File request

'use client';

import { useId, useRef, useState } from 'react';
import { cn, round, useLocale, useTexts } from '@/lib/kit';
import { Button } from '@/components/ui/button';
import { Icon, type IconName } from '@/components/ui/icon';
import { NativeSelect } from '@/components/ui/select';
import { Reveal } from '@/components/ui/reveal';
import { Section } from '@/components/ui/section';
import { Stagger } from '@/components/ui/motion';
import { DonePanel, ErrorSummary, FlowHead, type DoneStep, type FlowError } from '@/components/ui/form-flow';

/*
 * Asking for documents and getting them back complete. Every document has
 * its own place, the list says what is still missing, and files are checked
 * for type and size on the way in, with a reason when they are refused.
 *
 *   checklist      one row per document with its own upload, a bar fills to complete
 *   single-drop    drop everything at once, files sort themselves into the list
 *   portal         a request from a firm with a deadline, a note per document and a lock
 *   review-status  what came back: accepted, in review, or a new version needed with the reason
 *
 * Sends { [documentId]: File[] } to `onSubmit`.
 */

export type FileRequestVariant = 'checklist' | 'single-drop' | 'portal' | 'review-status';

export interface RequestedDocument {
  id: string;
  title: string;
  hint?: string;
  icon?: IconName;
  optional?: boolean;
  /** Accepted types, e.g. ".pdf,image/*" */
  accept?: string;
  /** Most files for this document */
  max?: number;
  /** single-drop: words in a file name that belong to this document */
  keywords?: string[];
  /** portal: a note from the person who asks */
  note?: string;
  /** review-status: where it stands */
  status?: 'accepted' | 'review' | 'rejected' | 'missing';
  /** review-status: why a new version is needed */
  reason?: string;
  /** review-status: the file already sent */
  file?: string;
}

export interface FileRequestProps {
  variant?: FileRequestVariant;
  eyebrow?: React.ReactNode;
  title?: React.ReactNode;
  description?: React.ReactNode;
  documents: RequestedDocument[];
  /** Largest file in megabytes, default 20 */
  maxMb?: number;
  /** portal: who asks, until when, and a short message */
  requester?: { name: string; person?: string; initials?: string; message?: string; deadline?: string; daysLeft?: number };
  steps?: DoneStep[];
  submitLabel?: string;
  done?: { title: string; text?: string };
  onSubmit?: (files: Record<string, File[]>) => void;
  labels?: Partial<Texts>;
  className?: string;
}

const TEXTS = {
  en: {
    upload: 'Add file',
    replace: 'Replace',
    remove: 'Remove {f}',
    optional: 'Optional',
    done: '{n} of {total} ready',
    complete: 'Everything is here',
    missing: 'Still missing',
    send: 'Send documents',
    tooBig: '{f} is larger than {n} MB. Please make it smaller or send it as a PDF, so it comes through.',
    wrongType: '{f} is not a type we can open here. Please use {a}.',
    tooMany: 'Please add at most {n} files here.',
    needed: 'Please add this document, we cannot finish without it.',
    drop: 'Drop all files here',
    dropOr: 'or choose them from your device',
    dropHint: 'We sort them into the list by their names. Change the place if we guessed wrong.',
    unsorted: 'Not sorted yet',
    pickPlace: 'Choose where it belongs',
    unsortedNeeded: 'Please choose where {f} belongs, so we file it right.',
    from: 'Request from {n}',
    due: 'Please send by {d}',
    daysLeft: '{n} days left',
    secure: 'Encrypted and only visible to {n}',
    note: 'Note',
    accepted: 'Accepted',
    review: 'In review',
    rejected: 'New version needed',
    notYet: 'Not sent yet',
    newVersion: 'Send new version',
    sendUpdates: 'Send the new versions',
    doneTitle: 'Thank you, your documents are with us',
    doneText: 'We check them within two working days and tell you if anything is missing.',
    again: 'Add more documents',
    choose: 'Choose file',
  },
  de: {
    upload: 'Datei hinzufügen',
    replace: 'Ersetzen',
    remove: '{f} entfernen',
    optional: 'Optional',
    done: '{n} von {total} bereit',
    complete: 'Alles da',
    missing: 'Fehlt noch',
    send: 'Unterlagen senden',
    tooBig: '{f} ist größer als {n} MB. Bitte verkleinere die Datei oder schick sie als PDF, damit sie durchkommt.',
    wrongType: '{f} ist kein Format, das wir hier öffnen können. Bitte nutze {a}.',
    tooMany: 'Bitte füge hier höchstens {n} Dateien hinzu.',
    needed: 'Bitte füge diese Unterlage hinzu, ohne sie können wir nicht abschließen.',
    drop: 'Alle Dateien hier ablegen',
    dropOr: 'oder vom Gerät auswählen',
    dropHint: 'Wir ordnen sie anhand der Namen in die Liste ein. Ändere den Platz, wenn wir falsch geraten haben.',
    unsorted: 'Noch nicht eingeordnet',
    pickPlace: 'Wähle, wohin sie gehört',
    unsortedNeeded: 'Bitte wähle, wohin {f} gehört, damit wir sie richtig ablegen.',
    from: 'Anfrage von {n}',
    due: 'Bitte bis {d} senden',
    daysLeft: 'noch {n} Tage',
    secure: 'Verschlüsselt und nur für {n} sichtbar',
    note: 'Hinweis',
    accepted: 'Angenommen',
    review: 'Wird geprüft',
    rejected: 'Neue Fassung nötig',
    notYet: 'Noch nicht gesendet',
    newVersion: 'Neue Fassung senden',
    sendUpdates: 'Neue Fassungen senden',
    doneTitle: 'Danke, deine Unterlagen sind bei uns',
    doneText: 'Wir prüfen sie innerhalb von zwei Werktagen und sagen Bescheid, falls etwas fehlt.',
    again: 'Weitere Unterlagen hinzufügen',
    choose: 'Datei wählen',
  },
};

