Subscriptions

'use client';

import { useId, 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 { Reveal } from '@/components/ui/reveal';
import { Stagger, useScrollProgress } from '@/components/ui/motion';
import { Eyebrow, Section } from '@/components/ui/section';
import { ProductMedia, ShopMotion, Swap, TweenPrice, formatNumber, formatPercent, formatPrice } from '@/components/ui/product-image';

/*
 * Selling something that comes again: coffee, tea, flowers, razors, pet food.
 *
 *   purchase-toggle  one-time or subscribe and save on the product page, with the rhythm
 *   plans            box sizes as plans, monthly or yearly, the price per delivery and per piece
 *   builder          three steps: what, how much, how often, with a summary that follows along
 *   schedule         the next deliveries on a timeline: skip, move, pause
 *   how-it-works     how a subscription works, in steps that light up while scrolling
 */

export type SubscriptionBoxVariant = 'purchase-toggle' | 'plans' | 'builder' | 'schedule' | 'how-it-works';

export interface SubPlan {
  id: string;
  name: string;
  /** e.g. "2 bags of 250 g" */
  amount: string;
  /** Price per delivery */
  price: number;
  /** Pieces per delivery, for the price per piece */
  pieces?: number;
  perks?: string[];
  tag?: string;
}

export interface SubOption {
  id: string;
  label: string;
  note?: string;
  icon?: IconName;
  image?: React.ReactNode;
}

export interface SubDelivery {
  id: string;
  /** Already formatted, e.g. "Tue, Nov 4" */
  date: string;
  /** What comes, e.g. "Nº 7 espresso · 2 × 250 g" */
  items: string;
  status?: 'shipped' | 'next' | 'planned' | 'skipped';
}

export interface SubscriptionBoxProps {
  variant?: SubscriptionBoxVariant;
  eyebrow?: string;
  title?: string;
  description?: string;
  /** purchase-toggle: the product */
  product?: { name: string; subtitle?: string; price: number; image?: React.ReactNode };
  /** Discount in percent for subscribers */
  discount?: number;
  /** Delivery rhythms in weeks */
  rhythms?: number[];
  defaultRhythm?: number;
  plans?: SubPlan[];
  /** plans: one piece, e.g. "bag", shown as "€12.45 per bag" */
  unitOne?: string;
  /** plans: yearly discount in percent on top */
  yearly?: number;
  /** builder: the question of each step, e.g. ["Which coffee?", "How much?", "How often?"] */
  questions?: [string, string, string];
  /** builder: the choices of step one, two and three */
  choices?: SubOption[];
  sizes?: (SubOption & { price: number })[];
  deliveries?: SubDelivery[];
  steps?: { icon?: IconName; title: string; text: string }[];
  perks?: string[];
  currency?: string;
  onSubscribe?: (detail: Record<string, string | number>) => void;
  labels?: Partial<Texts>;
  className?: string;
}

const TEXTS = {
  en: {
    oneTime: 'One-time purchase',
    subscribe: 'Subscribe and save',
    every: 'Every',
    everyWeek: 'Every week',
    week: 'week',
    weeks: 'weeks',
    deliverEvery: 'Deliver every',
    perDelivery: 'per delivery',
    perPiece: 'per piece',
    per: 'per',
    save: 'Save',
    addToCart: 'Add to cart',
    startSub: 'Start subscription',
    started: 'Subscription started',
    cancelAny: 'Skip, pause or cancel any time in your account.',
    monthly: 'Monthly',
    yearly: 'Yearly',
    billed: 'billed yearly',
    choose: 'Choose',
    chosen: 'Chosen',
    step: 'Step',
    of: 'of',
    next: 'Next',
    back: 'Back',
    summary: 'Your box',
    what: 'What',
    howMuch: 'How much',
    howOften: 'How often',
    then: 'then',
    shipped: 'Shipped',
    upNext: 'Up next',
    planned: 'Planned',
    skipped: 'Skipped',
    skip: 'Skip',
    undo: 'Undo skip',
    move: 'Move a week',
    moved: 'Moved',
    pause: 'Pause subscription',
    resume: 'Resume subscription',
    paused: 'Your subscription is paused. Nothing ships until you resume.',
  },
  de: {
    oneTime: 'Einmal kaufen',
    subscribe: 'Abonnieren und sparen',
    every: 'Alle',
    everyWeek: 'Jede Woche',
    week: 'Woche',
    weeks: 'Wochen',
    deliverEvery: 'Liefern alle',
    perDelivery: 'pro Lieferung',
    perPiece: 'pro Stück',
    per: 'pro',
    save: 'Spare',
    addToCart: 'In den Warenkorb',
    startSub: 'Abo starten',
    started: 'Abo gestartet',
    cancelAny: 'Jederzeit im Konto aussetzen, pausieren oder kündigen.',
    monthly: 'Monatlich',
    yearly: 'Jährlich',
    billed: 'jährlich abgerechnet',
    choose: 'Auswählen',
    chosen: 'Ausgewählt',
    step: 'Schritt',
    of: 'von',
    next: 'Weiter',
    back: 'Zurück',
    summary: 'Deine Box',
    what: 'Was',
    howMuch: 'Wie viel',
    howOften: 'Wie oft',
    then: 'danach',
    shipped: 'Versendet',
    upNext: 'Als Nächstes',
    planned: 'Geplant',
    skipped: 'Ausgesetzt',
    skip: 'Aussetzen',
    undo: 'Doch liefern',
    move: 'Eine Woche später',
    moved: 'Verschoben',
    pause: 'Abo pausieren',
    resume: 'Abo fortsetzen',
    paused: 'Dein Abo ist pausiert. Bis du es fortsetzt, wird nichts verschickt.',
  },
};

