Answer feedback

'use client';

import { useEffect, useId, useRef, useState } from 'react';
import { cn, round, 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 FeedbackOnAnswerVariant = 'thumbs' | 'correction' | 'rating-scale' | 'report-dialog' | 'insights';

export interface FeedbackReason {
  id: string;
  label: string;
}

export interface FeedbackDimension {
  id: string;
  label: string;
  /** Words at both ends of the scale */
  low: string;
  high: string;
}

export interface FeedbackComment {
  id: string;
  rating: 'up' | 'down';
  reason?: string;
  text: string;
  question: string;
  time: string;
}

export interface FeedbackOnAnswerProps {
  variant?: FeedbackOnAnswerVariant;
  title?: string;
  /** The answer the feedback is about */
  answer?: { question: string; text: string; assistant?: string };
  /** thumbs: a rating that is already given, the reasons open */
  defaultRating?: 'up' | 'down';
  /** thumbs: reasons for a bad answer and for a good one */
  reasons?: FeedbackReason[];
  praise?: FeedbackReason[];
  /** correction: the sentence to correct */
  wrong?: string;
  /** correction: the corrected sentence already typed in */
  correction?: string;
  /** rating-scale: values already chosen, by dimension id */
  defaultValues?: Record<string, number>;
  /** rating-scale */
  dimensions?: FeedbackDimension[];
  /** report-dialog: start open */
  defaultOpen?: boolean;
  /** insights */
  period?: string;
  positive?: number;
  negative?: number;
  /** insights: share of good ratings per week, 0 to 1 */
  trend?: number[];
  topReasons?: { label: string; count: number }[];
  comments?: FeedbackComment[];
  onSubmit?: (value: Record<string, unknown>) => void;
  labels?: Partial<(typeof TEXTS)['en']>;
  className?: string;
}

const TEXTS = {
  en: {
    helpful: 'Was this answer helpful?',
    good: 'Good answer',
    bad: 'Bad answer',
    whatWrong: 'What was the problem?',
    whatGood: 'What was good?',
    comment: 'Add details (optional)',
    commentPlaceholder: 'What should the answer have said?',
    send: 'Send feedback',
    thanks: 'Thanks. Your feedback helps improve the answers.',
    change: 'Change',
    privacy: 'Your rating and this conversation are reviewed by the product team. They are never shared outside it.',
    
    
    suggest: 'Suggest a correction',
    yourVersion: 'Your correction',
    source: 'Source that shows it (optional)',
    sourcePlaceholder: 'https://',
    preview: 'Preview',
    submit: 'Send correction',
    corrected: 'Correction sent. The team checks it before anything changes.',
    cancel: 'Cancel',
    rate: 'Rate this answer',
    overall: 'Overall',
    sendRating: 'Send rating',
    rated: 'Rating saved.',
    of: '{n} of 5',
    report: 'Report a problem',
    reportTitle: 'Report this answer',
    category: 'What kind of problem?',
    details: 'Details',
    detailsPlaceholder: 'Describe what happened',
    include: 'Include this conversation',
    includeNote: 'The team can read the messages to understand the problem.',
    reported: 'Report received. We answer within two working days.',
    close: 'Close',
    required: 'Choose a kind of problem first.',
    
    positive: 'Helpful',
    negative: 'Not helpful',
    ratio: 'Helpful share',
    topReasons: 'Most named problems',
    recent: 'Latest comments',
    all: 'All',
    weeks: 'Per week',
    question: 'Question',
  },
  de: {
    helpful: 'War diese Antwort hilfreich?',
    good: 'Gute Antwort',
    bad: 'Schlechte Antwort',
    whatWrong: 'Was war das Problem?',
    whatGood: 'Was war gut?',
    comment: 'Details ergänzen (optional)',
    commentPlaceholder: 'Was hätte die Antwort sagen sollen?',
    send: 'Feedback senden',
    thanks: 'Danke. Dein Feedback hilft, die Antworten zu verbessern.',
    change: 'Ändern',
    privacy: 'Deine Bewertung und dieses Gespräch sieht nur das Produktteam. Nichts davon geht nach außen.',
    
    
    suggest: 'Korrektur vorschlagen',
    yourVersion: 'Deine Korrektur',
    source: 'Quelle, die es belegt (optional)',
    sourcePlaceholder: 'https://',
    preview: 'Vorschau',
    submit: 'Korrektur senden',
    corrected: 'Korrektur gesendet. Das Team prüft sie, bevor sich etwas ändert.',
    cancel: 'Abbrechen',
    rate: 'Diese Antwort bewerten',
    overall: 'Gesamt',
    sendRating: 'Bewertung senden',
    rated: 'Bewertung gespeichert.',
    of: '{n} von 5',
    report: 'Problem melden',
    reportTitle: 'Diese Antwort melden',
    category: 'Welche Art von Problem?',
    details: 'Details',
    detailsPlaceholder: 'Beschreib, was passiert ist',
    include: 'Dieses Gespräch mitsenden',
    includeNote: 'Das Team kann die Nachrichten lesen, um das Problem zu verstehen.',
    reported: 'Meldung erhalten. Wir antworten innerhalb von zwei Werktagen.',
    close: 'Schließen',
    required: 'Wähl zuerst eine Art von Problem.',
    