type Texts = (typeof TEXTS)['en'];

const fmtSize = (b: number, locale: 'en' | 'de') => {
  const mb = b / 1e6;
  const n = mb >= 1 ? round(mb, 1) : round(b / 1e3, 0);
  return `${n.toLocaleString(locale === 'de' ? 'de-DE' : 'en-US')} ${mb >= 1 ? 'MB' : 'KB'}`;
};

/** Does the file match an accept string like ".pdf,image/*"? */
function accepts(file: File, accept?: string) {
  if (!accept) return true;
  const name = file.name.toLowerCase();
  return accept.split(',').some((a) => {
    const x = a.trim().toLowerCase();
    if (x.startsWith('.')) return name.endsWith(x);
    if (x.endsWith('/*')) return file.type.startsWith(x.slice(0, -1));
    return file.type === x;
  });
}

const readable = (accept?: string) => (accept ?? '').split(',').map((a) => a.trim().replace(/^\./, '').replace('image/*', 'JPG, PNG').toUpperCase()).join(', ');

/** Files per document with the checks every variant shares */
function useFiles(p: FileRequestProps, t: Texts) {
  const [files, setFiles] = useState<Record<string, File[]>>({});
  const [errors, setErrors] = useState<Record<string, string>>({});
  const max = (p.maxMb ?? 20) * 1e6;
  const add = (doc: RequestedDocument, list: File[]) => {
    const current = files[doc.id] ?? [];
    for (const f of list) {
      if (!accepts(f, doc.accept)) return setErrors((e) => ({ ...e, [doc.id]: t.wrongType.replace('{f}', f.name).replace('{a}', readable(doc.accept)) }));
      if (f.size > max) return setErrors((e) => ({ ...e, [doc.id]: t.tooBig.replace('{f}', f.name).replace('{n}', String(p.maxMb ?? 20)) }));
    }
    if (current.length + list.length > (doc.max ?? 1) && (doc.max ?? 1) > 1) return setErrors((e) => ({ ...e, [doc.id]: t.tooMany.replace('{n}', String(doc.max)) }));
    setFiles((x) => ({ ...x, [doc.id]: (doc.max ?? 1) > 1 ? [...current, ...list] : list.slice(0, 1) }));
    setErrors((e) => Object.fromEntries(Object.entries(e).filter(([k]) => k !== doc.id)));
  };
  const remove = (doc: RequestedDocument, i: number) => setFiles((x) => ({ ...x, [doc.id]: (x[doc.id] ?? []).filter((_, j) => j !== i) }));
  return { files, setFiles, errors, setErrors, add, remove };
}

/** A real file input behind a button-like label, keyboard and screen readers included */
function PickButton({ id, doc, label, onFiles, variant = 'outline', describedBy }: { id: string; doc: RequestedDocument; label: string; onFiles: (f: File[]) => void; variant?: 'outline' | 'primary'; describedBy?: string }) {
  return (
    <label
      htmlFor={id}
      className={cn(
        'inline-flex h-11 shrink-0 cursor-pointer items-center justify-center gap-2 rounded-lg px-4 text-[13.5px] font-medium transition-[background-color,border-color,box-shadow] duration-200 has-[:focus-visible]:shadow-[0_0_0_3px_color-mix(in_oklab,var(--primary)_28%,transparent)] sm:h-9',
        variant === 'primary' ? 'bg-primary text-primary-foreground hover:bg-[color-mix(in_oklab,var(--primary)_88%,var(--background))]' : 'border border-border-strong bg-background text-foreground hover:bg-accent',
      )}
    >
      <input
        id={id}
        type="file"
        accept={doc.accept}
        multiple={(doc.max ?? 1) > 1}
        aria-describedby={describedBy}
        aria-invalid={describedBy ? true : undefined}
        onChange={(e) => {
          const list = Array.from(e.target.files ?? []);
          e.target.value = '';
          if (list.length) onFiles(list);
        }}
        className="sr-only"
      />
      <Icon name="upload" size={15} />
      {label}
    </label>
  );
}

