Gift cards

'use client';

import { useId, useRef, useState } from 'react';
import { cn, round, useLocale, useTexts } from '@/lib/kit';
import { Button } from '@/components/ui/button';
import { Icon } from '@/components/ui/icon';
import { Reveal } from '@/components/ui/reveal';
import { Stagger } from '@/components/ui/motion';
import { Eyebrow, Section } from '@/components/ui/section';
import { ShopMotion, Swap, TweenPrice, formatPrice } from '@/components/ui/product-image';

/*
 * Gift cards: design and send one, buy a ready one, check a balance and
 * redeem a code at checkout.
 *
 *   designer  pick a design, an amount, a message and a date, the card writes along
 *   amounts   ready cards by amount and occasion as a row of cards that tilt toward the pointer
 *   balance   enter the code, see what is left and where it was spent
 *   redeem    the field in the cart: apply a code, the total counts down
 *
 * The card motifs are drawn. Pass `designs` with your own artwork to replace them.
 */

export type GiftCardsVariant = 'designer' | 'amounts' | 'balance' | 'redeem';
export type GiftMotif = 'waves' | 'sun' | 'leaves' | 'confetti' | 'stars' | 'plain';

export interface GiftDesign {
  id: string;
  name: string;
  motif?: GiftMotif;
  /** Two colors for the card, any CSS color */
  from: string;
  to: string;
  /** Text on the card is dark (light designs) */
  dark?: boolean;
  /** Your own artwork instead of the drawn motif */
  art?: React.ReactNode;
}

export interface GiftOffer {
  id: string;
  amount: number;
  /** e.g. "Birthday" */
  occasion?: string;
  designId?: string;
  note?: string;
  href?: string;
}

export interface GiftCardsProps {
  variant?: GiftCardsVariant;
  eyebrow?: string;
  title?: string;
  description?: string;
  /** The shop name printed on the card */
  brand?: string;
  designs?: GiftDesign[];
  amounts?: number[];
  /** designer: lowest and highest free amount */
  range?: [number, number];
  offers?: GiftOffer[];
  /** balance: what the demo code shows */
  balance?: { code: string; amount: number; initial: number; expires?: string; history?: { date: string; text: string; amount: number }[] };
  /** balance: show the result right away (previews) */
  defaultChecked?: boolean;
  /** redeem: the cart total and a code that works */
  cart?: { subtotal: number; shipping?: number; validCode: string; codeValue: number };
  /** redeem: a code already in the field, e.g. from a link */
  defaultCode?: string;
  currency?: string;
  /** designer: start values, e.g. from a "Gift this" button */
  defaultValues?: { to?: string; from?: string; message?: string; amount?: number; designId?: string };
  onBuy?: (card: { designId: string; amount: number; to: string; from: string; message: string; date: string }) => void;
  labels?: Partial<Texts>;
  className?: string;
}

const TEXTS = {
  en: {
    giftCard: 'Gift card',
    design: 'Design',
    amount: 'Amount',
    other: 'Other amount',
    between: 'Any amount from',
    and: 'to',
    fillIn: 'Fill in name, email and your name so the card can go out.',
    to: 'For',
    toPlaceholder: 'Their name',
    toEmail: 'Their email',
    from: 'From',
    fromPlaceholder: 'Your name',
    message: 'Message',
    messagePlaceholder: 'A few words for the card',
    sendOn: 'Send on',
    today: 'Right away',
    later: 'On a date',
    buy: 'Add gift card to cart',
    added: 'Gift card in your cart',
    validFor: 'Valid for three years, for everything in the shop and in our stores.',
    choose: 'Add to cart',
    chosen: 'In your cart',
    code: 'Gift card code',
    codePlaceholder: 'XXXX XXXX XXXX',
    check: 'Check balance',
    checking: 'Checking',
    left: 'left',
    of: 'of',
    expires: 'Valid until',
    spent: 'Spent',
    checkAnother: 'Check another card',
    notFound: 'This code is not known. It has 12 characters and stands under the scratch field.',
    haveCard: 'Have a gift card?',
    apply: 'Apply',
    applied: 'Gift card applied',
    remove: 'Remove gift card',
    wrongCode: 'This code does not work. Check the spelling, it has 12 characters.',
    subtotal: 'Subtotal',
    shipping: 'Shipping',
    free: 'Free',
    total: 'Total',
    stillOnCard: 'stays on your card',
    pay: 'Continue to payment',
  },
  de: {
    giftCard: 'Gutschein',
    design: 'Motiv',
    amount: 'Betrag',
    other: 'Anderer Betrag',
    between: 'Jeder Betrag von',
    and: 'bis',
    fillIn: 'Trag Name, E-Mail und deinen Namen ein, damit die Karte rausgehen kann.',
    to: 'Für',
    toPlaceholder: 'Name der beschenkten Person',
    toEmail: 'E-Mail der beschenkten Person',
    from: 'Von',
    fromPlaceholder: 'Dein Name',
    message: 'Nachricht',
    messagePlaceholder: 'Ein paar Worte für die Karte',
    sendOn: 'Senden am',
    today: 'Sofort',
    later: 'An einem Datum',
    buy: 'Gutschein in den Warenkorb',
    added: 'Gutschein im Warenkorb',
    validFor: 'Drei Jahre gültig, für alles im Shop und in unseren Läden.',
    choose: 'In den Warenkorb',
    chosen: 'Im Warenkorb',
    code: 'Gutscheincode',
    codePlaceholder: 'XXXX XXXX XXXX',
    check: 'Guthaben prüfen',
    checking: 'Wird geprüft',
    left: 'übrig',
    of: 'von',
    expires: 'Gültig bis',
    spent: 'Eingelöst',
    checkAnother: 'Anderen Gutschein prüfen',
    notFound: 'Diesen Code kennen wir nicht. Er hat 12 Zeichen und steht unter dem Rubbelfeld.',
    haveCard: 'Hast du einen Gutschein?',
    apply: 'Einlösen',
    applied: 'Gutschein eingelöst',
    remove: 'Gutschein entfernen',
    wrongCode: 'Dieser Code passt nicht. Prüf die Schreibweise, er hat 12 Zeichen.',
    subtotal: 'Zwischensumme',
    shipping: 'Versand',
    free: 'Kostenlos',
    total: 'Gesamt',
    stillOnCard: 'bleiben auf deinem Gutschein',
    pay: 'Weiter zur Zahlung',
  },
};

