import { chromium } from '@playwright/test'

/**
 * 用**正确阈值**重测。
 * 之前的探针用 r<246 判"深色"，而表头底色是 245 → 被误判成线。
 * 边框线是 217，白底是 255，表头灰是 245。
 * 正确判据：只看接近 217 的像素（容差 ±6），把 245 和 255 都当作"非线"。
 */
const BASE = process.env.PROBE_URL || 'http://localhost:5200'
const LINE = 217
const TOL = 6

const isLine = ([r, g, b]) =>
  Math.abs(r - LINE) <= TOL && Math.abs(g - LINE) <= TOL && Math.abs(b - LINE) <= TOL

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')}`)
}

const heights = [500, 400, 350, 300, 250, 200, 180, 160, 150, 140, 130, 120, 110, 100, 90, 80]

console.log('=== 正确阈值（只认 217±6，245/255 均视为非线）===')
console.log('容器高 | 底边像素(217线) | 线数 | 判定')
let bad = 0
for (const h of heights) {
  await page.evaluate((hh) => {
    document.querySelector('[data-testid="table-big-wrap"]').style.height = `${hh}px`
  }, h)
  await page.waitForTimeout(420)
  await page.locator('[data-testid="table-big-wrap"]').scrollIntoViewIfNeeded()
  await page.waitForTimeout(180)

  const g = await page.evaluate(() => {
    const wrap = document.querySelector('[data-testid="table-big-wrap"]')
    const root = wrap.querySelector('.g3-table')
    const r = root.getBoundingClientRect()
    return { left: Math.round(r.left), bottom: Math.round(r.bottom) }
  })
  const y = Math.max(0, g.bottom - 5)
  if (1200 - y < 12) continue
  const px = await clipSample(g.left + 300, y, 1, 12)
  const vec = px.map((p) => (isLine(p) ? 1 : 0))
  const n = vec.reduce((a, b) => a + b, 0)
  if (n !== 1) bad += 1
  console.log(
    `${String(h).padStart(6)} | ${vec.join('')} | ${String(n).padStart(4)} | ${n === 1 ? '✅ 一条线' : n === 0 ? '❌ 缺线' : '❌ ' + n + ' 条'}`,
  )
}
console.log(`\n失败档位: ${bad} 个`)

await browser.close()