import { expect, test, type Page, type Route } from '@playwright/test'
import { TeachingContractMock } from './teaching-contract-mock'
import fs from 'node:fs'
import path from 'node:path'

/** Browser regressions for the 2026-09-05 review. All API responses are mocked.
 * These verify real Vue UI interactions and outgoing payloads, not database persistence.
 * TeachingRunView channel cases use its formal virtual route as a component host;
 * they do not claim that the default PHYSICAL legacy replay is a live API workflow.
 */

type Json = Record<string, unknown>

const SHOTS = path.resolve('reports/review-20260905/frontend-e2e/screenshots')
fs.mkdirSync(SHOTS, { recursive: true })

const envelope = (data: unknown) => ({ code: 200, message: 'OK', data, timestamp: Date.now(), requestId: 'ute2e-training' })
const ok = (route: Route, data: unknown) => route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify(envelope(data)) })
const fail = (route: Route, status: number, message: string) => route.fulfill({
  status, contentType: 'application/json', body: JSON.stringify({ code: status * 100, message, data: null, timestamp: Date.now(), requestId: 'ute2e-training' }),
})
const pageOf = (records: unknown[]) => ({ records, total: records.length, page: 1, size: 20 })

/** 绑定场景：两个可操作对象、一个环境设施、一个已软删除对象。 */
const sceneContent = (): Json => ({
  schema: 'unreal-tran.scene',
  version: '2.0',
  objects: [
    {
      id: 'o1', name: '支腿液压缸总成', visible: true, deleted: false,
      semantic: { category: '液压执行机构', deviceId: 'DEV-01', interactionId: 'cylinder-main', operable: true, capabilities: ['select', 'move', 'inspect', 'measure'], tags: [] },
    },
    {
      id: 'o2', name: '活塞密封圈', visible: true, deleted: false,
      semantic: { category: '密封件', deviceId: 'DEV-02', interactionId: 'seal-ring', operable: true, capabilities: ['select', 'move'], tags: [] },
    },
    {
      id: 'o3', name: '车间地面', visible: true, deleted: false,
      semantic: { category: '环境设施', deviceId: '', interactionId: '', operable: false, capabilities: [], tags: [] },
    },
    {
      id: 'o4', name: '历史对象', visible: true, deleted: true,
      semantic: { category: '液压', deviceId: 'DEV-04', interactionId: 'ghost', operable: true, capabilities: ['select'], tags: [] },
    },
  ],
})

const legacyTrainingContent = (mode: string): Json => ({
  level: '中级',
  durationMinutes: 25,
  totalScore: 100,
  modeConfig: mode === 'CONFRONTATION'
    ? { type: 'CONFRONTATION', redTeamName: '红方', blueTeamName: '蓝方', teamSize: 3, roundDurationMinutes: 30, submitPositions: ['COMMANDER'], objective: '限时排除故障', winRule: '' }
    : { type: mode },
  // 历史工程只有 title/summary/score，缺 stepCode/actionCode/目标，归一化后必须补齐编码。
  steps: [
    { id: 'step_1c9f0e2a-8f11-4c0b-9d6e-77a1f3b5c9d0', title: '检查缸体外观', summary: '目视检查缸筒是否存在划痕', score: 40 },
    { id: 'step_2d8e1f3b-7a22-4b1c-8e5f-66b2e4c6d8e1', title: '拆卸密封圈', summary: '按对角顺序拆除固定螺栓', score: 60 },
  ],
})

class TrainingMock {
  readonly requests: Array<{ method: string; path: string; body: Json }> = []
  mode = 'VIRTUAL'
  content: Json = legacyTrainingContent('VIRTUAL')
  version = 2
  sceneBound = true

  private dependencies() {
    return this.sceneBound
      ? [{
        targetProjectId: '701', targetVersionId: '25', relationType: 'TRAINING_SCENE', required: true,
        targetType: 'SCENE', targetCode: 'SC-2026-014', targetName: '支腿检修车间', targetVersionNumber: 3,
      }]
      : []
  }