function FileChip({ f, onRemove, t }: { f: File; onRemove: () => void; t: Texts }) {
  const locale = useLocale();
  return (
    <li className="kit-rise flex min-w-0 items-center gap-2.5 rounded-lg border border-border bg-background py-1.5 ps-3 pe-1">
      <Icon name="file-check" size={16} className="shrink-0 text-success" />
      <span className="min-w-0 flex-1 truncate text-[13px] text-foreground">{f.name}</span>
      <span className="shrink-0 text-[12px] tabular-nums text-muted-foreground">{fmtSize(f.size, locale)}</span>
      <button type="button" aria-label={t.remove.replace('{f}', f.name)} onClick={onRemove} className="grid size-9 shrink-0 place-items-center rounded-md text-muted-foreground transition-colors hover:bg-[color-mix(in_oklab,var(--foreground)_6%,transparent)] hover:text-foreground focus-visible:shadow-[0_0_0_2px_color-mix(in_oklab,var(--primary)_45%,transparent)] focus-visible:outline-none max-sm:size-11">
        <Icon name="x" size={15} />
      </button>
    </li>
  );
}

function Progress({ n, total, t }: { n: number; total: number; t: Texts }) {
  const share = total ? n / total : 0;
  const complete = n >= total;
  return (
    <div>
      <p aria-live="polite" className="flex items-baseline justify-between gap-3 text-[13px]">
        <span className={cn('font-medium', complete ? 'text-success-foreground' : 'text-foreground')}>{complete ? t.complete : t.done.replace('{n}', String(n)).replace('{total}', String(total))}</span>
      </p>
      <div className="mt-2 h-1.5 overflow-hidden rounded-full bg-[color-mix(in_oklab,var(--foreground)_10%,transparent)]">
        <div className={cn('h-full origin-left rounded-full transition-[transform,background-color] duration-700 ease-[var(--ease-kit)] motion-reduce:transition-none', complete ? 'bg-success' : 'bg-primary')} style={{ transform: `scaleX(${round(share, 3)})` }} />
      </div>
    </div>
  );
}

function Done({ p, t, onAgain, className }: { p: FileRequestProps; t: Texts; onAgain: () => void; className?: string }) {
  return (
    <div className={cn('kit-card mx-auto p-6 sm:p-10', className)}>
      <DonePanel
        title={p.done?.title ?? t.doneTitle}
        text={p.done?.text ?? t.doneText}
        steps={p.steps}
        actions={
          <Button variant="outline" iconLeft="plus" onClick={onAgain}>
            {t.again}
          </Button>
        }
      />
    </div>
  );
}

/** Checks required documents, returns the summary lines and focuses the first */
function useSubmit(p: FileRequestProps, t: Texts, fs: ReturnType<typeof useFiles>, prefix: string) {
  const [done, setDone] = useState(false);
  const summaryRef = useRef<HTMLDivElement>(null);
  const [summary, setSummary] = useState<FlowError[]>([]);
  const submit = (e: React.FormEvent) => {
    e.preventDefault();
    const missing = p.documents.filter((d) => !d.optional && !(fs.files[d.id]?.length) && d.status !== 'accepted' && d.status !== 'review');
    if (missing.length) {
      fs.setErrors((x) => ({ ...x, ...Object.fromEntries(missing.map((d) => [d.id, t.needed])) }));
      setSummary(missing.map((d) => ({ field: `${prefix}-${d.id}`, message: d.title })));
      requestAnimationFrame(() => summaryRef.current?.focus());
      return;
    }
    setSummary([]);
    p.onSubmit?.(fs.files);
    setDone(true);
  };
  return { done, setDone, summaryRef, summary, submit };
}