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

const FOCUS = 'outline-none focus-visible:outline-solid focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-[var(--ring)]';
const CARD = 'rounded-2xl border border-border bg-card shadow-[var(--highlight),var(--shadow-sm)]';
const FIELD = 'h-11 w-full rounded-lg border border-input bg-background px-3.5 text-[15px] text-foreground shadow-[var(--shadow-sm)] outline-none transition-[border-color,box-shadow] placeholder:text-subtle-foreground hover:border-border-strong focus:border-border-strong focus:shadow-[0_0_0_3px_color-mix(in_oklab,var(--ring)_22%,transparent)]';

function Head({ eyebrow, title, description, center }: { eyebrow?: string; title?: string; description?: string; center?: boolean }) {
  if (!title) return null;
  return (
    <div className={cn('mb-10 max-w-[40rem] sm:mb-12', center && 'mx-auto text-center')}>
      {eyebrow && <Eyebrow>{eyebrow}</Eyebrow>}
      <h2 className="kit-rise text-balance text-h2 font-semibold text-foreground">{title}</h2>
      {description && (
        <p className={cn('kit-rise mt-4 max-w-[34rem] text-pretty text-lead text-muted-foreground', center && 'mx-auto')} style={{ '--kit-delay': '80ms' } as React.CSSProperties}>
          {description}
        </p>
      )}
    </div>
  );
}

/* ------------------------------------------------------------------ */
/* The drawn card                                                      */
/* ------------------------------------------------------------------ */

function Motif({ motif = 'plain' }: { motif?: GiftMotif }) {
  const stroke = { fill: 'none', stroke: 'currentColor', strokeWidth: 2, strokeLinecap: 'round' as const, vectorEffect: 'non-scaling-stroke' as const };
  return (
    <svg viewBox="0 0 320 200" preserveAspectRatio="xMidYMid slice" className="absolute inset-0 size-full opacity-30" aria-hidden data-clip-ok>
      {motif === 'waves' && [0, 1, 2, 3, 4, 5].map((i) => <path key={i} d={`M-10 ${70 + i * 22} C 60 ${50 + i * 22}, 120 ${95 + i * 22}, 190 ${70 + i * 22} S 300 ${50 + i * 22}, 340 ${72 + i * 22}`} {...stroke} />)}
      {motif === 'sun' && (
        <g>
          <circle cx="250" cy="70" r="42" fill="currentColor" opacity="0.5" />
          {Array.from({ length: 12 }, (_, i) => {
            const a = (i / 12) * Math.PI * 2;
            return <path key={i} d={`M${round(250 + Math.cos(a) * 56)} ${round(70 + Math.sin(a) * 56)} L${round(250 + Math.cos(a) * 74)} ${round(70 + Math.sin(a) * 74)}`} {...stroke} />;
          })}
          <path d="M-10 170 C 80 140, 200 190, 340 150" {...stroke} />
        </g>
      )}
      {motif === 'leaves' &&
        [
          [60, 160, -30],
          [130, 40, 20],
          [250, 140, -10],
          [290, 30, 40],
          [20, 50, 60],
          [190, 190, 0],
        ].map(([x, y, r], i) => (
          <g key={i} transform={`translate(${x} ${y}) rotate(${r})`}>
            <path d="M0 -34 C 22 -18, 22 18, 0 34 C -22 18, -22 -18, 0 -34 Z" fill="currentColor" opacity="0.35" />
            <path d="M0 -30 V 30" {...stroke} />
          </g>
        ))}
      {motif === 'confetti' &&
        Array.from({ length: 26 }, (_, i) => {
          const x = round((i * 73) % 320);
          const y = round((i * 47 + (i % 3) * 31) % 200);
          return i % 3 === 0 ? <circle key={i} cx={x} cy={y} r="4" fill="currentColor" /> : <rect key={i} x={x} y={y} width="10" height="4" rx="2" fill="currentColor" transform={`rotate(${(i * 37) % 180} ${x + 5} ${y + 2})`} />;
        })}
      {motif === 'stars' &&
        Array.from({ length: 14 }, (_, i) => {
          const x = round((i * 61 + 20) % 300);
          const y = round((i * 43 + 15) % 190);
          const s = 4 + (i % 3) * 3;
          return <path key={i} d={`M${x} ${y - s} L${x + s * 0.3} ${y - s * 0.3} L${x + s} ${y} L${x + s * 0.3} ${y + s * 0.3} L${x} ${y + s} L${x - s * 0.3} ${y + s * 0.3} L${x - s} ${y} L${x - s * 0.3} ${y - s * 0.3} Z`} fill="currentColor" />;
        })}
    </svg>
  );
}