  private project() {
    return {
      id: '901', type: 'TRAINING', code: 'TR-2026-071', name: '支腿液压缸中修训练',
      description: '整机支腿液压缸中修标准训练', categoryCode: 'MEDIUM_REPAIR', coverUri: '',
      status: 'DRAFT', trainingMode: this.mode, version: this.version,
      currentVersionId: '31', currentVersionNo: 2, currentVersionCode: 'V1.1.0', currentVersionStatus: 'DRAFT',
      publishedVersionId: null, ownerUserId: '7', ownerName: '内容作者',
      departmentId: '20', departmentName: '维修保障中心',
      addTime: 1786387200, updateTime: 1786387200, publishedTime: null,
      usageCount: 0, readCount: 0, downloadCount: 0,
      dependencyCount: this.dependencies().length, assetCount: 0,
    }
  }

  private detail() {
    return {
      project: this.project(),
      currentVersion: {
        id: '31', projectId: '901', versionNo: 2, versionCode: 'V1.1.0', status: 'DRAFT',
        content: this.content, dependencies: this.dependencies(), assets: [],
        createdByName: '内容作者', publishedByName: '', publishedTime: null,
        addTime: 1786387200, updateTime: 1786387200, dataVersion: 0, changeSummary: '',
      },
    }
  }

  async install(page: Page) {
    await page.route('http://127.0.0.1:6180/api/**', (route) => fail(route, 404, 'API mock: endpoint not covered'))
    await page.addInitScript(() => {
      sessionStorage.setItem('unreal-tran:web:access-token:v1', 'ute2e-training-token')
    })
    await page.route('**/api/auth/v1/auth/me', (route) => ok(route, {
      user: { id: '1', username: 'review.teacher', displayName: '回归测试教员', departmentId: '20', departmentName: '维修保障中心', mustChangePassword: false, version: 1 },
      activeRoleId: 'role-teacher',
      roles: [{ id: 'role-teacher', code: 'teacher', name: '教员', shortName: '教', status: 1, builtIn: 1, isSuperAdmin: 0, dataScopeCode: 'ALL' }],
      permissions: ['content.training', 'content.model', 'content.scene', 'content.ofd', 'content.create', 'content.update', 'content.publish', 'content.delete'],
      authorizationMode: 'SINGLE_ACTIVE', loginTime: 1786387200,
    }))
    await page.route('**/api/auth/v1/menus/navigation', (route) => ok(route, []))
    await page.route('**/api/tran/v1/content/**', (route) => this.handle(route))
  }

  private async handle(route: Route) {
    const request = route.request()
    const url = new URL(request.url())
    const target = url.pathname.replace(/^.*\/v1\/content/, '')
    const method = request.method()
    let body: Json = {}
    try {
      const text = request.postData()
      if (text) body = JSON.parse(text) as Json
    } catch { body = {} }
    this.requests.push({ method, path: target, body })

    if (method === 'GET' && target === '/projects') return ok(route, pageOf([this.project()]))
    if (method === 'GET' && target === '/projects/summary') {
      return ok(route, { total: 1, draft: 1, review: 0, published: 0, byType: [], byTrainingMode: [] })
    }
    if (method === 'GET' && target === '/catalog') return ok(route, pageOf([]))
    if (method === 'GET' && target === '/projects/901') return ok(route, this.detail())
    if (method === 'PUT' && target === '/projects/901') {
      if (body.content && typeof body.content === 'object') this.content = body.content as Json
      if (typeof body.trainingMode === 'string') this.mode = body.trainingMode
      this.version += 1
      return ok(route, this.detail())
    }
    if (method === 'GET' && target === '/projects/901/versions') return ok(route, pageOf([this.detail().currentVersion]))
    if (method === 'GET' && target === '/projects/901/versions/31') return ok(route, this.detail().currentVersion)
    if (method === 'GET' && target === '/projects/901/reviews') return ok(route, [])
    // 绑定场景的已发布版本，工作台据此解析可操作目标
    if (method === 'GET' && target === '/projects/701/versions/25') {
      return ok(route, {
        id: '25', projectId: '701', versionNo: 3, versionCode: 'V1.2.0', status: 'PUBLISHED',
        content: sceneContent(), dependencies: [], assets: [],
        createdByName: '内容作者', publishedByName: '内容作者', publishedTime: 1786387200,
        addTime: 1786387200, updateTime: 1786387200, dataVersion: 0, changeSummary: '',
      })
    }
    if (method === 'POST' && target === '/projects/901/metrics') return ok(route, {})
    return fail(route, 404, `未打桩的内容接口 ${method} ${target}`)
  }