/* ------------------------------------------------------------------ */
/* checklist and portal rows                                           */
/* ------------------------------------------------------------------ */

function DocRow({ d, id, t, fs, showNote }: { d: RequestedDocument; id: string; t: Texts; fs: ReturnType<typeof useFiles>; showNote?: boolean }) {
  const list = fs.files[d.id] ?? [];
  const ready = list.length > 0;
  const err = fs.errors[d.id];
  return (
    <li className={cn('px-5 py-4 transition-colors duration-500 sm:px-6', ready && 'bg-[color-mix(in_oklab,var(--success)_4%,transparent)]')}>
      <div className="flex flex-col gap-3 sm:flex-row sm:items-center">
        <span className={cn('grid size-10 shrink-0 place-items-center rounded-xl border transition-[background-color,border-color,color] duration-500 max-sm:hidden', ready ? 'border-[color-mix(in_oklab,var(--success)_40%,var(--border))] bg-[color-mix(in_oklab,var(--success)_12%,var(--card))] text-success' : 'border-border bg-surface text-muted-foreground')}>
          <Icon name={ready ? 'check' : (d.icon ?? 'file')} size={18} strokeWidth={ready ? 2.2 : 1.6} />
        </span>
        <div className="min-w-0 flex-1">
          <p className="flex flex-wrap items-center gap-x-2 text-[15px] font-medium text-foreground">
            {d.title}
            {d.optional ? <span className="text-[12px] font-normal text-subtle-foreground">{t.optional}</span> : !ready && <span className="rounded-full bg-[color-mix(in_oklab,var(--foreground)_7%,transparent)] px-2 py-px text-[11.5px] font-normal text-muted-foreground">{t.missing}</span>}
          </p>
          {d.hint && <p className="mt-0.5 text-[13px] text-muted-foreground">{d.hint}</p>}
        </div>
        <PickButton id={`${id}-${d.id}`} doc={d} label={ready && (d.max ?? 1) === 1 ? t.replace : t.upload} onFiles={(f) => fs.add(d, f)} describedBy={err ? `${id}-${d.id}-err` : undefined} />
      </div>
      {showNote && d.note && (
        <p className="mt-3 flex gap-2.5 rounded-lg bg-surface px-3.5 py-2.5 text-[13px] leading-snug text-muted-foreground sm:ms-14">
          <Icon name="message-circle" size={15} className="mt-0.5 shrink-0" />
          <span>
            <span className="sr-only">{t.note}: </span>
            {d.note}
          </span>
        </p>
      )}
      {list.length > 0 && (
        <ul className="mt-3 grid gap-1.5 sm:ms-14">
          {list.map((f, i) => (
            <FileChip key={`${f.name}-${i}`} f={f} t={t} onRemove={() => fs.remove(d, i)} />
          ))}
        </ul>
      )}
      {err && (
        <p id={`${id}-${d.id}-err`} className="kit-rise mt-2.5 flex items-start gap-1.5 text-[13px] font-medium text-destructive sm:ms-14">
          <Icon name="alert-circle" size={15} strokeWidth={1.8} className="mt-[2.5px] shrink-0" />
          {err}
        </p>
      )}
    </li>
  );
}

function Checklist({ p, t }: { p: FileRequestProps; t: Texts }) {
  const id = useId();
  const fs = useFiles(p, t);
  const s = useSubmit(p, t, fs, id);
  const required = p.documents.filter((d) => !d.optional);
  const ready = required.filter((d) => fs.files[d.id]?.length).length;
  if (s.done) return <Done p={p} t={t} onAgain={() => (fs.setFiles({}), s.setDone(false))} className="max-w-[46rem]" />;
  return (
    <Reveal effect="rise" className="mx-auto max-w-[46rem]">
      <form noValidate onSubmit={s.submit} className="kit-card overflow-hidden">
        <div className="grid gap-5 border-b border-border px-5 py-5 sm:px-6">
          <Progress n={ready} total={required.length} t={t} />
          <ErrorSummary ref={s.summaryRef} errors={s.summary} />
        </div>
        <Stagger step={70} as="ul" className="divide-y divide-border">
          {p.documents.map((d) => (
            <DocRow key={d.id} d={d} id={id} t={t} fs={fs} />
          ))}
        </Stagger>
        <div className="flex flex-col gap-3 border-t border-border bg-surface px-5 py-4 sm:flex-row sm:items-center sm:justify-between sm:px-6">
          <p className="text-[13px] text-muted-foreground">{readable([...new Set(p.documents.flatMap((d) => (d.accept ?? '').split(',').map((x) => x.trim())).filter(Boolean))].join(','))} · {p.maxMb ?? 20} MB</p>
          <Button type="submit" icon="send" className="max-sm:w-full">
            {p.submitLabel ?? t.send}
          </Button>
        </div>
      </form>
    </Reveal>
  );
}

