const assert = require('assert')

const origin = process.argv[2] || 'http://localhost:5173'
const sleep = (milliseconds) => new Promise((resolve) => setTimeout(resolve, milliseconds))

const run = async () => {
  const pages = await (await fetch('http://127.0.0.1:9222/json/list')).json()
  const page = pages.find((item) => item.type === 'page' && item.url.startsWith(`${origin}/`))
  if (!page) throw new Error(`Chrome debugging has no ${origin} project page`)

  const socket = new WebSocket(page.webSocketDebuggerUrl)
  await new Promise((resolve, reject) => {
    socket.addEventListener('open', resolve, { once: true })
    socket.addEventListener('error', reject, { once: true })
  })

  let id = 0
  const pending = new Map()
  socket.addEventListener('message', (event) => {
    const message = JSON.parse(event.data)
    const request = pending.get(message.id)
    if (!request) return
    pending.delete(message.id)
    message.error ? request.reject(new Error(message.error.message)) : request.resolve(message.result)
  })
  const send = (method, params = {}) => new Promise((resolve, reject) => {
    id += 1
    pending.set(id, { resolve, reject })
    socket.send(JSON.stringify({ id, method, params }))
  })
  const valueOf = async (expression) => (
    await send('Runtime.evaluate', { expression, returnByValue: true })
  ).result?.value
  const waitFor = async (expression, message) => {
    for (let attempt = 0; attempt < 50; attempt += 1) {
      if (await valueOf(expression)) return
      await sleep(80)
    }
    throw new Error(message)
  }

  try {
    await send('Page.enable')
    await send('Runtime.enable')
    await send('Emulation.setDeviceMetricsOverride', {
      width: 412,
      height: 915,
      deviceScaleFactor: 1,
      mobile: true,
      screenWidth: 412,
      screenHeight: 915,
    })
    const url = `${origin}/?f09LayoutAudit=1#/pages/family/f09-media-upload?state=selected`
    await send('Page.navigate', { url })
    await waitFor("Boolean(document.querySelector('.media-upload-state--selected'))", 'F09 selected state missing')
    const metrics = await valueOf(`(() => {
      const textareas = Array.from(document.querySelectorAll('.media-description-panel textarea'))
      const action = document.querySelector('.media-primary-action')
      return {
        textareaHeights: textareas.map((node) => node.getBoundingClientRect().height),
        actionBottom: action.getBoundingClientRect().bottom,
        viewportHeight: innerHeight,
      }
    })()`)
    process.stdout.write(`${JSON.stringify(metrics)}\n`)
    assert(metrics.textareaHeights.every((height) => height <= 72), 'F09 textarea uses an oversized browser default height')
    assert(metrics.actionBottom <= metrics.viewportHeight, 'F09 selected primary action is clipped at 412x915')
    process.stdout.write('F09-MEDIA-UPLOAD-LAYOUT-SMOKE PASS\n')
  } finally {
    try { await send('Emulation.clearDeviceMetricsOverride') } catch (_) {}
    socket.close()
  }
}

run().catch((error) => {
  process.stderr.write(`${error.stack || error.message}\n`)
  process.exit(1)
})