const assert = require('assert')

const url = 'http://localhost:5173/#/pages/auth/a01-entry'
const sizes = [
  { width: 320, height: 568 },
  { width: 360, height: 640 },
  { width: 360, height: 800 },
  { width: 412, height: 915 }
]
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 })
  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 run = async () => {
  const { socket, send, exceptions } = await connect()
  try {
    await send('Page.enable')
    await send('Runtime.enable')

    for (const size of sizes) {
      await send('Emulation.setDeviceMetricsOverride', {
        width: size.width,
        height: size.height,
        deviceScaleFactor: 1,
        mobile: true
      })
      await send('Page.navigate', { url })
      await send('Page.reload')
      await waitFor(send, "document.querySelectorAll('.login-tab').length === 2", `A01 did not render at ${size.width}x${size.height}`)
      if (size.width === 320 && size.height === 568) {
        await waitFor(send, "document.querySelector('.auth-page')?.scrollHeight > document.querySelector('.auth-page')?.clientHeight", 'A01 did not establish natural scrolling at 320x568')
      }

      const metrics = await valueOf(send, `({
        innerWidth: window.innerWidth,
        innerHeight: window.innerHeight,
        scrollWidth: document.documentElement.scrollWidth,
        scrollHeight: document.documentElement.scrollHeight,
        pageClientHeight: document.querySelector('.auth-page')?.clientHeight,
        pageScrollHeight: document.querySelector('.auth-page')?.scrollHeight
      })`)
      assert.strictEqual(metrics.innerWidth, size.width, `A01 viewport width mismatch at ${size.width}x${size.height}`)
      assert(metrics.scrollWidth <= size.width + 1, `A01 has horizontal overflow at ${size.width}x${size.height}: ${metrics.scrollWidth}`)
      if (size.width === 320 && size.height === 568) {
        assert(metrics.pageScrollHeight > metrics.pageClientHeight, 'A01 must scroll naturally at 320x568')
      }
    }

    await valueOf(send, "document.querySelectorAll('.login-tab')[1].click()")
    await waitFor(send, "document.querySelectorAll('.login-tab')[1].classList.contains('active')", 'A01 SMS tab did not activate')
    await waitFor(send, "Boolean(document.querySelector('.input-icon--sms img'))", 'A01 SMS field image did not render after tab activation')
    const smsIconSource = await valueOf(send, "document.querySelector('.input-icon--sms img')?.getAttribute('src')")
    assert(smsIconSource?.includes('a01-icon-sms-code-v2.png'), `A01 SMS state did not use the approved message icon: ${smsIconSource}`)
    assert.strictEqual(await valueOf(send, "Boolean(document.querySelector('.password-toggle'))"), false, 'A01 SMS state retained the password eye')
    assert.strictEqual(await valueOf(send, "Boolean(document.querySelector('.forgot-password'))"), false, 'A01 SMS state retained forgot password')

    await valueOf(send, "document.querySelectorAll('.login-tab')[0].click()")
    await waitFor(send, "document.querySelectorAll('.login-tab')[0].classList.contains('active')", 'A01 password tab did not activate')
    assert(await valueOf(send, "Boolean(document.querySelector('.password-toggle'))"), 'A01 password state is missing the eye control')
    assert(await valueOf(send, "Boolean(document.querySelector('.forgot-password'))"), 'A01 password state is missing forgot password')

    await valueOf(send, `(() => {
      const inputs = document.querySelectorAll('.auth-input input')
      inputs[0].value = '13800138000'
      inputs[0].dispatchEvent(new Event('input', { bubbles: true }))
      inputs[1].value = 'demo-password'
      inputs[1].dispatchEvent(new Event('input', { bubbles: true }))
      document.querySelector('.login-submit').click()
    })()`)
    await waitFor(send, "Boolean(document.querySelector('.agreement-error'))", 'A01 did not show inline agreement validation')
    await valueOf(send, "document.querySelector('.agreement-row').click()")
    await waitFor(send, "!document.querySelector('.agreement-error')", 'A01 agreement error did not clear after selection')
    await valueOf(send, "document.querySelector('.login-submit').click()")
    await waitFor(send, "Boolean(document.querySelector('.verification-layer'))", 'A01 did not open the custom verification layer after local validation')
    assert.deepStrictEqual(exceptions, [], `A01 raised browser exceptions: ${exceptions.join('; ')}`)

    process.stdout.write('A01-RESPONSIVE-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)
})