import React from 'react';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
import Column from '../../components/column';
import ColumnHeader from '../../components/column_header';
import { mountConversations, unmountConversations, expandConversations } from '../../actions/conversations';
import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
import { connectDirectStream } from '../../actions/streaming';
import ConversationsListContainer from './containers/conversations_list_container';

const messages = defineMessages({
  title: { id: 'column.direct', defaultMessage: 'Direct messages' },
});

export default @connect()
@injectIntl
class DirectTimeline extends React.PureComponent {

  static propTypes = {
    dispatch: PropTypes.func.isRequired,
    columnId: PropTypes.string,
    intl: PropTypes.object.isRequired,
    hasUnread: PropTypes.bool,
  };

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

    dispatch(mountConversations());
    dispatch(expandConversations());
    this.disconnect = dispatch(connectDirectStream());
  }

  componentWillUnmount () {
    this.props.dispatch(unmountConversations());

    if (this.disconnect) {
      this.disconnect();
      this.disconnect = null;
    }
  }

  handleLoadMore = maxId => {
    this.props.dispatch(expandConversations({ maxId }));
  }

  render () {
    const { intl, hasUnread, columnId } = this.props;

    return (
      <Column label={intl.formatMessage(messages.title)}>
        <ColumnHeader icon='envelope' active={hasUnread} title={intl.formatMessage(messages.title)} />

        <ConversationsListContainer
          scrollKey={`direct_timeline-${columnId}`}
          timelineId='direct'
          onLoadMore={this.handleLoadMore}
          emptyMessage={<FormattedMessage id='empty_column.direct' defaultMessage="You don't have any direct messages yet. When you send or receive one, it will show up here." />}
        />
      </Column>
    );
  }

}