  /** 最后一次保存提交的 content，用于断言工作台真正回写了什么。 */
  savedContent(): Json {
    const last = [...this.requests].reverse().find((item) => item.method === 'PUT')
    return (last?.body.content ?? {}) as Json
  }

  savedSteps(): Json[] {
    const content = this.savedContent()
    return Array.isArray(content.steps) ? content.steps as Json[] : []
  }
}

const multiChannelContent = (): Json => ({
  schema: 'unreal-tran.training/v1', trainingMode: 'VIRTUAL',
  enabledChannels: ['VIRTUAL', 'PHYSICAL', 'CONFRONTATION'],
  modeConfig: { type: 'VIRTUAL', renderMode: '原有渲染方式' },
  channelProfiles: {
    VIRTUAL: { type: 'VIRTUAL', renderMode: '原有渲染方式' },
    PHYSICAL: { type: 'PHYSICAL', stationName: '保留的实装工位', manualConfirmAllowed: true },
    CONFRONTATION: { type: 'CONFRONTATION', teamSize: 6, roundDurationMinutes: 45, submitPositions: ['COMMANDER'], objective: '协同目标应保留' },
  },
  level: '中级', durationMinutes: 15, totalScore: 100,
  steps: [1, 2, 3].map((n) => ({
    id: `saved-${n}`, stepCode: `FIXED-S0${n}`, actionCode: `FIXED-A0${n}`, order: n,
    title: `已保存步骤${n}`, summary: '浏览器契约回归步骤', targetId: 'cylinder-main',
    targetName: '支腿液压缸总成', mode: 'inspect', interaction: 'target-confirm', score: n === 3 ? 34 : 33,
    physicalEventRule: { source: 'MANUAL', eventType: `REVIEW_EVENT_0${n}`, progressPercent: [33, 67, 100][n - 1], manualConfirmAllowed: true },
    allowedPositions: ['COMMANDER'],
  })),
})

const shot = async (page: Page, name: string) => {
  const filename = path.join(SHOTS, `${name}.png`)
  await page.screenshot({ path: filename, fullPage: true })
  await test.info().attach(name, { path: filename, contentType: 'image/png' })
}

const saveStudio = async (page: Page, mock: TrainingMock) => {
  const count = mock.requests.filter((item) => item.method === 'PUT').length
  await page.locator('.content-action-bar').getByRole('button', { name: '保存', exact: true }).click()
  await expect.poll(() => mock.requests.filter((item) => item.method === 'PUT').length).toBe(count + 1)
  await expect(page.locator('.studio-dirty')).toHaveCount(0)
}