    positive: 'Hilfreich',
    negative: 'Nicht hilfreich',
    ratio: 'Anteil hilfreich',
    topReasons: 'Häufigste Probleme',
    recent: 'Neueste Kommentare',
    all: 'Alle',
    weeks: 'Je Woche',
    question: 'Frage',
  },
};

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

const CSS =
  '@keyframes fba-up{from{opacity:0;transform:translateY(8px)}}@keyframes fba-pop{0%{transform:scale(1)}40%{transform:scale(1.25) rotate(-8deg)}100%{transform:scale(1)}}@keyframes fba-bar{from{transform:scaleX(0)}}@keyframes fba-in{from{opacity:0;transform:translateY(10px) scale(.98)}}@keyframes fba-draw{from{stroke-dashoffset:1}}' +
  '@media (prefers-reduced-motion:no-preference){.fba-up{animation:fba-up .45s var(--ease-kit) var(--fba-d,0ms) both}.fba-pop{animation:fba-pop .5s var(--ease-kit)}.fba-bar{transform-origin:left;animation:fba-bar 1s var(--ease-kit) var(--fba-d,0ms) both}.fba-in{animation:fba-in .35s var(--ease-kit) both}}';

function Style() {
  return (
    <style href="kit-feedback-on-answer" precedence="default">
      {CSS}
    </style>
  );
}

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

function Stage({ title, children, className, wide }: { title?: string; 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)}>
      <div className="kit-container">
        <div className={cn('mx-auto w-full', wide ? 'max-w-[68rem]' : 'max-w-[44rem]')}>
          {title && (
            <Reveal className="mb-6 sm:mb-8">
              <h2 className="text-balance text-[22px] font-semibold leading-tight tracking-[-0.02em] text-foreground sm:text-[26px]">{title}</h2>
            </Reveal>
          )}
          {children}
        </div>
      </div>
    </section>
  );
}

/** The answer card the feedback hangs on */
function AnswerCard({ answer, children, highlight }: { answer?: FeedbackOnAnswerProps['answer']; children?: React.ReactNode; highlight?: string }) {
  if (!answer) return <>{children}</>;
  const parts = highlight && answer.text.includes(highlight) ? answer.text.split(highlight) : null;
  return (
    <div className="rounded-2xl border border-border bg-card shadow-[var(--highlight),var(--shadow-md)]">
      <div className="space-y-4 p-5 sm:p-6">
        <p className="ml-auto w-fit max-w-[85%] rounded-2xl rounded-br-md bg-[color-mix(in_oklab,var(--primary)_12%,var(--card))] px-4 py-2.5 text-[14.5px] text-foreground">{answer.question}</p>
        <div className="flex gap-3">
          <span aria-hidden className="grid size-8 shrink-0 place-items-center rounded-full bg-[color-mix(in_oklab,var(--primary)_14%,var(--card))] text-primary">
            <Icon name="sparkle" size={16} />
          </span>
          <div className="min-w-0 flex-1">
            {answer.assistant && <p className="mb-1 text-[12.5px] font-medium text-muted-foreground">{answer.assistant}</p>}
            <p className="text-pretty text-[15px] leading-relaxed text-foreground">
              {parts ? (
                <>
                  {parts[0]}
                  <mark className="rounded-[3px] bg-[color-mix(in_oklab,var(--destructive)_16%,transparent)] text-foreground underline decoration-[color-mix(in_oklab,var(--destructive)_70%,transparent)] decoration-wavy underline-offset-4 [box-decoration-break:clone]">{highlight}</mark>
                  {parts[1]}
                </>
              ) : (
                answer.text
              )}
            </p>
          </div>
        </div>
      </div>
      {children}
    </div>
  );
}

