// Seeded PRNG so the bubbles are identical on every load (stable snapshots).
var __seed = 0x7ab19c3d
function rand() {
  __seed |= 0
  __seed = (__seed + 0x6d2b79f5) | 0
  var t = Math.imul(__seed ^ (__seed >>> 15), 1 | __seed)
  t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t
  return ((t ^ (t >>> 14)) >>> 0) / 4294967296
}

// Each point is [revenue $M, growth %, headcount]. The third value is the
// bubble size, so a bigger bubble = a bigger workforce.
function generateData(count, xrange, yrange, zrange) {
  var series = []
  for (var i = 0; i < count; i++) {
    var x = Math.floor(rand() * (xrange.max - xrange.min + 1)) + xrange.min
    var y = Math.floor(rand() * (yrange.max - yrange.min + 1)) + yrange.min
    var z = Math.floor(rand() * (zrange.max - zrange.min + 1)) + zrange.min
    series.push([x, y, z])
  }
  return series
}

var options = {
  series: [
    {
      name: 'SaaS',
      data: generateData(
        12,
        { min: 20, max: 200 },
        { min: 25, max: 65 },
        { min: 20, max: 60 },
      ),
    },
    {
      name: 'Retail',
      data: generateData(
        12,
        { min: 150, max: 480 },
        { min: 5, max: 30 },
        { min: 40, max: 75 },
      ),
    },
    {
      name: 'Fintech',
      data: generateData(
        12,
        { min: 60, max: 320 },
        { min: 15, max: 50 },
        { min: 15, max: 55 },
      ),
    },
    {
      name: 'Hardware',
      data: generateData(
        12,
        { min: 100, max: 400 },
        { min: 2, max: 20 },
        { min: 30, max: 70 },
      ),
    },
  ],
  chart: {
    height: 350,
    type: 'bubble',
  },
  dataLabels: {
    enabled: false,
  },
  fill: {
    opacity: 0.8,
  },
  title: {
    text: 'Companies: Revenue vs Growth',
  },
  subtitle: {
    text: 'Bubble size = headcount',
  },
  xaxis: {
    tickAmount: 10,
    type: 'numeric',
    min: 0,
    max: 500,
    title: {
      text: 'Revenue ($M)',
    },
  },
  yaxis: {
    max: 70,
    title: {
      text: 'YoY Growth (%)',
    },
  },
}

var chart = new ApexCharts(document.querySelector('#chart'), options)
chart.render()