KI-Zusammenfassung

'use client';

import { Fragment, useEffect, useId, useRef, useState } from 'react';
import { cn, formatPercent, useLocale, useTexts } from '@/lib/kit';
import { Icon, type IconName } from '@/components/ui/icon';
import { Reveal } from '@/components/ui/reveal';
import { Stagger } from '@/components/ui/motion';

export type AiSummaryCardVariant = 'compact' | 'meeting' | 'document' | 'compare';

export type SummaryConfidence = 'high' | 'medium' | 'low';

export interface SummarySource {
  id: number;
  title: string;
  kind?: 'doc' | 'mail' | 'chat' | 'web' | 'meeting';
  /** Where in the source, e.g. "p. 4", "12:40" or "Message 7" */
  locator?: string;
  /** The passage the point relies on. ==Marked words== are highlighted. */
  quote?: string;
  /** e.g. the author or speaker */
  author?: string;
}

export interface SummaryPoint {
  id: string;
  text: string;
  confidence?: SummaryConfidence;
  /** Source ids */
  sources?: number[];
  /** Why the point is uncertain */
  note?: string;
}

export interface MeetingAction {
  id: string;
  text: string;
  owner: string;
  due?: string;
  done?: boolean;
}

export interface CompareDoc {
  id: string;
  title: string;
  /** e.g. the date or version */
  meta?: string;
}

export interface CompareRow {
  id: string;
  topic: string;
  /** Value per document id */
  values: Record<string, string>;
  status: 'same' | 'differs' | 'conflict' | 'missing';
  note?: string;
}

export interface AiSummaryCardProps {
  variant?: AiSummaryCardVariant;
  title?: string;
  /** What was summarized, e.g. "Thread · 23 messages" */
  context?: string;
  /** The summary in one or two sentences */
  tldr?: string;
  points?: SummaryPoint[];
  /** compact: more paragraphs behind "Show more" */
  details?: string[];
  sources?: SummarySource[];
  /** Overall confidence in percent */
  confidence?: number;
  /** Things the summary could not settle */
  unclear?: string[];
  /** meeting */
  meeting?: { date: string; duration: string; participants: string[] };
  decisions?: { text: string; source?: number }[];
  actions?: MeetingAction[];
  /** document, compare: facts the sources do not contain */
  missing?: string[];
  /** compare */
  docs?: CompareDoc[];
  rows?: CompareRow[];
  /** e.g. "Nova 2 · 2 min ago" */
  generated?: string;
  onFeedback?: (helpful: boolean, reason?: string) => void;
  onCopy?: (text: string) => void;
  labels?: Partial<(typeof TEXTS)['en']>;
  className?: string;
}

const TEXTS = {
  en: {
    summary: 'AI summary',
    keyPoints: 'Key points',
    more: 'Show more',
    less: 'Show less',
    high: 'High confidence',
    medium: 'Medium confidence',
    low: 'Low confidence',
    confidence: 'Confidence',
    confidenceOf: 'Confidence {v}',
    unclear: 'Not settled',
    sources: 'Sources',
    source: 'Source {n}',
    openSource: 'Show passage from source {n}',
    copy: 'Copy summary',
    copied: 'Copied',
    copyShort: 'Copy',
    helpful: 'Helpful',
    notHelpful: 'Not helpful',
    why: 'What was off?',
    reasons: 'Inaccurate|Something is missing|Too long|Wrong tone',
    thanks: 'Thanks, this helps the next summary.',
    decisions: 'Decisions',
    actions: 'Action items',
    owner: 'Owner',
    due: 'Due {v}',
    openItems: '{n} of {total} open',
    participants: 'Participants',
    jump: 'Hear it at {v}',
    passage: 'Passage',
    passageOf: 'Passage for “{name}”',
    pick: 'Choose a point to see where it comes from.',
    inSource: 'In the source',
    noSource: 'No source backs this point.',
    missing: 'Not in the documents',
    compare: 'Comparison',
    topic: 'Topic',
    onlyDiff: 'Only differences',
    same: 'Same',
    differs: 'Differs',
    conflict: 'Contradicts',
    missingStatus: 'Missing',
    tally: '{same} same, {differs} different, {conflict} contradicting',
    empty: 'All documents agree.',
    honest: 'Written by AI from the sources listed. It can leave things out or get them wrong, check the passages before you rely on it.',
  },
  de: {
    summary: 'KI-Zusammenfassung',
    keyPoints: 'Kernpunkte',
    more: 'Mehr anzeigen',
    less: 'Weniger anzeigen',
    high: 'Hohe Sicherheit',
    medium: 'Mittlere Sicherheit',
    low: 'Geringe Sicherheit',
    confidence: 'Sicherheit',
    confidenceOf: 'Sicherheit {v}',
    unclear: 'Nicht geklärt',
    sources: 'Quellen',
    source: 'Quelle {n}',
    openSource: 'Stelle aus Quelle {n} zeigen',
    copy: 'Zusammenfassung kopieren',
    copied: 'Kopiert',
    copyShort: 'Kopieren',
    helpful: 'Hilfreich',
    notHelpful: 'Nicht hilfreich',
    why: 'Was hat nicht gepasst?',
    reasons: 'Ungenau|Es fehlt etwas|Zu lang|Falscher Ton',
    thanks: 'Danke, das hilft der nächsten Zusammenfassung.',
    decisions: 'Entscheidungen',
    actions: 'Aufgaben',
    owner: 'Zuständig',
    due: 'bis {v}',
    openItems: '{n} von {total} offen',
    participants: 'Teilnehmende',
    jump: 'Bei {v} anhören',
    passage: 'Fundstelle',
    passageOf: 'Fundstelle zu „{name}“',
    pick: 'Wähle einen Punkt, um zu sehen, woher er kommt.',
    inSource: 'In der Quelle',
    noSource: 'Keine Quelle stützt diesen Punkt.',
    missing: 'Nicht in den Dokumenten',
    compare: 'Vergleich',
    topic: 'Thema',
    onlyDiff: 'Nur Unterschiede',
    same: 'Gleich',
    differs: 'Abweichend',
    conflict: 'Widerspruch',
    missingStatus: 'Fehlt',
    tally: '{same} gleich, {differs} abweichend, {conflict} im Widerspruch',
    empty: 'Alle Dokumente stimmen überein.',
    honest: 'Von KI aus den genannten Quellen geschrieben. Sie kann etwas auslassen oder falsch verstehen, prüfe die Fundstellen, bevor du dich darauf verlässt.',
  },
};

