import React, { useState, useRef } from 'react';
import { DataGrid } from '@material-ui/data-grid';
import { useTheme } from '@material-ui/core/styles';
import {
  formatDistance, formatHours, formatDate, formatVolume,
} from '../common/formatter';
import ReportFilter from './ReportFilter';
import ReportLayout from './ReportLayout';
import { useAttributePreference } from '../common/preferences';
import { useTranslation } from '../LocalizationProvider';

const Filter = ({ setItems }) => {
  const inputElement = useRef();
  const [data, setData] = useState({url: '', filename: ''});
  
  const handleSubmit = async (deviceId, from, to, mail, headers) => {
    const query = new URLSearchParams({
      deviceId, from, to, mail,
    });
    const response = await fetch(`/api/reports/stops?${query.toString()}`, { headers });
    if (response.ok) {
      const contentType = response.headers.get('content-type');
      if (contentType) {
        if (contentType === 'application/json') {
          setItems(await response.json());
        } else {
          // Copied from /web/app/view/ReportController.js (but without Ext)
          const disposition = response.headers.get('content-disposition');
          const filename = disposition.slice(disposition.indexOf('=') + 1, disposition.length);
          const blob = new Blob([await response.blob()], { type: contentType });
          if (typeof window.navigator.msSaveBlob !== 'undefined') {
            // IE workaround
            window.navigator.msSaveBlob(blob, filename);
          } else {
            const url = window.URL || window.webkitURL;
            const downloadUrl = url.createObjectURL(blob);
            if (filename) {
              setData({url: downloadUrl, filename: filename});
              setTimeout(() => {
                inputElement.current.click();
              }, 100);
            }
            setTimeout(() => {
              url.revokeObjectURL(downloadUrl);
            }, 100);
          }
        }
      }
    }
  };

  return (
    <>
        <a style={{display: 'none'}}
           href={data.url}
           download={data.filename}
           ref={inputElement}
        />
        <ReportFilter handleSubmit={handleSubmit} />
    </>
  );
};

const StopReportPage = () => {
  const theme = useTheme();
  const t = useTranslation();

  const distanceUnit = useAttributePreference('distanceUnit');
  const volumeUnit = useAttributePreference('volumeUnit');

  const [items, setItems] = useState([]);

  const columns = [{
    headerName: t('reportStartTime'),
    field: 'startTime',
    type: 'dateTime',
    width: theme.dimensions.columnWidthDate,
    valueFormatter: ({ value }) => formatDate(value),
  }, {
    headerName: t('positionOdometer'),
    field: 'startOdometer',
    type: 'number',
    width: theme.dimensions.columnWidthNumber,
    valueFormatter: ({ value }) => formatDistance(value, distanceUnit, t),
  }, {
    headerName: t('positionAddress'),
    field: 'address',
    type: 'string',
    hide: true,
    width: theme.dimensions.columnWidthString,
  }, {
    headerName: t('reportEndTime'),
    field: 'endTime',
    type: 'dateTime',
    width: theme.dimensions.columnWidthDate,
    valueFormatter: ({ value }) => formatDate(value),
  }, {
    headerName: t('reportDuration'),
    field: 'duration',
    type: 'string',
    width: theme.dimensions.columnWidthNumber,
    valueFormatter: ({ value }) => formatHours(value, t),
  }, {
    headerName: t('reportEngineHours'),
    field: 'engineHours',
    type: 'string',
    width: theme.dimensions.columnWidthNumber,
    valueFormatter: ({ value }) => formatHours(value, t),
  }, {
    headerName: t('reportSpentFuel'),
    field: 'spentFuel',
    type: 'number',
    width: theme.dimensions.columnWidthNumber,
    hide: true,
    valueFormatter: ({ value }) => formatVolume(value, volumeUnit, t),
  }];

  return (
    <ReportLayout filter={<Filter setItems={setItems} />}>
      <DataGrid
        rows={items}
        columns={columns}
        hideFooter
        autoHeight
        getRowId={() => Math.random()}
      />
    </ReportLayout>
  );
};

export default StopReportPage;