function GiftCard({ design, amount, brand, to, message, className, live }: { design: GiftDesign; amount?: number; brand?: string; to?: string; message?: string; className?: string; live?: boolean }) {
  const locale = useLocale();
  const t = useTexts(TEXTS);
  return (
    <div
      className={cn('relative aspect-[1.6] w-full overflow-hidden rounded-2xl p-5 shadow-[0_24px_48px_-24px_rgb(0_0_0/0.6),inset_0_1px_0_rgb(255_255_255/0.3)] sm:p-6', design.dark ? 'text-[oklch(0.24_0.02_60)]' : 'text-white', className)}
      style={{ background: `linear-gradient(135deg, ${design.from}, ${design.to})` }}
    >
      {design.art ? <div className="absolute inset-0 [&>*]:size-full [&>*]:object-cover">{design.art}</div> : <Motif motif={design.motif} />}
      {/* A soft shade under the text, so name, message and amount read on any motif */}
      <div aria-hidden className={cn('absolute inset-x-0 bottom-0 h-3/5', design.dark ? 'bg-[linear-gradient(to_top,rgb(255_255_255/0.35),transparent)]' : 'bg-[linear-gradient(to_top,rgb(0_0_0/0.32),transparent)]')} />
      <div aria-hidden className="absolute inset-0 bg-[linear-gradient(115deg,transparent_30%,rgb(255_255_255/0.22)_45%,transparent_60%)] bg-[length:250%_100%] bg-[position:120%_0] transition-[background-position] duration-[1200ms] ease-[var(--ease-kit)] group-hover/gc:bg-[position:-30%_0]" />
      <div className="relative flex h-full flex-col">
        <div className="flex items-start justify-between gap-3">
          <span className="text-[13px] font-semibold uppercase tracking-[0.12em] opacity-90">{brand}</span>
          <span className="text-[12px] font-medium opacity-80">{t.giftCard}</span>
        </div>
        <div className="mt-auto">
          {(to || message) && (
            <p className={cn('mb-2 line-clamp-2 max-w-[85%] text-pretty text-[13px] leading-snug opacity-90', live && 'transition-opacity')}>
              {to && <span className="font-semibold">{to}</span>}
              {to && message && ' · '}
              {message}
            </p>
          )}
          {amount !== undefined && (
            <Swap value={amount}>
              <span className="text-[34px] font-semibold leading-none tracking-[-0.03em] tabular-nums sm:text-[40px]">{formatPrice(locale, amount).replace(/[.,]00(?=\s|$| )/, '')}</span>
            </Swap>
          )}
        </div>
      </div>
    </div>
  );
}

/** Tilts its child toward a mouse pointer, flat on touch and with reduced motion */
function Tilt({ children, className }: { children: React.ReactNode; className?: string }) {
  const ref = useRef<HTMLDivElement>(null);
  return (
    <div
      ref={ref}
      className={cn('transition-transform duration-500 ease-[var(--ease-kit)] [transform-style:preserve-3d] motion-reduce:!transform-none', className)}
      onPointerMove={(e) => {
        const el = ref.current;
        if (!el || e.pointerType !== 'mouse') return;
        const r = el.getBoundingClientRect();
        const x = (e.clientX - r.left) / r.width - 0.5;
        const y = (e.clientY - r.top) / r.height - 0.5;
        el.style.transform = `perspective(900px) rotateY(${(x * 10).toFixed(2)}deg) rotateX(${(-y * 10).toFixed(2)}deg) translateY(-4px)`;
      }}
      onPointerLeave={() => {
        if (ref.current) ref.current.style.transform = '';
      }}
    >
      {children}
    </div>
  );
}

