// End-to-end preview test using Playwright and a provided session.
// Requires a valid session token in env PREVIEW_SESSION and a design ID in PREVIEW_DESIGN_ID.
// Example: PREVIEW_SESSION=abc PREVIEW_DESIGN_ID=design_123 pnpm node tests/preview-e2e.js

const { chromium } = require('playwright')

async function main() {
  const session = process.env.PREVIEW_SESSION
  const designId = process.env.PREVIEW_DESIGN_ID
  if (!session || !designId) {
    console.error('Set PREVIEW_SESSION and PREVIEW_DESIGN_ID env vars.')
    process.exit(1)
  }

  const browser = await chromium.launch({ headless: true })
  const page = await browser.newPage()
  const errors = []
  const exportStatuses = []

  page.on('console', (msg) => {
    if (msg.type() === 'error') errors.push(`console error: ${msg.text()}`)
  })
  page.on('pageerror', (err) => errors.push(`page error: ${err.message}`))

  // capture export job status responses
  page.on('response', async (res) => {
    const url = res.url()
    if (url.includes('/exports/')) {
      try {
        const json = await res.json()
        exportStatuses.push({ url, status: res.status(), body: json })
      } catch {
        exportStatuses.push({ url, status: res.status(), body: 'non-json' })
      }
    }
  })

  // prime persisted store so app is "connected" (same origin needed)
  await page.goto('http://localhost:3000', { waitUntil: 'load' })
  await page.evaluate(
    ({ session }) => {
      const payload = {
        isConnected: true,
        user: { name: 'Playwright User' },
        accessToken: 'dummy',
        refreshToken: 'dummy',
        canvaUserId: 'dummy',
        initializing: false,
        sessionId: session
      }
      localStorage.setItem('canva-store', JSON.stringify(payload))
    },
    { session }
  )

  // Hit API directly to create export (bypass UI flake)
  const apiBase = 'http://127.0.0.1:4000'
  const createRes = await fetch(`${apiBase}/exports?session=${encodeURIComponent(session)}`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ design_id: designId, format: { type: 'png' } })
  })
  if (!createRes.ok) {
    throw new Error(`Failed to create export: ${createRes.status} ${await createRes.text()}`)
  }
  const job = await createRes.json()
  const jobId =
    job?.id || job?.export_id || job?.export?.id || job?.job_id || job?.job?.id
  if (!jobId) throw new Error('No export job id returned from API')

  let exportUrl = null
  for (let i = 0; i < 60; i++) {
    await new Promise((r) => setTimeout(r, 1000))
    const statusRes = await fetch(`${apiBase}/exports/${encodeURIComponent(jobId)}?session=${encodeURIComponent(session)}`)
    const statusJson = await statusRes.json()
    exportStatuses.push({ url: statusRes.url, status: statusRes.status, body: statusJson })
    const urls = statusJson?.job?.urls || statusJson?.urls
    if (statusJson?.job?.status === 'success' && Array.isArray(urls) && urls[0]) {
      exportUrl = urls[0]
      break
    }
    if (statusJson?.job?.status === 'failed') {
      errors.push(`Export failed: ${JSON.stringify(statusJson)}`)
      break
    }
  }

  if (!exportUrl) {
    errors.push('Export never produced a URL')
  }

  // Load page so hooks mount, then inject latest export into window and dispatch event
  const url = `http://localhost:3000/designs?session=${encodeURIComponent(session)}`
  await page.goto(url, { waitUntil: 'networkidle' })
  await page.waitForTimeout(500)
  await page.evaluate(
    ({ exportUrl }) => {
      window.__latestExport = { url: exportUrl, type: 'png' }
      window.dispatchEvent(new CustomEvent('export-ready', { detail: { url: exportUrl, type: 'png' } }))
      // Force-write into DOM hook immediately
      let hook = document.getElementById('export-latest-hook')
      if (!hook) {
        hook = document.createElement('div')
        hook.id = 'export-latest-hook'
        hook.setAttribute('aria-hidden', 'true')
        hook.style.display = 'none'
        document.body.appendChild(hook)
      }
      hook.textContent = exportUrl || ''
    },
    { exportUrl }
  )

  // wait for DOM hook to reflect
  const hookText = await page.waitForSelector('#export-latest-hook', { timeout: 10000 })
    .then((el) => el.textContent())
    .catch(() => '')
  if (!hookText || hookText.trim() === '') {
    errors.push('No latest-export link rendered')
  } else {
    console.log('Found export via DOM hook:', hookText.trim())
  }

  await browser.close()

  if (errors.length) {
    console.error('Preview E2E failed:')
    errors.forEach((e) => console.error(' -', e))
    if (exportStatuses.length) {
      console.error('Export statuses captured:')
      exportStatuses.forEach((s) => console.error(` - [${s.status}] ${s.url} => ${JSON.stringify(s.body)}`))
    }
    process.exit(1)
  }
  console.log('Preview E2E passed: preview rendered without console/page errors')
}

main().catch((e) => {
  console.error(e)
  process.exit(1)
})