function Portal({ p, t }: { p: FileRequestProps; t: Texts }) {
  const id = useId();
  const fs = useFiles(p, t);
  const s = useSubmit(p, t, fs, id);
  const r = p.requester ?? { name: '' };
  const required = p.documents.filter((d) => !d.optional);
  const ready = required.filter((d) => fs.files[d.id]?.length).length;
  const initials = r.initials ?? r.name.split(' ').map((x) => x[0]).join('').slice(0, 2);
  if (s.done) return <Done p={p} t={t} onAgain={() => (fs.setFiles({}), s.setDone(false))} className="max-w-[48rem]" />;
  return (
    <div className="mx-auto grid max-w-[64rem] grid-cols-1 gap-6 lg:grid-cols-[18rem_minmax(0,1fr)] lg:gap-8">
      {/* Who asks, until when, how it is protected. A bar on phones, a column on desktop. */}
      <Reveal effect="rise" className="lg:sticky lg:top-24 lg:self-start">
        <aside className="rounded-2xl border border-border bg-surface p-5 sm:p-6">
          <div className="flex items-center gap-3">
            <span className="grid size-11 shrink-0 place-items-center rounded-xl bg-[color-mix(in_oklab,var(--primary)_16%,var(--card))] text-[14px] font-semibold text-[color-mix(in_oklab,var(--primary)_85%,var(--foreground))]">{initials}</span>
            <span className="min-w-0">
              <span className="block text-[12.5px] text-muted-foreground">{t.from.replace('{n}', r.name)}</span>
              {r.person && <span className="block truncate text-[15px] font-semibold text-foreground">{r.person}</span>}
            </span>
          </div>
          {r.message && <p className="mt-4 text-pretty text-[14px] leading-relaxed text-foreground">{r.message}</p>}
          <div className="mt-5 grid gap-3 border-t border-border pt-5 sm:grid-cols-2 lg:grid-cols-1">
            {r.deadline && (
              <p className="flex items-center gap-2.5 text-[13.5px] text-foreground">
                <Icon name="calendar" size={16} className="shrink-0 text-muted-foreground" />
                <span>
                  {t.due.replace('{d}', r.deadline)}
                  {r.daysLeft !== undefined && <span className={cn('ms-2 rounded-full px-2 py-px text-[12px] font-medium', r.daysLeft <= 3 ? 'bg-[color-mix(in_oklab,var(--warning)_16%,var(--card))] text-warning-foreground' : 'bg-[color-mix(in_oklab,var(--foreground)_7%,transparent)] text-muted-foreground')}>{t.daysLeft.replace('{n}', String(r.daysLeft))}</span>}
                </span>
              </p>
            )}
            <p className="flex items-center gap-2.5 text-[13.5px] text-muted-foreground">
              <Icon name="lock" size={16} className="shrink-0" />
              {t.secure.replace('{n}', r.name)}
            </p>
          </div>
          <div className="mt-5">
            <Progress n={ready} total={required.length} t={t} />
          </div>
        </aside>
      </Reveal>
      <Reveal effect="rise" delay={100} className="min-w-0">
        <form noValidate onSubmit={s.submit} className="kit-card overflow-hidden">
          {s.summary.length > 0 && (
            <div className="border-b border-border p-5 sm:p-6">
              <ErrorSummary ref={s.summaryRef} errors={s.summary} />
            </div>
          )}
          <Stagger step={70} as="ul" className="divide-y divide-border">
            {p.documents.map((d) => (
              <DocRow key={d.id} d={d} id={id} t={t} fs={fs} showNote />
            ))}
          </Stagger>
          <div className="flex justify-end border-t border-border bg-surface px-5 py-4 sm:px-6">
            <Button type="submit" icon="send" magnetic className="max-sm:w-full">
              {p.submitLabel ?? t.send}
            </Button>
          </div>
        </form>
      </Reveal>
    </div>
  );
}

/* ------------------------------------------------------------------ */
/* single-drop                                                         */
/* ------------------------------------------------------------------ */

function guess(f: File, docs: RequestedDocument[]) {
  const name = f.name.toLowerCase();
  return docs.find((d) => d.keywords?.some((k) => name.includes(k.toLowerCase())))?.id ?? '';
}