type Texts = (typeof TEXTS)['en'];
type P = AiSummaryCardProps & { t: Texts };
const fill = (s: string, v: Record<string, string | number>) => s.replace(/\{(\w+)\}/g, (_, k) => String(v[k] ?? ''));

/** State seeded from a prop that starts over when the prop changes (the Studio edits props live) */
function useSynced<T>(value: T) {
  const [state, setState] = useState(value);
  const key = JSON.stringify(value);
  const seen = useRef(key);
  if (seen.current !== key) {
    seen.current = key;
    setState(value);
  }
  return [state, setState] as const;
}

const CSS =
  '@keyframes asc-up{from{opacity:0;transform:translateY(6px)}}@keyframes asc-flash{from{background-color:color-mix(in oklab,var(--primary) 22%,transparent)}}' +
  '@media (prefers-reduced-motion:no-preference){.asc-up{animation:asc-up .4s var(--ease-kit) var(--asc-d,0ms) both}.asc-flash{animation:asc-flash 1.2s ease-out both}}' +
  '.asc-details>summary{list-style:none}.asc-details>summary::-webkit-details-marker{display:none}';

function Style() {
  return (
    <style href="kit-ai-summary-card" precedence="default">
      {CSS}
    </style>
  );
}

/* ------------------------------------------------------------------ */
/* Shared parts                                                        */
/* ------------------------------------------------------------------ */

const card = 'rounded-2xl border border-border bg-card shadow-[var(--highlight),var(--shadow-sm)]';
const iconBtn = 'inline-flex h-11 min-w-11 shrink-0 items-center justify-center gap-1.5 whitespace-nowrap rounded-lg px-2.5 text-[13px] font-medium text-muted-foreground transition-colors hover:bg-accent hover:text-foreground sm:h-9 sm:min-w-9';
const KIND_ICON: Record<NonNullable<SummarySource['kind']>, IconName> = { doc: 'file', mail: 'mail', chat: 'chat', web: 'globe', meeting: 'video' };

const level = (n: number): SummaryConfidence => (n >= 80 ? 'high' : n >= 55 ? 'medium' : 'low');
const LEVEL_TONE: Record<SummaryConfidence, { text: string; bar: string; bg: string }> = {
  high: { text: 'text-success-foreground', bar: 'bg-success', bg: 'bg-[color-mix(in_oklab,var(--success)_13%,transparent)]' },
  medium: { text: 'text-warning-foreground', bar: 'bg-warning', bg: 'bg-[color-mix(in_oklab,var(--warning)_15%,transparent)]' },
  low: { text: 'text-destructive', bar: 'bg-destructive', bg: 'bg-[color-mix(in_oklab,var(--destructive)_12%,transparent)]' },
};

/** Five bars and a word, with the exact value for screen readers */
function ConfidenceMeter({ value, t, className }: { value: number; t: Texts; className?: string }) {
  const locale = useLocale();
  const lv = level(value);
  const on = Math.max(1, Math.round(value / 20));
  return (
    <span role="meter" aria-label={t.confidence} aria-valuemin={0} aria-valuemax={100} aria-valuenow={value} aria-valuetext={`${t[lv]}, ${formatPercent(value, locale)}`} className={cn('inline-flex items-center gap-2', className)}>
      <span aria-hidden className="flex items-end gap-[3px]">
        {[0, 1, 2, 3, 4].map((i) => (
          <span key={i} className={cn('w-[5px] rounded-[2px]', i < on ? LEVEL_TONE[lv].bar : 'bg-track')} style={{ height: 6 + i * 2.5 }} />
        ))}
      </span>
      <span aria-hidden className={cn('text-[12px] font-medium', LEVEL_TONE[lv].text)}>
        {t[lv]} <span className="tabular-nums text-muted-foreground">· {formatPercent(value, locale)}</span>
      </span>
    </span>
  );
}

function LevelTag({ level: lv, t }: { level: SummaryConfidence; t: Texts }) {
  return <span className={cn('inline-flex h-5 shrink-0 items-center whitespace-nowrap rounded-[5px] px-1.5 text-[11px] font-medium', LEVEL_TONE[lv].bg, LEVEL_TONE[lv].text)}>{t[lv]}</span>;
}

/** Text with ==marked== words */
function Marked({ text }: { text: string }) {
  return (
    <>
      {text.split(/(==[^=]+==)/g).map((part, i) =>
        part.startsWith('==') ? (
          <mark key={i} className="rounded-[3px] bg-[color-mix(in_oklab,var(--warning)_30%,transparent)] px-0.5 text-foreground">
            {part.slice(2, -2)}
          </mark>
        ) : (
          <Fragment key={i}>{part}</Fragment>
        ),
      )}
    </>
  );
}