test.describe('API mock浏览器回归：已保存的实装步骤', () => {
  for (const action of ['move', 'delete', 'duplicate'] as const) {
    test(`${action}后保存重算顺序和实装进度`, async ({ page }) => {
      const mock = new TrainingMock()
      // The default remains VIRTUAL; PHYSICAL enabled as a secondary channel must still be correct.
      mock.content = multiChannelContent()
      await mock.install(page)
      await page.goto('/content/training-projects/901/studio?view=steps')
      const rows = page.locator('.step-list > li')
      await expect(rows).toHaveCount(3)
      if (action === 'move') {
        await rows.nth(2).locator('.step-row').click()
        await rows.nth(2).getByRole('button', { name: '上移', exact: true }).click()
        await expect(rows.nth(1)).toContainText('已保存步骤3')
      } else if (action === 'delete') {
        await rows.nth(2).locator('.step-row').click()
        await rows.nth(2).getByRole('button', { name: '删除', exact: true }).click()
        await page.getByRole('button', { name: '确认删除', exact: true }).click()
        await expect(rows).toHaveCount(2)
      } else {
        await rows.nth(0).getByRole('button', { name: '复制', exact: true }).click()
        await expect(rows).toHaveCount(4)
      }
      await saveStudio(page, mock)
      const saved = mock.savedSteps()
      expect(saved.map((step) => step.order)).toEqual(saved.map((_, index) => index + 1))
      expect(saved.map((step) => (step.physicalEventRule as Json).progressPercent)).toEqual(
        action === 'move' ? [33, 67, 100] : action === 'delete' ? [50, 100] : [25, 50, 75, 100],
      )
      if (action === 'move') expect(saved.map((step) => step.stepCode)).toEqual(['FIXED-S01', 'FIXED-S03', 'FIXED-S02'])
      if (action === 'delete') expect(saved.map((step) => step.stepCode)).toEqual(['FIXED-S01', 'FIXED-S02'])
      expect(new Set(saved.map((step) => step.stepCode)).size).toBe(saved.length)
      await test.info().attach('保存请求中的训练内容（API mock）', { body: Buffer.from(JSON.stringify(mock.savedContent(), null, 2)), contentType: 'application/json' })
      await page.reload()
      await expect(rows).toHaveCount(saved.length)
      await page.locator('.el-form-item', { hasText: '完成后进度' }).scrollIntoViewIfNeeded()
      await shot(page, `01-saved-step-${action}`)
    })
  }
})

test('API mock浏览器回归：通用编辑器保存并切换默认渠道不丢配置', async ({ page }) => {
  const mock = new TrainingMock()
  mock.content = multiChannelContent()
  const originalProfiles = structuredClone(mock.content.channelProfiles) as Record<string, Json>
  await mock.install(page)
  await page.goto('/content/training-projects/901/edit')
  await page.getByRole('tab', { name: '结构化内容', exact: true }).click()
  const renderMode = page.locator('.el-form-item', { hasText: '渲染方式' }).locator('input')
  await expect(renderMode).toHaveValue('原有渲染方式')
  await renderMode.fill('回归验证后的渲染方式')
  const save = async () => {
    const count = mock.requests.filter((item) => item.method === 'PUT').length
    await page.getByRole('button', { name: '保存草稿', exact: true }).click()
    await expect.poll(() => mock.requests.filter((item) => item.method === 'PUT').length).toBe(count + 1)
    await expect(page.getByRole('button', { name: '保存草稿', exact: true })).toBeEnabled()
  }
  await save()
  let saved = mock.savedContent()
  let profiles = saved.channelProfiles as Record<string, Json>
  expect(saved.enabledChannels).toEqual(['VIRTUAL', 'PHYSICAL', 'CONFRONTATION'])
  expect(saved.modeConfig).toEqual(profiles.VIRTUAL)
  expect(profiles.VIRTUAL!.renderMode).toBe('回归验证后的渲染方式')
  // Normalization may add documented defaults; every existing value must survive.
  expect(profiles.PHYSICAL).toMatchObject(originalProfiles.PHYSICAL!)
  expect(profiles.CONFRONTATION).toMatchObject(originalProfiles.CONFRONTATION!)
  await page.reload()
  await page.getByRole('tab', { name: '结构化内容', exact: true }).click()
  await expect(renderMode).toHaveValue('回归验证后的渲染方式')
  await shot(page, '02-multichannel-virtual-save')
  await page.getByRole('tab', { name: '基本信息', exact: true }).click()
  await page.locator('.el-form-item', { hasText: '训练模式' }).locator('.el-select').click()
  await page.locator('.el-select-dropdown:visible .el-select-dropdown__item').filter({ hasText: '对抗' }).click()
  await page.getByRole('tab', { name: '结构化内容', exact: true }).click()
  await expect(page.locator('.el-form-item', { hasText: '每队人数' }).locator('input')).toHaveValue('6')
  const roundDuration = page.locator('.el-form-item', { hasText: '单局时长' }).locator('input')
  await expect(roundDuration).toHaveValue('45')
  await roundDuration.fill('60')
  await roundDuration.press('Tab')
  await save()
  saved = mock.savedContent()
  profiles = saved.channelProfiles as Record<string, Json>
  expect(saved.trainingMode).toBe('CONFRONTATION')
  expect(saved.modeConfig).toEqual(profiles.CONFRONTATION)
  expect(profiles.CONFRONTATION!.roundDurationMinutes).toBe(60)
  expect(profiles.CONFRONTATION!.teamSize).toBe(6)
  expect(profiles.VIRTUAL!.renderMode).toBe('回归验证后的渲染方式')
  expect(profiles.PHYSICAL).toMatchObject(originalProfiles.PHYSICAL!)
  expect(saved.enabledChannels).toEqual(['VIRTUAL', 'PHYSICAL', 'CONFRONTATION'])
  await page.reload()
  await page.getByRole('tab', { name: '结构化内容', exact: true }).click()
  await expect(roundDuration).toHaveValue('60')
  await shot(page, '03-multichannel-confrontation-save')
})

