import { useState, useContext } from 'react';
import { Switch, Box } from '@material-ui/core';
import { ClassNameMap } from '@material-ui/styles';
import { makeStyles } from '@material-ui/core/styles';
import { HeaderText } from '../Text';
import {
  BLUE,
  PURPLE_OFF,
  RED_ON,
  SELECTED_ANVIL,
} from '../../lib/consts/DEFAULT_THEME';
import anvilState from '../../lib/consts/ANVILS';
import { AnvilContext } from '../AnvilContext';

const useStyles = makeStyles(() => ({
  root: {
    width: '100%',
    '&:hover $child': {
      backgroundColor: SELECTED_ANVIL,
    },
  },
  anvilName: {
    paddingLeft: 0,
  },
  decorator: {
    width: '20px',
    height: '100%',
    borderRadius: 2,
  },
  optimal: {
    backgroundColor: BLUE,
  },
  notReady: {
    backgroundColor: PURPLE_OFF,
  },
  degraded: {
    backgroundColor: RED_ON,
  },
}));

const selectDecorator = (
  state: string,
): keyof ClassNameMap<'optimal' | 'notReady' | 'degraded'> => {
  switch (state) {
    case 'optimal':
      return 'optimal';
    case 'not_ready':
      return 'notReady';
    case 'degraded':
      return 'degraded';
    default:
      return 'optimal';
  }
};

const SelectedAnvil = ({ list }: { list: AnvilListItem[] }): JSX.Element => {
  const { uuid } = useContext(AnvilContext);
  const classes = useStyles();
  const [checked, setChecked] = useState<boolean>(true);

  const index = list.findIndex(
    (anvil: AnvilListItem) => anvil.anvil_uuid === uuid,
  );

  return (
    <Box display="flex" flexDirection="row" width="100%">
      {uuid !== '' && (
        <>
          <Box p={1}>
            <div
              className={`${classes.decorator} ${
                classes[selectDecorator(list[index].anvil_state)]
              }`}
            />
          </Box>
          <Box p={1} flexGrow={1} className={classes.anvilName}>
            <HeaderText text={list[index].anvil_name} />
            <HeaderText
              text={
                anvilState.get(list[index].anvil_state) || 'State unavailable'
              }
            />
          </Box>
          <Box p={1}>
            <Switch checked={checked} onChange={() => setChecked(!checked)} />
          </Box>
        </>
      )}
    </Box>
  );
};

export default SelectedAnvil;