoutes, moduleRoutes, http } = loadRouter()
    const route = pageRoutes.find(candidate => candidate.path === '/team-background-upload')
    const next = jest.fn()

    expect(route).toMatchObject({
      path: '/team-background-upload',
      name: 'team-background-upload',
      meta: { title: '上传团队背景资料', public: true }
    })
    expect(moduleRoutes.children.some(candidate => candidate.path === route.path)).toBe(false)

    router.guard({ path: route.path, matched: [{ meta: route.meta }] }, {}, next)

    expect(next).toHaveBeenCalledTimes(1)
    expect(next).toHaveBeenCalledWith()
    expect(http.get).not.toHaveBeenCalled()
  })
})

describe('public team background upload page state machine', () => {
  const source = readIfPresent(pagePath)
  let api

  beforeEach(() => {
    api = {
      completePublicUpload: jest.fn(),
      getPublicUploadSession: jest.fn(),
      uploadPublicTeamBackgroundFile: jest.fn(),
      verifyPublicUploadCode: jest.fn()
    }
  })

  afterEach(() => {
    jest.useRealTimers()
  })

  test('auto-validates a token and ignores its deferred result after expiry', async () => {
    if (!expectPage(source)) return
    const request = deferred()
    api.getPublicUploadSession.mockReturnValue(request.promise)
    const vm = createPageVm(api, { $route: { query: { token: 'link-token' } } })

    const loading = vm.$componentOptions.created.call(vm)
    expect(vm.state).toBe('verifying')
    expect(api.getPublicUploadSession).toHaveBeenCalledWith('link-token')

    vm.expireSession()
    request.resolve({ code: 0, data: { teamName: 'Alpha', uploadToken: 'upload-token', expiresAt: '2099-01-01T00:00:00Z' } })
    await loading

    expect(vm.state).toBe('expired')
    expect(vm.session).toBeNull()
  })

  test('shows code entry without a token and accepts exactly six ASCII digits', async () => {
    if (!expectPage(source)) return
    const request = deferred()
    api.verifyPublicUploadCode.mockReturnValue(request.promise)
    const vm = createPageVm(api)

    await vm.$componentOptions.created.call(vm)
    expect(vm.state).toBe('code')
    expect(api.getPublicUploadSession).not.toHaveBeenCalled()

    for (const invalidCode of ['12345', '1234567', '12345a', '１２３４５６']) {
      vm.code = invalidCode
      await vm.verifyCode()
    }
    expect(api.verifyPublicUploadCode).not.toHaveBeenCalled()
    expect(vm.$message.error).toHaveBeenCalledTimes(4)
    expect(vm.$message.error).toHaveBeenLastCalledWith('请输入6位数字验证码')

    vm.code = '123456'
    const verifying = vm.verifyCode()
    expect(vm.state).toBe('verifying')
    request.resolve({ code: 0, data: { teamName: 'Alpha', uploadToken: 'verified-token', expiresAt: '2099-01-01T00:00:00Z' } })
    await verifying

    expect(api.verifyPublicUploadCode).toHaveBeenCalledWith('123456')
    expect(vm.state).toBe('ready')
    expect(vm.session.uploadToken).toBe('verified-token')
    vm.$componentOptions.beforeDestroy.call(vm)
  })

  test('ignores a deferred code response after the page becomes expired', async () => {
    if (!expectPage(source)) return
    const request = deferred()
    api.verifyPublicUploadCode.mockReturnValue(request.promise)
    const vm = createPageVm(api, { code: '123456', state: 'code' })

    const verifying = vm.verifyCode()
    vm.expireSession()
    request.resolve({ code: 0, data: { teamName: 'Late', uploadToken: 'late-token', expiresAt: '2099-01-01T00:00:00Z' } })
    await verifying

    expect(vm.state).toBe('expired')
    expect(vm.session).toBeNull()
  })

  test('uses the fixed expiry for a one-second countdown and clears timers', () => {
    if (!expectPage(source)) return
    jest.useFakeTimers()
    jest.setSystemTime(new Date('2026-07-21T10:00:00.000Z'))
    const vm = createPageVm(api)

    vm.activateSession({ teamName: 'Alpha', uploadToken: 'upload-token', expiresAt: '2026-07-21T10:00:02.500Z' })
    expect(vm.remainingSeconds).toBe(2)
    expect(jest.getTimerCount()).toBe(1)

    jest.advanceTimersByTime(1000)
    expect(vm.remainingSeconds).toBe(1)
    jest.advanceTimersByTime(1000)
    expect(vm.remainingSeconds).toBe(0)
    expect(vm.state).toBe('expired')
    expect(jest.getTimerCount()).toBe(0)

