// Production check against the deployed Space. Uses the real HF token.
//   PROD_URL=https://lvwerra-interactive-editor.hf.space HF_TOKEN=hf_xxx node test/prod.js
import assert from 'node:assert'
import * as Y from 'yjs'
import { HocuspocusProvider, HocuspocusProviderWebsocket } from '@hocuspocus/provider'
import WS from 'ws'

const BASE = process.env.PROD_URL || 'https://lvwerra-interactive-editor.hf.space'
const TOKEN = process.env.HF_TOKEN
if (!TOKEN) throw new Error('HF_TOKEN required')
const HANDLE = 'prod-smoke-agent'

// The Space is private: the ws upgrade must carry the HF token for the proxy.
class AuthedWS extends WS {
  constructor(url, protocols) {
    super(url, protocols, { headers: { authorization: `Bearer ${TOKEN}` } })
  }
}

const api = (path, { method = 'GET', body } = {}) =>
  fetch(BASE + path, {
    method,
    headers: { authorization: `Bearer ${TOKEN}`, ...(body ? { 'content-type': 'application/json' } : {}) },
    body: body ? JSON.stringify(body) : undefined,
  }).then(r => r.json())

async function waitFor(fn, what, ms = 20000) {
  const t0 = Date.now()
  while (Date.now() - t0 < ms) {
    try {
      if (await fn()) return
    } catch {}
    await new Promise(r => setTimeout(r, 250))
  }
  throw new Error(`timeout waiting for ${what}`)
}

async function main() {
  const me = await api('/api/me')
  assert.ok(me.user?.username, 'authenticated: ' + JSON.stringify(me))
  console.log('✓ authenticated as', me.user.username)

  const { id: docId } = await api('/api/docs', { method: 'POST', body: { title: 'Prod Smoke' } })
  assert.ok(docId)
  console.log('✓ doc created:', docId)

  const doc = new Y.Doc()
  const socket = new HocuspocusProviderWebsocket({
    url: BASE.replace('https', 'wss') + '/collab',
    WebSocketPolyfill: AuthedWS,
  })
  const provider = new HocuspocusProvider({ websocketProvider: socket, name: docId, document: doc, token: TOKEN })
  provider.attach()
  const frag = doc.getXmlFragment('default')
  await waitFor(() => frag.length >= 2, 'ws sync')
  console.log('✓ websocket collab sync through the Space proxy')

  const reg = await api('/api/agents', { method: 'POST', body: { handle: HANDLE } })
  assert.equal(reg.ok, true, JSON.stringify(reg))
  assert.ok(reg.key?.startsWith('ak_'), 'agent key issued')
  const AGENT = reg.key
  const agentApi = (path, opts = {}) =>
    fetch(BASE + path, {
      method: opts.method || 'GET',
      headers: { authorization: `Bearer ${AGENT}`, ...(opts.body ? { 'content-type': 'application/json' } : {}) },
      body: opts.body ? JSON.stringify(opts.body) : undefined,
    }).then(r => r.json())

  const threadId = 'prodth' + Math.random().toString(36).slice(2, 8)
  doc.transact(() => {
    const messages = new Y.Array()
    messages.push([{ id: 'pm1', author: me.user.username, authorType: 'user', text: `@${HANDLE} check this`, ts: Date.now() }])
    const t = new Y.Map()
    t.set('id', threadId)
    t.set('anchorStart', b64(Y.createRelativePositionFromTypeIndex(frag, 1)))
    t.set('anchorEnd', b64(Y.createRelativePositionFromTypeIndex(frag, 2)))
    t.set('excerpt', 'prod excerpt')
    t.set('resolved', false)
    t.set('createdBy', me.user.username)
    t.set('createdAt', Date.now())
    t.set('messages', messages)
    doc.getMap('threads').set(threadId, t)
  })

  const poll = await (async () => {
    const resp = await fetch(`${BASE}/api/mentions/stream?wait=15`, { headers: { authorization: `Bearer ${AGENT}` } })
    let text = ''
    for await (const chunk of resp.body) text += Buffer.from(chunk).toString()
    return JSON.parse(text.trim().split('\n').filter(l => !l.startsWith(':')).pop())
  })()
  assert.equal(poll.mentions?.length, 1, JSON.stringify(poll))
  console.log('✓ mention delivered via long-poll')

  const snap = await api(`/api/docs/${docId}`)
  assert.ok(snap.blocks?.length >= 2)