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 ACCENT_TEXT = 'text-[color-mix(in_oklab,var(--primary)_78%,var(--foreground))]';
const ACCENT_SOFT = 'bg-[color-mix(in_oklab,var(--primary)_12%,transparent)]';
const SAVE = 'text-success-foreground';

function Head({ eyebrow, title, description, center, aside }: { eyebrow?: string; title?: string; description?: string; center?: boolean; aside?: React.ReactNode }) {
  if (!title) return null;
  return (
    <div className={cn('mb-10 flex flex-col gap-6 sm:mb-12', center ? 'items-center text-center' : 'sm:flex-row sm:items-end sm:justify-between')}>
      <div className={cn('max-w-[40rem]', center && 'mx-auto')}>
        {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>
      {aside}
    </div>
  );
}

const weeksLabel = (t: Texts, n: number) => (n === 1 ? t.everyWeek : `${t.every} ${n} ${t.weeks}`);

/** Rhythm chips with a sliding thumb */
function Rhythm({ rhythms, value, onChange, t, name }: { rhythms: number[]; value: number; onChange: (n: number) => void; t: Texts; name: string }) {
  const i = Math.max(0, rhythms.indexOf(value));
  return (
    <div role="radiogroup" aria-label={t.deliverEvery} className="relative grid rounded-lg border border-border-strong bg-surface p-1" style={{ gridTemplateColumns: `repeat(${rhythms.length}, minmax(0, 1fr))` }}>
      <span aria-hidden className="absolute inset-y-1 left-1 rounded-md bg-background shadow-[var(--highlight),var(--shadow-sm)] transition-transform duration-300 ease-[var(--ease-kit)] motion-reduce:transition-none" style={{ width: `calc((100% - 0.5rem) / ${rhythms.length})`, transform: `translateX(${i * 100}%)` }} />
      {rhythms.map((n) => (
        <label key={n} className={cn('relative z-10 grid min-h-11 cursor-pointer place-items-center rounded-md px-1 text-center text-[13px] font-medium transition-colors has-[:focus-visible]:outline-2 has-[:focus-visible]:outline-[var(--ring)]', n === value ? 'text-foreground' : 'text-muted-foreground hover:text-foreground')}>
          <input type="radio" name={name} checked={n === value} onChange={() => onChange(n)} className="sr-only" />
          {n} {n === 1 ? t.week : t.weeks}
        </label>
      ))}
    </div>
  );
}

/* ------------------------------------------------------------------ */
/* purchase-toggle                                                     */
/* ------------------------------------------------------------------ */