/** A small numbered marker that opens the source passage */
function SourceChip({ source, t, active, onClick }: { source: SummarySource; t: Texts; active?: boolean; onClick?: () => void }) {
  const cls = cn('relative inline-flex h-[1.4em] min-w-[1.4em] items-center justify-center rounded-[5px] px-1 align-[0.1em] text-[11px] font-semibold tabular-nums leading-none transition-colors after:absolute after:-inset-1', active ? 'bg-primary text-primary-foreground' : 'bg-[color-mix(in_oklab,var(--foreground)_8%,transparent)] text-muted-foreground hover:bg-[color-mix(in_oklab,var(--primary)_18%,transparent)] hover:text-foreground');
  if (!onClick) return <span className={cls}>{source.id}</span>;
  return (
    <button type="button" aria-label={fill(t.openSource, { n: source.id })} aria-pressed={active} onClick={onClick} className={cls}>
      {source.id}
    </button>
  );
}

function Header({ t, title, context, confidence, generated, className }: { t: Texts; title?: string; context?: string; confidence?: number; generated?: string; className?: string }) {
  return (
    <div className={cn('flex flex-wrap items-start justify-between gap-x-4 gap-y-2', className)}>
      <div className="min-w-0">
        <p className="flex items-center gap-1.5 text-[12.5px] font-medium text-[color-mix(in_oklab,var(--primary)_75%,var(--muted-foreground))]">
          <Icon name="sparkle" size={14} />
          {t.summary}
          {context && <span className="font-normal text-muted-foreground">· {context}</span>}
        </p>
        {title && <h3 className="mt-1.5 text-balance text-[18px] font-semibold leading-snug tracking-[-0.015em] text-foreground sm:text-[20px]">{title}</h3>}
        {generated && <p className="mt-1 text-[12px] text-subtle-foreground">{generated}</p>}
      </div>
      {confidence !== undefined && <ConfidenceMeter value={confidence} t={t} className="pt-0.5" />}
    </div>
  );
}

/** Copy, helpful and not helpful with a reason */
function Feedback({ t, text, onFeedback, onCopy, className }: { t: Texts; text: string; onFeedback?: AiSummaryCardProps['onFeedback']; onCopy?: AiSummaryCardProps['onCopy']; className?: string }) {
  const [vote, setVote] = useState<boolean | null>(null);
  const [reason, setReason] = useState<string | null>(null);
  const [copied, setCopied] = useState(false);
  useEffect(() => {
    if (!copied) return;
    const id = window.setTimeout(() => setCopied(false), 1800);
    return () => window.clearTimeout(id);
  }, [copied]);
  const reasons = t.reasons.split('|');
  return (
    <div className={className}>
      <div className="flex flex-wrap items-center gap-1">
        <button
          type="button"
          onClick={() => {
            navigator.clipboard?.writeText(text).catch(() => undefined);
            onCopy?.(text);
            setCopied(true);
          }}
          className={iconBtn}
          aria-live="polite"
        >
          <Icon name={copied ? 'check' : 'copy'} size={15} className={copied ? 'text-success-foreground' : undefined} />
          <span className={copied ? 'text-success-foreground' : undefined}>
            {copied ? t.copied : (
              <>
                <span className="sm:hidden">{t.copyShort}</span>
                <span className="max-sm:hidden">{t.copy}</span>
              </>
            )}
          </span>
        </button>
        <span className="flex-1" />
        {[true, false].map((v) => (
          <button key={String(v)} type="button" aria-pressed={vote === v} aria-label={v ? t.helpful : t.notHelpful} title={v ? t.helpful : t.notHelpful} onClick={() => (setVote(v), setReason(null), v && onFeedback?.(true))} className={cn(iconBtn, 'px-0', vote === v && 'bg-[color-mix(in_oklab,var(--primary)_14%,transparent)] text-[color-mix(in_oklab,var(--primary)_80%,var(--foreground))]')}>
            <Icon name={v ? 'thumbs-up' : 'thumbs-down'} size={15} />
          </button>
        ))}
      </div>
      {vote === false && !reason && (
        <div className="asc-up mt-2 rounded-xl border border-border bg-surface p-3">
          <p className="text-[12.5px] font-medium text-foreground">{t.why}</p>
          <div className="mt-2 flex flex-wrap gap-1.5">
            {reasons.map((r) => (
              <button key={r} type="button" onClick={() => (setReason(r), onFeedback?.(false, r))} className="inline-flex min-h-11 items-center rounded-lg border border-border bg-card px-3 text-[12.5px] font-medium text-foreground transition-colors hover:bg-accent sm:min-h-8">
                {r}
              </button>
            ))}
          </div>
        </div>
      )}
      <p className="text-[12.5px] text-muted-foreground empty:hidden" role="status">
        {(vote === true || reason) && <span className="asc-up mt-2 inline-flex items-center gap-1.5"><Icon name="check-circle" size={14} className="text-success-foreground" />{t.thanks}</span>}
      </p>
    </div>
  );
}

function Honest({ t }: { t: Texts }) {
  return (
    <p className="flex items-start gap-2 text-[12px] leading-snug text-muted-foreground">
      <Icon name="info" size={14} className="mt-px shrink-0" />
      <span>{t.honest}</span>
    </p>
  );
}

function Stage({ children, className, wide }: { children: React.ReactNode; className?: string; wide?: boolean }) {
  return (
    <section className={cn('kit-glow relative overflow-clip bg-surface py-12 sm:py-16 lg:py-20', className)}>
      <Style />
      <div className="kit-container">
        <div className={cn('mx-auto w-full', wide ? 'max-w-[68rem]' : 'max-w-[42rem]')}>{children}</div>
      </div>
    </section>
  );
}

function SectionLabel({ icon, children, aside }: { icon: IconName; children: React.ReactNode; aside?: React.ReactNode }) {
  return (
    <p className="flex items-center gap-1.5 text-[12.5px] font-medium text-muted-foreground">
      <Icon name={icon} size={14} />
      {children}
      {aside && <span className="ml-auto font-normal">{aside}</span>}
    </p>
  );
}

function summaryText(p: AiSummaryCardProps) {
  return [p.title, p.tldr, ...(p.points ?? []).map((x) => `• ${x.text}`), ...(p.decisions ?? []).map((x) => `• ${x.text}`), ...(p.actions ?? []).map((a) => `☐ ${a.text} (${a.owner}${a.due ? `, ${a.due}` : ''})`)].filter(Boolean).join('\n');
}

