Product image

'use client';

import { useEffect, useId, useRef, useState } from 'react';
import { cn, prefersReducedMotion, round, useLocale, useTexts, type Locale } from '@/lib/kit';
import { Icon } from '@/components/ui/icon';

/*
 * Shop foundation for the ecommerce blocks.
 *
 * ProductImage   drawn product motifs on soft light, for demos and placeholders.
 *                In a real shop pass your own <img> into the blocks instead.
 * ProductMedia   the frame every product image sits in (radius, crop, surface).
 * formatPrice    prices in the format of the language: 24,90 € / €24.90.
 * Price, Rating, Quantity, SwatchGroup, TaxNote   small parts all shop blocks share.
 */

/* ------------------------------------------------------------------ */
/* Types shared by the shop blocks                                     */
/* ------------------------------------------------------------------ */

export interface ShopColor {
  name: string;
  /** Any CSS color for the swatch, e.g. a value from PRODUCT_TONES */
  color: string;
  /** Optional image for this color, shown when the color is picked */
  image?: React.ReactNode;
}

/** A size option. Plain strings work too, objects can be sold out. */
export interface ShopSize {
  label: string;
  /** Shown struck through and cannot be picked */
  soldOut?: boolean;
}

/** Sizes as plain strings or objects, always as objects */
export const sizesOf = (sizes?: (string | ShopSize)[]): ShopSize[] => (sizes ?? []).map((s) => (typeof s === 'string' ? { label: s } : s));

/** The size to preselect: the middle one that is in stock */
export function defaultSize(sizes?: (string | ShopSize)[], prefer = 0.5): string {
  const all = sizesOf(sizes);
  const open = all.filter((s) => !s.soldOut);
  return open[Math.min(open.length - 1, Math.floor((open.length - 1) * prefer))]?.label ?? '';
}

export interface ShopProduct {
  id: string;
  name: string;
  href?: string;
  price: number;
  /** Former price, shows the price as reduced */
  compareAt?: number;
  /** Main image, any node: <img>, <ProductImage>, … */
  image: React.ReactNode;
  /** Second image, shown on hover in grids */
  hoverImage?: React.ReactNode;
  /** All images for galleries, the first one is the main image */
  images?: React.ReactNode[];
  /** One short line under the name: color, material, size */
  subtitle?: string;
  description?: string;
  /** Small label on the image: New, Bestseller, -20 % */
  badge?: string;
  category?: string;
  rating?: number;
  reviews?: number;
  colors?: ShopColor[];
  /** Sizes as strings, or as { label, soldOut } to mark single sizes as sold out */
  sizes?: (string | ShopSize)[];
  soldOut?: boolean;
}

export interface LineItem {
  id: string;
  name: string;
  href?: string;
  /** Picked options, e.g. "Sage · 350 ml" */
  variant?: string;
  /** Unit price, gross */
  price: number;
  compareAt?: number;
  quantity: number;
  image: React.ReactNode;
}

/* ------------------------------------------------------------------ */
/* Built-in texts                                                      */
/* ------------------------------------------------------------------ */

const TEXTS = {
  en: {
    quantity: 'Quantity',
    decrease: 'Decrease quantity',
    increase: 'Increase quantity',
    outOf: 'out of 5 stars',
    reviews: 'reviews',
    salePrice: 'Sale price',
    regularPrice: 'Regular price',
    taxIncl: 'Incl. VAT, plus shipping',
    taxInclFree: 'Incl. VAT, free shipping',
    color: 'Color',
    soldOut: 'sold out',
  },
  de: {
    quantity: 'Menge',
    decrease: 'Menge verringern',
    increase: 'Menge erhöhen',
    outOf: 'von 5 Sternen',
    reviews: 'Bewertungen',
    salePrice: 'Angebotspreis',
    regularPrice: 'Regulärer Preis',
    taxIncl: 'inkl. MwSt., zzgl. Versand',
    taxInclFree: 'inkl. MwSt., versandkostenfrei',
    color: 'Farbe',
    soldOut: 'ausverkauft',
  },
};

/* ------------------------------------------------------------------ */
/* Numbers and prices                                                  */
/* ------------------------------------------------------------------ */

const intlLocale = (locale: Locale) => (locale === 'de' ? 'de-DE' : 'en-US');

/** 24,90 € in German, €24.90 in English. Whole amounts keep their cents, as shops do. */
export function formatPrice(locale: Locale, value: number, currency = 'EUR') {
  return new Intl.NumberFormat(intlLocale(locale), { style: 'currency', currency }).format(value);
}