const chip = 'focus-visible:-outline-offset-2 inline-flex min-h-11 items-center gap-1.5 rounded-lg border px-3 text-[13px] font-medium transition-[background-color,border-color,color] duration-200 sm:min-h-9';
const chipOn = 'border-[color-mix(in_oklab,var(--primary)_50%,var(--border))] bg-[color-mix(in_oklab,var(--primary)_12%,var(--card))] text-foreground';
const chipOff = 'border-border bg-background text-muted-foreground hover:text-foreground hover:border-border-strong';
const primaryBtn = 'inline-flex h-11 items-center justify-center gap-1.5 rounded-lg bg-primary px-4 text-[13.5px] font-medium text-primary-foreground shadow-[inset_0_1px_0_rgb(255_255_255/0.18),var(--shadow-sm)] transition-colors hover:bg-[color-mix(in_oklab,var(--primary)_88%,var(--background))] disabled:bg-[color-mix(in_oklab,var(--foreground)_8%,var(--card))] disabled:text-subtle-foreground disabled:shadow-none sm:h-9';
const quietBtn = 'inline-flex h-11 items-center justify-center gap-1.5 rounded-lg border border-border bg-card px-4 text-[13.5px] font-medium text-foreground transition-colors hover:bg-accent sm:h-9';
const field = 'w-full rounded-xl border border-border bg-background px-3.5 py-2.5 text-[14.5px] text-foreground outline-none transition-[border-color,box-shadow] placeholder:text-subtle-foreground focus:border-[color-mix(in_oklab,var(--primary)_55%,var(--border))] focus:shadow-[0_0_0_4px_color-mix(in_oklab,var(--primary)_14%,transparent)] focus-visible:outline-none';

function Done({ children }: { children: React.ReactNode }) {
  return (
    <p role="status" className="fba-up flex items-start gap-2 text-[13.5px] leading-snug text-success-foreground">
      <Icon name="check-circle" size={16} className="mt-px shrink-0" />
      {children}
    </p>
  );
}

/* ------------------------------------------------------------------ */
/* thumbs                                                              */
/* ------------------------------------------------------------------ */

function Thumbs({ t, title, answer, reasons = [], praise = [], defaultRating, onSubmit, className }: P) {
  const [rating, setRating] = useState<'up' | 'down' | null>(defaultRating ?? null);
  const [picked, setPicked] = useState<string[]>([]);
  const [note, setNote] = useState('');
  const [sent, setSent] = useState(false);
  const [pop, setPop] = useState(0);
  const list = rating === 'up' ? praise : reasons;
  const rate = (r: 'up' | 'down') => {
    setRating(rating === r ? null : r);
    setPicked([]);
    setSent(false);
    setPop((n) => n + 1);
  };
  return (
    <Stage title={title} className={className}>
      <Reveal effect="scale" delay={60}>
        <AnswerCard answer={answer}>
          <div className="border-t border-border px-5 py-3.5 sm:px-6">
            <div className="flex flex-wrap items-center gap-x-3 gap-y-2">
              <p className="mr-auto text-[13.5px] text-muted-foreground">{t.helpful}</p>
              <div className="flex gap-1.5">
                {(['up', 'down'] as const).map((r) => (
                  <button
                    key={r}
                    type="button"
                    aria-pressed={rating === r}
                    aria-label={r === 'up' ? t.good : t.bad}
                    onClick={() => rate(r)}
                    className={cn('grid size-11 place-items-center rounded-lg border transition-colors duration-200 sm:size-9', rating === r ? (r === 'up' ? 'border-[color-mix(in_oklab,var(--success)_50%,var(--border))] bg-[color-mix(in_oklab,var(--success)_14%,var(--card))] text-success-foreground' : 'border-[color-mix(in_oklab,var(--destructive)_45%,var(--border))] bg-[color-mix(in_oklab,var(--destructive)_12%,var(--card))] text-destructive') : 'border-border text-muted-foreground hover:bg-accent hover:text-foreground')}
                  >
                    <Icon key={rating === r ? pop : 0} name={r === 'up' ? 'thumbs-up' : 'thumbs-down'} size={17} className={rating === r ? 'fba-pop' : undefined} />
                  </button>
                ))}
              </div>
            </div>
            <div className={cn('grid transition-[grid-template-rows] duration-500 ease-[var(--ease-kit)] motion-reduce:transition-none', rating ? 'grid-rows-[1fr]' : 'grid-rows-[0fr]')}>
              <div className="overflow-hidden" inert={!rating || undefined}>
                <div className="pt-4">
                  {sent ? (
                    <div className="flex items-center justify-between gap-3">
                      <Done>{t.thanks}</Done>
                      <button type="button" onClick={() => setSent(false)} className="inline-flex h-11 shrink-0 items-center rounded-md px-2 text-[13px] font-medium text-foreground hover:bg-accent sm:h-8">
                        {t.change}
                      </button>
                    </div>
                  ) : (
                    <form
                      onSubmit={(e) => {
                        e.preventDefault();
                        onSubmit?.({ rating, reasons: picked, note });
                        setSent(true);
                      }}
                    >
                      <fieldset>
                        <legend className="mb-2 text-[13px] font-medium text-foreground">{rating === 'up' ? t.whatGood : t.whatWrong}</legend>
                        <div className="flex flex-wrap gap-2">
                          {list.map((r, i) => {
                            const on = picked.includes(r.id);
                            return (
                              <button key={`${rating}-${r.id}`} type="button" aria-pressed={on} onClick={() => setPicked((p) => (on ? p.filter((x) => x !== r.id) : [...p, r.id]))} className={cn(chip, on ? chipOn : chipOff, 'fba-up')} style={{ '--fba-d': `${i * 40}ms` } as React.CSSProperties}>
                                {on && <Icon name="check" size={14} />}
                                {r.label}
                              </button>
                            );
                          })}
                        </div>
                      </fieldset>
                      <label className="mt-3 block">
                        <span className="mb-1.5 block text-[12.5px] text-muted-foreground">{t.comment}</span>
                        <textarea rows={2} value={note} onChange={(e) => setNote(e.target.value)} placeholder={t.commentPlaceholder} className={cn(field, 'resize-none [field-sizing:content] min-h-[4.5rem]')} />
                      </label>
                      <div className="mt-3 flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between">
                        <p className="flex items-start gap-1.5 text-[12px] leading-snug text-muted-foreground">
                          <Icon name="lock" size={13} className="mt-px shrink-0" />
                          {t.privacy}
                        </p>
                        <button type="submit" disabled={!picked.length && !note.trim()} className={cn(primaryBtn, 'shrink-0')}>
                          {t.send}
                        </button>
                      </div>
                    </form>
                  )}
                </div>
              </div>
            </div>
          </div>
        </AnswerCard>
      </Reveal>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */
/* correction                                                          */
/* ------------------------------------------------------------------ */