/* ------------------------------------------------------------------ */
/* designer                                                            */
/* ------------------------------------------------------------------ */

function Designer(p: GiftCardsProps & { t: Texts }) {
  const { t, currency } = p;
  const locale = useLocale();
  const designs = p.designs ?? [];
  const amounts = p.amounts ?? [25, 50, 100];
  const [lo, hi] = p.range ?? [10, 500];
  const dv = p.defaultValues ?? {};
  const [designId, setDesignId] = useState(dv.designId ?? designs[0]?.id ?? '');
  const [amount, setAmount] = useState(dv.amount ?? amounts[1] ?? amounts[0] ?? 50);
  const [custom, setCustom] = useState('');
  const [to, setTo] = useState(dv.to ?? '');
  const [email, setEmail] = useState('');
  const [from, setFrom] = useState(dv.from ?? '');
  const [message, setMessage] = useState(dv.message ?? '');
  const [tried, setTried] = useState(false);
  const [when, setWhen] = useState<'now' | 'later'>('now');
  const [date, setDate] = useState('');
  const [added, setAdded] = useState(false);
  const id = useId();
  const design = designs.find((d) => d.id === designId) ?? designs[0];
  const customValue = Number(custom.replace(',', '.'));
  const customOk = custom === '' || (customValue >= lo && customValue <= hi);
  const shown = custom && customOk ? customValue : amount;
  const valid = to.trim() && /\S+@\S+\.\S+/.test(email) && from.trim() && customOk && (when === 'now' || date);
  return (
    <Section className={p.className}>
      <ShopMotion />
      <Head eyebrow={p.eyebrow} title={p.title} description={p.description} />
      <div className="grid grid-cols-1 gap-10 lg:grid-cols-[minmax(0,1fr)_minmax(0,1.05fr)] lg:gap-16">
        <div className="mx-auto w-full max-w-[30rem] lg:sticky lg:top-8 lg:max-w-none lg:self-start">
          {design && (
            <Reveal effect="scale">
              <Tilt className="group/gc">
                <div key={design.id} className="animate-[kitshop-zoom_0.5s_var(--ease-kit)]">
                  <GiftCard design={design} amount={shown} brand={p.brand} to={to} message={message} live />
                </div>
              </Tilt>
            </Reveal>
          )}
          <p className="mt-5 flex items-start gap-2 text-[13.5px] text-muted-foreground">
            <Icon name="shield" size={15} className="mt-0.5 shrink-0" />
            {t.validFor}
          </p>
        </div>

        <form
          className="space-y-7"
          onSubmit={(e) => {
            e.preventDefault();
            setTried(true);
            if (!valid || !design) {
              const first = !to.trim() ? `${id}-to` : !/S+@S+.S+/.test(email) ? `${id}-em` : !from.trim() ? `${id}-from` : null;
              if (first) document.getElementById(first)?.focus();
              return;
            }
            setAdded(true);
            p.onBuy?.({ designId: design.id, amount: shown, to, from, message, date: when === 'now' ? '' : date });
          }}
        >
          <fieldset>
            <legend className="mb-3 text-[14px] font-medium text-foreground">{t.design}</legend>
            <div role="radiogroup" aria-label={t.design} className="grid grid-cols-5 gap-1.5 sm:gap-2">
              {designs.map((d) => (
                <label key={d.id} className={cn('group/d relative cursor-pointer rounded-xl p-1 transition-shadow has-[:focus-visible]:outline-2 has-[:focus-visible]:outline-offset-2 has-[:focus-visible]:outline-[var(--ring)]', d.id === designId ? 'shadow-[0_0_0_2px_var(--foreground)]' : 'hover:shadow-[0_0_0_1px_var(--border-strong)]')}>
                  <input type="radio" name={`${id}-d`} checked={d.id === designId} onChange={() => setDesignId(d.id)} className="sr-only" />
                  <span className="relative block aspect-[1.6] overflow-hidden rounded-lg transition-transform duration-300 group-hover/d:scale-[1.03]" style={{ background: `linear-gradient(135deg, ${d.from}, ${d.to})` }}>
                    <span className={cn('absolute inset-0', d.dark ? 'text-[oklch(0.24_0.02_60)]' : 'text-white')}>{d.art ?? <Motif motif={d.motif} />}</span>
                  </span>
                  <span className="mt-1.5 block truncate text-center text-[11.5px] text-muted-foreground sm:text-[12px]">{d.name}</span>
                </label>
              ))}
            </div>
          </fieldset>

          <fieldset>
            <legend className="mb-3 text-[14px] font-medium text-foreground">{t.amount}</legend>
            <div className="grid grid-cols-3 gap-2 sm:grid-cols-[repeat(3,minmax(0,1fr))_minmax(0,1.3fr)]">
              {amounts.map((a) => {
                const on = !custom && a === amount;
                return (
                  <label key={a} className={cn('grid h-12 cursor-pointer place-items-center rounded-lg border text-[15px] font-semibold tabular-nums transition-colors has-[:focus-visible]:outline-2 has-[:focus-visible]:outline-offset-2 has-[:focus-visible]:outline-[var(--ring)]', on ? 'border-foreground bg-foreground text-background' : 'border-border-strong bg-background text-foreground hover:bg-accent')}>
                    <input type="radio" name={`${id}-a`} checked={on} onChange={() => { setAmount(a); setCustom(''); }} className="sr-only" />
                    {formatPrice(locale, a, currency).replace(/[.,]00(?=\s|$| )/, '')}
                  </label>
                );
              })}
              <div className="col-span-3 sm:col-span-1">
                <label htmlFor={`${id}-c`} className="sr-only">
                  {t.other}
                </label>
                <span className="relative block">
                <input
                  id={`${id}-c`}
                  value={custom}
                  onChange={(e) => setCustom(e.target.value.replace(/[^\d,.]/g, ''))}
                  inputMode="decimal"
                  placeholder={t.other}
                  aria-invalid={!customOk || undefined}
                  aria-describedby={`${id}-ch`}
                  className={cn(FIELD, 'h-12 pe-9 tabular-nums', custom && customOk && 'border-foreground', !customOk && 'border-destructive')}
                />
                {custom && <span aria-hidden className="pointer-events-none absolute end-3.5 top-1/2 -translate-y-1/2 text-[14px] text-muted-foreground">{currency === 'USD' ? '$' : '€'}</span>}
                </span>
              </div>
            </div>
            <p id={`${id}-ch`} className={cn('mt-2 text-[12.5px]', customOk ? 'text-muted-foreground' : 'text-destructive')}>
              {t.between} {formatPrice(locale, lo, currency).replace(/[.,]00(?=\s|$| )/, '')} {t.and} {formatPrice(locale, hi, currency).replace(/[.,]00(?=\s|$| )/, '')}
            </p>
          </fieldset>