/** 4,8 / 4.8, 1.204 / 1,204 */
export function formatNumber(locale: Locale, value: number, digits = 0) {
  return new Intl.NumberFormat(intlLocale(locale), { minimumFractionDigits: digits, maximumFractionDigits: digits }).format(value);
}

/** Percent in the format of the language: 19 % / 19% */
export function formatPercent(locale: Locale, value: number) {
  return locale === 'de' ? `${formatNumber(locale, value)} %` : `${formatNumber(locale, value)}%`;
}

/** VAT contained in a gross amount, e.g. 19 % */
export const vatOf = (gross: number, rate = 19) => round((gross * rate) / (100 + rate));

/** A price, with the former price struck through when reduced. */
export function Price({ value, compareAt, currency = 'EUR', size = 'md', className }: { value: number; compareAt?: number; currency?: string; size?: 'sm' | 'md' | 'lg' | 'xl'; className?: string }) {
  const locale = useLocale();
  const t = useTexts(TEXTS);
  const reduced = compareAt !== undefined && compareAt > value;
  const SIZE = { sm: 'text-[13px]', md: 'text-[15px]', lg: 'text-[19px]', xl: 'text-[26px] tracking-[-0.02em]' };
  return (
    <span className={cn('inline-flex flex-wrap items-baseline gap-x-2 tabular-nums', className)}>
      {reduced && <span className="sr-only">{t.salePrice}</span>}
      <span className={cn('font-semibold text-foreground', SIZE[size], reduced && 'text-[color-mix(in_oklch,var(--destructive)_85%,var(--foreground))]')}>{formatPrice(locale, value, currency)}</span>
      {reduced && (
        <>
          <span className="sr-only">{t.regularPrice}</span>
          <s className={cn('text-muted-foreground decoration-[1px]', size === 'xl' ? 'text-[16px]' : size === 'lg' ? 'text-[14px]' : 'text-[13px]')}>{formatPrice(locale, compareAt!, currency)}</s>
        </>
      )}
    </span>
  );
}

/** "Incl. VAT, plus shipping" / "inkl. MwSt., zzgl. Versand", with an optional link to the shipping page */
export function TaxNote({ freeShipping, href, className }: { freeShipping?: boolean; href?: string; className?: string }) {
  const t = useTexts(TEXTS);
  const text = freeShipping ? t.taxInclFree : t.taxIncl;
  return (
    <p className={cn('text-[12px] text-muted-foreground', className)}>
      {href ? (
        <a href={href} className="underline decoration-border-strong underline-offset-2 hover:text-foreground">
          {text}
        </a>
      ) : (
        text
      )}
    </p>
  );
}

/* ------------------------------------------------------------------ */
/* Shop motion                                                         */
/* ------------------------------------------------------------------ */

/*
 * Small motions the shop blocks share. All of them only start after a
 * change in the browser, so the server renders the final state, and all of
 * them stop with reduced motion.
 */
const SHOP_CSS = `
@keyframes kitshop-swap{from{opacity:0;transform:translateY(55%)}}
@keyframes kitshop-up{from{opacity:0;transform:translateY(70%)}}
@keyframes kitshop-down{from{opacity:0;transform:translateY(-70%)}}
@keyframes kitshop-fly{0%{opacity:0;transform:translate(-50%,6px) scale(.8)}18%{opacity:1;transform:translate(-50%,-6px) scale(1)}100%{opacity:0;transform:translate(-50%,-38px) scale(.96)}}
@keyframes kitshop-pop{0%{opacity:0;transform:scale(.5)}60%{opacity:1;transform:scale(1.08)}100%{transform:scale(1)}}
@keyframes kitshop-in{from{opacity:0;transform:translateY(12px) scale(.98)}}
@keyframes kitshop-fade{from{opacity:0}}
@keyframes kitshop-zoom{from{opacity:0;transform:translateY(14px) scale(.97)}}
@keyframes kitshop-sheet{from{transform:translateY(40%);opacity:0}}
@keyframes kitshop-next{from{opacity:0;transform:translateX(24px)}}
@keyframes kitshop-prev{from{opacity:0;transform:translateX(-24px)}}
@keyframes kitshop-shake{20%{transform:translateX(-5px)}40%{transform:translateX(4px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}
@keyframes kitshop-draw{from{stroke-dashoffset:var(--kitshop-len,24)}}
@media (prefers-reduced-motion:reduce){[class*="kitshop-"]{animation:none!important}}`;

