import React, { useEffect } from 'react';
import { FormattedMessage } from 'react-intl';
import { Link } from 'react-router-dom';

import { groupCompose } from 'soapbox/actions/compose';
import { connectGroupStream } from 'soapbox/actions/streaming';
import { expandGroupTimeline } from 'soapbox/actions/timelines';
import { Avatar, HStack, Icon, Stack, Text } from 'soapbox/components/ui';
import ComposeForm from 'soapbox/features/compose/components/compose-form';
import { useAppDispatch, useGroup, useOwnAccount } from 'soapbox/hooks';

import Timeline from '../ui/components/timeline';

type RouteParams = { id: string };

interface IGroupTimeline {
  params: RouteParams
}

const GroupTimeline: React.FC<IGroupTimeline> = (props) => {
  const account = useOwnAccount();
  const dispatch = useAppDispatch();

  const groupId = props.params.id;

  const { group } = useGroup(groupId);

  const canComposeGroupStatus = !!account && group?.relationship?.member;

  const handleLoadMore = (maxId: string) => {
    dispatch(expandGroupTimeline(groupId, { maxId }));
  };

  useEffect(() => {
    dispatch(expandGroupTimeline(groupId));

    dispatch(groupCompose(`group:${groupId}`, groupId));

    const disconnect = dispatch(connectGroupStream(groupId));

    return () => {
      disconnect();
    };
  }, [groupId]);

  if (!group) {
    return null;
  }

  return (
    <Stack space={2}>
      {canComposeGroupStatus && (
        <div className='border-b border-solid border-gray-200 px-2 py-4 dark:border-gray-800'>
          <HStack alignItems='start' space={4}>
            <Link to={`/@${account.acct}`}>
              <Avatar src={account.avatar} size={46} />
            </Link>

            <ComposeForm
              id={`group:${groupId}`}
              shouldCondense
              autoFocus={false}
              group={groupId}
            />
          </HStack>
        </div>
      )}

      <Timeline
        scrollKey='group_timeline'
        timelineId={`group:${groupId}`}
        onLoadMore={handleLoadMore}
        emptyMessage={
          <Stack space={4} className='py-6' justifyContent='center' alignItems='center'>
            <div className='rounded-full bg-gray-200 p-4'>
              <Icon
                src={require('@tabler/icons/message-2.svg')}
                className='h-6 w-6 text-gray-600'
              />
            </div>

            <Text theme='muted'>
              <FormattedMessage id='empty_column.group' defaultMessage='There are no posts in this group yet.' />
            </Text>
          </Stack>
        }
        emptyMessageCard={false}
        divideType='border'
        showGroup={false}
      />
    </Stack>
  );
};

export default GroupTimeline;