          <div className="grid grid-cols-1 gap-4 sm:grid-cols-2">
            <div>
              <label htmlFor={`${id}-to`} className="mb-1.5 block text-[13.5px] font-medium text-foreground">
                {t.to}
              </label>
              <input id={`${id}-to`} value={to} onChange={(e) => setTo(e.target.value)} placeholder={t.toPlaceholder} maxLength={30} aria-invalid={(tried && !to.trim()) || undefined} className={cn(FIELD, tried && !to.trim() && 'border-destructive')} />
            </div>
            <div>
              <label htmlFor={`${id}-em`} className="mb-1.5 block text-[13.5px] font-medium text-foreground">
                {t.toEmail}
              </label>
              <input id={`${id}-em`} type="email" value={email} onChange={(e) => setEmail(e.target.value)} aria-invalid={(tried && !/S+@S+.S+/.test(email)) || undefined} className={cn(FIELD, tried && !/S+@S+.S+/.test(email) && 'border-destructive')} />
            </div>
            <div className="sm:col-span-2">
              <label htmlFor={`${id}-msg`} className="mb-1.5 flex items-baseline justify-between text-[13.5px] font-medium text-foreground">
                {t.message}
                <span className="text-[12px] font-normal tabular-nums text-muted-foreground">{message.length} / 140</span>
              </label>
              <textarea id={`${id}-msg`} value={message} onChange={(e) => setMessage(e.target.value.slice(0, 140))} rows={3} placeholder={t.messagePlaceholder} className={cn(FIELD, 'h-auto resize-none py-3 leading-relaxed')} />
            </div>
            <div>
              <label htmlFor={`${id}-from`} className="mb-1.5 block text-[13.5px] font-medium text-foreground">
                {t.from}
              </label>
              <input id={`${id}-from`} value={from} onChange={(e) => setFrom(e.target.value)} placeholder={t.fromPlaceholder} aria-invalid={(tried && !from.trim()) || undefined} className={cn(FIELD, tried && !from.trim() && 'border-destructive')} />
            </div>
            <fieldset>
              <legend className="mb-1.5 text-[13.5px] font-medium text-foreground">{t.sendOn}</legend>
              <div className="relative grid h-11 grid-cols-2 rounded-lg border border-border-strong bg-surface p-1">
                <span aria-hidden className="absolute inset-y-1 left-1 w-[calc(50%-0.25rem)] rounded-md bg-background shadow-[var(--highlight),var(--shadow-sm)] transition-transform duration-300 ease-[var(--ease-kit)]" style={{ transform: `translateX(${when === 'later' ? 100 : 0}%)` }} />
                {(['now', 'later'] as const).map((w) => (
                  <label key={w} className={cn('relative z-10 grid cursor-pointer place-items-center after:absolute after:inset-x-0 after:-inset-y-[5px] after:content-[""] rounded-md text-[13.5px] font-medium transition-colors has-[:focus-visible]:outline-2 has-[:focus-visible]:outline-[var(--ring)]', when === w ? 'text-foreground' : 'text-muted-foreground')}>
                    <input type="radio" name={`${id}-w`} checked={when === w} onChange={() => setWhen(w)} className="sr-only" />
                    {w === 'now' ? t.today : t.later}
                  </label>
                ))}
              </div>
            </fieldset>
            {when === 'later' && (
              <div className="animate-[kitshop-in_0.35s_var(--ease-kit)] sm:col-span-2">
                <label htmlFor={`${id}-date`} className="sr-only">
                  {t.sendOn}
                </label>
                <input id={`${id}-date`} type="date" value={date} onChange={(e) => setDate(e.target.value)} className={FIELD} />
              </div>
            )}
          </div>