function Correction({ t, title, answer, wrong = '', correction, onSubmit, className }: P) {
  const [open, setOpen] = useState(true);
  const [text, setText] = useState(correction ?? wrong);
  const [src, setSrc] = useState('');
  const [sent, setSent] = useState(false);
  const area = useRef<HTMLTextAreaElement>(null);
  const changed = text.trim() !== wrong.trim() && text.trim().length > 0;
  return (
    <Stage title={title} className={className}>
      <Reveal effect="scale" delay={60}>
        <AnswerCard answer={answer} highlight={sent ? undefined : wrong}>
          <div className="border-t border-border px-5 py-4 sm:px-6">
            {!open && !sent && (
              <button type="button" onClick={() => (setOpen(true), requestAnimationFrame(() => area.current?.focus()))} className={quietBtn}>
                <Icon name="edit" size={15} />
                {t.suggest}
              </button>
            )}
            {sent && <Done>{t.corrected}</Done>}
            {open && !sent && (
              <form
                className="fba-up"
                onSubmit={(e) => {
                  e.preventDefault();
                  if (!changed) return;
                  onSubmit?.({ before: wrong, after: text, source: src });
                  setSent(true);
                }}
              >
                <label className="block">
                  <span className="mb-1.5 flex items-center gap-1.5 text-[13px] font-medium text-foreground">
                    <Icon name="edit" size={14} className="text-primary" />
                    {t.yourVersion}
                  </span>
                  <textarea ref={area} rows={3} value={text} onChange={(e) => setText(e.target.value)} className={cn(field, 'resize-none [field-sizing:content] min-h-[5.5rem]')} />
                </label>
                {changed && (
                  <div className="fba-up mt-3 rounded-xl border border-border bg-background/60 p-3.5">
                    <p className="mb-1.5 text-[12px] font-medium text-subtle-foreground">{t.preview}</p>
                    <p className="text-[13.5px] leading-relaxed">
                      <del className="text-muted-foreground decoration-[color-mix(in_oklab,var(--destructive)_60%,transparent)]">{wrong}</del>
                    </p>
                    <p className="mt-1 text-[13.5px] leading-relaxed">
                      <ins className="rounded-[3px] bg-[color-mix(in_oklab,var(--success)_14%,transparent)] text-foreground no-underline [box-decoration-break:clone]">{text}</ins>
                    </p>
                  </div>
                )}
                <label className="mt-3 block">
                  <span className="mb-1.5 block text-[12.5px] text-muted-foreground">{t.source}</span>
                  <input type="url" inputMode="url" value={src} onChange={(e) => setSrc(e.target.value)} placeholder={t.sourcePlaceholder} className={cn(field, 'h-11 py-0')} />
                </label>
                <div className="mt-4 flex flex-wrap justify-end gap-2">
                  <button type="button" onClick={() => (setOpen(false), setText(wrong))} className={quietBtn}>
                    {t.cancel}
                  </button>
                  <button type="submit" disabled={!changed} className={primaryBtn}>
                    {t.submit}
                  </button>
                </div>
              </form>
            )}
          </div>
        </AnswerCard>
      </Reveal>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */
/* rating-scale                                                        */
/* ------------------------------------------------------------------ */

