const assert = require('assert')

const a01Url = 'http://localhost:5173/#/pages/auth/a01-entry'
const a04Url = 'http://localhost:5173/#/pages/auth/a04-register'
const sleep = (milliseconds) => new Promise((resolve) => setTimeout(resolve, milliseconds))

const connect = async () => {
  const port = process.env.CHROME_DEBUGGING_PORT || '9222'
  const pages = await (await fetch(`http://127.0.0.1:${port}/json/list`)).json()
  const page = pages.find((item) => item.type === 'page' && item.url.startsWith('http://localhost:5173'))
  if (!page) throw new Error('Chrome debugging has no application 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()
  const exceptions = []
  socket.addEventListener('message', (event) => {
    const message = JSON.parse(event.data)
    if (message.method === 'Runtime.exceptionThrown') exceptions.push(message.params.exceptionDetails.text)
    const request = pending.get(message.id)
    if (!request) return
    pending.delete(message.id)
    if (message.error) request.reject(new Error(message.error.message))
    else 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 }))
  })
  return { socket, send, exceptions }
}

const valueOf = async (send, expression) => {
  const result = await send('Runtime.evaluate', { expression, returnByValue: true })
  if (result.exceptionDetails) {
    throw new Error(result.exceptionDetails.exception?.description || result.exceptionDetails.text)
  }
  return result.result?.value
}

const waitFor = async (send, expression, message) => {
  for (let attempt = 0; attempt < 40; attempt += 1) {
    if (await valueOf(send, expression)) return
    await sleep(100)
  }
  throw new Error(message)
}

const navigate = async (send, url, selector) => {
  // 每次增加查询戳，确保同一路由也会建立全新文档，避免沿用上一次表单状态。
  const targetUrl = url.replace('/#/', `/?runtime=${Date.now()}#/`)
  await send('Page.navigate', { url: targetUrl })
  await waitFor(send, `location.href.includes(${JSON.stringify(new URL(url).hash.slice(1))})`, `Page did not navigate to ${url}`)
  await waitFor(send, `Boolean(document.querySelector(${JSON.stringify(selector)}))`, `Page did not render ${selector}`)
}

const run = async () => {
  const { socket, send, exceptions } = await connect()
  try {
    await send('Page.enable')
    await send('Runtime.enable')

    await navigate(send, a01Url, '.register-link')
    await valueOf(send, "document.querySelector('.register-link').click()")
    await waitFor(send, "location.href.includes('/pages/auth/a04-register')", 'A01 registration entry did not open A04')

    for (const size of [{ width: 320, height: 568 }, { width: 360, height: 800 }, { width: 412, height: 915 }]) {
      await send('Emulation.setDeviceMetricsOverride', { ...size, deviceScaleFactor: 1, mobile: true })
      await navigate(send, a04Url, '.register-submit')
      const metrics = await valueOf(send, `({
        width: document.documentElement.scrollWidth,
        pageClientHeight: document.querySelector('.auth-page').clientHeight,
        pageScrollHeight: document.querySelector('.auth-page').scrollHeight
      })`)
      assert(metrics.width <= size.width + 1, `A04 has horizontal overflow at ${size.width}x${size.height}`)
      if (size.width === 320) assert(metrics.pageScrollHeight > metrics.pageClientHeight, 'A04 must scroll naturally at 320x568')
    }

    await valueOf(send, "document.querySelector('.register-submit').click()")
    await waitFor(send, "document.querySelectorAll('.field-error').length === 3", 'A04 empty submit did not show three field errors')
    assert(await valueOf(send, "Boolean(document.querySelector('.agreement-error'))"), 'A04 empty submit did not show agreement error')

    await valueOf(send, `(() => {
      const inputs = document.querySelectorAll('.auth-input input')
      const values = ['13800138000', 'demo-password', 'demo-password']
      inputs.forEach((input, index) => {
        input.value = values[index]
        input.dispatchEvent(new Event('input', { bubbles: true }))
      })
      document.querySelector('.agreement-row').click()
      document.querySelector('.register-submit').click()
    })()`)
    await waitFor(send, "Boolean(document.querySelector('.verification-layer'))", 'A04 valid submit did not open custom verification')
    await valueOf(send, "document.querySelector('.verification-action--primary').click()")
    await waitFor(send, "Boolean(document.querySelector('.feedback-toast'))", 'A04 verification result did not use custom feedback')

    await navigate(send, a04Url, '.login-entry__link')
    await valueOf(send, "document.querySelector('.login-entry__link').click()")
    await waitFor(send, "Boolean(document.querySelector('.login-tab')) && (location.hash === '#/' || location.href.includes('/pages/auth/a01-entry'))", 'A04 login entry did not return to A01')
    assert.deepStrictEqual(exceptions, [], `A04 raised browser exceptions: ${exceptions.join('; ')}`)

    process.stdout.write('A04-REGISTRATION-RUNTIME-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)
})