          {tried && !valid && (
            <p role="alert" className="flex items-start gap-2 text-[13.5px] text-destructive">
              <Icon name="alert-circle" size={15} className="mt-0.5 shrink-0" />
              {t.fillIn}
            </p>
          )}
          <div className="flex flex-col gap-3 border-t border-border pt-6 sm:flex-row sm:items-center sm:justify-between">
            <TweenPrice value={shown} currency={currency} className="text-[26px] font-semibold tracking-[-0.02em] text-foreground" />
            <Button type="submit" size="lg" disabled={added} iconLeft={added ? 'check' : 'gift'}>
              <Swap value={added}>{added ? t.added : t.buy}</Swap>
            </Button>
          </div>
        </form>
      </div>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* amounts                                                             */
/* ------------------------------------------------------------------ */

function Amounts(p: GiftCardsProps & { t: Texts }) {
  const { t, currency } = p;
  const locale = useLocale();
  const designs = p.designs ?? [];
  const offers = p.offers ?? [];
  const [picked, setPicked] = useState<Record<string, boolean>>({});
  return (
    <Section className={p.className}>
      <ShopMotion />
      <Head eyebrow={p.eyebrow} title={p.title} description={p.description} center />
      <Stagger step={90} as="ul" className="grid grid-cols-1 gap-6 sm:grid-cols-2 lg:grid-cols-4">
        {offers.map((o, i) => {
          const d = designs.find((x) => x.id === o.designId) ?? designs[i % Math.max(1, designs.length)];
          const on = !!picked[o.id];
          return (
            <li key={o.id} className="flex flex-col">
              {d && (
                <Tilt className="group/gc">
                  <GiftCard design={d} amount={o.amount} brand={p.brand} />
                </Tilt>
              )}
              <div className="mt-4 flex flex-1 flex-col px-1">
                <div className="flex items-baseline justify-between gap-3">
                  <h3 className="text-[16px] font-semibold text-foreground">{o.occasion ?? d?.name}</h3>
                  <span className="text-[15px] font-semibold tabular-nums text-foreground">{formatPrice(locale, o.amount, currency)}</span>
                </div>
                {o.note && <p className="mt-1 text-pretty text-[13.5px] leading-relaxed text-muted-foreground">{o.note}</p>}
                <div className="mt-auto pt-4">
                  <Button variant={on ? 'secondary' : 'outline'} className="w-full" iconLeft={on ? 'check' : 'gift'} aria-pressed={on} onClick={() => setPicked((x) => ({ ...x, [o.id]: !on }))}>
                    <Swap value={on}>{on ? t.chosen : t.choose}</Swap>
                  </Button>
                </div>
              </div>
            </li>
          );
        })}
      </Stagger>
      <p className="mt-10 text-center text-[13.5px] text-muted-foreground">{t.validFor}</p>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* balance                                                             */
/* ------------------------------------------------------------------ */

const formatCode = (v: string) => v.replace(/[^a-z0-9]/gi, '').toUpperCase().slice(0, 12).replace(/(.{4})(?=.)/g, '$1 ');

function Balance(p: GiftCardsProps & { t: Texts }) {
  const { t, currency } = p;
  const locale = useLocale();
  const bal = p.balance;
  const [code, setCode] = useState(p.defaultChecked && bal ? formatCode(bal.code) : '');
  const [state, setState] = useState<'idle' | 'checking' | 'done' | 'wrong'>(p.defaultChecked ? 'done' : 'idle');
  const [shake, setShake] = useState(0);
  const id = useId();
  const share = bal ? Math.max(0, Math.min(1, bal.amount / Math.max(1, bal.initial))) : 0;
  const ring = round(2 * Math.PI * 54);
  const check = (e: React.FormEvent) => {
    e.preventDefault();
    setState('checking');
    window.setTimeout(() => {
      const ok = !!bal && code.replace(/\s/g, '') === bal.code.replace(/\s/g, '').toUpperCase();
      setState(ok ? 'done' : 'wrong');
      if (!ok) setShake((s) => s + 1);
    }, 700);
  };
  return (
    <Section className={p.className}>
      <ShopMotion />
      <div className={cn(CARD, 'mx-auto grid max-w-[56rem] grid-cols-1 overflow-hidden md:grid-cols-2')}>
        <form onSubmit={check} className="flex flex-col p-6 sm:p-8" key={`f${shake}`}>
          {p.eyebrow && <Eyebrow>{p.eyebrow}</Eyebrow>}
          <h2 className="text-balance text-h3 font-semibold text-foreground">{p.title}</h2>
          {p.description && <p className="mt-3 text-pretty text-[15px] leading-relaxed text-muted-foreground">{p.description}</p>}
          <label htmlFor={id} className="mb-1.5 mt-7 block text-[13.5px] font-medium text-foreground">
            {t.code}
          </label>
          <input
            id={id}
            value={code}
            onChange={(e) => { setCode(formatCode(e.target.value)); if (state !== 'checking') setState('idle'); }}
            placeholder={t.codePlaceholder}
            autoComplete="off"
            spellCheck={false}
            aria-invalid={state === 'wrong' || undefined}
            aria-describedby={state === 'wrong' ? `${id}-e` : undefined}
            className={cn(FIELD, 'h-12 text-[17px] uppercase tracking-[0.14em] tabular-nums', state === 'wrong' && 'animate-[kitshop-shake_0.4s_var(--ease-kit)] border-destructive')}
          />
          {state === 'wrong' && (
            <p id={`${id}-e`} role="alert" className="mt-2 flex items-start gap-1.5 text-[13px] text-destructive">
              <Icon name="alert-circle" size={14} className="mt-0.5 shrink-0" />
              {t.notFound}
            </p>
          )}
          <Button type="submit" size="lg" className="mt-5 w-full" iconLeft={state === 'checking' ? 'loader' : 'search'} disabled={state === 'checking' || code.replace(/\s/g, '').length < 12}>
            <Swap value={state === 'checking'}>{state === 'checking' ? t.checking : t.check}</Swap>
          </Button>
        </form>