function RatingScale({ t, title, answer, dimensions = [], defaultValues, onSubmit, className }: P) {
  const locale = useLocale();
  const [values, setValues] = useState<Record<string, number>>(defaultValues ?? {});
  const [sent, setSent] = useState(false);
  const rated = dimensions.filter((d) => values[d.id]);
  const avg = rated.length ? rated.reduce((s, d) => s + values[d.id], 0) / rated.length : 0;
  const refs = useRef<Record<string, (HTMLButtonElement | null)[]>>({});
  const nf = (n: number) => n.toLocaleString(locale === 'de' ? 'de-DE' : 'en-US', { minimumFractionDigits: 1, maximumFractionDigits: 1 });
  return (
    <Stage title={title} className={className}>
      <Reveal effect="scale" delay={60}>
        <AnswerCard answer={answer}>
          <form
            className="border-t border-border px-5 py-5 sm:px-6"
            onSubmit={(e) => {
              e.preventDefault();
              onSubmit?.(values);
              setSent(true);
            }}
          >
            <div className="mb-4 flex items-baseline justify-between gap-3">
              <p className="text-[14px] font-medium text-foreground">{t.rate}</p>
              <p className="min-h-6 text-[13px] tabular-nums text-muted-foreground" aria-live="polite">
                {avg > 0 && (
                  <span className="fba-up">
                    {t.overall} <span className="text-[17px] font-semibold text-foreground">{nf(avg)}</span> / 5
                  </span>
                )}
              </p>
            </div>
            <Stagger step={70} className="space-y-4">
              {dimensions.map((d) => {
                const v = values[d.id] ?? 0;
                return (
                  <div key={d.id} role="radiogroup" aria-label={d.label}>
                    <div className="mb-2 flex items-baseline justify-between gap-3">
                      <span className="text-[13.5px] font-medium text-foreground">{d.label}</span>
                      <span className="text-[12px] tabular-nums text-subtle-foreground">{v ? fill(t.of, { n: v }) : ''}</span>
                    </div>
                    <div className="grid grid-cols-5 gap-1.5">
                      {[1, 2, 3, 4, 5].map((n) => {
                        const on = n <= v;
                        return (
                          <button
                            key={n}
                            ref={(el) => {
                              (refs.current[d.id] ??= [])[n - 1] = el;
                            }}
                            type="button"
                            role="radio"
                            aria-checked={v === n}
                            aria-label={`${d.label}, ${fill(t.of, { n })}`}
                            tabIndex={v === n || (!v && n === 1) ? 0 : -1}
                            disabled={sent}
                            onClick={() => setValues((s) => ({ ...s, [d.id]: n }))}
                            onKeyDown={(e) => {
                              const dir = ['ArrowRight', 'ArrowUp'].includes(e.key) ? 1 : ['ArrowLeft', 'ArrowDown'].includes(e.key) ? -1 : 0;
                              if (!dir) return;
                              e.preventDefault();
                              const next = Math.min(5, Math.max(1, (v || n) + dir));
                              setValues((s) => ({ ...s, [d.id]: next }));
                              refs.current[d.id]?.[next - 1]?.focus();
                            }}
                            className={cn('h-11 rounded-lg border transition-[background-color,border-color,transform] duration-300 ease-[var(--ease-kit)] active:scale-95 sm:h-9', on ? 'border-transparent bg-primary' : 'border-border bg-background hover:border-border-strong')}
                            style={{ transitionDelay: on ? `${(n - 1) * 35}ms` : '0ms' }}
                          >
                            <span className={cn('text-[12.5px] font-semibold tabular-nums', on ? 'text-primary-foreground' : 'text-muted-foreground')}>{n}</span>
                          </button>
                        );
                      })}
                    </div>
                    <div className="mt-1.5 flex justify-between text-[11.5px] text-subtle-foreground">
                      <span>{d.low}</span>
                      <span>{d.high}</span>
                    </div>
                  </div>
                );
              })}
            </Stagger>
            <div className="mt-5 flex items-center justify-between gap-3">
              {sent ? <Done>{t.rated}</Done> : <span />}
              {!sent && (
                <button type="submit" disabled={rated.length < dimensions.length} className={primaryBtn}>
                  {t.sendRating}
                </button>
              )}
            </div>
          </form>
        </AnswerCard>
      </Reveal>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */
/* report-dialog                                                       */
/* ------------------------------------------------------------------ */

function ReportDialog({ t, title, answer, reasons = [], defaultOpen = true, onSubmit, className }: P) {
  const [open, setOpen] = useState(defaultOpen);
  const [kind, setKind] = useState('');
  const [details, setDetails] = useState('');
  const [include, setInclude] = useState(true);
  const [sent, setSent] = useState(false);
  const [error, setError] = useState(false);
  const id = useId();
  const dialog = useRef<HTMLDivElement>(null);
  const opener = useRef<HTMLButtonElement>(null);