/* ------------------------------------------------------------------ */
/* compact                                                             */
/* ------------------------------------------------------------------ */

function Compact(p: P) {
  const { t, title, context, tldr, points = [], details = [], sources = [], confidence, unclear = [], generated, onFeedback, onCopy, className } = p;
  const [open, setOpen] = useState<number | null>(null);
  const src = sources.find((s) => s.id === open);
  return (
    <Stage className={className}>
      <Reveal effect="scale" className={cn(card, 'relative overflow-hidden p-5 sm:p-6')}>
        <span aria-hidden className="pointer-events-none absolute inset-x-0 top-0 h-px bg-[linear-gradient(90deg,transparent,color-mix(in_oklab,var(--primary)_70%,transparent),transparent)]" />
        <Header t={t} title={title} context={context} confidence={confidence} generated={generated} />
        {tldr && <p className="mt-4 text-pretty text-[15.5px] leading-relaxed text-foreground">{tldr}</p>}
        {points.length > 0 && (
          <Stagger as="ul" step={60} className="mt-4 space-y-2.5">
            {points.map((x) => (
              <li key={x.id} className="flex gap-2.5 text-[14px] leading-relaxed text-foreground">
                <span aria-hidden className="mt-[9px] size-1.5 shrink-0 rounded-full bg-primary" />
                <span className="min-w-0">
                  {x.text}
                  {x.sources?.map((id) => {
                    const s = sources.find((y) => y.id === id);
                    return s ? (
                      <Fragment key={id}>
                        {' '}
                        <SourceChip source={s} t={t} active={open === id} onClick={() => setOpen(open === id ? null : id)} />
                      </Fragment>
                    ) : null;
                  })}
                  {x.confidence && x.confidence !== 'high' && (
                    <span className="ml-1.5 inline-block align-[0.05em]">
                      <LevelTag level={x.confidence} t={t} />
                    </span>
                  )}
                </span>
              </li>
            ))}
          </Stagger>
        )}
        {src && (
          <figure key={src.id} className="asc-up mt-4 rounded-xl border border-border bg-surface p-3.5" aria-live="polite">
            <figcaption className="flex items-center gap-1.5 text-[12px] text-muted-foreground">
              <Icon name={KIND_ICON[src.kind ?? 'doc']} size={13} />
              <span className="font-medium text-foreground">{src.title}</span>
              {src.locator && <span>· {src.locator}</span>}
            </figcaption>
            {src.quote && (
              <blockquote className="mt-1.5 text-[13.5px] leading-relaxed text-foreground">
                <Marked text={src.quote} />
              </blockquote>
            )}
          </figure>
        )}
        {(details.length > 0 || unclear.length > 0) && (
          <details className="asc-details group mt-4">
            <summary className="inline-flex h-11 cursor-pointer items-center gap-1.5 rounded-lg px-2.5 text-[13px] font-medium text-foreground transition-colors hover:bg-accent sm:h-9 -ml-2.5">
              <Icon name="chevron-down" size={15} className="transition-transform duration-300 group-open:rotate-180 motion-reduce:transition-none" />
              <span className="group-open:hidden">{t.more}</span>
              <span className="hidden group-open:inline">{t.less}</span>
            </summary>
            <div className="asc-up mt-2 space-y-3">
              {details.map((x, i) => (
                <p key={i} className="text-pretty text-[14px] leading-relaxed text-muted-foreground">
                  {x}
                </p>
              ))}
              {unclear.length > 0 && (
                <div className="rounded-xl bg-[color-mix(in_oklab,var(--warning)_10%,var(--card))] p-3.5">
                  <p className="flex items-center gap-1.5 text-[12.5px] font-medium text-warning-foreground">
                    <Icon name="help-circle" size={14} />
                    {t.unclear}
                  </p>
                  <ul className="mt-1.5 space-y-1">
                    {unclear.map((u) => (
                      <li key={u} className="text-[13.5px] leading-relaxed text-foreground">
                        {u}
                      </li>
                    ))}
                  </ul>
                </div>
              )}
            </div>
          </details>
        )}
        {sources.length > 0 && (
          <div className="mt-4 border-t border-border pt-4">
            <SectionLabel icon="book-open">{t.sources}</SectionLabel>
            <ul className="mt-2 flex flex-wrap gap-1.5">
              {sources.map((s) => (
                <li key={s.id}>
                  <button type="button" aria-pressed={open === s.id} onClick={() => setOpen(open === s.id ? null : s.id)} className={cn('inline-flex min-h-11 max-w-full items-center gap-1.5 rounded-lg border px-2.5 text-[12.5px] transition-colors sm:min-h-8', open === s.id ? 'border-primary bg-[color-mix(in_oklab,var(--primary)_10%,var(--card))] text-foreground' : 'border-border text-muted-foreground hover:bg-accent hover:text-foreground')}>
                    <span className="tabular-nums text-subtle-foreground">{s.id}</span>
                    <Icon name={KIND_ICON[s.kind ?? 'doc']} size={13} />
                    <span className="truncate">{s.title}</span>
                  </button>
                </li>
              ))}
            </ul>
          </div>
        )}
        <Feedback t={t} text={summaryText(p)} onFeedback={onFeedback} onCopy={onCopy} className="mt-4 border-t border-border pt-3" />
      </Reveal>
      <Reveal delay={120} className="mt-4 px-1">
        <Honest t={t} />
      </Reveal>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */
/* meeting                                                             */
/* ------------------------------------------------------------------ */