        <div className="relative border-t border-border bg-surface p-6 sm:p-8 md:border-l md:border-t-0" aria-live="polite">
          {state === 'done' && bal ? (
            <div className="animate-[kitshop-in_0.5s_var(--ease-kit)]">
              <div className="flex items-center gap-5 sm:gap-6">
                <span className="relative grid size-28 shrink-0 place-items-center sm:size-32">
                  <svg viewBox="0 0 120 120" className="absolute inset-0 -rotate-90" aria-hidden>
                    <circle cx="60" cy="60" r="54" fill="none" strokeWidth="8" className="stroke-[color-mix(in_oklab,var(--foreground)_10%,transparent)]" />
                    <circle cx="60" cy="60" r="54" fill="none" strokeWidth="8" strokeLinecap="round" className="stroke-primary [animation:kitshop-draw_1.2s_var(--ease-kit)_both]" strokeDasharray={ring} strokeDashoffset={round(ring * (1 - share))} style={{ '--kitshop-len': ring } as React.CSSProperties} />
                  </svg>
                  <span className="relative text-center">
                    <span className="block text-[22px] font-semibold leading-none tracking-[-0.02em] tabular-nums text-foreground">{formatPrice(locale, bal.amount, currency)}</span>
                    <span className="mt-1 block text-[12px] text-muted-foreground">{t.left}</span>
                  </span>
                </span>
                <div className="min-w-0 text-[14px] text-muted-foreground">
                  <p>
                    {t.of} <span className="font-medium tabular-nums text-foreground">{formatPrice(locale, bal.initial, currency)}</span>
                  </p>
                  {bal.expires && (
                    <p className="mt-2">
                      {t.expires}
                      <span className="block font-medium text-foreground">{bal.expires}</span>
                    </p>
                  )}
                </div>
              </div>
              {bal.history?.length ? (
                <ul className="mt-6 divide-y divide-border border-t border-border">
                  {bal.history.map((h, i) => (
                    <li key={i} className="flex items-center justify-between gap-4 py-3 text-[14px] animate-[kitshop-in_0.4s_var(--ease-kit)_both]" style={{ animationDelay: `${200 + i * 70}ms` }}>
                      <span className="min-w-0">
                        <span className="block truncate text-foreground">{h.text}</span>
                        <span className="block text-[12.5px] text-muted-foreground">{h.date}</span>
                      </span>
                      <span className={cn('shrink-0 font-medium tabular-nums', h.amount < 0 ? 'text-foreground' : 'text-success-foreground')}>
                        {h.amount < 0 ? '-' : '+'}
                        {formatPrice(locale, Math.abs(h.amount), currency)}
                      </span>
                    </li>
                  ))}
                </ul>
              ) : null}
              <Button variant="ghost" className="mt-3 -ms-3" onClick={() => { setState('idle'); setCode(''); }}>
                {t.checkAnother}
              </Button>
            </div>
          ) : (
            <div className="grid h-full min-h-[14rem] place-items-center">
              {(p.designs ?? [])[0] && (
                <div className="w-full max-w-[18rem] -rotate-3 opacity-90 transition-transform duration-700 ease-[var(--ease-kit)] hover:rotate-0">
                  <GiftCard design={(p.designs ?? [])[0]} brand={p.brand} />
                </div>
              )}
            </div>
          )}
        </div>
      </div>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* redeem                                                              */
/* ------------------------------------------------------------------ */

function Redeem(p: GiftCardsProps & { t: Texts }) {
  const { t, currency } = p;
  const locale = useLocale();
  const cart = p.cart ?? { subtotal: 0, validCode: '', codeValue: 0 };
  const [open, setOpen] = useState(true);
  const [code, setCode] = useState(p.defaultCode ? formatCode(p.defaultCode) : '');
  const [applied, setApplied] = useState(false);
  const [wrong, setWrong] = useState(0);
  const id = useId();
  const before = cart.subtotal + (cart.shipping ?? 0);
  const used = applied ? Math.min(cart.codeValue, before) : 0;
  const total = before - used;
  const rest = applied ? Math.max(0, cart.codeValue - before) : 0;
  const apply = (e: React.FormEvent) => {
    e.preventDefault();
    if (code.replace(/\s/g, '') === cart.validCode.replace(/\s/g, '').toUpperCase()) {
      setApplied(true);
    } else setWrong((w) => w + 1);
  };
  return (
    <Section className={p.className}>
      <ShopMotion />
      <div className="mx-auto max-w-[28rem]">
        <Head eyebrow={p.eyebrow} title={p.title} description={p.description} />
        <div className={cn(CARD, 'p-5 sm:p-6')}>
          <dl className="space-y-2.5 text-[14.5px]">
            <div className="flex justify-between gap-4">
              <dt className="text-muted-foreground">{t.subtotal}</dt>
              <dd className="tabular-nums text-foreground">{formatPrice(locale, cart.subtotal, currency)}</dd>
            </div>
            <div className="flex justify-between gap-4">
              <dt className="text-muted-foreground">{t.shipping}</dt>
              <dd className={cn('tabular-nums', cart.shipping ? 'text-foreground' : 'text-success-foreground')}>{cart.shipping ? formatPrice(locale, cart.shipping, currency) : t.free}</dd>
            </div>
            {applied && (
              <div className="flex animate-[kitshop-in_0.4s_var(--ease-kit)] justify-between gap-4">
                <dt className="flex items-center gap-1.5 text-success-foreground">
                  <Icon name="gift" size={14} />
                  {t.giftCard} ·· {cart.validCode.slice(-4)}
                </dt>
                <dd className="tabular-nums text-success-foreground">-{formatPrice(locale, used, currency)}</dd>
              </div>
            )}
          </dl>