  useEffect(() => {
    if (!open) return;
    const el = dialog.current;
    const keys = (e: KeyboardEvent) => {
      if (e.key === 'Escape') {
        setOpen(false);
        opener.current?.focus();
      }
      if (e.key !== 'Tab' || !el) return;
      const f = Array.from(el.querySelectorAll<HTMLElement>('button, input, textarea, [tabindex="0"]')).filter((x) => !x.hasAttribute('disabled'));
      if (!f.length) return;
      if (e.shiftKey && document.activeElement === f[0]) (e.preventDefault(), f[f.length - 1].focus());
      else if (!e.shiftKey && document.activeElement === f[f.length - 1]) (e.preventDefault(), f[0].focus());
    };
    document.addEventListener('keydown', keys);
    return () => document.removeEventListener('keydown', keys);
  }, [open]);

  return (
    <Stage title={title} className={className}>
      {/* Card and dialog share one grid cell, so the cell grows with the taller one and nothing is cut */}
      <div className="relative grid">
        <Reveal effect="scale" delay={60} className="[grid-area:1/1]">
          <AnswerCard answer={answer}>
            <div className="flex items-center justify-between gap-3 border-t border-border px-5 py-3 sm:px-6">
              <span className="text-[12.5px] text-muted-foreground">{answer?.assistant}</span>
              <button ref={opener} type="button" aria-haspopup="dialog" aria-expanded={open} onClick={() => (setOpen(true), setSent(false), requestAnimationFrame(() => dialog.current?.querySelector<HTMLElement>('input, button:not([aria-label])')?.focus()))} className="inline-flex h-11 items-center gap-1.5 rounded-lg px-2.5 text-[13px] font-medium text-muted-foreground hover:bg-accent hover:text-foreground sm:h-8">
                <Icon name="flag" size={15} />
                {t.report}
              </button>
            </div>
          </AnswerCard>
        </Reveal>
        {open && (
          <>
            <div aria-hidden className="fba-up -m-3 rounded-[1.5rem] bg-scrim backdrop-blur-[2px] [grid-area:1/1] sm:-m-4" onClick={() => setOpen(false)} />
            <div
              ref={dialog}
              role="dialog"
              aria-modal="true"
              aria-labelledby={`${id}-t`}
              className="fba-in relative z-10 mx-auto mb-2 mt-6 h-fit w-full max-w-[30rem] self-start rounded-2xl border border-border bg-card shadow-[var(--highlight),var(--shadow-lg)] [grid-area:1/1] sm:mt-10"
            >
              <div className="flex items-center justify-between gap-3 border-b border-border px-5 py-3.5">
                <h3 id={`${id}-t`} className="text-[15.5px] font-semibold text-foreground">
                  {t.reportTitle}
                </h3>
                <button type="button" aria-label={t.close} onClick={() => (setOpen(false), opener.current?.focus())} className="grid size-11 place-items-center rounded-lg text-muted-foreground hover:bg-accent hover:text-foreground sm:size-8">
                  <Icon name="x" size={17} />
                </button>
              </div>
              {sent ? (
                <div className="px-5 py-8 text-center">
                  <span className="mx-auto grid size-12 place-items-center rounded-full bg-[color-mix(in_oklab,var(--success)_15%,var(--card))] text-success-foreground">
                    <Icon name="check" size={22} />
                  </span>
                  <p className="mx-auto mt-4 max-w-[20rem] text-pretty text-[14px] leading-relaxed text-foreground" role="status">
                    {t.reported}
                  </p>
                  <button type="button" onClick={() => (setOpen(false), opener.current?.focus())} className={cn(quietBtn, 'mt-5')}>
                    {t.close}
                  </button>
                </div>
              ) : (
                <form
                  noValidate
                  className="px-5 py-4"
                  onSubmit={(e) => {
                    e.preventDefault();
                    if (!kind) return setError(true);
                    onSubmit?.({ kind, details, include });
                    setSent(true);
                  }}
                >
                  <fieldset>
                    <legend className="mb-2 text-[13px] font-medium text-foreground">{t.category}</legend>
                    <div className="grid grid-cols-1 gap-1.5 sm:grid-cols-2">
                      {reasons.map((r) => (
                        <label key={r.id} className={cn('flex min-h-11 cursor-pointer items-center gap-2.5 rounded-lg border px-3 text-[13.5px] transition-colors', kind === r.id ? chipOn : 'border-border text-foreground hover:bg-accent/60')}>
                          <input type="radio" name={`${id}-kind`} value={r.id} checked={kind === r.id} onChange={() => (setKind(r.id), setError(false))} className="size-4 accent-[var(--primary)]" />
                          {r.label}
                        </label>
                      ))}
                    </div>
                    {error && (
                      <p role="alert" className="fba-up mt-2 flex items-center gap-1.5 text-[12.5px] text-destructive">
                        <Icon name="alert-circle" size={14} />
                        {t.required}
                      </p>
                    )}
                  </fieldset>
                  <label className="mt-3 block">
                    <span className="mb-1.5 block text-[13px] font-medium text-foreground">{t.details}</span>
                    <textarea rows={3} value={details} onChange={(e) => setDetails(e.target.value)} placeholder={t.detailsPlaceholder} className={cn(field, 'resize-none')} />
                  </label>
                  <label className="mt-3 flex cursor-pointer items-start gap-2.5 rounded-xl bg-background/60 p-3">
                    <input type="checkbox" checked={include} onChange={(e) => setInclude(e.target.checked)} className="mt-0.5 size-4 shrink-0 accent-[var(--primary)]" />
                    <span>
                      <span className="block text-[13.5px] font-medium text-foreground">{t.include}</span>
                      <span className="block text-[12.5px] leading-snug text-muted-foreground">{t.includeNote}</span>
                    </span>
                  </label>
                  <div className="mt-4 flex justify-end gap-2">
                    <button type="button" onClick={() => (setOpen(false), opener.current?.focus())} className={quietBtn}>
                      {t.cancel}
                    </button>
                    <button type="submit" className={primaryBtn}>
                      {t.report}
                    </button>
                  </div>
                </form>
              )}
            </div>
          </>
        )}
      </div>
    </Stage>
  );
}