const initials = (n: string) =>
  n
    .split(/\s+/)
    .map((w) => w[0])
    .join('')
    .slice(0, 2)
    .toUpperCase();

function Meeting(p: P) {
  const { t, title, context, tldr, decisions = [], actions: initial = [], sources = [], unclear = [], confidence, meeting, generated, onFeedback, onCopy, className } = p;
  const [actions, setActions] = useSynced(initial);
  const [open, setOpen] = useState<number | null>(null);
  const uid = useId();
  const openCount = actions.filter((a) => !a.done).length;
  const src = sources.find((s) => s.id === open);
  const passage = src && (
    <figure key={src.id} className="asc-up mt-2 rounded-xl border border-border bg-surface p-3" aria-live="polite">
      <figcaption className="flex flex-wrap items-center gap-x-1.5 text-[12px] text-muted-foreground">
        <Icon name="play-circle" size={13} />
        <span className="font-medium text-foreground">{src.author ?? src.title}</span>
        {src.locator && <span className="tabular-nums">· {src.locator}</span>}
      </figcaption>
      {src.quote && (
        <blockquote className="mt-1 text-[13.5px] leading-relaxed text-foreground">
          „<Marked text={src.quote} />“
        </blockquote>
      )}
    </figure>
  );
  return (
    <Stage className={className} wide>
      <div className="grid grid-cols-1 gap-4 lg:grid-cols-[minmax(0,1fr)_19rem] lg:items-start lg:gap-5">
        <Reveal className={cn(card, 'p-5 sm:p-6')}>
          <Header t={t} title={title} context={context} generated={generated} />
          {meeting && (
            <div className="mt-4 flex flex-wrap items-center gap-x-4 gap-y-2 text-[12.5px] text-muted-foreground">
              <span className="inline-flex items-center gap-1.5">
                <Icon name="calendar" size={14} />
                {meeting.date}
              </span>
              <span className="inline-flex items-center gap-1.5">
                <Icon name="clock" size={14} />
                {meeting.duration}
              </span>
              <span className="inline-flex items-center gap-2">
                <span className="sr-only">{t.participants}</span>
                <span aria-hidden className="flex -space-x-1.5">
                  {meeting.participants.slice(0, 5).map((n, i) => (
                    <span key={n} title={n} className="grid size-6 place-items-center rounded-full border-2 border-card text-[9.5px] font-semibold text-foreground" style={{ background: `color-mix(in oklab, var(--primary) ${12 + (i % 4) * 9}%, var(--surface-2))` }}>
                      {initials(n)}
                    </span>
                  ))}
                </span>
                <span>{meeting.participants.join(', ')}</span>
              </span>
            </div>
          )}
          {tldr && <p className="mt-4 text-pretty text-[15.5px] leading-relaxed text-foreground">{tldr}</p>}

          {decisions.length > 0 && (
            <div className="mt-6">
              <SectionLabel icon="flag">{t.decisions}</SectionLabel>
              <ul className="mt-2.5 space-y-2">
                {decisions.map((x, i) => {
                  const s = sources.find((y) => y.id === x.source);
                  return (
                    <li key={i} className="asc-up flex gap-2.5 text-[14px] leading-relaxed text-foreground" style={{ '--asc-d': `${i * 60}ms` } as React.CSSProperties}>
                      <Icon name="check-circle" size={16} className="mt-[3px] shrink-0 text-success-foreground" />
                      <span className="min-w-0 flex-1">
                        {x.text}
                        {s?.locator && (
                          <button type="button" aria-pressed={open === s.id} aria-label={fill(t.jump, { v: s.locator })} onClick={() => setOpen(open === s.id ? null : s.id)} className={cn('relative ml-1.5 inline-flex h-6 items-center gap-1 rounded-md px-1.5 align-[0.05em] text-[11.5px] font-medium tabular-nums transition-colors after:absolute after:-inset-3 sm:after:-inset-1', open === s.id ? 'bg-primary text-primary-foreground' : 'bg-[color-mix(in_oklab,var(--foreground)_7%,transparent)] text-muted-foreground hover:text-foreground')}>
                            <Icon name="play" size={10} />
                            {s.locator}
                          </button>
                        )}
                        {open === s?.id && passage}
                      </span>
                    </li>
                  );
                })}
              </ul>
            </div>
          )}