const overlayCases = [
  { name: '普通虚拟训练', channel: 'VIRTUAL', kind: 'TRAINING', status: 'IN_PROGRESS', closed: false },
  { name: '普通实装组件', channel: 'PHYSICAL', kind: 'TRAINING', status: 'IN_PROGRESS', closed: false },
  { name: '普通对抗组件', channel: 'CONFRONTATION', kind: 'TRAINING', status: 'IN_PROGRESS', closed: false },
  { name: '进行中正式考核', channel: 'VIRTUAL', kind: 'FORMAL_EXAM', status: 'IN_PROGRESS', closed: false },
  { name: '未开始正式考核', channel: 'VIRTUAL', kind: 'FORMAL_EXAM', status: 'ACCEPTED', closed: true },
  { name: '已提交正式考核', channel: 'VIRTUAL', kind: 'FORMAL_EXAM', status: 'SUBMITTED', closed: true },
] as const

test.describe('API mock浏览器回归：失败步骤重试', () => {
  for (const status of ['IN_PROGRESS', 'SUBMITTED', 'TERMINATED'] as const) {
    test(`运行${status}的失败步骤重试入口`, async ({ page }) => {
      await page.route('http://127.0.0.1:6180/api/**', (route) => fail(route, 404, 'API mock: endpoint not covered'))
      const contract = new TeachingContractMock('studentLeader')
      const run: Json = contract.seedTerminableRun()
      run.status = status
      const task = contract.assignments.get('assignment-virtual-common')!
      task.name = 'API mock：失败步骤重试'
      task.digitalHumanAllowed = false
      task.digitalInstructorAgentSlug = ''
      ;(task.definitionSnapshot as Json).scenario = { schema: 'unreal-tran.scene', version: '2.0', objects: [] }
      const facts = [{
        id: 'step-fact-1', runId: run.id, assignmentId: task.id, stepCode: 'STEP-01', stepOrder: 1,
        targetProgressPercent: 50, statusCode: 'FAILED', attemptCount: 1, failureCount: 1,
        lastFailureCode: 'REVIEW_RETRY', evidenceSourceCode: 'DEVICE', lastActorUserId: '4',
        lastRunMemberId: 'member-red-leader', lastEventId: 'event-failed', startedAt: 1786387200,
        completedAt: null, failedAt: 1786387210, isBackfilled: 0, dataVersion: 1,
      }]
      await contract.install(page)
      await page.route('**/api/tran/v1/teaching/runs/*/steps', (route) => ok(route, facts))
      const commands: Json[] = []
      await page.route('**/api/tran/v1/teaching/runs/*/start', async (route) => {
        const body = route.request().postDataJSON() as Json
        commands.push(body)
        expect(route.request().headers()['idempotency-key']).toBe(body.commandId)
        Object.assign(facts[0]!, { statusCode: 'IN_PROGRESS', attemptCount: 2, dataVersion: 2 })
        run.version = Number(run.version) + 1
        await ok(route, run)
      })
      await page.goto(`/teaching/virtual-training/runs/${run.id}`)
      await expect(page.locator('.runtime-stage-card')).toBeVisible()
      const retry = page.getByRole('button', { name: '重试当前步骤', exact: true })
      if (status === 'IN_PROGRESS') {
        await expect(retry).toBeVisible()
        await expect(page.locator('.runtime-step-fact-meta').first()).toContainText('未通过 1')
        await shot(page, '05-failed-before-retry')
        await retry.click()
        await expect(retry).toHaveCount(0)
        expect(commands).toHaveLength(1)
        expect(String(commands[0]!.commandId)).toMatch(/^[a-f0-9-]{36}$/i)
        await expect(page.locator('.runtime-step-fact-meta').first()).toContainText('尝试 2')
        await expect(page.locator('.runtime-step-fact-meta').first()).toContainText('未通过 1')
        await page.reload()
        await expect(retry).toHaveCount(0)
        await expect(page.locator('.runtime-step-fact-meta').first()).toContainText('尝试 2')
        await shot(page, '06-failed-after-retry')
      } else {
        await expect(retry).toHaveCount(0)
        expect(commands).toHaveLength(0)
        await shot(page, `07-no-retry-${status}`)
      }
    })
  }
})

