import { chromium } from '@playwright/test'

/**
 * 真正的滚动场景复现：行数固定（多到溢出），容器高度在「行高之和」附近连续变化。
 * 这才是用户说的「表格高度 <= 行高之和」——内容溢出并出现滚动条。
 */
const BASE = process.env.PROBE_URL || 'http://localhost:5200'
const browser = await chromium.launch()
const page = await browser.newPage({ viewport: { width: 1400, height: 1200 } })
await page.goto(BASE, { waitUntil: 'networkidle' })

const clipSample = async (x, y, w, h) => {
  const shot = await page.screenshot({ clip: { x, y, width: w, height: h } })
  return page.evaluate(async (dataUrl) => {
    const img = new Image()
    await new Promise((res) => {
      img.onload = res
      img.src = dataUrl
    })
    const cv = document.createElement('canvas')
    cv.width = img.width
    cv.height = img.height
    const ctx = cv.getContext('2d')
    ctx.drawImage(img, 0, 0)
    const d = ctx.getImageData(0, 0, img.width, img.height).data
    const out = []
    for (let i = 0; i < d.length; i += 4) out.push([d[i], d[i + 1], d[i + 2]])
    return out
  }, `data:image/png;base64,${shot.toString('base64')}`)
}

// 用 5000 行的 table-big（真实滚动）扫高度
// 表头 34 + 行 30×N；这里固定用大数据量表，只改容器高度
const heights = [500, 400, 300, 250, 200, 180, 160, 150, 140, 130, 120, 110, 100]

console.log('=== table-big（5000 行，真实滚动）扫容器高度 ===')
for (const h of heights) {
  await page.evaluate((hh) => {
    document.querySelector('[data-testid="table-big-wrap"]').style.height = `${hh}px`
  }, h)
  await page.waitForTimeout(450)
  await page.locator('[data-testid="table-big-wrap"]').scrollIntoViewIfNeeded()
  await page.waitForTimeout(200)

  const g = await page.evaluate(() => {
    const wrap = document.querySelector('[data-testid="table-big-wrap"]')
    const root = wrap.querySelector('.g3-table')
    const inner = wrap.querySelector('.stk-table')
    const r = root.getBoundingClientRect()
    const rows = [...wrap.querySelectorAll('.stk-tbody-main tr')]
    const last = rows[rows.length - 1]
    return {
      left: Math.round(r.left),
      bottom: Math.round(r.bottom),
      bodyFill: root.classList.contains('is-body-fill'),
      scrollH: inner.scrollHeight,
      clientH: inner.clientHeight,
      lastRowBottom: last ? Math.round(last.getBoundingClientRect().bottom) : null,
      innerBottom: (() => {
        const ir = inner.getBoundingClientRect()
        return Math.round(ir.bottom)
      })(),
    }
  })

  const y = Math.max(0, g.bottom - 4)
  if (1200 - y < 10) {
    console.log(`h=${h} 超出视口`)
    continue
  }
  const px = await clipSample(g.left + 300, y, 1, 10)
  const vec = px.map(([r, gg, b]) => (r < 246 || gg < 246 || b < 246 ? 1 : 0))
  const n = vec.reduce((a, b) => a + b, 0)
  console.log(
    `h=${String(h).padStart(3)} fill=${String(g.bodyFill).padStart(5)} lastRowBottom=${String(g.lastRowBottom).padStart(5)} innerBottom=${String(g.innerBottom).padStart(5)}  底部 ${vec.join('')} (${n}条) ${n === 1 ? '✅' : '❌'}`,
  )
}

await browser.close()