          {actions.length > 0 && (
            <div className="mt-6">
              <SectionLabel icon="list-checks" aside={fill(t.openItems, { n: openCount, total: actions.length })}>
                {t.actions}
              </SectionLabel>
              <ul className="mt-2.5 divide-y divide-border rounded-xl border border-border">
                {actions.map((a) => (
                  <li key={a.id}>
                    <label className="flex min-h-12 cursor-pointer items-start gap-3 px-3.5 py-3 transition-colors hover:bg-[color-mix(in_oklab,var(--foreground)_3%,transparent)]">
                      <input type="checkbox" checked={!!a.done} onChange={(e) => setActions((s) => s.map((x) => (x.id === a.id ? { ...x, done: e.target.checked } : x)))} className="mt-0.5 size-4 shrink-0 accent-[var(--primary)]" aria-describedby={`${uid}-${a.id}`} />
                      <span className="min-w-0 flex-1">
                        <span className={cn('block text-[14px] leading-snug transition-colors', a.done ? 'text-muted-foreground line-through' : 'text-foreground')}>{a.text}</span>
                        <span id={`${uid}-${a.id}`} className="mt-1 flex flex-wrap items-center gap-x-2 gap-y-1 text-[12px] text-muted-foreground">
                          <span className="inline-flex items-center gap-1.5">
                            <span aria-hidden className="grid size-5 place-items-center rounded-full bg-surface-2 text-[9px] font-semibold text-foreground">{initials(a.owner)}</span>
                            <span className="sr-only">{t.owner} </span>
                            {a.owner}
                          </span>
                          {a.due && <span className="tabular-nums">· {fill(t.due, { v: a.due })}</span>}
                        </span>
                      </span>
                    </label>
                  </li>
                ))}
              </ul>
            </div>
          )}
          <Feedback t={t} text={summaryText({ ...p, actions })} onFeedback={onFeedback} onCopy={onCopy} className="mt-6 border-t border-border pt-3" />
        </Reveal>

        <Reveal delay={120} className="space-y-4 lg:sticky lg:top-6">
          {confidence !== undefined && (
            <div className={cn(card, 'p-4')}>
              <p className="text-[12.5px] font-medium text-muted-foreground">{t.confidence}</p>
              <ConfidenceMeter value={confidence} t={t} className="mt-2" />
              {unclear.length > 0 && (
                <div className="mt-4 border-t border-border pt-3.5">
                  <p className="flex items-center gap-1.5 text-[12.5px] font-medium text-warning-foreground">
                    <Icon name="help-circle" size={14} />
                    {t.unclear}
                  </p>
                  <ul className="mt-2 space-y-2">
                    {unclear.map((u) => (
                      <li key={u} className="text-[13px] leading-snug text-foreground">
                        {u}
                      </li>
                    ))}
                  </ul>
                </div>
              )}
            </div>
          )}
          <Honest t={t} />
        </Reveal>
      </div>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */
/* document                                                            */
/* ------------------------------------------------------------------ */

function DocumentView(p: P) {
  const { t, title, context, tldr, points = [], sources = [], missing = [], confidence, generated, onFeedback, onCopy, className } = p;
  const [sel, setSel] = useState<string | null>(points[0]?.id ?? null);
  const uid = useId();
  const refs = useRef<(HTMLButtonElement | null)[]>([]);
  const point = points.find((x) => x.id === sel);
  const src = point?.sources?.map((id) => sources.find((s) => s.id === id)).filter((s): s is SummarySource => !!s) ?? [];
  const passage = (
    <div key={sel ?? 'none'} className="asc-up">
      {!point ? (
        <p className="text-[13px] text-muted-foreground">{t.pick}</p>
      ) : src.length ? (
        <div className="space-y-3">
          {src.map((s) => (
            <figure key={s.id}>
              <figcaption className="flex flex-wrap items-center gap-x-1.5 text-[12px] text-muted-foreground">
                <Icon name={KIND_ICON[s.kind ?? 'doc']} size={13} />
                <span className="font-medium text-foreground">{s.title}</span>
                {s.locator && <span className="tabular-nums">· {s.locator}</span>}
              </figcaption>
              {s.quote && (
                <blockquote className="asc-flash mt-1.5 rounded-lg border-l-2 border-[color-mix(in_oklab,var(--warning)_70%,var(--border))] py-1 pl-3 text-[13.5px] leading-relaxed text-foreground">
                  <Marked text={s.quote} />
                </blockquote>
              )}
            </figure>
          ))}
          {point.note && (
            <p className="flex items-start gap-1.5 rounded-lg bg-[color-mix(in_oklab,var(--warning)_10%,var(--card))] p-2.5 text-[12.5px] leading-snug text-foreground">
              <Icon name="alert" size={14} className="mt-px shrink-0 text-warning-foreground" />
              {point.note}
            </p>
          )}
        </div>
      ) : (
        <p className="flex items-start gap-1.5 text-[13px] leading-snug text-destructive">
          <Icon name="alert-circle" size={14} className="mt-px shrink-0" />
          {point.note ?? t.noSource}
        </p>
      )}
    </div>
  );
  return (
    <Stage className={className} wide>
      <div className="grid grid-cols-1 gap-4 lg:grid-cols-[minmax(0,1fr)_22rem] lg:items-start lg:gap-5">
        <Reveal className={cn(card, 'p-5 sm:p-6')}>
          <Header t={t} title={title} context={context} confidence={confidence} generated={generated} />
          {tldr && <p className="mt-4 text-pretty text-[15.5px] leading-relaxed text-foreground">{tldr}</p>}
          <div className="mt-6">
            <SectionLabel icon="list">{t.keyPoints}</SectionLabel>
            <ol className="mt-2.5 space-y-1.5">
              {points.map((x, i) => {
                const on = sel === x.id;
                return (
                  <li key={x.id}>
                    <button
                      ref={(el) => {
                        refs.current[i] = el;
                      }}
                      type="button"
                      aria-expanded={on}
                      aria-controls={`${uid}-passage`}
                      onClick={() => setSel(on ? null : x.id)}
                      onKeyDown={(e) => {
                        const d = e.key === 'ArrowDown' ? 1 : e.key === 'ArrowUp' ? -1 : 0;
                        if (!d) return;
                        e.preventDefault();
                        refs.current[(i + d + points.length) % points.length]?.focus();
                      }}
                      className={cn('flex w-full items-start gap-3 rounded-xl border px-3.5 py-3 text-left transition-colors', on ? 'border-[color-mix(in_oklab,var(--primary)_55%,var(--border))] bg-[color-mix(in_oklab,var(--primary)_7%,var(--card))]' : 'border-transparent hover:bg-accent')}
                    >
                      <span aria-hidden className={cn('mt-px grid size-6 shrink-0 place-items-center rounded-full text-[11.5px] font-semibold tabular-nums', on ? 'bg-primary text-primary-foreground' : 'bg-surface-2 text-muted-foreground')}>
                        {i + 1}
                      </span>
                      <span className="min-w-0 flex-1">
                        <span className="block text-[14px] leading-relaxed text-foreground">{x.text}</span>
                        <span className="mt-1.5 flex flex-wrap items-center gap-1.5">
                          {x.confidence && <LevelTag level={x.confidence} t={t} />}
                          {x.sources?.map((id) => {
                            const s = sources.find((y) => y.id === id);
                            return s?.locator ? (
                              <span key={id} className="inline-flex h-5 items-center gap-1 rounded-[5px] bg-[color-mix(in_oklab,var(--foreground)_7%,transparent)] px-1.5 text-[11px] tabular-nums text-muted-foreground">
                                <Icon name={KIND_ICON[s.kind ?? 'doc']} size={11} />
                                {s.locator}
                              </span>
                            ) : null;
                          })}
                        </span>
                      </span>
                      <Icon name="chevron-right" size={16} className={cn('mt-1 shrink-0 text-subtle-foreground transition-transform duration-300 max-lg:rotate-90 motion-reduce:transition-none', on && 'text-foreground max-lg:-rotate-90')} />
                    </button>
                    {/* On phones and tablets the passage opens under its point */}
                    {on && <div className="mx-3.5 mb-2 mt-1 border-l border-border pl-3 lg:hidden">{passage}</div>}
                  </li>
                );
              })}
            </ol>
          </div>
          {missing.length > 0 && (
            <div className="mt-6 rounded-xl border border-dashed border-border-strong p-3.5">
              <SectionLabel icon="search">{t.missing}</SectionLabel>
              <ul className="mt-2 space-y-1">
                {missing.map((m) => (
                  <li key={m} className="text-[13.5px] leading-relaxed text-foreground">
                    {m}
                  </li>
                ))}
              </ul>
            </div>
          )}
          <Feedback t={t} text={summaryText(p)} onFeedback={onFeedback} onCopy={onCopy} className="mt-6 border-t border-border pt-3" />
        </Reveal>
        <Reveal delay={120} className="space-y-4 max-lg:hidden lg:sticky lg:top-6">
          <div id={`${uid}-passage`} role="region" aria-label={point ? fill(t.passageOf, { name: point.text.slice(0, 40) }) : t.passage} className={cn(card, 'p-4')}>
            <p className="mb-3 flex items-center gap-1.5 text-[12.5px] font-medium text-muted-foreground">
              <Icon name="quote" size={14} />
              {t.passage}
            </p>
            {passage}
          </div>
          <Honest t={t} />
        </Reveal>
      </div>
      <div className="mt-4 px-1 lg:hidden">
        <Honest t={t} />
      </div>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */
/* compare                                                             */
/* ------------------------------------------------------------------ */