function PurchaseToggle(p: SubscriptionBoxProps & { t: Texts }) {
  const { t, currency, product } = p;
  const locale = useLocale();
  const rhythms = p.rhythms ?? [2, 4, 6];
  const [mode, setMode] = useState<'once' | 'sub'>('sub');
  const [rhythm, setRhythm] = useState(p.defaultRhythm ?? rhythms[0]);
  const [done, setDone] = useState(false);
  const name = useId();
  const price = product?.price ?? 0;
  const subPrice = round(price * (1 - (p.discount ?? 0) / 100));
  const shown = mode === 'sub' ? subPrice : price;
  return (
    <Section className={p.className}>
      <ShopMotion />
      <div className="grid grid-cols-1 gap-10 lg:grid-cols-[minmax(0,1fr)_minmax(0,1fr)] lg:items-center lg:gap-16">
        <Reveal effect="scale">
          <ProductMedia className="aspect-[4/3] lg:aspect-square">{product?.image}</ProductMedia>
        </Reveal>
        <div>
          {p.eyebrow && <Eyebrow>{p.eyebrow}</Eyebrow>}
          <h2 className="kit-rise text-balance text-h2 font-semibold text-foreground">{p.title ?? product?.name}</h2>
          {product?.subtitle && <p className="kit-rise mt-2 text-[15px] text-muted-foreground">{product.subtitle}</p>}
          <div className="mt-5 flex items-baseline gap-3">
            <TweenPrice value={shown} currency={currency} className="text-[28px] font-semibold tracking-[-0.02em] text-foreground" />
            {mode === 'sub' && (
              <s key="was" className="animate-[kitshop-fade_0.3s] text-[15px] tabular-nums text-muted-foreground">
                {formatPrice(locale, price, currency)}
              </s>
            )}
          </div>

          <fieldset className="mt-7 space-y-2">
            <legend className="sr-only">{t.subscribe}</legend>
            {(['sub', 'once'] as const).map((m) => {
              const on = mode === m;
              return (
                <div key={m} className={cn('rounded-xl border transition-[border-color,box-shadow] duration-300', on ? 'border-foreground bg-card shadow-[0_0_0_1px_var(--foreground)]' : 'border-border bg-card hover:border-border-strong')}>
                  <label className="flex min-h-14 cursor-pointer items-center gap-3 px-4 py-3 has-[:focus-visible]:outline-2 has-[:focus-visible]:outline-offset-2 has-[:focus-visible]:outline-[var(--ring)]">
                    <input type="radio" name={name} checked={on} onChange={() => setMode(m)} className="sr-only" />
                    <span aria-hidden className={cn('grid size-5 shrink-0 place-items-center rounded-full border-2 transition-colors', on ? 'border-foreground' : 'border-border-strong')}>
                      <span className={cn('size-2.5 rounded-full bg-foreground transition-transform duration-300 ease-[var(--ease-kit)]', on ? 'scale-100' : 'scale-0')} />
                    </span>
                    <span className="flex-1 text-[15px] font-medium text-foreground">{m === 'sub' ? t.subscribe : t.oneTime}</span>
                    {m === 'sub' && p.discount ? <span className={cn('rounded-full px-2 py-0.5 text-[12.5px] font-semibold', 'bg-[color-mix(in_oklab,var(--success)_14%,transparent)]', SAVE)}>-{formatPercent(locale, p.discount)}</span> : null}
                    <span className="text-[14.5px] font-semibold tabular-nums text-foreground">{formatPrice(locale, m === 'sub' ? subPrice : price, currency)}</span>
                  </label>
                  {m === 'sub' && (
                    <div className={cn('grid transition-[grid-template-rows,opacity] duration-500 ease-[var(--ease-kit)] motion-reduce:transition-none', on ? 'grid-rows-[1fr] opacity-100' : 'grid-rows-[0fr] opacity-0')}>
                      <div className="overflow-hidden" inert={!on}>
                        <div className="space-y-3 px-4 pb-4">
                          <p className="text-[13px] text-muted-foreground">{t.deliverEvery}</p>
                          <Rhythm rhythms={rhythms} value={rhythm} onChange={setRhythm} t={t} name={`${name}-r`} />
                          {p.perks?.length ? (
                            <ul className="grid grid-cols-1 gap-1.5 pt-1 sm:grid-cols-2">
                              {p.perks.map((perk) => (
                                <li key={perk} className="flex items-start gap-2 text-[13px] text-foreground">
                                  <Icon name="check" size={14} className={cn('mt-0.5 shrink-0', SAVE)} />
                                  {perk}
                                </li>
                              ))}
                            </ul>
                          ) : null}
                        </div>
                      </div>
                    </div>
                  )}
                </div>
              );
            })}
          </fieldset>
          <Button
            size="lg"
            className="mt-6 w-full"
            iconLeft={done ? 'check' : mode === 'sub' ? 'repeat' : 'bag'}
            onClick={() => {
              setDone(true);
              p.onSubscribe?.({ mode, rhythm, price: shown });
            }}
          >
            <Swap value={`${mode}-${done}`}>{done ? (mode === 'sub' ? t.started : t.addToCart) : mode === 'sub' ? `${t.startSub} · ${weeksLabel(t, rhythm)}` : t.addToCart}</Swap>
          </Button>
          {mode === 'sub' && <p className="mt-3 animate-[kitshop-fade_0.3s] text-center text-[13px] text-muted-foreground">{t.cancelAny}</p>}
        </div>
      </div>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* plans                                                               */
/* ------------------------------------------------------------------ */