test.describe('API mock浏览器回归：执行场景关闭遮罩', () => {
  for (const [index, item] of overlayCases.entries()) {
    test(item.name, async ({ page }) => {
      await page.route('http://127.0.0.1:6180/api/**', (route) => fail(route, 404, 'API mock: endpoint not covered'))
      const contract = new TeachingContractMock('studentLeader')
      const task = contract.assignments.get('assignment-exam')!
      Object.assign(task, { channel: item.channel, assignmentKind: item.kind, executionMode: item.kind === 'FORMAL_EXAM' ? 'EXAM' : 'PRACTICE', digitalHumanAllowed: false, digitalInstructorAgentSlug: '', name: `API mock：${item.name}` })
      const definition = task.definitionSnapshot as Json
      // Primitive-only fixture avoids unrelated large GLB downloads and external resources.
      definition.scenario = { schema: 'unreal-tran.scene', version: '2.0', objects: [] }
      const run = contract.runs.get('run-exam')!
      Object.assign(run, { status: item.status, progressPercent: item.status === 'SUBMITTED' ? 100 : 0 })
      Object.assign(run.assignment as Json, { channel: item.channel, assignmentKind: item.kind, executionMode: task.executionMode, name: task.name, digitalHumanAllowed: false, digitalInstructorAgentSlug: '' })
      await contract.install(page)
      await page.route('**/api/tran/v1/teaching/runs/*/steps', (route) => ok(route, []))
      const errors: string[] = []
      page.on('pageerror', (error) => errors.push(error.message))
      await page.goto('/teaching/virtual-training/runs/run-exam')
      await expect(page.locator('.runtime-stage-card')).toBeVisible()
      await expect(page.locator('.runtime-formal-scene-closed')).toHaveCount(item.closed ? 1 : 0)
      if (item.closed) {
        await expect(page.getByText('正式考核执行场景已关闭', { exact: true })).toBeVisible()
        await expect(page.locator('.runtime-scene-window canvas')).toHaveCount(0)
      } else {
        await expect(page.locator('.runtime-scene-window canvas')).toBeVisible()
      }
      expect(errors).toEqual([])
      await shot(page, `04-overlay-${index + 1}-${item.channel}-${item.status}`)
    })
  }
})

