const assert = require('assert')

const baseUrl = 'http://localhost:5173/#/pages/auth/a06-auth-status'
const text = (base64) => Buffer.from(base64, 'base64').toString('utf8')
const expected = {
  normal: text('55m75b2V5pyq5a6M5oiQ'),
  restricted: text('6LSm5Y+35pqC5pe25Y+X6ZmQ'),
  help: text('6LSm5Y+355Sz6K+J5Yqf6IO95b6F5o6l5YWl')
}

const sleep = (milliseconds) => new Promise((resolve) => setTimeout(resolve, milliseconds))

const connect = 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.includes('localhost:5173'))
  if (!page) throw new Error('Chrome debugging has no localhost:5173 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)
    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 }
}

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 < 30; attempt += 1) {
    if (await valueOf(send, expression)) return
    await sleep(100)
  }
  throw new Error(message)
}

const navigate = async (send, url, title) => {
  await send('Page.navigate', { url })
  await waitFor(send, `location.href === ${JSON.stringify(url)}`, `Did not navigate to ${url}`)
  await send('Page.reload')
  await waitFor(send, `location.href === ${JSON.stringify(url)}`, `Reload did not retain ${url}`)
  try {
    await waitFor(send, `document.querySelector('.status-title')?.innerText === ${JSON.stringify(title)}`, `A06 did not render ${title}`)
  } catch (error) {
    const heading = await valueOf(send, "document.querySelector('.status-title')?.innerText")
    throw new Error(`${error.message}; current heading: ${heading}`)
  }
}

const run = async () => {
  const { socket, send } = await connect()

  try {
    await send('Page.enable')
    await send('Runtime.enable')

    await navigate(send, baseUrl, expected.normal)
    await valueOf(send, "document.querySelector('.status-primary')?.click()")
    await waitFor(send, "location.href.includes('/pages/auth/a01-entry')", 'Default A06 action did not return to A01')

    await navigate(send, `${baseUrl}?status=restricted`, expected.restricted)
    await valueOf(send, "document.querySelector('.status-primary')?.click()")
    await waitFor(send, `document.body.innerText.includes(${JSON.stringify(expected.help)})`, 'Restricted A06 action did not show the local help notice')

    await navigate(send, `${baseUrl}?status=register-pending`, text('5rOo5YaM5bCa5pyq5a6M5oiQ'))
    await valueOf(send, "document.querySelector('.status-primary')?.click()")
    await waitFor(send, "location.href.includes('/pages/auth/a04-register')", 'Registration-pending A06 action did not open A04')

    process.stdout.write('A06-AUTH-STATUS-RUNTIME-SMOKE PASS\n')
  } finally {
    socket.close()
  }
}

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