    vm.activateSession({ teamName: 'Beta', uploadToken: 'other-token', expiresAt: '2026-07-21T10:01:00.000Z' })
    expect(jest.getTimerCount()).toBe(1)
    vm.$componentOptions.beforeDestroy.call(vm)
    expect(jest.getTimerCount()).toBe(0)
  })

  test('creates the exact queue shape and rejects more than ten files before enqueueing', async () => {
    if (!expectPage(source)) return
    const vm = createPageVm(api, { state: 'ready', session: { uploadToken: 'upload-token' } })
    const files = [{ name: 'one.pdf', size: 1 }, { name: 'two.docx', size: 2 }]
    const now = jest.spyOn(Date, 'now').mockReturnValue(123456)

    expect(vm.createQueueItems(files)).toEqual([
      { id: '123456-0', file: files[0], name: 'one.pdf', progress: 0, status: 'pending', error: '' },
      { id: '123456-1', file: files[1], name: 'two.docx', progress: 0, status: 'pending', error: '' }
    ])
    now.mockRestore()

    await vm.handleFileChange({ target: { files: Array.from({ length: 11 }, (_, index) => ({ name: `${index}.pdf`, size: 1 })) } })
    expect(vm.queue).toEqual([])
    expect(api.uploadPublicTeamBackgroundFile).not.toHaveBeenCalled()
    expect(vm.$message.error).toHaveBeenCalledWith('一次最多选择 10 个文件')
  })

  test('reports progress, retains independent results and retries only the failed item', async () => {
    if (!expectPage(source)) return
    const vm = createPageVm(api, { state: 'ready', session: { uploadToken: 'upload-token' } })
    const success = { id: '1-0', file: { name: 'ok.pdf', size: 1 }, name: 'ok.pdf', progress: 0, status: 'pending', error: '' }
    const failure = { id: '1-1', file: { name: 'retry.docx', size: 1 }, name: 'retry.docx', progress: 0, status: 'pending', error: '' }
    vm.queue = [success, failure]
    api.uploadPublicTeamBackgroundFile
      .mockImplementationOnce((_token, _file, onProgress) => {
        onProgress({ loaded: 1, total: 2 })
        return Promise.resolve({ code: 0, data: {} })
      })
      .mockRejectedValueOnce({ msg: '网络失败' })

    await vm.uploadOne(success)
    await vm.uploadOne(failure)

    expect(success).toMatchObject({ status: 'success', progress: 100, error: '' })
    expect(failure).toMatchObject({ status: 'failed', progress: 0, error: '网络失败' })
    expect(vm.queue).toEqual([success, failure])
    expect(api.uploadPublicTeamBackgroundFile.mock.calls[0]).toEqual([
      'upload-token',
      success.file,
      expect.any(Function)
    ])

    api.uploadPublicTeamBackgroundFile.mockImplementationOnce((_token, _file, onProgress) => {
      onProgress({ loaded: 3, total: 4 })
      expect(failure.progress).toBe(75)
      return Promise.resolve({ code: 0, data: {} })
    })
    await vm.retryUpload(failure)

    expect(success).toMatchObject({ status: 'success', progress: 100 })
    expect(failure).toMatchObject({ status: 'success', progress: 100, error: '' })
    expect(api.uploadPublicTeamBackgroundFile).toHaveBeenLastCalledWith('upload-token', failure.file, expect.any(Function))
  })

  test('a session-level upload failure expires the page and stops later files in the batch', async () => {
    if (!expectPage(source)) return
    api.uploadPublicTeamBackgroundFile.mockRejectedValue({ msg: '上传会话已过期' })
    const vm = createPageVm(api, { state: 'ready', session: { uploadToken: 'upload-token' } })
    const files = [{ name: 'one.pdf', size: 1 }, { name: 'two.pdf', size: 1 }]

    await vm.handleFileChange({ target: { files } })

    expect(api.uploadPublicTeamBackgroundFile).toHaveBeenCalledTimes(1)
    expect(vm.queue[0]).toMatchObject({ status: 'failed', error: '上传会话已过期' })
    expect(vm.queue[1]).toMatchObject({ status: 'pending' })
    expect(vm.state).toBe('expired')
  })