function Plans(p: SubscriptionBoxProps & { t: Texts }) {
  const { t, currency } = p;
  const locale = useLocale();
  const [period, setPeriod] = useState<'month' | 'year'>('month');
  const [picked, setPicked] = useState<string | null>(null);
  const factor = period === 'year' ? 1 - (p.yearly ?? 0) / 100 : 1;
  return (
    <Section className={p.className}>
      <ShopMotion />
      <Head
        eyebrow={p.eyebrow}
        title={p.title}
        description={p.description}
        center
        aside={
          p.yearly ? (
            <div role="radiogroup" aria-label={`${t.monthly}, ${t.yearly}`} className="relative grid w-[19rem] grid-cols-2 rounded-full border border-border-strong bg-surface p-1">
              <span aria-hidden className="absolute inset-y-1 left-1 w-[calc(50%-0.25rem)] rounded-full bg-foreground transition-transform duration-300 ease-[var(--ease-kit)] motion-reduce:transition-none" style={{ transform: `translateX(${period === 'year' ? 100 : 0}%)` }} />
              {(['month', 'year'] as const).map((k) => (
                <button key={k} type="button" role="radio" aria-checked={period === k} onClick={() => setPeriod(k)} className={cn('relative z-10 inline-flex h-10 items-center justify-center gap-1.5 rounded-full text-[13.5px] font-medium transition-colors', period === k ? 'text-background' : 'text-muted-foreground hover:text-foreground', FOCUS)}>
                  {k === 'month' ? t.monthly : t.yearly}
                  {k === 'year' && <span className={cn('text-[11.5px] font-semibold', period === k ? 'opacity-80' : SAVE)}>-{formatPercent(locale, p.yearly!)}</span>}
                </button>
              ))}
            </div>
          ) : null
        }
      />
      <Stagger step={90} as="ul" className="grid grid-cols-1 gap-4 sm:grid-cols-3 lg:gap-6">
        {(p.plans ?? []).map((plan) => {
          const price = round(plan.price * factor);
          const on = picked === plan.id;
          const hero = !!plan.tag;
          return (
            <li key={plan.id}>
              <article className={cn(CARD, 'relative flex h-full flex-col p-6 transition-[transform,box-shadow] duration-500 ease-[var(--ease-kit)] hover:-translate-y-1 motion-reduce:transition-none', hero && 'shadow-[var(--highlight),0_0_0_1.5px_var(--primary),var(--shadow-md)]')}>
                {plan.tag && <span className="absolute -top-3 left-6 rounded-full bg-primary px-2.5 py-1 text-[12px] font-medium text-primary-foreground shadow-[var(--shadow-sm)]">{plan.tag}</span>}
                <h3 className="text-[19px] font-semibold tracking-[-0.015em] text-foreground">{plan.name}</h3>
                <p className="mt-1 text-[14px] text-muted-foreground">{plan.amount}</p>
                <TweenPrice value={price} currency={currency} className="mt-6 block text-[32px] font-semibold tracking-[-0.03em] text-foreground" />
                <p className="mt-1 text-[13px] text-muted-foreground">
                  {t.perDelivery}
                  {plan.pieces ? (
                    <>
                      {' · '}
                      <span className="tabular-nums">{formatPrice(locale, price / plan.pieces, currency)}</span> {p.unitOne ? `${t.per} ${p.unitOne}` : t.perPiece}
                    </>
                  ) : null}
                </p>
                <p className={cn('h-5 text-[12.5px] transition-opacity duration-300', SAVE, period === 'year' ? 'opacity-100' : 'opacity-0')} aria-hidden={period !== 'year'}>
                  {t.billed}
                </p>
                {plan.perks?.length ? (
                  <ul className="mt-6 space-y-2.5 border-t border-border pt-6">
                    {plan.perks.map((perk) => (
                      <li key={perk} className="flex items-start gap-2.5 text-[14px] text-foreground">
                        <Icon name="check" size={16} className={cn('mt-px shrink-0', ACCENT_TEXT)} />
                        {perk}
                      </li>
                    ))}
                  </ul>
                ) : null}
                <div className="mt-auto pt-7">
                  <Button className="w-full" variant={hero || on ? 'primary' : 'outline'} iconLeft={on ? 'check' : undefined} onClick={() => { setPicked(plan.id); p.onSubscribe?.({ plan: plan.id, period, price }); }}>
                    <Swap value={on}>{on ? t.chosen : `${t.choose} · ${plan.name}`}</Swap>
                  </Button>
                </div>
              </article>
            </li>
          );
        })}
      </Stagger>
      <p className="mt-8 text-center text-[13.5px] text-muted-foreground">{t.cancelAny}</p>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* builder                                                             */
/* ------------------------------------------------------------------ */

