/**
 * NOTE: install "dark mode" on browser because tesseract need contract to detect text
 * NOTE: zoom 120% on browser because below
 */

const screenshot = require('screenshot-desktop') // capture screen
const robotjs = require('robotjs')
const tesseract = require('tesseract.js')
const jsdom = require('jsdom')

const KEYWORD = 'ebay.com'

async function handleToClick(keywordToClick, fileScreenshot = 'screenshot.jpg') {
  if(!fileScreenshot) {
    fileScreenshot = 'screenshot.jpg'
  }

  const _randomInteger = (min, max) => {
    return Math.floor(Math.random() * (max - min + 1)) + min;
  }

  return new Promise((res, rej) => {
    screenshot({filename: fileScreenshot}).then((imgPath) => {
      tesseract.recognize(imgPath)
        .then(({data: {hocr, text}}) => {
          console.log({hocr, text})
          const dom = new jsdom.JSDOM(hocr)
          const spanEls = dom.window.document.querySelectorAll('span')
          for(let i = 0; i < spanEls.length; i++) {
            const span = spanEls[i];
            const text = span.textContent.split(' ').join('')
            if(text.includes(keywordToClick)) {
              const [type, left, bottom, right, top] = span.title.split(' ')
              robotjs.moveMouse(
                _randomInteger(10, 50) + parseInt(left), // randomInteger is prefix depreciation
                parseInt(top),
              )
              robotjs.mouseClick()
              console.log(text)
              return res(true)
            }
          }
          return rej(false)
        })
    })
  });
}

(function recusiveScroll(countScroll = 0, limitStopScroll = 20) {
  if(countScroll > limitStopScroll) {
    return;
  }
  const [x, y] = [0, -3]

  handleToClick(KEYWORD).catch(() => {
    recusiveScroll(++countScroll, limitStopScroll)
  }).finally(() => {
    robotjs.scrollMouse(x, y)
  })
}())