import PropTypes from "prop-types";
import { PureComponent } from "react";

import { FormattedMessage } from "react-intl";

import ImmutablePropTypes from "react-immutable-proptypes";
import { connect } from "react-redux";

import { fetchTrendingLinks } from "mastodon/actions/trends";
import { DismissableBanner } from "mastodon/components/dismissable_banner";
import { LoadingIndicator } from "mastodon/components/loading_indicator";

import Story from "./components/story";

const mapStateToProps = state => ({
  links: state.getIn(["trends", "links", "items"]),
  isLoading: state.getIn(["trends", "links", "isLoading"]),
});

class Links extends PureComponent {

  static propTypes = {
    links: ImmutablePropTypes.list,
    isLoading: PropTypes.bool,
    dispatch: PropTypes.func.isRequired,
  };

  componentDidMount () {
    const { dispatch } = this.props;
    dispatch(fetchTrendingLinks());
  }

  render () {
    const { isLoading, links } = this.props;

    const banner = (
      <DismissableBanner id='explore/links'>
        <FormattedMessage id='dismissable_banner.explore_links' defaultMessage='These are news stories being shared the most on the social web today. Newer news stories posted by more different people are ranked higher.' />
      </DismissableBanner>
    );

    if (!isLoading && links.isEmpty()) {
      return (
        <div className='explore__links scrollable scrollable--flex'>
          {banner}

          <div className='empty-column-indicator'>
            <FormattedMessage id='empty_column.explore_statuses' defaultMessage='Nothing is trending right now. Check back later!' />
          </div>
        </div>
      );
    }

    return (
      <div className='explore__links scrollable' data-nosnippet>
        {banner}

        {isLoading ? (<LoadingIndicator />) : links.map((link, i) => (
          <Story
            key={link.get("id")}
            expanded={i === 0}
            lang={link.get("language")}
            url={link.get("url")}
            title={link.get("title")}
            publisher={link.get("provider_name")}
            publishedAt={link.get("published_at")}
            author={link.get("author_name")}
            sharedTimes={link.getIn(["history", 0, "accounts"]) * 1 + link.getIn(["history", 1, "accounts"]) * 1}
            thumbnail={link.get("image")}
            thumbnailDescription={link.get("image_description")}
            blurhash={link.get("blurhash")}
          />
        ))}
      </div>
    );
  }

}

export default connect(mapStateToProps)(Links);