<template>
  <div>
    <div id="chart">
      <apexchart
        type="rangeBar"
        height="350"
        :options="chartOptions"
        :series="series"
      ></apexchart>
    </div>
  </div>
</template>

<script>
import VueApexCharts from 'vue-apexcharts'

export default {
  components: {
    apexchart: VueApexCharts,
  },
  data: function () {
    return {
      series: [
        {
          name: 'Frontend',
          data: [
            {
              x: 'Design',
              y: [
                new Date('2024-03-05').getTime(),
                new Date('2024-03-08').getTime(),
              ],
            },
            {
              x: 'Code',
              y: [
                new Date('2024-03-08').getTime(),
                new Date('2024-03-11').getTime(),
              ],
            },
            {
              x: 'Test',
              y: [
                new Date('2024-03-11').getTime(),
                new Date('2024-03-16').getTime(),
              ],
            },
          ],
        },
        {
          name: 'Backend',
          data: [
            {
              x: 'Design',
              y: [
                new Date('2024-03-02').getTime(),
                new Date('2024-03-05').getTime(),
              ],
            },
            {
              x: 'Code',
              y: [
                new Date('2024-03-06').getTime(),
                new Date('2024-03-09').getTime(),
              ],
            },
            {
              x: 'Test',
              y: [
                new Date('2024-03-10').getTime(),
                new Date('2024-03-19').getTime(),
              ],
            },
          ],
        },
      ],
      chartOptions: {
        chart: {
          height: 350,
          type: 'rangeBar',
        },
        title: {
          text: 'Frontend vs Backend Schedule',
        },
        plotOptions: {
          bar: {
            borderRadius: 10,
            horizontal: true,
          },
        },
        dataLabels: {
          enabled: true,
          formatter: function (val) {
            var diff = Math.round((val[1] - val[0]) / (1000 * 60 * 60 * 24))
            return diff + (diff > 1 ? ' days' : ' day')
          },
        },
        fill: {
          type: 'gradient',
          gradient: {
            shade: 'light',
            type: 'vertical',
            shadeIntensity: 0.25,
            gradientToColors: undefined,
            inverseColors: true,
            opacityFrom: 1,
            opacityTo: 1,
            stops: [50, 0, 100, 100],
          },
        },
        xaxis: {
          type: 'datetime',
        },
        legend: {
          position: 'top',
        },
      },
    }
  },
}
</script>

<style>
#chart {
  max-width: 650px;
  margin: 35px auto;
}
</style>