function SingleDrop({ p, t }: { p: FileRequestProps; t: Texts }) {
  const id = useId();
  const locale = useLocale();
  const [items, setItems] = useState<{ file: File; doc: string }[]>([]);
  const [over, setOver] = useState(false);
  const [error, setError] = useState('');
  const [done, setDone] = useState(false);
  const [summary, setSummary] = useState<FlowError[]>([]);
  const summaryRef = useRef<HTMLDivElement>(null);
  const max = (p.maxMb ?? 20) * 1e6;
  const required = p.documents.filter((d) => !d.optional);
  const ready = required.filter((d) => items.some((x) => x.doc === d.id)).length;
  const take = (list: File[]) => {
    const big = list.find((f) => f.size > max);
    if (big) setError(t.tooBig.replace('{f}', big.name).replace('{n}', String(p.maxMb ?? 20)));
    else setError('');
    setItems((x) => [...x, ...list.filter((f) => f.size <= max).map((file) => ({ file, doc: guess(file, p.documents) }))]);
  };
  if (done) return <Done p={p} t={t} onAgain={() => (setItems([]), setDone(false))} className="max-w-[48rem]" />;
  return (
    <form
      noValidate
      className="mx-auto grid max-w-[64rem] grid-cols-1 gap-6 lg:grid-cols-[minmax(0,1fr)_20rem] lg:gap-8"
      onSubmit={(e) => {
        e.preventDefault();
        const unsorted = items.map((x, i) => ({ ...x, i })).filter((x) => !x.doc);
        const missing = required.filter((d) => !items.some((x) => x.doc === d.id));
        const lines: FlowError[] = [...unsorted.map((x) => ({ field: `${id}-f${x.i}`, message: t.unsortedNeeded.replace('{f}', x.file.name) })), ...missing.map((d) => ({ field: `${id}-drop`, message: d.title }))];
        setSummary(lines);
        if (lines.length) {
          requestAnimationFrame(() => summaryRef.current?.focus());
          return;
        }
        const out: Record<string, File[]> = {};
        for (const x of items) (out[x.doc] ??= []).push(x.file);
        p.onSubmit?.(out);
        setDone(true);
      }}
    >
      <div className="grid min-w-0 gap-5">
        <ErrorSummary ref={summaryRef} errors={summary} />
        {/* One zone for everything, it lifts and lights up while files hover over it */}
        <Reveal effect="scale">
          <label
            htmlFor={`${id}-drop`}
            onDragOver={(e) => {
              e.preventDefault();
              setOver(true);
            }}
            onDragLeave={() => setOver(false)}
            onDrop={(e) => {
              e.preventDefault();
              setOver(false);
              take(Array.from(e.dataTransfer.files));
            }}
            className={cn(
              'flex cursor-pointer flex-col items-center justify-center rounded-2xl border-2 border-dashed px-6 py-12 text-center transition-[border-color,background-color,transform] duration-300 has-[:focus-visible]:shadow-[0_0_0_3px_color-mix(in_oklab,var(--primary)_28%,transparent)] sm:py-16',
              over ? 'scale-[1.01] border-primary bg-[color-mix(in_oklab,var(--primary)_7%,var(--card))]' : 'border-border-strong bg-card hover:border-[color-mix(in_oklab,var(--primary)_45%,var(--border-strong))]',
            )}
          >
            <input
              id={`${id}-drop`}
              type="file"
              multiple
              aria-invalid={summary.some((x) => x.field === `${id}-drop`) || undefined}
              onChange={(e) => {
                const list = Array.from(e.target.files ?? []);
                e.target.value = '';
                if (list.length) take(list);
              }}
              className="sr-only"
            />
            <span className={cn('grid size-14 place-items-center rounded-2xl bg-[color-mix(in_oklab,var(--primary)_14%,var(--card))] text-[color-mix(in_oklab,var(--primary)_85%,var(--foreground))] transition-transform duration-500 ease-[cubic-bezier(0.34,1.6,0.64,1)]', over && '-translate-y-1 scale-110')}>
              <Icon name="cloud-upload" size={26} />
            </span>
            <span className="mt-5 text-[17px] font-semibold text-foreground">{t.drop}</span>