/* ------------------------------------------------------------------ */
/* insights                                                            */
/* ------------------------------------------------------------------ */

function Insights({ t, title, period, positive = 0, negative = 0, trend = [], topReasons = [], comments = [], className }: P) {
  const locale = useLocale();
  const [filter, setFilter] = useState<'all' | 'up' | 'down'>('all');
  const total = positive + negative;
  const share = total ? positive / total : 0;
  const pct = (n: number) => (locale === 'de' ? `${Math.round(n * 100)} %` : `${Math.round(n * 100)}%`);
  const maxReason = Math.max(1, ...topReasons.map((r) => r.count));
  const shown = comments.filter((c) => filter === 'all' || c.rating === filter);
  const w = 160;
  const h = 44;
  const pts = trend.map((v, i) => [round((i / Math.max(1, trend.length - 1)) * w), round(h - 4 - v * (h - 8))]);
  const path = pts.map(([x, y], i) => `${i ? 'L' : 'M'}${x} ${y}`).join(' ');

  return (
    <Stage title={title} className={className} wide>
      <div className="grid grid-cols-1 gap-4 lg:grid-cols-[minmax(0,1fr)_minmax(0,1.3fr)] lg:gap-6">
        <div className="space-y-4">
          <Reveal delay={60}>
            <div className="rounded-2xl border border-border bg-card p-5 shadow-[var(--highlight),var(--shadow-sm)]">
              <div className="flex items-start justify-between gap-4">
                <div>
                  <p className="text-[12.5px] text-muted-foreground">{t.ratio}</p>
                  <p className="mt-1 text-[32px] font-semibold leading-none tracking-[-0.02em] tabular-nums text-foreground">{pct(share)}</p>
                  <p className="mt-1.5 text-[12px] text-subtle-foreground">{period}</p>
                </div>
                {pts.length > 1 && (
                  <svg aria-hidden viewBox={`0 0 ${w} ${h}`} className="h-11 w-40 overflow-visible">
                    <path d={`${path} L${w} ${h} L0 ${h} Z`} style={{ fill: 'color-mix(in oklab, var(--success) 14%, transparent)' }} />
                    <path d={path} fill="none" stroke="var(--success)" strokeWidth="1.6" strokeLinejoin="round" pathLength={1} className="[stroke-dasharray:1] motion-safe:animate-[fba-draw_1.2s_var(--ease-kit)_both]" />
                    <circle cx={pts[pts.length - 1][0]} cy={pts[pts.length - 1][1]} r="2.6" fill="var(--success)" />
                    <title>{t.weeks}</title>
                  </svg>
                )}
              </div>
              <div aria-hidden className="mt-4 flex h-2.5 overflow-hidden rounded-full bg-[color-mix(in_oklab,var(--destructive)_55%,var(--card))]">
                <span className="fba-bar h-full rounded-r-full bg-success" style={{ width: `${round(share * 100, 1)}%` }} />
              </div>
              <div className="mt-2.5 flex justify-between text-[12.5px] tabular-nums">
                <span className="flex items-center gap-1.5 text-success-foreground">
                  <Icon name="thumbs-up" size={14} />
                  {t.positive} {positive.toLocaleString(locale === 'de' ? 'de-DE' : 'en-US')}
                </span>
                <span className="flex items-center gap-1.5 text-destructive">
                  {t.negative} {negative.toLocaleString(locale === 'de' ? 'de-DE' : 'en-US')}
                  <Icon name="thumbs-down" size={14} />
                </span>
              </div>
            </div>
          </Reveal>
          <Reveal delay={140}>
            <div className="rounded-2xl border border-border bg-card p-5 shadow-[var(--highlight),var(--shadow-sm)]">
              <p className="mb-3 text-[13px] font-medium text-foreground">{t.topReasons}</p>
              <ul className="space-y-3">
                {topReasons.map((r, i) => (
                  <li key={r.label}>
                    <div className="mb-1 flex justify-between gap-3 text-[13px]">
                      <span className="text-foreground">{r.label}</span>
                      <span className="tabular-nums text-muted-foreground">{r.count}</span>
                    </div>
                    <div className="h-1.5 overflow-hidden rounded-full bg-[color-mix(in_oklab,var(--foreground)_8%,transparent)]">
