/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import React from 'react';
import PropTypes from 'prop-types';
import Mousetrap from 'mousetrap';
import { OverlayTrigger, Popover } from 'react-bootstrap';

const propTypes = {
  hotkeys: PropTypes.arrayOf(
    PropTypes.shape({
      key: PropTypes.string.isRequired,
      descr: PropTypes.string.isRequired,
      func: PropTypes.func,
    }),
  ).isRequired,
  header: PropTypes.string,
  placement: PropTypes.string,
};

const defaultProps = {
  hotkeys: [],
};

export default class Hotkeys extends React.PureComponent {
  componentDidMount() {
    this.props.hotkeys.forEach(keyConfig => {
      if (keyConfig.func) {
        Mousetrap.bind([keyConfig.key], keyConfig.func);
      }
    });
  }
  renderPopover() {
    const { header, hotkeys } = this.props;
    return (
      <Popover id="hotkey-popover" title={header} style={{ width: '300px' }}>
        <table className="table table-condensed">
          <thead>
            <tr>
              <th>Key</th>
              <th>Action</th>
            </tr>
          </thead>
          <tbody>
            {hotkeys.map(({ key, descr }) => (
              <tr key={key}>
                <td>
                  <code>{key}</code>
                </td>
                <td>{descr}</td>
              </tr>
            ))}
          </tbody>
        </table>
      </Popover>
    );
  }
  render() {
    return (
      <OverlayTrigger
        overlay={this.renderPopover()}
        trigger={['hover', 'focus']}
        placement={this.props.placement || 'top'}
      >
        <i className="fa fa-keyboard-o fa-lg" />
      </OverlayTrigger>
    );
  }
}

Hotkeys.propTypes = propTypes;
Hotkeys.defaultProps = defaultProps;
