import { withStyles } from '@material-ui/core/styles';
import gql from 'graphql-tag';
import React from 'react';
import Author from '../Author';
import Date from '../Date';
import Label from '../Label';

const styles = theme => ({
  main: {
    ...theme.typography.body2,
  },
});

const LabelChange = ({ op, classes }) => {
  const { added, removed } = op;
  return (
    <div className={classes.main}>
      <Author author={op.author} bold />
      {added.length > 0 && <span> added the </span>}
      {added.map((label, index) => (
        <Label key={index} label={label} />
      ))}
      {added.length > 0 && removed.length > 0 && <span> and</span>}
      {removed.length > 0 && <span> removed the </span>}
      {removed.map((label, index) => (
        <Label key={index} label={label} />
      ))}
      <span>
        {' '}
        label
        {added.length + removed.length > 1 && 's'}{' '}
      </span>
      <Date date={op.date} />
    </div>
  );
};

LabelChange.fragment = gql`
  fragment LabelChange on Operation {
    ... on LabelChangeOperation {
      date
      author {
        name
        email
      }
      added
      removed
    }
  }
`;

export default withStyles(styles)(LabelChange);