import React from 'react';
import _ from 'lodash'
import Chart from 'react-chartjs-2';
import styled from 'styled-components';
import useTheme from '../theme/useTheme';
import useDimensions from '../utility/useDimensions';
import { HorizontalSplitter } from '../widgets/Splitter';
import WidgetColumnBar, { WidgetColumnBarItem } from '../widgets/WidgetColumnBar';
import { FormSelectField } from '../utility/forms';
import { useForm } from '../utility/FormProvider';

const ChartWrapper = styled.div`
  flex: 1;
  overflow: hidden;
`;

const chartData = {
  labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'],
  datasets: [
    {
      label: '# of Votes',
      data: [12, 19, 3, 5, 2, 3],
      backgroundColor: [
        'rgba(255, 99, 132, 0.2)',
        'rgba(54, 162, 235, 0.2)',
        'rgba(255, 206, 86, 0.2)',
        'rgba(75, 192, 192, 0.2)',
        'rgba(153, 102, 255, 0.2)',
        'rgba(255, 159, 64, 0.2)',
      ],
      borderColor: [
        'rgba(255, 99, 132, 1)',
        'rgba(54, 162, 235, 1)',
        'rgba(255, 206, 86, 1)',
        'rgba(75, 192, 192, 1)',
        'rgba(153, 102, 255, 1)',
        'rgba(255, 159, 64, 1)',
      ],
      borderWidth: 1,
    },
  ],
};

function createChartData(freeData, labelColumn, dataColumns) {
  if (!freeData || !labelColumn || !dataColumns || dataColumns.length == 0) return {};
  const labels = _.uniq(freeData.rows.map((x) => x[labelColumn]));
  const res = {
    labels: freeData.rows.map((x) => x[labelColumn]),
    datasets: dataColumns.map((dataColumn) => ({
      label: dataColumn,
      // data: [12, 19, 3, 5, 2, 3],
      data: freeData.rows.map((x) => x[dataColumn]),
      backgroundColor: [
        'rgba(255, 99, 132, 0.2)',
        'rgba(54, 162, 235, 0.2)',
        'rgba(255, 206, 86, 0.2)',
        'rgba(75, 192, 192, 0.2)',
        'rgba(153, 102, 255, 0.2)',
        'rgba(255, 159, 64, 0.2)',
      ],
      borderColor: [
        'rgba(255, 99, 132, 1)',
        'rgba(54, 162, 235, 1)',
        'rgba(255, 206, 86, 1)',
        'rgba(75, 192, 192, 1)',
        'rgba(153, 102, 255, 1)',
        'rgba(255, 159, 64, 1)',
      ],
      borderWidth: 1,
    })),
  };

  return res;
}

export default function DataChart({ data }) {
  const [containerRef, { height: containerHeight, width: containerWidth }] = useDimensions();
  const { values } = useForm();

  const { labelColumn } = values;
  const dataColumns = [];
  for (const key in values) {
    if (key.startsWith('dataColumn_') && values[key]) {
      dataColumns.push(key.substring('dataColumn_'.length));
    }
  }

  return (
    <ChartWrapper ref={containerRef}>
      <Chart
        key={`${values.chartType}|${containerWidth}|${containerHeight}`}
        width={containerWidth}
        height={containerHeight}
        data={createChartData(data, labelColumn, dataColumns)}
        type={values.chartType}
      />
    </ChartWrapper>
  );
}