const https = require('https')
const URL = 'https://www.binance.com/bapi/composite/v1/public/marketing/symbol/list'

const roundSmall = (n) => {
  const log10 = n ? Math.floor(Math.log10(n)) : 0, div = log10 < 0 ? Math.pow(10, 1 - log10) : 100;
  return Math.round(n * div) / div;
}

const formatResponse = token => ({
  'Rank': token.rank,
  'Name': token.name,
  'Full name': token.fullName,
  'Price': '€'+(token.price<0.1?roundSmall(token.price):token.price.toFixed(2)),
  'Last 24h': token.dayChange.toFixed(2)+'%',
  'Market Cap': '€'+Math.round(token.marketCap),
  'Circulating': token.totalSupply ? Math.round(token.circulatingSupply/token.totalSupply*100)+'%' : '-',
  'Total': token.maxSupply ? Math.round(token.totalSupply/token.maxSupply*100)+'%' : '-'
})

const getResponse = (url) => https.get(url, res => {
  let response = ''
  res.on('data', data => { response += data })
  res.on('end', () => { handleResponse(response) })
  res.on('error', err => { console.error(err) })
})

const handleResponse = (response) => {
  const list = JSON.parse(response)
  const processed = list.data
    .filter(token => token.rank && token.rank <= 40)
    .map(formatResponse)

  render(processed)
}

const render = (processed) => {
  const paddings = Object.keys(processed[0]).map(key => {
    const longest = processed.sort((a,b) => b[key].length - a[key].length)[0][key]
    return longest.length > key.length ? longest.length : key.length
  })
  const header = '| '+Object.keys(processed[0]).map((el, i) => el.padStart(paddings[i])).join(' | ')+' |'
  const line = '+'+Array(header.length-1).join('-')+'+'

  console.log(line+'\n\x1b[1m'+header+'\x1b[0m\n'+line)
  processed
    .sort((a, b) => a.Rank - b.Rank)
    .forEach(row => {
      const color = `\x1b[${Number(row['Last 24h'].slice(0, -1))<0?31:32}m`
      console.log('| '+color+Object.values(row).map((el, i) => el.toString().padStart(paddings[i])).join('\x1b[0m | '+color)+'\x1b[0m |')
    })
  console.log(line)
}

getResponse(URL)