test.describe('API mock浏览器视觉回归：场景填充与安全确认区', () => {
  for (const theme of ['military', 'dark'] as const) {
    test(`${theme}主题画布铺满且安全文字可读`, async ({ page }) => {
      await page.addInitScript((themeMode) => {
        localStorage.setItem('unreal-tran:web:preferences:v1', JSON.stringify({ themeMode }))
      }, theme)
      await page.route('http://127.0.0.1:6180/api/**', (route) => fail(route, 404, 'API mock: endpoint not covered'))
      const contract = new TeachingContractMock('studentLeader')
      const run = contract.seedTerminableRun()
      const task = contract.assignments.get('assignment-virtual-common')!
      task.name = `API mock：${theme}场景与安全确认`
      task.digitalHumanAllowed = false
      task.digitalInstructorAgentSlug = ''
      const definition = task.definitionSnapshot as Json
      definition.scenario = { schema: 'unreal-tran.scene', version: '2.0', objects: [] }
      ;(definition.steps as Json[])[0]!.safetyRules = [
        { key: 'safety-1', text: '确认作业区已隔离且无无关人员进入', required: true },
        { key: 'safety-2', text: '确认所需防护用品已佩戴并检查完好', required: true },
      ]
      await contract.install(page)
      await page.route('**/api/tran/v1/teaching/runs/*/steps', (route) => ok(route, []))
      await page.goto(`/teaching/virtual-training/runs/${run.id}`)
      const gate = page.locator('.runtime-safety-gate')
      const scene = page.locator('.runtime-scene-window > .teaching-three-scene')
      const viewport = page.locator('.runtime-scene-window')
      await expect(gate).toBeVisible()
      await expect(gate.getByRole('checkbox')).toHaveCount(2)
      await expect(page.locator('html')).toHaveAttribute('data-theme', theme === 'dark' ? 'dark' : 'light')
      await expect.poll(async () => {
        const host = await scene.boundingBox()
        const window = await viewport.boundingBox()
        return host && window ? Math.abs(host.height - window.height) : 999
      }).toBeLessThanOrEqual(2)
      const sceneBox = (await scene.boundingBox())!
      const viewportBox = (await viewport.boundingBox())!
      expect(Math.abs(sceneBox.width - viewportBox.width)).toBeLessThanOrEqual(2)
      const colors = await gate.evaluate((element) => {
        const canvas = document.createElement('canvas')
        canvas.width = canvas.height = 1
        const context = canvas.getContext('2d')!
        const rgba = (value: string) => {
          context.clearRect(0, 0, 1, 1)
          context.fillStyle = value
          context.fillRect(0, 0, 1, 1)
          return Array.from(context.getImageData(0, 0, 1, 1).data)
        }
        const color = (target: Element, property: 'color' | 'backgroundColor') => rgba(getComputedStyle(target)[property])
        return {
          background: color(element, 'backgroundColor'),
          header: color(element.querySelector('header b')!, 'color'),
          label: color(element.querySelector('.el-checkbox__label')!, 'color'),
        }
      })
      const luminance = (color: number[]) => color.slice(0, 3).map((value) => {
        const channel = value / 255
        return channel <= 0.04045 ? channel / 12.92 : ((channel + 0.055) / 1.055) ** 2.4
      }).reduce((result, value, index) => result + value * [0.2126, 0.7152, 0.0722][index]!, 0)
      const contrast = (text: number[]) => {
        const values = [luminance(text), luminance(colors.background)].sort((a, b) => b - a)
        return (values[0]! + 0.05) / (values[1]! + 0.05)
      }
      expect(colors.background[3], '安全确认区应有独立不透明背景').toBe(255)
      expect(contrast(colors.header), '标题与背景对比度').toBeGreaterThanOrEqual(4.5)
      expect(contrast(colors.label), '复选框文字与背景对比度').toBeGreaterThanOrEqual(4.5)
      // Element Plus visually replaces its hidden native input; click the rendered label.
      await gate.locator('.el-checkbox').first().click()
      await expect(gate.locator('header em')).toHaveText('1 / 2')
      await expect(gate.getByRole('checkbox').first()).toBeChecked()
      await test.info().attach('视觉测量（API mock）', { body: Buffer.from(JSON.stringify({ theme, sceneBox, viewportBox, colors, headerContrast: contrast(colors.header), checkboxContrast: contrast(colors.label) }, null, 2)), contentType: 'application/json' })
      await shot(page, `08-visual-safety-${theme}`)
    })
  }
})