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import { Chart } from '@antv/g2';

function css(...styles) {
  return styles
    .map((obj) =>
      Object.entries(obj)
        .map(([k, v]) => k + ':' + v)
        .join(';'),
    )
    .join(';');
}

const chart = new Chart({
  container: 'container',
  autoFit: true,
});

chart.options({
  type: 'interval',
  data: {
    type: 'fetch',
    value:
      'https://gw.alipayobjects.com/os/bmw-prod/fb9db6b7-23a5-4c23-bbef-c54a55fee580.csv',
  },
  encode: { x: 'letter', y: 'frequency' },
  axis: { y: { labelFormatter: '.0%' } },
  interaction: {
    tooltip: {
      disableNative: true, // Disable pointerover and pointerout events.
      bounding: {
        x: -Infinity,
        y: -Infinity,
        width: Infinity,
        height: Infinity,
      },
      css: {
        '.g2-tooltip': {
          background: 'transparent',
          'box-shadow': 'none',
          transform: 'translate(-50%, -100%)',
        },
      },
      offset: [0, -10],
      mount: 'body',
      render: (event, { title, items }) => {
        const plot = chart
          .getContext()
          .canvas.document.getElementsByClassName('plot')[0];
        const plotBounds = plot.getRenderBounds();
        const target = event.target;
        const bounds = target.getRenderBounds();
        const height = bounds.min[1] - plotBounds.min[1];
        return `<div>
        <div style="${css({
          position: 'relative',
          background: '#fff',
          'box-shadow': '0 6px 12px 0 rgba(0, 0, 0, 0.12)',
          'z-index': 999,
          padding: '12px',
          'min-width': '120px',
        })}">
          <h2
            style="${css({
              'margin-bottom': '9px',
              'font-size': '18px',
              'line-height': '30px',
              'font-weight': '500px',
            })}"
          >
            Letter: ${title}
          </h2>
          ${items
            .map(
              (item) =>
                `<div style="font-size: 16px; color: #666">
                  <span style="${css({
                    height: '10px',
                    width: '10px',
                    background: item.color,
                    display: 'inline-block',
                    'border-radius': '50%',
                  })}"></span>
                  <span>${item.name}</span>
                  <span>${item.value}</span>
                </div>`,
            )
            .join('')}
        </div>
        <div style="${css({
          width: '1px',
          height: height + 'px',
          background: '#aaa',
          position: 'absolute',
          left: '50%',
          top: '90%',
          'z-index': 500,
        })}"></div>
      </div>`;
      },
    },
  },
});

chart.on('element:click', ({ data }) =>
  chart.emit('tooltip:show', {
    data,
    offsetY: 0,
  }),
);

chart.on('plot:click', () => chart.emit('tooltip:hide'));

chart.render();