import React, { useMemo } from 'react';
import classNames from 'classnames';
import PageviewsChart from './PageviewsChart';
import MetricsBar from './MetricsBar';
import WebsiteHeader from './WebsiteHeader';
import DateFilter from 'components/common/DateFilter';
import StickyHeader from 'components/helpers/StickyHeader';
import Button from 'components/common/Button';
import useFetch from 'hooks/useFetch';
import useDateRange from 'hooks/useDateRange';
import useTimezone from 'hooks/useTimezone';
import usePageQuery from 'hooks/usePageQuery';
import { getDateArray, getDateLength } from 'lib/date';
import Times from 'assets/times.svg';
import styles from './WebsiteChart.module.css';
import ErrorMessage from '../common/ErrorMessage';

export default function WebsiteChart({
  websiteId,
  token,
  title,
  stickyHeader = false,
  showLink = false,
  onDataLoad = () => {},
}) {
  const [dateRange, setDateRange] = useDateRange(websiteId);
  const { startDate, endDate, unit, value, modified } = dateRange;
  const [timezone] = useTimezone();
  const {
    router,
    resolve,
    query: { url },
  } = usePageQuery();

  const { data, loading, error } = useFetch(
    `/api/website/${websiteId}/pageviews`,
    {
      params: {
        start_at: +startDate,
        end_at: +endDate,
        unit,
        tz: timezone,
        url,
        token,
      },
      onDataLoad,
    },
    [modified],
  );

  const chartData = useMemo(() => {
    if (data) {
      return {
        pageviews: getDateArray(data.pageviews, startDate, endDate, unit),
        sessions: getDateArray(data.sessions, startDate, endDate, unit),
      };
    }
    return { pageviews: [], sessions: [] };
  }, [data]);

  function handleCloseFilter() {
    router.push(resolve({ url: undefined }));
  }

  return (
    <div className={styles.container}>
      <WebsiteHeader websiteId={websiteId} token={token} title={title} showLink={showLink} />
      <div className={classNames(styles.header, 'row')}>
        <StickyHeader
          className={classNames(styles.metrics, 'col row')}
          stickyClassName={styles.sticky}
          enabled={stickyHeader}
        >
          {url && <PageFilter url={url} onClick={handleCloseFilter} />}
          <div className="col-12 col-lg-9">
            <MetricsBar websiteId={websiteId} token={token} />
          </div>
          <div className={classNames(styles.filter, 'col-12 col-lg-3')}>
            <DateFilter
              value={value}
              startDate={startDate}
              endDate={endDate}
              onChange={setDateRange}
            />
          </div>
        </StickyHeader>
      </div>
      <div className="row">
        <div className="col">
          {error && <ErrorMessage />}
          <PageviewsChart
            websiteId={websiteId}
            data={chartData}
            unit={unit}
            records={getDateLength(startDate, endDate, unit)}
            loading={loading}
          />
        </div>
      </div>
    </div>
  );
}

const PageFilter = ({ url, onClick }) => {
  return (
    <div className={classNames(styles.url, 'col-12')}>
      <Button icon={<Times />} onClick={onClick} variant="action" iconRight>
        {url}
      </Button>
    </div>
  );
};