const STATUS: Record<CompareRow['status'], { key: 'same' | 'differs' | 'conflict' | 'missingStatus'; icon: IconName; cls: string }> = {
  same: { key: 'same', icon: 'check', cls: 'bg-[color-mix(in_oklab,var(--success)_13%,transparent)] text-success-foreground' },
  differs: { key: 'differs', icon: 'arrows-left-right', cls: 'bg-[color-mix(in_oklab,var(--warning)_15%,transparent)] text-warning-foreground' },
  conflict: { key: 'conflict', icon: 'alert-circle', cls: 'bg-[color-mix(in_oklab,var(--destructive)_12%,transparent)] text-destructive' },
  missing: { key: 'missingStatus', icon: 'minus', cls: 'bg-[color-mix(in_oklab,var(--foreground)_7%,transparent)] text-muted-foreground' },
};

function StatusTag({ status, t }: { status: CompareRow['status']; t: Texts }) {
  const s = STATUS[status];
  return (
    <span className={cn('inline-flex h-6 shrink-0 items-center gap-1 whitespace-nowrap rounded-md px-1.5 text-[11.5px] font-medium', s.cls)}>
      <Icon name={s.icon} size={12} />
      {t[s.key]}
    </span>
  );
}

function Compare(p: P) {
  const { t, title, context, tldr, docs = [], rows = [], confidence, missing = [], generated, onFeedback, onCopy, className } = p;
  const [only, setOnly] = useState(false);
  const shown = rows.filter((r) => !only || r.status !== 'same');
  const n = (s: CompareRow['status']) => rows.filter((r) => r.status === s).length;
  const cols = `minmax(9rem,0.8fr) repeat(${docs.length}, minmax(0,1fr)) 7.5rem`;
  return (
    <Stage className={className} wide>
      <Reveal className={cn(card, 'p-5 sm:p-6')}>
        <Header t={t} title={title} context={context} confidence={confidence} generated={generated} />
        {tldr && <p className="mt-4 max-w-[48rem] text-pretty text-[15.5px] leading-relaxed text-foreground">{tldr}</p>}
        <div className="mt-5 flex flex-wrap items-center justify-between gap-3">
          <p className="text-[13px] text-muted-foreground">{fill(t.tally, { same: n('same'), differs: n('differs') + n('missing'), conflict: n('conflict') })}</p>
          <label className="inline-flex min-h-11 cursor-pointer items-center gap-2 rounded-lg px-1 text-[13px] font-medium text-foreground sm:min-h-9">
            <input type="checkbox" checked={only} onChange={(e) => setOnly(e.target.checked)} className="size-4 accent-[var(--primary)]" />
            {t.onlyDiff}
          </label>
        </div>

