import classNames from 'classnames';
import { colord } from 'colord';
import BarChart from '@/components/charts/BarChart';
import PieChart from '@/components/charts/PieChart';
import TypeIcon from '@/components/common/TypeIcon';
import { useCountryNames, useLocale, useMessages } from '@/components/hooks';
import { GridRow } from '@/components/layout/Grid';
import ListTable from '@/components/metrics/ListTable';
import MetricCard from '@/components/metrics/MetricCard';
import MetricsBar from '@/components/metrics/MetricsBar';
import { renderDateLabels } from '@/lib/charts';
import { CHART_COLORS } from '@/lib/constants';
import { formatLongCurrency, formatLongNumber } from '@/lib/format';
import { useCallback, useContext, useMemo } from 'react';
import { ReportContext } from '../[reportId]/Report';
import AttributionTable from './AttributionTable';
import styles from './AttributionView.module.css';

export interface AttributionViewProps {
  isLoading?: boolean;
}

export function AttributionView({ isLoading }: AttributionViewProps) {
  const { formatMessage, labels } = useMessages();
  const { locale } = useLocale();
  const { countryNames } = useCountryNames(locale);
  const { report } = useContext(ReportContext);
  const {
    data,
    parameters: { dateRange, currency },
  } = report || {};
  const showTable = data?.table.length > 1;

  const renderCountryName = useCallback(
    ({ x: code }) => (
      <span className={classNames(locale, styles.row)}>
        <TypeIcon type="country" value={code?.toLowerCase()} />
        {countryNames[code]}
      </span>
    ),
    [countryNames, locale],
  );

  const chartData = useMemo(() => {
    if (!data) return [];

    const map = (data.chart as any[]).reduce((obj, { x, t, y }) => {
      if (!obj[x]) {
        obj[x] = [];
      }

      obj[x].push({ x: t, y });

      return obj;
    }, {});

    return {
      datasets: Object.keys(map).map((key, index) => {
        const color = colord(CHART_COLORS[index % CHART_COLORS.length]);
        return {
          label: key,
          data: map[key],
          lineTension: 0,
          backgroundColor: color.alpha(0.6).toRgbString(),
          borderColor: color.alpha(0.7).toRgbString(),
          borderWidth: 1,
        };
      }),
    };
  }, [data]);

  const countryData = useMemo(() => {
    if (!data) return [];

    const labels = data.country.map(({ name }) => name);
    const datasets = [
      {
        data: data.country.map(({ value }) => value),
        backgroundColor: CHART_COLORS,
        borderWidth: 0,
      },
    ];

    return { labels, datasets };
  }, [data]);

  const metricData = useMemo(() => {
    if (!data) return [];

    const { sum, count, unique_count } = data.total;

    return [
      {
        value: sum,
        label: formatMessage(labels.total),
        formatValue: n => formatLongCurrency(n, currency),
      },
      {
        value: count ? sum / count : 0,
        label: formatMessage(labels.average),
        formatValue: n => formatLongCurrency(n, currency),
      },
      {
        value: count,
        label: formatMessage(labels.transactions),
        formatValue: formatLongNumber,
      },
      {
        value: unique_count,
        label: formatMessage(labels.uniqueCustomers),
        formatValue: formatLongNumber,
      },
    ] as any;
  }, [data, locale]);

  return (
    <>
      <div className={styles.container}>
        <MetricsBar isFetched={data}>
          {metricData?.map(({ label, value, formatValue }) => {
            return <MetricCard key={label} value={value} label={label} formatValue={formatValue} />;
          })}
        </MetricsBar>
        {data && (
          <>
            <BarChart
              minDate={dateRange?.startDate}
              maxDate={dateRange?.endDate}
              data={chartData}
              unit={dateRange?.unit}
              stacked={true}
              currency={currency}
              renderXLabel={renderDateLabels(dateRange?.unit, locale)}
              isLoading={isLoading}
            />
            <GridRow columns="two">
              <ListTable
                metric={formatMessage(labels.country)}
                data={data?.country.map(({ name, value }) => ({
                  x: name,
                  y: Number(value),
                  z: (value / data?.total.sum) * 100,
                }))}
                renderLabel={renderCountryName}
              />
              <PieChart type="doughnut" data={countryData} />
            </GridRow>
          </>
        )}
        {showTable && <AttributionTable />}
      </div>
    </>
  );
}

export default AttributionView;