import React, { useState } from 'react';
import MainToolbar from '../MainToolbar';
import { TableContainer, Table, TableRow, TableCell, TableHead, TableBody, makeStyles, IconButton } from '@material-ui/core';
import MoreVertIcon from '@material-ui/icons/MoreVert';
import { useSelector } from 'react-redux';
import t from '../common/localization';
import { useEffectAsync } from '../reactHelper';
import EditCollectionView from '../EditCollectionView';
import OptionsLayout from './OptionsLayout';

const useStyles = makeStyles(theme => ({
  columnAction: {
    width: theme.spacing(1),
    padding: theme.spacing(0, 1)
  }
}));

const ComputedAttributeView = ({ updateTimestamp, onMenuClick }) => {
  const classes = useStyles();

  const [items, setItems] = useState([]);
  const adminEnabled = useSelector(
    state => state.session.user && state.session.user.administrator
  );

  useEffectAsync(async () => {
    const response = await fetch('/api/attributes/computed');
    if (response.ok) {
      setItems(await response.json());
    }
  }, [updateTimestamp]);

  return (
    <TableContainer>
    <Table>
      <TableHead>
        <TableRow>
          {adminEnabled && <TableCell className={classes.columnAction} />}
          <TableCell>{t('sharedDescription')}</TableCell>
          <TableCell>{t('sharedAttribute')}</TableCell>
          <TableCell>{t('sharedExpression')}</TableCell>
          <TableCell>{t('sharedType')}</TableCell>
        </TableRow>
      </TableHead>
      <TableBody>
          {items.map(item => (
          <TableRow key={item.id}>
              {adminEnabled && (
              <TableCell className={classes.columnAction} padding="none">
                  <IconButton
                    onClick={event => onMenuClick(event.currentTarget, item.id)}
                  >
                  <MoreVertIcon />
                </IconButton>
              </TableCell>
              )}
            <TableCell>{item.description}</TableCell>
            <TableCell>{item.attribute}</TableCell>
            <TableCell>{item.expression}</TableCell>
            <TableCell>{item.type}</TableCell>            
          </TableRow>
        ))}
      </TableBody>
    </Table>
    </TableContainer>
  );
};

const ComputedAttributesPage = () => {
  return (
    <OptionsLayout>
      <EditCollectionView
        content={ComputedAttributeView}
        editPath="/settings/attribute"
        endpoint="attributes/computed"
      />
    </OptionsLayout>
  );
};

export default ComputedAttributesPage;