content: import React from 'react';
  import PropTypes from 'prop-types';
  import Immutable from 'immutable';
  import ImmutablePropTypes from 'react-immutable-proptypes';
  import punycode from 'punycode';
  import classnames from 'classnames';
  
  const IDNA_PREFIX = 'xn--';
  
  const decodeIDNA = domain => {
    return domain
      .split('.')
      .map(part => part.indexOf(IDNA_PREFIX) === 0 ? punycode.decode(part.slice(IDNA_PREFIX.length)) : part)
      .join('.');
  };
  
  const getHostname = url => {
    const parser = document.createElement('a');
    parser.href = url;
    return parser.hostname;
  };
  
  const trim = (text, len) => {
    const cut = text.indexOf(' ', len);
  
    if (cut === -1) {
      return text;
    }
  
    return text.substring(0, cut) + (text.length > len ? '…' : '');
  };
  
  const domParser = new DOMParser();
  
  const addAutoPlay = html => {
    const document = domParser.parseFromString(html, 'text/html').documentElement;
    const iframe = document.querySelector('iframe');
  
    if (iframe) {
      if (iframe.src.indexOf('?') !== -1) {
        iframe.src += '&';
      } else {
        iframe.src += '?';
      }
  
      iframe.src += 'autoplay=1&auto_play=1';
  
      // DOM parser creates html/body elements around original HTML fragment,
      // so we need to get innerHTML out of the body and not the entire document
      return document.querySelector('body').innerHTML;
    }
  
    return html;
  };
  
  export default class Card extends React.PureComponent {
  
    static propTypes = {
      card: ImmutablePropTypes.map,
      maxDescription: PropTypes.number,
      onOpenMedia: PropTypes.func.isRequired,
    };
  
    static defaultProps = {
      maxDescription: 50,
    };
  
    state = {
      width: 280,
      embedded: false,
    };
  
    componentWillReceiveProps (nextProps) {
      if (this.props.card !== nextProps.card) {
        this.setState({ embedded: false });
      }
    }
  
    handlePhotoClick = () => {
      const { card, onOpenMedia } = this.props;
  
      onOpenMedia(
        Immutable.fromJS([
          {
            type: 'image',
            url: card.get('embed_url'),
            description: card.get('title'),
            meta: {
              original: {
                width: card.get('width'),
                height: card.get('height'),
              },
            },
          },
        ]),
        0
      );
    };
  
    handleEmbedClick = () => {
      const { card } = this.props;
  
      if (card.get('type') === 'photo') {
        this.handlePhotoClick();
      } else {
        this.setState({ embedded: true });
      }
    }
  
    setRef = c => {
      if (c) {
        this.setState({ width: c.offsetWidth });
      }
    }
  
    renderVideo () {
      const { card }  = this.props;
      const content   = { __html: addAutoPlay(card.get('html')) };
      const { width } = this.state;
      const ratio     = card.get('width') / card.get('height');
      const height    = card.get('width') > card.get('height') ? (width / ratio) : (width * ratio);
  
      return (
        <div
          ref={this.setRef}
          className='status-card__image status-card-video'
          dangerouslySetInnerHTML={content}
          style={{ height }}
        />
      );
    }
  
    render () {
      const { card, maxDescription } = this.props;
      const { width, embedded }      = this.state;
  
      if (card === null) {
        return null;
      }
  
      const provider    = card.get('provider_name').length === 0 ? decodeIDNA(getHostname(card.get('url'))) : card.get('provider_name');
      const horizontal  = card.get('width') > card.get('height') && (card.get('width') + 100 >= width) || card.get('type') !== 'link';
      const className   = classnames('status-card', { horizontal });
      const interactive = card.get('type') !== 'link';
      const title       = interactive ? <a className='status-card__title' href={card.get('url')} title={card.get('title')} rel='noopener' target='_blank'><strong>{card.get('title')}</strong></a> : <strong className='status-card__title' title={card.get('title')}>{card.get('title')}</strong>;
      const ratio       = card.get('width') / card.get('height');
      const height      = card.get('width') > card.get('height') ? (width / ratio) : (width * ratio);
  
      const description = (
        <div className='status-card__content'>
          {title}
          {!horizontal && <p className='status-card__description'>{trim(card.get('description') || '', maxDescription)}</p>}
          <span className='status-card__host'>{provider}</span>
        </div>
      );
  
      let embed     = '';
      let thumbnail = <div style={{ backgroundImage: `url(${card.get('image')})`, width: horizontal ? width : null, height: horizontal ? height : null }} className='status-card__image-image' />;
  
      if (interactive) {
        if (embedded) {
          embed = this.renderVideo();
        } else {
          let iconVariant = 'play';
  
          if (card.get('type') === 'photo') {
            iconVariant = 'search-plus';
          }
  
          embed = (
            <div className='status-card__image'>
              {thumbnail}
  
              <div className='status-card__actions'>
                <div>
                  <button onClick={this.handleEmbedClick}><i className={`fa fa-${iconVariant}`} /></button>
                  <a href={card.get('url')} target='_blank' rel='noopener'><i className='fa fa-external-link' /></a>
                </div>
              </div>
            </div>
          );
        }
  
        return (
          <div className={className} ref={this.setRef}>
            {embed}
            {description}
          </div>
        );
      } else if (card.get('image')) {
        embed = (
          <div className='status-card__image'>
            {thumbnail}
          </div>
        );
      }
  
      return (
        <a href={card.get('url')} className={className} target='_blank' rel='noopener' ref={this.setRef}>
          {embed}
          {description}
        </a>
      );
    }
  
  }
  