  const sugg = await agentApi(`/api/docs/${docId}/suggestions`, {
    method: 'POST',
    body: {
      block_index: 1,
      replacement_markdown: 'Rewritten by the **prod** smoke agent.',
      rationale: 'prod test',
      mention_id: poll.mentions[0].mention_id,
      thread_id: threadId,
    },
  })
  assert.equal(sugg.ok, true, JSON.stringify(sugg))
  const reply = await agentApi(`/api/docs/${docId}/threads/${threadId}/reply`, {
    method: 'POST',
    body: { text: 'done — see suggestion', mention_id: poll.mentions[0].mention_id },
  })
  assert.equal(reply.ok, true)
  console.log('✓ agent reply + suggestion')

  await waitFor(() => {
    const msgs = doc.getMap('threads').get(threadId)?.get('messages')?.toArray() || []
    return msgs[0]?.mentions?.[0]?.status === 'done' && msgs.some(m => m.authorType === 'agent')
  }, 'chip done + agent msg synced to client')
  console.log('✓ status chip ✅ and agent reply visible in live doc')

  const acc = await api(`/api/docs/${docId}/suggestions/${sugg.suggestion_id}/accept`, { method: 'POST' })
  assert.equal(acc.ok, true, JSON.stringify(acc))
  await waitFor(async () => (await api(`/api/docs/${docId}`)).markdown.includes('prod'), 'accept applied')
  console.log('✓ suggestion accepted and applied')

  // agent adds a figure: upload bytes, reference in a suggestion, accept
  const pngBytes = Buffer.from(
    'iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAYAAADED76LAAAAF0lEQVR4nGP8z8Dwn4EIwESMolGFtFEIAK5+AxGmizXcAAAAAElFTkSuQmCC',
    'base64'
  )
  const up = await fetch(`${BASE}/api/docs/${docId}/upload`, {
    method: 'POST',
    headers: { authorization: `Bearer ${AGENT}`, 'content-type': 'image/png' },
    body: pngBytes,
  }).then(r => r.json())
  assert.ok(up.url?.startsWith('/files/'), 'agent upload: ' + JSON.stringify(up))
  const figSugg = await agentApi(`/api/docs/${docId}/suggestions`, {
    method: 'POST',
    body: {
      block_index: 1,
      replacement_markdown: `A paragraph with a figure.\n\n![test figure](${up.url})`,
    },
  })
  assert.equal(figSugg.ok, true, JSON.stringify(figSugg))
  const figAcc = await api(`/api/docs/${docId}/suggestions/${figSugg.suggestion_id}/accept`, { method: 'POST' })
  assert.equal(figAcc.ok, true, JSON.stringify(figAcc))
  await waitFor(async () => (await api(`/api/docs/${docId}`)).markdown.includes('![test figure]'), 'figure in doc')
  const fig = await fetch(`${BASE}${up.url}`, { headers: { authorization: `Bearer ${TOKEN}` } })
  assert.equal(fig.status, 200, 'figure served')
  console.log('✓ agent figure: upload -> suggestion -> accept -> served')

  // streaming long-poll must survive the proxy well past 60s (heartbeats)
  console.log('… streaming long-poll test (~70s: mention arrives 65s into the stream)')
  const streamP = (async () => {
    const resp = await fetch(`${BASE}/api/mentions/stream?wait=90`, { headers: { authorization: `Bearer ${AGENT}` } })
    let text = ''
    for await (const chunk of resp.body) text += Buffer.from(chunk).toString()
    return text
  })()
  await new Promise(r => setTimeout(r, 65000))
  doc.transact(() => {
    doc.getMap('threads').get(threadId).get('messages').push([
      { id: 'pm-stream', author: me.user.username, authorType: 'user', text: `@${HANDLE} still there?`, ts: Date.now() },
    ])
  })
  const sText = await streamP
  const sLast = sText.trim().split('\n').filter(l => !l.startsWith(':')).pop()
  const sRes = JSON.parse(sLast)
  assert.ok(sRes.mentions?.length >= 1, 'stream delivered after 65s: ' + String(sLast).slice(0, 200))
  assert.ok(sText.split(':hb').length > 2, 'heartbeats flowed through the proxy')
  console.log('✓ streaming long-poll: mention delivered 65s in, through the Space proxy')

  provider.destroy()
  socket.destroy()
  try {
    await api(`/api/docs/${docId}`, { method: 'DELETE' })
    await api(`/api/agents/${HANDLE}`, { method: 'DELETE' })
    console.log('✓ cleanup (doc + handle deleted)')
  } catch {
    console.log('~ cleanup skipped (delete endpoint not in running image yet)')
  }
  console.log('\nPROD CHECK PASSED')
  process.exit(0)
}

function b64(rel) {
  return Buffer.from(Y.encodeRelativePosition(rel)).toString('base64url')
}

main().catch(err => {
  console.error('PROD CHECK FAILED:', err)
  process.exit(1)
})