function Builder(p: SubscriptionBoxProps & { t: Texts }) {
  const { t, currency } = p;
  const locale = useLocale();
  const choices = p.choices ?? [];
  const sizes = p.sizes ?? [];
  const rhythms = p.rhythms ?? [2, 4];
  const [step, setStep] = useState(0);
  const [choice, setChoice] = useState(choices[0]?.id ?? '');
  const [size, setSize] = useState(sizes[1]?.id ?? sizes[0]?.id ?? '');
  const [rhythm, setRhythm] = useState(p.defaultRhythm ?? rhythms[0]);
  const [done, setDone] = useState(false);
  const [dir, setDir] = useState<1 | -1>(1);
  const name = useId();
  const c = choices.find((x) => x.id === choice);
  const s = sizes.find((x) => x.id === size);
  const price = s ? round(s.price * (1 - (p.discount ?? 0) / 100)) : 0;
  const titles = [t.what, t.howMuch, t.howOften];
  const go = (n: number) => {
    setDir(n > step ? 1 : -1);
    setStep(n);
  };
  const tile = (on: boolean) => cn('relative flex h-full cursor-pointer flex-col rounded-xl border p-4 max-sm:min-h-16 max-sm:justify-center max-sm:pe-10 transition-[border-color,box-shadow,transform] duration-300 hover:-translate-y-0.5 has-[:focus-visible]:outline-2 has-[:focus-visible]:outline-offset-2 has-[:focus-visible]:outline-[var(--ring)]', on ? 'border-foreground bg-card shadow-[0_0_0_1px_var(--foreground)]' : 'border-border bg-card hover:border-border-strong');
  const checkMark = <span aria-hidden className="absolute right-3 top-3 grid size-5 animate-[kitshop-pop_0.35s_var(--ease-kit)] place-items-center rounded-full bg-foreground text-background"><Icon name="check" size={12} strokeWidth={2.4} /></span>;
  return (
    <Section className={p.className}>
      <ShopMotion />
      <Head eyebrow={p.eyebrow} title={p.title} description={p.description} />
      <div className="grid grid-cols-1 gap-8 lg:grid-cols-[minmax(0,1fr)_20rem] lg:gap-12">
        <div className="min-w-0">
          {/* Steps as a bar that fills, each step a button */}
          <ol className="grid grid-cols-3 gap-2">
            {titles.map((x, i) => (
              <li key={x}>
                <button type="button" onClick={() => go(i)} aria-current={step === i ? 'step' : undefined} className={cn('group/st relative block w-full after:absolute after:inset-x-0 after:-inset-y-2 after:content-[""] text-left', FOCUS)}>
                  <span className="relative block h-1 overflow-hidden rounded-full bg-[color-mix(in_oklab,var(--foreground)_10%,transparent)]">
                    <span className="absolute inset-0 origin-left rounded-full bg-primary transition-transform duration-500 ease-[var(--ease-kit)]" style={{ transform: `scaleX(${i <= step ? 1 : 0})` }} />
                  </span>
                  <span className={cn('mt-2 block text-[12.5px]', i === step ? 'font-semibold text-foreground' : 'text-muted-foreground group-hover/st:text-foreground')}>
                    <span className="tabular-nums">{i + 1}</span> · {x}
                  </span>
                </button>
              </li>
            ))}
          </ol>
          <div key={step} className={cn('mt-8', dir === 1 ? 'animate-[kitshop-next_0.45s_var(--ease-kit)]' : 'animate-[kitshop-prev_0.45s_var(--ease-kit)]')}>
            <h3 className="text-[18px] font-semibold text-foreground">{p.questions?.[step] ?? titles[step]}</h3>
            {step === 0 && (
              <div role="radiogroup" aria-label={t.what} className="mt-4 grid grid-cols-1 gap-3 sm:grid-cols-3">
                {choices.map((x) => (
                  <label key={x.id} className={tile(x.id === choice)}>
                    <input type="radio" name={`${name}-c`} checked={x.id === choice} onChange={() => setChoice(x.id)} className="sr-only" />
                    {x.image ? <ProductMedia className="mb-3 aspect-[4/3] rounded-lg max-sm:absolute max-sm:left-3 max-sm:top-1/2 max-sm:mb-0 max-sm:size-14 max-sm:-translate-y-1/2 max-sm:aspect-square">{x.image}</ProductMedia> : <Icon name={x.icon ?? 'coffee'} size={22} className="mb-3 text-foreground" />}
                    <span className={cn('text-[15px] font-semibold text-foreground', x.image && 'max-sm:ps-[4.25rem]')}>{x.label}</span>
                    {x.note && <span className={cn('mt-0.5 text-[13px] leading-snug text-muted-foreground', x.image && 'max-sm:ps-[4.25rem]')}>{x.note}</span>}
                    {x.id === choice && checkMark}
                  </label>
                ))}
              </div>
            )}
            {step === 1 && (
              <div role="radiogroup" aria-label={t.howMuch} className="mt-4 grid grid-cols-1 gap-3 sm:grid-cols-3">
                {sizes.map((x) => (
                  <label key={x.id} className={tile(x.id === size)}>
                    <input type="radio" name={`${name}-s`} checked={x.id === size} onChange={() => setSize(x.id)} className="sr-only" />
                    <span className="text-[15px] font-semibold text-foreground">{x.label}</span>
                    {x.note && <span className="mt-0.5 text-[13px] text-muted-foreground">{x.note}</span>}
                    <span className="mt-4 text-[17px] font-semibold tabular-nums text-foreground">{formatPrice(locale, round(x.price * (1 - (p.discount ?? 0) / 100)), currency)}</span>
                    {x.id === size && checkMark}
                  </label>
                ))}
              </div>
            )}
            {step === 2 && (
              <div className="mt-4 max-w-[30rem]">
                <Rhythm rhythms={rhythms} value={rhythm} onChange={setRhythm} t={t} name={`${name}-r`} />
                <p className="mt-3 text-[13.5px] text-muted-foreground">{t.cancelAny}</p>
              </div>
            )}
          </div>
          <div className="mt-8 flex gap-2">
            {step > 0 && (
              <Button variant="ghost" iconLeft="arrow-left" onClick={() => go(step - 1)}>
                {t.back}
              </Button>
            )}
            {step < 2 && (
              <Button variant="outline" icon="arrow-right" onClick={() => go(step + 1)}>
                {t.next}
              </Button>
            )}
          </div>
        </div>

