import {Link} from 'react-router-dom';
import {useTranslation} from 'react-i18next';
import {Dices, Inbox, Shuffle} from 'lucide-react';

import {Button} from '@/components/ui/button';
import {Card} from '@/components/ui/card';
import {cn} from '@/lib/utils';
import GameCover from './GameCover.jsx';
import PileTrend from './stats/PileTrend.jsx';
import {StatCount} from './stats/StatDrill.jsx';
import {backlogShare, pileGames} from '../utils/backlog.js';
import {sliceColors, statusSlices} from '../utils/statCharts.js';
import {formatPlaytime} from '../utils/games.js';
import {libraryLink} from '../utils/statGames.js';

/**
 * @param trend the TREND group of GET /api/library/stats; the card shows no trend while it is missing
 */
export default function PileOfShameCard({summary, trend, syncing, onShuffle, shuffling}) {
    const {t, i18n} = useTranslation();
    const backlog = pileGames(summary);
    const suggestion = summary.suggestion;
    const slices = statusSlices(summary.byStatus);
    const colors = sliceColors(slices);

    if (syncing && summary.total === 0) {
        return (
            <Card className="gap-5 p-5">
                <Title/>
                <p className="py-6 text-center text-sm text-muted-foreground">{t('LIBRARY.SYNCING_FIRST_TIME')}</p>
            </Card>
        );
    }

    return (
        <Card className="gap-5 p-5">
            <Title/>

            <div>
                <div className="flex items-baseline gap-2">
                    <StatCount to={libraryLink('BACKLOG')} title={t('DASHBOARD.PILE_OF_SHAME')} params={{key: 'PILE'}} count={backlog}
                               label={`${t('BACKLOG.STATUS.BACKLOG')}: ${backlog}`}>
                        <span className="text-4xl font-bold tabular-nums">{backlog.toLocaleString(i18n.language)}</span>
                    </StatCount>
                    <span className="text-sm text-muted-foreground">
                        {t('DASHBOARD.PILE_SHARE', {percent: backlogShare(summary)})}
                    </span>
                </div>
                <p className="mt-1 text-sm text-muted-foreground">
                    <StatCount params={summary.neverPlayed > 0 ? {key: 'NEVER_STARTED'} : null}
                               title={t('STATS.OVERVIEW.NEVER_STARTED')}>
                        {t('DASHBOARD.NEVER_PLAYED', {count: summary.neverPlayed})}
                    </StatCount>
                </p>
                {summary.backlogMinutes > 0 && (
                    <p className="text-sm text-muted-foreground">
                        <StatCount params={{key: 'PILE_TIME_TO_BEAT'}} title={t('STATS.PILE.NORMAL')}>
                            {t('DASHBOARD.BACKLOG_HOURS', {time: formatPlaytime(summary.backlogMinutes)})}
                        </StatCount>
                    </p>
                )}
            </div>

            {trend && <PileTrend trend={trend}/>}

            {summary.total > 0 && (
                <div className="space-y-2">
                    <div className="flex h-2.5 overflow-hidden rounded-full bg-muted">
                        {slices.map((s, i) => s.value > 0 && (
                            <div key={s.name} className="border-card [&:not(:last-child)]:border-r-2"
                                 style={{width: `${(s.value / summary.total) * 100}%`, background: colors[i]}}/>
                        ))}
                    </div>
                    <ul className="flex flex-wrap gap-x-4 gap-y-1 text-xs text-muted-foreground">
                        {slices.map(({name: s, value}, i) => (
                            <li key={s} className="flex items-center gap-1.5">
                                <span className={cn('size-2 rounded-full', !colors[i] && 'bg-muted')}
                                      style={colors[i] ? {background: colors[i]} : undefined}/>
                                {t(`BACKLOG.STATUS.${s}`)}
                                <StatCount to={libraryLink(s)} count={value}
                                           label={`${t(`BACKLOG.STATUS.${s}`)}: ${value}`}>
                                    <span className="tabular-nums text-foreground">{value}</span>
                                </StatCount>
                            </li>
                        ))}
                    </ul>
                </div>
            )}

            {suggestion ? (
                <div className="space-y-2">
                    <div className="flex items-center justify-between">
                        <span className="text-sm font-medium">{t('DASHBOARD.SUGGESTION')}</span>
                        {backlog > 1 && (
                            <Button variant="ghost" size="sm" onClick={onShuffle} disabled={shuffling}>
                                <Shuffle/>{t('DASHBOARD.OTHER_SUGGESTION')}
                            </Button>
                        )}
                    </div>
                    <Link
                        to={`/library/${suggestion.appid}`}
                        className="group flex items-center gap-3 rounded-lg border p-2 transition-colors hover:bg-muted/50"
                    >
                        <GameCover appid={suggestion.appid} imageUrl={suggestion.imageUrl} className="w-24 shrink-0"/>
                        <span className="min-w-0 truncate font-medium group-hover:text-primary transition-colors">
                            {suggestion.name ?? `App ${suggestion.appid}`}
                        </span>
                    </Link>
                    <Button asChild variant="outline" size="sm" className="w-full">
                        <Link to="/play-next"><Dices/>{t('DASHBOARD.OPEN_PICKER')}</Link>
                    </Button>
                </div>
            ) : (
                <p className="text-sm text-muted-foreground">{t('DASHBOARD.BACKLOG_EMPTY')}</p>
            )}
        </Card>
    );
}

function Title() {
    const {t} = useTranslation();
    return (
        <h2 className="flex items-center gap-2 font-semibold">
            <Inbox className="size-4 text-rose-500"/>
            {t('DASHBOARD.PILE_OF_SHAME')}
        </h2>
    );
}