                      <span className="fba-bar block h-full rounded-full bg-[color-mix(in_oklab,var(--destructive)_70%,var(--card))]" style={{ width: `${round((r.count / maxReason) * 100, 1)}%`, '--fba-d': `${200 + i * 90}ms` } as React.CSSProperties} />
                    </div>
                  </li>
                ))}
              </ul>
            </div>
          </Reveal>
        </div>
        <Reveal delay={200}>
          <div className="rounded-2xl border border-border bg-card shadow-[var(--highlight),var(--shadow-sm)]">
            <div className="flex flex-wrap items-center justify-between gap-3 border-b border-border px-5 py-3">
              <p className="text-[13px] font-medium text-foreground">{t.recent}</p>
              <div role="group" aria-label={t.recent} className="flex gap-1 rounded-lg bg-[color-mix(in_oklab,var(--foreground)_5%,transparent)] p-1">
                {(
                  [
                    ['all', t.all, null],
                    ['up', t.positive, 'thumbs-up'],
                    ['down', t.negative, 'thumbs-down'],
                  ] as [typeof filter, string, IconName | null][]
                ).map(([k, label, icon]) => (
                  <button key={k} type="button" aria-pressed={filter === k} onClick={() => setFilter(k)} className={cn('inline-flex h-11 min-w-11 items-center justify-center gap-1.5 rounded-md px-2.5 text-[12.5px] font-medium transition-colors sm:h-8 sm:min-w-0', filter === k ? 'bg-card text-foreground shadow-[var(--highlight),var(--shadow-sm)]' : 'text-muted-foreground hover:text-foreground')}>
                    {icon && <Icon name={icon} size={13} />}
                    <span className={icon ? 'max-sm:sr-only' : undefined}>{label}</span>
                  </button>
                ))}
              </div>
            </div>
            <ul className="divide-y divide-border">
              {shown.map((c, i) => (
                <li key={`${filter}-${c.id}`} className="fba-up flex gap-3 px-5 py-4" style={{ '--fba-d': `${i * 50}ms` } as React.CSSProperties}>
                  <span className={cn('mt-0.5 grid size-7 shrink-0 place-items-center rounded-full', c.rating === 'up' ? 'bg-[color-mix(in_oklab,var(--success)_15%,var(--card))] text-success-foreground' : 'bg-[color-mix(in_oklab,var(--destructive)_13%,var(--card))] text-destructive')}>
                    <Icon name={c.rating === 'up' ? 'thumbs-up' : 'thumbs-down'} size={13} />
                  </span>
                  <div className="min-w-0 flex-1">
                    <p className="text-pretty text-[14px] leading-relaxed text-foreground">{c.text}</p>
                    <p className="mt-1 truncate text-[12.5px] text-muted-foreground">
                      {t.question} · {c.question}
                    </p>
                    <p className="mt-1.5 flex flex-wrap items-center gap-x-2 gap-y-1 text-[12px] text-subtle-foreground">
                      {c.reason && <span className="rounded-md bg-[color-mix(in_oklab,var(--foreground)_7%,transparent)] px-1.5 py-0.5 text-muted-foreground">{c.reason}</span>}
                      {c.time}
                    </p>
                  </div>
                </li>
              ))}
            </ul>
          </div>
        </Reveal>
      </div>
    </Stage>
  );
}

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

/**
 * Feedback on AI answers: thumbs with reasons and a comment, a correction
 * with preview and source, a rating on several scales, a report dialog with
 * privacy choice and an insights view for the team.
 */
export function FeedbackOnAnswer({ variant = 'thumbs', labels, ...props }: FeedbackOnAnswerProps) {
  const t = useTexts(TEXTS, labels);
  const p: P = { ...props, t };
  const body = (() => {
    switch (variant) {
      case 'correction':
        return <Correction {...p} />;
      case 'rating-scale':
        return <RatingScale {...p} />;
      case 'report-dialog':
        return <ReportDialog {...p} />;
      case 'insights':
        return <Insights {...p} />;
      default:
        return <Thumbs {...p} />;
    }
  })();
  return (
    <>
      <Style />
      {body}
    </>
  );
}