            <span className="mt-1 text-[14px] text-muted-foreground">{t.dropOr}</span>
            <span className="mt-4 max-w-[26rem] text-pretty text-[12.5px] leading-snug text-subtle-foreground">{t.dropHint}</span>
          </label>
        </Reveal>
        {error && (
          <p role="alert" className="kit-rise flex items-start gap-1.5 text-[13px] font-medium text-destructive">
            <Icon name="alert-circle" size={15} strokeWidth={1.8} className="mt-[2.5px] shrink-0" />
            {error}
          </p>
        )}
        {items.length > 0 && (
          <ul className="grid gap-2">
            {items.map((x, i) => (
              <li key={`${x.file.name}-${i}`} className="kit-rise grid grid-cols-[auto_minmax(0,1fr)_auto] items-center gap-3 rounded-xl border border-border bg-card p-3 sm:grid-cols-[auto_minmax(0,1fr)_14rem_auto]">
                <Icon name={x.doc ? 'file-check' : 'file'} size={18} className={x.doc ? 'text-success' : 'text-muted-foreground'} />
                <span className="min-w-0">
                  <span className="block truncate text-[14px] text-foreground">{x.file.name}</span>
                  <span className="block text-[12px] tabular-nums text-muted-foreground">{fmtSize(x.file.size, locale)}</span>
                </span>
                <button type="button" aria-label={t.remove.replace('{f}', x.file.name)} onClick={() => setItems((y) => y.filter((_, j) => j !== i))} className="grid size-11 place-items-center rounded-lg text-muted-foreground transition-colors hover:bg-[color-mix(in_oklab,var(--foreground)_6%,transparent)] hover:text-foreground focus-visible:shadow-[0_0_0_3px_color-mix(in_oklab,var(--primary)_28%,transparent)] focus-visible:outline-none sm:order-last sm:size-9">
                  <Icon name="x" size={16} />
                </button>
                <NativeSelect
                  id={`${id}-f${i}`}
                  aria-label={`${x.file.name}, ${t.pickPlace}`}
                  size="sm"
                  placeholder={t.unsorted}
                  invalid={!x.doc && summary.length > 0}
                  options={p.documents.map((d) => ({ value: d.id, label: d.title }))}
                  value={x.doc}
                  onChange={(e) => setItems((y) => y.map((z, j) => (j === i ? { ...z, doc: e.target.value } : z)))}
                  className="col-span-3 sm:col-span-1"
                />
              </li>
            ))}
          </ul>
        )}
      </div>
      {/* The list fills itself as files are sorted */}
      <Reveal effect="rise" delay={120} className="lg:sticky lg:top-24 lg:self-start">
        <aside className="kit-card p-5 sm:p-6">
          <Progress n={ready} total={required.length} t={t} />
          <ul className="mt-5 grid gap-3">
            {p.documents.map((d) => {
              const n = items.filter((x) => x.doc === d.id).length;
              return (
                <li key={d.id} className="flex items-center gap-3 text-[14px]">
                  <span className={cn('grid size-6 shrink-0 place-items-center rounded-full border transition-[background-color,border-color,transform] duration-500 ease-[cubic-bezier(0.34,1.6,0.64,1)]', n ? 'scale-110 border-success bg-success text-background' : 'border-border-strong')}>
                    {n > 0 && <Icon name="check" size={13} strokeWidth={2.6} />}
                  </span>
                  <span className={cn('min-w-0 flex-1', n ? 'text-foreground' : 'text-muted-foreground')}>{d.title}</span>
                  {d.optional ? <span className="text-[12px] text-subtle-foreground">{t.optional}</span> : n > 1 ? <span className="text-[12px] tabular-nums text-muted-foreground">{n}</span> : null}
                </li>
              );
            })}
          </ul>
          <Button type="submit" icon="send" className="mt-6 w-full">
            {p.submitLabel ?? t.send}
          </Button>
        </aside>
      </Reveal>
    </form>
  );
}