  test('late upload progress and success cannot overwrite expiry', async () => {
    if (!expectPage(source)) return
    const request = deferred()
    let onProgress
    api.uploadPublicTeamBackgroundFile.mockImplementation((_token, _file, callback) => {
      onProgress = callback
      return request.promise
    })
    const vm = createPageVm(api, { state: 'ready', session: { uploadToken: 'upload-token' } })
    const item = { id: '1-0', file: { name: 'slow.pdf', size: 1 }, name: 'slow.pdf', progress: 0, status: 'pending', error: '' }

    const uploading = vm.uploadOne(item)
    onProgress({ loaded: 1, total: 5 })
    expect(item.progress).toBe(20)
    vm.expireSession()
    onProgress({ loaded: 4, total: 5 })
    request.resolve({ code: 0, data: {} })
    await uploading

    expect(vm.state).toBe('expired')
    expect(item).toMatchObject({ status: 'uploading', progress: 20 })
  })

  test('completion uses only the upload token, counts successes and freezes further uploads', async () => {
    if (!expectPage(source)) return
    const request = deferred()
    api.completePublicUpload.mockReturnValue(request.promise)
    const vm = createPageVm(api, {
      state: 'ready',
      session: { uploadToken: 'upload-token' },
      queue: [
        { id: '1', status: 'success' },
        { id: '2', status: 'failed' },
        { id: '3', status: 'success' }
      ]
    })
    vm.uploadOne = jest.fn()

    expect(computed(vm, 'uploadDisabled')).toBe(false)
    const completing = vm.completeUpload()
    expect(vm.completing).toBe(true)
    expect(computed(vm, 'uploadDisabled')).toBe(true)
    request.resolve({ code: 0 })
    await completing

    expect(api.completePublicUpload).toHaveBeenCalledWith('upload-token')
    expect(vm.successCount).toBe(2)
    expect(vm.state).toBe('completed')
    expect(computed(vm, 'uploadDisabled')).toBe(true)

    await vm.handleFileChange({ target: { files: [{ name: 'late.pdf', size: 1 }] } })
    await vm.retryUpload(vm.queue[1])
    await vm.completeUpload()
    expect(vm.uploadOne).not.toHaveBeenCalled()
    expect(api.completePublicUpload).toHaveBeenCalledTimes(1)
  })

  test('completion closes empty and all-failed queues with a zero success count', async () => {
    if (!expectPage(source)) return
    api.completePublicUpload.mockResolvedValue({ code: 0 })

    for (const queue of [[], [{ id: 'failed', status: 'failed' }]]) {
      const vm = createPageVm(api, {
        state: 'ready',
        session: { uploadToken: 'upload-token' },
        queue
      })

      expect(computed({ ...vm, uploadDisabled: false }, 'completeDisabled')).toBe(false)
      await vm.completeUpload()

      expect(vm.state).toBe('completed')
      expect(vm.successCount).toBe(0)
    }
    expect(api.completePublicUpload).toHaveBeenCalledTimes(2)
    expect(api.completePublicUpload).toHaveBeenNthCalledWith(1, 'upload-token')
    expect(api.completePublicUpload).toHaveBeenNthCalledWith(2, 'upload-token')
  })

  test('late completion cannot overwrite timer expiry', async () => {
    if (!expectPage(source)) return
    const request = deferred()
    api.completePublicUpload.mockReturnValue(request.promise)
    const vm = createPageVm(api, {
      state: 'ready',
      session: { uploadToken: 'upload-token' },
      queue: [{ id: '1', status: 'success' }]
    })

    const completing = vm.completeUpload()
    vm.expireSession()
    request.resolve({ code: 0 })
    await completing

    expect(vm.state).toBe('expired')
    expect(vm.successCount).toBe(0)
  })

  test('ready and terminal templates expose only the approved public information', () => {
    if (!expectPage(source)) return

    const template = parseComponent(source).template.content
    const sessionFields = Array.from(template.matchAll(/session\.([A-Za-z_$][\w$]*)/g), match => match[1])

    expect(source).toContain('session.teamName')
    expect(source).toContain('session.expiresAt')
    expect(source).toContain('remainingSeconds')
    expect(source).toContain('TeamBackgroundUploadQueue')
    expect(source).toContain('请返回小程序或管理端重新生成上传链接')
    expect(source).toMatch(/state === 'expired'[\s\S]*请返回小程序或管理端重新生成上传链接/)
    expect(source).toMatch(/state === 'completed'[\s\S]*successCount/)
    expect(source).not.toMatch(/teamDescription|teamMembers|coachName|existingFiles|fileList|listTeamBackgroundFiles/)
    expect(new Set(sessionFields)).toEqual(new Set(['teamName', 'expiresAt']))
    expect(template).not.toMatch(/{{\s*session\s*}}/)
  })
})