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 { debounce } from "lodash";

import { fetchTrendingStatuses, expandTrendingStatuses } from "mastodon/actions/trends";
import { DismissableBanner } from "mastodon/components/dismissable_banner";
import StatusList from "mastodon/components/status_list";
import { getStatusList } from "mastodon/selectors";

const mapStateToProps = state => ({
  statusIds: getStatusList(state, "trending"),
  isLoading: state.getIn(["status_lists", "trending", "isLoading"], true),
  hasMore: !!state.getIn(["status_lists", "trending", "next"]),
});

class Statuses extends PureComponent {

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

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

  handleLoadMore = debounce(() => {
    const { dispatch } = this.props;
    dispatch(expandTrendingStatuses());
  }, 300, { leading: true });

  render () {
    const { isLoading, hasMore, statusIds, multiColumn } = this.props;

    const emptyMessage = <FormattedMessage id='empty_column.explore_statuses' defaultMessage='Nothing is trending right now. Check back later!' />;

    return (
      <>
        <DismissableBanner id='explore/statuses'>
          <FormattedMessage id='dismissable_banner.explore_statuses' defaultMessage='These are posts from across the social web that are gaining traction today. Newer posts with more boosts and favorites are ranked higher.' />
        </DismissableBanner>

        <StatusList
          trackScroll
          timelineId='explore'
          statusIds={statusIds}
          scrollKey='explore-statuses'
          hasMore={hasMore}
          isLoading={isLoading}
          onLoadMore={this.handleLoadMore}
          emptyMessage={emptyMessage}
          bindToDocument={!multiColumn}
          withCounters
        />
      </>
    );
  }

}

export default connect(mapStateToProps)(Statuses);