        <aside className="lg:sticky lg:top-8 lg:self-start" aria-label={t.summary}>
          <div className={cn(CARD, 'p-5 sm:p-6')}>
            <p className="text-[13px] font-medium text-muted-foreground">{t.summary}</p>
            <dl className="mt-3 divide-y divide-border text-[14px]">
              {[
                [t.what, c?.label],
                [t.howMuch, s?.label],
                [t.howOften, weeksLabel(t, rhythm)],
              ].map(([k, v], i) => (
                <div key={k} className="flex items-baseline justify-between gap-3 py-2.5">
                  <dt className="text-muted-foreground">{k}</dt>
                  <dd className={cn('text-right font-medium text-foreground', i === step && 'text-[color-mix(in_oklab,var(--primary)_80%,var(--foreground))]')}>
                    <Swap value={v ?? ''}>{v}</Swap>
                  </dd>
                </div>
              ))}
            </dl>
            <div className="mt-2 flex items-baseline justify-between gap-3 border-t border-border pt-4">
              <span className="text-[14px] text-muted-foreground">{t.perDelivery}</span>
              <TweenPrice value={price} currency={currency} className="text-[22px] font-semibold tracking-[-0.02em] text-foreground" />
            </div>
            <Button size="lg" className="mt-5 w-full" iconLeft={done ? 'check' : 'repeat'} onClick={() => { setDone(true); p.onSubscribe?.({ choice, size, rhythm, price }); }}>
              <Swap value={done}>{done ? t.started : t.startSub}</Swap>
            </Button>
            <p className="mt-2 text-center text-[12.5px] text-muted-foreground">{t.cancelAny}</p>
          </div>
        </aside>
      </div>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* schedule                                                            */
/* ------------------------------------------------------------------ */