        {/* A grid table from tablets on */}
        <div role="table" aria-label={t.compare} className="mt-3 hidden overflow-hidden rounded-xl border border-border md:block">
          <div role="rowgroup">
            <div role="row" className="grid border-b border-border bg-surface" style={{ gridTemplateColumns: cols }}>
              <span role="columnheader" className="px-3.5 py-2.5 text-[12px] font-medium text-muted-foreground">
                {t.topic}
              </span>
              {docs.map((d) => (
                <span key={d.id} role="columnheader" className="min-w-0 border-l border-border px-3.5 py-2.5">
                  <span className="flex items-center gap-1.5 text-[12.5px] font-medium text-foreground">
                    <Icon name="file" size={13} className="shrink-0 text-muted-foreground" />
                    <span className="truncate">{d.title}</span>
                  </span>
                  {d.meta && <span className="block truncate text-[11.5px] text-muted-foreground">{d.meta}</span>}
                </span>
              ))}
              <span role="columnheader" className="border-l border-border px-3.5 py-2.5 text-[12px] font-medium text-muted-foreground">
                {t.compare}
              </span>
            </div>
          </div>
          <div role="rowgroup">
            {shown.map((r, i) => (
              <div key={r.id} role="row" className={cn('asc-up grid border-b border-border last:border-b-0', r.status === 'conflict' && 'bg-[color-mix(in_oklab,var(--destructive)_4%,transparent)]')} style={{ gridTemplateColumns: cols, '--asc-d': `${i * 45}ms` } as React.CSSProperties}>
                <span role="rowheader" className="px-3.5 py-3 text-[13px] font-medium text-foreground">
                  {r.topic}
                  {r.note && <span className="mt-1 block text-[12px] font-normal leading-snug text-muted-foreground">{r.note}</span>}
                </span>
                {docs.map((d) => (
                  <span key={d.id} role="cell" className={cn('border-l border-border px-3.5 py-3 text-[13px] leading-snug', r.values[d.id] ? 'text-foreground' : 'text-subtle-foreground')}>
                    {r.values[d.id] || '·'}
                  </span>
                ))}
                <span role="cell" className="border-l border-border px-3.5 py-3">
                  <StatusTag status={r.status} t={t} />
                </span>
              </div>
            ))}
            {!shown.length && <p className="px-4 py-8 text-center text-[13px] text-muted-foreground">{t.empty}</p>}
          </div>
        </div>

        {/* Cards on phones */}
        <ul className="mt-3 space-y-2 md:hidden">
          {shown.map((r) => (
            <li key={r.id} className={cn('rounded-xl border border-border p-3.5', r.status === 'conflict' && 'border-[color-mix(in_oklab,var(--destructive)_35%,var(--border))]')}>
              <div className="flex items-start justify-between gap-3">
                <p className="text-[13.5px] font-medium text-foreground">{r.topic}</p>
                <StatusTag status={r.status} t={t} />
              </div>
              <dl className="mt-2.5 space-y-1.5">
                {docs.map((d) => (
                  <div key={d.id} className="grid grid-cols-[minmax(0,7rem)_minmax(0,1fr)] gap-3 text-[13px]">
                    <dt className="truncate text-muted-foreground">{d.title}</dt>
                    <dd className={r.values[d.id] ? 'text-foreground' : 'text-subtle-foreground'}>{r.values[d.id] || '·'}</dd>
                  </div>
                ))}
              </dl>
              {r.note && <p className="mt-2 text-[12.5px] leading-snug text-muted-foreground">{r.note}</p>}
            </li>
          ))}
          {!shown.length && <li className="py-6 text-center text-[13px] text-muted-foreground">{t.empty}</li>}
        </ul>

        {missing.length > 0 && (
          <div className="mt-5 rounded-xl border border-dashed border-border-strong p-3.5">
            <SectionLabel icon="search">{t.missing}</SectionLabel>
            <ul className="mt-2 space-y-1">
              {missing.map((m) => (
                <li key={m} className="text-[13.5px] leading-relaxed text-foreground">
                  {m}
                </li>
              ))}
            </ul>
          </div>
        )}
        <Feedback t={t} text={[title, tldr, ...rows.map((r) => `${r.topic}: ${docs.map((d) => `${d.title} ${r.values[d.id] ?? ''}`).join(' | ')}`)].filter(Boolean).join('\n')} onFeedback={onFeedback} onCopy={onCopy} className="mt-5 border-t border-border pt-3" />
      </Reveal>
      <Reveal delay={120} className="mt-4 px-1">
        <Honest t={t} />
      </Reveal>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */

/**
 * An AI summary as a card: a compact one with key points, sources and more
 * behind a fold, a meeting with decisions, action items and the moment to
 * listen to, a document with the passage behind every point, and several
 * documents compared topic by topic. Confidence and open questions are shown,
 * never hidden, with copy and feedback on every card.
 */
export function AiSummaryCard({ variant = 'compact', labels, ...props }: AiSummaryCardProps) {
  const t = useTexts(TEXTS, labels);
  const p: P = { ...props, t };
  switch (variant) {
    case 'meeting':
      return <Meeting {...p} />;
    case 'document':
      return <DocumentView {...p} />;
    case 'compare':
      return <Compare {...p} />;
    default:
      return <Compact {...p} />;
  }
}