          <div className="mt-4 border-t border-border pt-4">
            {applied ? (
              <div className="flex animate-[kitshop-pop_0.4s_var(--ease-kit)] items-center justify-between gap-3 rounded-xl bg-[color-mix(in_oklab,var(--success)_12%,transparent)] px-3.5 py-2.5">
                <span className="flex items-center gap-2 text-[13.5px] font-medium text-success-foreground">
                  <Icon name="check-circle" size={16} />
                  {t.applied}
                </span>
                <button type="button" onClick={() => { setApplied(false); setCode(''); }} aria-label={t.remove} className={cn('grid size-9 place-items-center rounded-md text-muted-foreground hover:bg-accent hover:text-foreground', FOCUS)}>
                  <Icon name="x" size={15} />
                </button>
              </div>
            ) : (
              <>
                <button type="button" aria-expanded={open} onClick={() => setOpen(!open)} className={cn('flex min-h-11 w-full items-center justify-between gap-3 rounded-md text-[14.5px] font-medium text-foreground', FOCUS)}>
                  <span className="flex items-center gap-2">
                    <Icon name="gift" size={16} className="text-muted-foreground" />
                    {t.haveCard}
                  </span>
                  <Icon name="chevron-down" size={16} className={cn('text-muted-foreground transition-transform duration-300', open && 'rotate-180')} />
                </button>
                <div className={cn('grid transition-[grid-template-rows,opacity] duration-500 ease-[var(--ease-kit)] motion-reduce:transition-none', open ? 'grid-rows-[1fr] opacity-100' : 'grid-rows-[0fr] opacity-0')}>
                  <form onSubmit={apply} className="overflow-hidden">
                    <div className="flex gap-2 pt-2" key={`w${wrong}`}>
                      <label htmlFor={id} className="sr-only">
                        {t.code}
                      </label>
                      <input
                        id={id}
                        value={code}
                        onChange={(e) => setCode(formatCode(e.target.value))}
                        placeholder={t.codePlaceholder}
                        spellCheck={false}
                        autoComplete="off"
                        aria-invalid={wrong > 0 || undefined}
                        aria-describedby={wrong ? `${id}-e` : undefined}
                        className={cn(FIELD, 'w-0 min-w-0 flex-1 uppercase tracking-[0.1em] tabular-nums', wrong > 0 && 'animate-[kitshop-shake_0.4s_var(--ease-kit)] border-destructive')}
                      />
                      <Button type="submit" variant="outline" disabled={code.replace(/\s/g, '').length < 12}>
                        {t.apply}
                      </Button>
                    </div>
                    {wrong > 0 && (
                      <p id={`${id}-e`} role="alert" className="mt-2 text-[12.5px] text-destructive">
                        {t.wrongCode}
                      </p>
                    )}
                  </form>
                </div>
              </>
            )}
          </div>

          <div className="mt-4 flex items-baseline justify-between gap-4 border-t border-border pt-4">
            <span className="text-[15px] font-semibold text-foreground">{t.total}</span>
            <TweenPrice value={total} currency={currency} className="text-[22px] font-semibold tracking-[-0.02em] text-foreground" />
          </div>
          {rest > 0 && (
            <p className="mt-1 animate-[kitshop-fade_0.4s] text-right text-[12.5px] text-muted-foreground">
              <span className="tabular-nums text-foreground">{formatPrice(locale, rest, currency)}</span> {t.stillOnCard}
            </p>
          )}
          <Button size="lg" className="mt-5 w-full" icon="arrow-right">
            {t.pay}
          </Button>
        </div>
      </div>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* The block                                                           */
/* ------------------------------------------------------------------ */

/**
 * Gift cards in four layouts. designer: design and send one. amounts: ready
 * cards by occasion. balance: check what is left. redeem: apply a code in the cart.
 */
export function GiftCards(props: GiftCardsProps) {
  const { variant = 'designer' } = props;
  const t = useTexts(TEXTS, props.labels);
  if (variant === 'amounts') return <Amounts {...props} t={t} />;
  if (variant === 'balance') return <Balance {...props} t={t} />;
  if (variant === 'redeem') return <Redeem {...props} t={t} />;
  return <Designer {...props} t={t} />;
}