function Schedule(p: SubscriptionBoxProps & { t: Texts }) {
  const { t } = p;
  const [list, setList] = useState<SubDelivery[]>(p.deliveries ?? []);
  const [moved, setMoved] = useState<Record<string, boolean>>({});
  const [paused, setPaused] = useState(false);
  const line = useScrollProgress<HTMLOListElement>({ start: 0.1, end: 0.6 });
  const toggleSkip = (id: string) => setList((l) => l.map((d) => (d.id === id ? { ...d, status: d.status === 'skipped' ? 'planned' : 'skipped' } : d)));
  const STATE: Record<NonNullable<SubDelivery['status']>, { label: string; cls: string; icon: IconName }> = {
    shipped: { label: t.shipped, cls: 'bg-[color-mix(in_oklab,var(--success)_14%,transparent)] text-success-foreground', icon: 'truck' },
    next: { label: t.upNext, cls: cn(ACCENT_SOFT, ACCENT_TEXT), icon: 'package' },
    planned: { label: t.planned, cls: 'bg-muted text-muted-foreground', icon: 'calendar' },
    skipped: { label: t.skipped, cls: 'bg-muted text-subtle-foreground', icon: 'ban' },
  };
  return (
    <Section className={p.className}>
      <ShopMotion />
      <Head
        eyebrow={p.eyebrow}
        title={p.title}
        description={p.description}
        aside={
          <Button variant="outline" iconLeft={paused ? 'play' : 'pause'} aria-pressed={paused} onClick={() => setPaused(!paused)}>
            <Swap value={paused}>{paused ? t.resume : t.pause}</Swap>
          </Button>
        }
      />
      {paused && (
        <p className="mb-6 flex animate-[kitshop-in_0.35s_var(--ease-kit)] items-center gap-2 rounded-xl border border-[color-mix(in_oklab,var(--warning)_45%,transparent)] bg-[color-mix(in_oklab,var(--warning)_14%,transparent)] px-4 py-3 text-[14px] font-medium text-warning-foreground" role="status">
          <Icon name="pause" size={16} />
          {t.paused}
        </p>
      )}
      <ol ref={line} className={cn('relative transition-opacity duration-500', paused && 'opacity-50')}>
        <span aria-hidden className="absolute bottom-6 left-[21px] top-6 w-0.5 rounded-full bg-border sm:left-[23px]" />
        <span aria-hidden className="absolute left-[21px] top-6 h-[calc(100%-3rem)] w-0.5 origin-top rounded-full bg-primary sm:left-[23px]" style={{ transform: 'scaleY(var(--kit-progress, 1))' }} />
        {list.map((d, i) => {
          const st = STATE[d.status ?? 'planned'];
          const editable = d.status !== 'shipped';
          return (
            <li key={d.id} className="relative flex gap-4 pb-6 last:pb-0 sm:gap-6">
              <span className={cn('relative z-10 grid size-11 shrink-0 place-items-center rounded-full border-4 border-background sm:size-12', d.status === 'next' ? 'bg-primary text-primary-foreground' : d.status === 'shipped' ? 'bg-success text-[oklch(0.99_0_0)]' : 'bg-muted text-muted-foreground')}>
                <Icon name={st.icon} size={18} />
              </span>
              <Reveal effect="rise" delay={i * 70} className={cn(CARD, 'min-w-0 flex-1 p-4 sm:p-5', d.status === 'skipped' && 'bg-surface shadow-none')}>
                <div className="flex flex-wrap items-center justify-between gap-x-4 gap-y-2">
                  <div className="min-w-0">
                    <p className={cn('text-[16px] font-semibold text-foreground', d.status === 'skipped' && 'text-muted-foreground line-through decoration-1')}>
                      <Swap value={`${d.date}-${moved[d.id] ? 1 : 0}`}>{d.date}</Swap>
                    </p>
                    <p className="text-[13.5px] text-muted-foreground">{d.items}</p>
                  </div>
                  <span className={cn('inline-flex items-center gap-1 rounded-full px-2.5 py-1 text-[12px] font-medium', st.cls)}>{moved[d.id] && d.status !== 'skipped' ? t.moved : st.label}</span>
                </div>
                {editable && (
                  <div className="mt-3 flex flex-wrap gap-1 border-t border-border pt-3">
                    <Button size="sm" variant="ghost" className="h-11 sm:h-9" iconLeft={d.status === 'skipped' ? 'undo' : 'skip-forward'} onClick={() => toggleSkip(d.id)} disabled={paused}>
                      {d.status === 'skipped' ? t.undo : t.skip}
                    </Button>
                    {d.status !== 'skipped' && (
                      <Button size="sm" variant="ghost" className="h-11 sm:h-9" iconLeft="calendar" disabled={paused || moved[d.id]} onClick={() => setMoved((m) => ({ ...m, [d.id]: true }))}>
                        {t.move}
                      </Button>
                    )}
                  </div>
                )}
              </Reveal>
            </li>
          );
        })}
      </ol>
    </Section>
  );
}