/* ------------------------------------------------------------------ */
/* review-status                                                       */
/* ------------------------------------------------------------------ */

const STATUS: Record<NonNullable<RequestedDocument['status']>, { icon: IconName; tone: string; label: keyof Texts }> = {
  accepted: { icon: 'check-circle', tone: 'text-success-foreground bg-[color-mix(in_oklab,var(--success)_12%,var(--card))]', label: 'accepted' },
  review: { icon: 'hourglass', tone: 'text-foreground bg-[color-mix(in_oklab,var(--foreground)_7%,transparent)]', label: 'review' },
  rejected: { icon: 'alert-circle', tone: 'text-warning-foreground bg-[color-mix(in_oklab,var(--warning)_16%,var(--card))]', label: 'rejected' },
  missing: { icon: 'circle', tone: 'text-muted-foreground bg-[color-mix(in_oklab,var(--foreground)_6%,transparent)]', label: 'notYet' },
};

function ReviewStatus({ p, t }: { p: FileRequestProps; t: Texts }) {
  const id = useId();
  const fs = useFiles(p, t);
  const s = useSubmit(p, t, fs, id);
  const open = p.documents.filter((d) => d.status === 'rejected' || d.status === 'missing');
  const counts = (['accepted', 'review', 'rejected'] as const).map((k) => ({ k, n: p.documents.filter((d) => d.status === k).length }));
  if (s.done) return <Done p={p} t={t} onAgain={() => (fs.setFiles({}), s.setDone(false))} className="max-w-[48rem]" />;
  return (
    <Reveal effect="rise" className="mx-auto max-w-[50rem]">
      <form noValidate onSubmit={s.submit} className="kit-card overflow-hidden">
        {/* A stacked bar of the states, then the counts */}
        <div className="border-b border-border px-5 py-5 sm:px-6">
          <div aria-hidden className="flex h-2 gap-1 overflow-hidden rounded-full">
            {p.documents.map((d) => (
              <span key={d.id} className={cn('h-full flex-1 rounded-full transition-colors duration-500', d.status === 'accepted' ? 'bg-success' : d.status === 'review' ? 'bg-[color-mix(in_oklab,var(--foreground)_30%,transparent)]' : d.status === 'rejected' ? 'bg-warning' : 'bg-[color-mix(in_oklab,var(--foreground)_10%,transparent)]', fs.files[d.id]?.length && 'bg-primary')} />
            ))}
          </div>
          <p className="mt-3 flex flex-wrap gap-x-5 gap-y-1 text-[13px] text-muted-foreground">
            {counts
              .filter((c) => c.n)
              .map((c) => (
                <span key={c.k} className="tabular-nums">
                  <span className="font-semibold text-foreground">{c.n}</span> {t[STATUS[c.k].label]}
                </span>
              ))}
          </p>
          {s.summary.length > 0 && <ErrorSummary ref={s.summaryRef} errors={s.summary} className="mt-4" />}
        </div>
        <Stagger step={70} as="ul" className="divide-y divide-border">
          {p.documents.map((d) => {
            const st = STATUS[d.status ?? 'missing'];
            const fresh = fs.files[d.id] ?? [];
            const canSend = d.status === 'rejected' || d.status === 'missing';
            return (
              <li key={d.id} className="px-5 py-4 sm:px-6">
                <div className="flex flex-col gap-3 sm:flex-row sm:items-center">
                  <div className="min-w-0 flex-1">
                    <p className="text-[15px] font-medium text-foreground">{d.title}</p>
                    {d.file && <p className="mt-0.5 truncate text-[13px] text-muted-foreground">{d.file}</p>}
                  </div>
                  <span className={cn('inline-flex h-7 shrink-0 items-center gap-1.5 self-start rounded-full px-2.5 text-[12.5px] font-medium sm:self-center', fresh.length ? 'bg-[color-mix(in_oklab,var(--primary)_14%,var(--card))] text-foreground' : st.tone)}>
                    <Icon name={fresh.length ? 'upload' : st.icon} size={14} />
                    {fresh.length ? t.review : t[st.label]}
                  </span>
                  {canSend && <PickButton id={`${id}-${d.id}`} doc={d} label={d.status === 'rejected' ? t.newVersion : t.choose} onFiles={(f) => fs.add(d, f)} variant={d.status === 'rejected' && !fresh.length ? 'primary' : 'outline'} describedBy={d.reason ? `${id}-${d.id}-why` : undefined} />}
                </div>
                {d.status === 'rejected' && d.reason && !fresh.length && (
                  <p id={`${id}-${d.id}-why`} className="kit-rise mt-3 flex gap-2.5 rounded-lg bg-[color-mix(in_oklab,var(--warning)_16%,var(--card))] px-3.5 py-2.5 text-[13.5px] leading-snug text-warning-foreground">
                    <Icon name="info" size={16} className="mt-px shrink-0" />
                    {d.reason}
                  </p>
                )}
                {fresh.length > 0 && (
                  <ul className="mt-3 grid gap-1.5">
                    {fresh.map((f, i) => (
                      <FileChip key={`${f.name}-${i}`} f={f} t={t} onRemove={() => fs.remove(d, i)} />
                    ))}
                  </ul>
                )}
                {fs.errors[d.id] && (
                  <p className="kit-rise mt-2.5 flex items-start gap-1.5 text-[13px] font-medium text-destructive">
                    <Icon name="alert-circle" size={15} strokeWidth={1.8} className="mt-[2.5px] shrink-0" />
                    {fs.errors[d.id]}
                  </p>
                )}
              </li>
            );
          })}
        </Stagger>
        {open.length > 0 && (
          <div className="flex justify-end border-t border-border bg-surface px-5 py-4 sm:px-6">
            <Button type="submit" icon="send" className="max-sm:w-full">
              {p.submitLabel ?? t.sendUpdates}
            </Button>
          </div>
        )}
      </form>
    </Reveal>
  );
}

/* ------------------------------------------------------------------ */
/* Section                                                             */
/* ------------------------------------------------------------------ */

/**
 * Collect documents.
 *   <FileRequest variant="checklist" documents={[{ id, title, hint, accept: '.pdf', max: 1 }]} onSubmit={(files) => …} />
 */
export function FileRequest(props: FileRequestProps) {
  const { variant = 'checklist', eyebrow, title, description, labels, className } = props;
  const t = useTexts(TEXTS, labels);
  return (
    <Section className={className}>
      <FlowHead eyebrow={eyebrow} title={title} description={description} align="center" className="mb-10 sm:mb-14" />
      {variant === 'checklist' && <Checklist p={props} t={t} />}
      {variant === 'single-drop' && <SingleDrop p={props} t={t} />}
      {variant === 'portal' && <Portal p={props} t={t} />}
      {variant === 'review-status' && <ReviewStatus p={props} t={t} />}
    </Section>
  );
}