import {ResponseError} from '../../../../../components/Errors/ResponseError';
import type {InfoViewerItem} from '../../../../../components/InfoViewer';
import {InfoViewer} from '../../../../../components/InfoViewer';
import {LabelWithPopover} from '../../../../../components/LabelWithPopover';
import {LagPopoverContent} from '../../../../../components/LagPopoverContent';
import {Loader} from '../../../../../components/Loader';
import {useClusterWithProxy} from '../../../../../store/reducers/cluster/cluster';
import {selectPreparedTopicStats, topicApi} from '../../../../../store/reducers/topic/topic';
import type {IPreparedTopicStats} from '../../../../../types/store/topic';
import {cn} from '../../../../../utils/cn';
import {formatBps, formatBytes} from '../../../../../utils/dataFormatters/dataFormatters';
import {useAutoRefreshInterval, useTypedSelector} from '../../../../../utils/hooks';
import {formatDurationToShortTimeFormat} from '../../../../../utils/timeParsers';

import i18n from './i18n';

import './TopicStats.scss';

const b = cn('ydb-overview-topic-stats');

const prepareTopicInfo = (data: IPreparedTopicStats): Array<InfoViewerItem> => {
    return [
        {label: 'Store size', value: formatBytes(data.storeSize)},
        {
            label: (
                <LabelWithPopover
                    text={'Write idle time'}
                    popoverContent={
                        <LagPopoverContent text={i18n('writeIdleTimePopover')} type="write" />
                    }
                />
            ),
            value: formatDurationToShortTimeFormat(data.partitionsIdleTime),
        },
        {
            label: (
                <LabelWithPopover
                    text={'Write lag'}
                    popoverContent={
                        <LagPopoverContent text={i18n('writeLagPopover')} type="write" />
                    }
                />
            ),
            value: formatDurationToShortTimeFormat(data.partitionsWriteLag),
        },
    ];
};

const prepareBytesWrittenInfo = (data: IPreparedTopicStats): Array<InfoViewerItem> => {
    const writeSpeed = data.writeSpeed;

    return [
        {
            label: 'per minute',
            value: formatBps(writeSpeed.perMinute),
        },
        {
            label: 'per hour',
            value: formatBps(writeSpeed.perHour),
        },
        {
            label: 'per day',
            value: formatBps(writeSpeed.perDay),
        },
    ];
};

interface TopicStatsProps {
    path: string;
    database: string;
    databaseFullPath: string;
}

export const TopicStats = ({path, database, databaseFullPath}: TopicStatsProps) => {
    const useMetaProxy = useClusterWithProxy();
    const [autoRefreshInterval] = useAutoRefreshInterval();
    const {currentData, isFetching, error} = topicApi.useGetTopicQuery(
        {path, database, databaseFullPath, useMetaProxy},
        {pollingInterval: autoRefreshInterval},
    );
    const loading = isFetching && currentData === undefined;
    const data = useTypedSelector((state) =>
        selectPreparedTopicStats(state, path, database, databaseFullPath, useMetaProxy),
    );

    if (loading) {
        return (
            <div className={b()}>
                <Loader size="s" />
            </div>
        );
    }

    // If there is at least some empty data object
    // we initialize its fields with zero values
    // so no data at all is considered to be error as well
    const errorContent = error || !data ? <ResponseError error={error} /> : null;

    return (
        <div className={b()}>
            {errorContent}
            {data ? (
                <div className={b('content')}>
                    <div className={b('info')}>
                        <div className={b('title')}>{i18n('title_stats')}</div>
                        <InfoViewer info={prepareTopicInfo(data)} multilineLabels />
                    </div>
                    <div className={b('bytes-written')}>
                        <div className={b('title')}>{i18n('title_average-write-speed')}</div>
                        <InfoViewer info={prepareBytesWrittenInfo(data)} />
                    </div>
                </div>
            ) : null}
        </div>
    );
};