/* ------------------------------------------------------------------ */
/* how-it-works                                                        */
/* ------------------------------------------------------------------ */

function HowItWorks(p: SubscriptionBoxProps & { t: Texts }) {
  const steps = p.steps ?? [];
  const line = useScrollProgress<HTMLDivElement>({ start: 0.15, end: 0.6 });
  return (
    <Section className={p.className}>
      <ShopMotion />
      <Head eyebrow={p.eyebrow} title={p.title} description={p.description} center />
      <div ref={line} className="relative">
        {/* The line that joins the steps fills while scrolling: across on desktop, down on phones */}
        <span aria-hidden className="absolute hidden h-0.5 rounded-full bg-border lg:block" style={{ top: 31, left: `${round(50 / Math.max(1, steps.length), 2)}%`, right: `${round(50 / Math.max(1, steps.length), 2)}%` }} />
        <span aria-hidden className="absolute hidden h-0.5 origin-left rounded-full bg-primary lg:block" style={{ top: 31, left: `${round(50 / Math.max(1, steps.length), 2)}%`, right: `${round(50 / Math.max(1, steps.length), 2)}%`, transform: 'scaleX(var(--kit-progress, 1))' }} />
        <span aria-hidden className="absolute bottom-8 left-[31px] top-8 w-0.5 rounded-full bg-border sm:hidden" />
        <span aria-hidden className="absolute left-[31px] top-8 h-[calc(100%-4rem)] w-0.5 origin-top rounded-full bg-primary sm:hidden" style={{ transform: 'scaleY(var(--kit-progress, 1))' }} />
        <ol className={cn('grid grid-cols-1 gap-8 sm:grid-cols-2 lg:gap-6', steps.length >= 4 ? 'lg:grid-cols-4' : 'lg:grid-cols-3')}>
          {steps.map((s, i) => (
            <Reveal as="li" key={s.title} effect="rise" delay={i * 110} className="relative flex gap-4 lg:flex-col lg:items-center lg:text-center">
              <span className="relative z-10 grid size-16 shrink-0 place-items-center rounded-2xl border-4 border-background bg-card text-foreground shadow-[var(--highlight),0_0_0_1px_var(--border),var(--shadow-sm)]">
                <Icon name={s.icon ?? 'package'} size={24} />
                <span className="absolute -right-1.5 -top-1.5 grid size-6 place-items-center rounded-full bg-primary text-[11.5px] font-semibold tabular-nums text-primary-foreground">{i + 1}</span>
              </span>
              <span className="lg:mt-5">
                <span className="block text-[17px] font-semibold text-foreground">{s.title}</span>
                <span className="mt-1.5 block text-pretty text-[14.5px] leading-relaxed text-muted-foreground lg:mx-auto lg:max-w-[16rem]">{s.text}</span>
              </span>
            </Reveal>
          ))}
        </ol>
      </div>
    </Section>
  );
}

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

/**
 * Subscriptions in five layouts. purchase-toggle: one-time or subscribe on
 * the product page. plans: box sizes. builder: three steps to a box.
 * schedule: the next deliveries. how-it-works: the steps.
 */
export function SubscriptionBox(props: SubscriptionBoxProps) {
  const { variant = 'purchase-toggle' } = props;
  const t = useTexts(TEXTS, props.labels);
  if (variant === 'plans') return <Plans {...props} t={t} />;
  if (variant === 'builder') return <Builder {...props} t={t} />;
  if (variant === 'schedule') return <Schedule {...props} t={t} />;
  if (variant === 'how-it-works') return <HowItWorks {...props} t={t} />;
  return <PurchaseToggle {...props} t={t} />;
}