/** The keyframes of the shop motions. React hoists it once into the head. */
export function ShopMotion() {
  return (
    <style href="kitshop-motion" precedence="default">
      {SHOP_CSS}
    </style>
  );
}

/**
 * A number that glides from its last value to the new one, for totals and
 * subtotals. Starts at the value itself, so server and browser agree.
 */
export function useTween(value: number, ms = 650) {
  const [shown, setShown] = useState(value);
  const from = useRef(value);
  useEffect(() => {
    const start = from.current;
    if (start === value) return;
    if (prefersReducedMotion()) {
      from.current = value;
      setShown(value);
      return;
    }
    let raf = 0;
    const t0 = performance.now();
    const tick = (now: number) => {
      const t = Math.min(1, (now - t0) / ms);
      const v = t >= 1 ? value : start + (value - start) * (1 - Math.pow(1 - t, 3));
      from.current = v;
      setShown(v);
      if (t < 1) raf = requestAnimationFrame(tick);
    };
    raf = requestAnimationFrame(tick);
    return () => cancelAnimationFrame(raf);
  }, [value, ms]);
  return shown;
}

/** A price that counts to its new value when it changes (cart totals). Screen readers get the final value. */
export function TweenPrice({ value, currency = 'EUR', className }: { value: number; currency?: string; className?: string }) {
  const locale = useLocale();
  const shown = useTween(value);
  return (
    <span className={cn('tabular-nums', className)}>
      <span className="sr-only">{formatPrice(locale, value, currency)}</span>
      <span aria-hidden>{formatPrice(locale, shown, currency)}</span>
    </span>
  );
}

/** true once the value has changed after the first render */
function useChanged(value: unknown) {
  const first = useRef(value);
  const [changed, setChanged] = useState(false);
  useEffect(() => {
    if (value !== first.current) setChanged(true);
  }, [value]);
  return changed;
}

/**
 * Swaps its content with a short rise whenever `value` changes, for button
 * labels like "Add to cart" turning into "Added".
 */
export function Swap({ value, children, className }: { value: string | number | boolean; children: React.ReactNode; className?: string }) {
  const changed = useChanged(value);
  return (
    <>
      <ShopMotion />
      <span key={String(value)} className={cn('inline-flex items-center gap-[inherit]', changed && 'animate-[kitshop-swap_0.42s_var(--ease-kit)]', className)}>
        {children}
      </span>
    </>
  );
}

/**
 * "Added" feedback that resets itself. `count` rises with every add, pass it
 * to <FlyUp> so a small "+1" rises from the button each time.
 */
export function useAddFlash(ms = 1600) {
  const [state, setState] = useState<{ id: string | null; count: number }>({ id: null, count: 0 });
  const timer = useRef<ReturnType<typeof setTimeout>>(undefined);
  useEffect(() => () => clearTimeout(timer.current), []);
  const flash = (id: string) => {
    setState((s) => ({ id, count: s.count + 1 }));
    clearTimeout(timer.current);
    timer.current = setTimeout(() => setState((s) => ({ ...s, id: null })), ms);
  };
  return [state.id, flash, state.count] as const;
}

/** A "+1" that rises from its parent (which needs `relative`) and fades, once per `count`. */
export function FlyUp({ count, label = '+1', className }: { count: number; label?: string; className?: string }) {
  if (!count) return null;
  return (
    <>
      <ShopMotion />
      <span
        key={count}
        aria-hidden
        className={cn(
          'pointer-events-none absolute left-1/2 top-0 z-20 grid h-6 min-w-6 place-items-center rounded-full bg-primary px-1.5 text-[11px] font-semibold tabular-nums text-primary-foreground opacity-0 shadow-[var(--shadow-md)]',
          'animate-[kitshop-fly_0.9s_var(--ease-kit)_both] motion-reduce:hidden',
          className,
        )}
      >
        {label}
      </span>
    </>
  );
}

/* ------------------------------------------------------------------ */
/* Rating                                                              */
/* ------------------------------------------------------------------ */

const STAR = 'm12 2.8 2.76 5.6 6.18.9-4.47 4.36 1.05 6.15L12 16.9l-5.52 2.91 1.05-6.15L3.06 9.3l6.18-.9Z';

function StarRow({ size, className }: { size: number; className?: string }) {
  return (
    <span className={cn('flex gap-0.5', className)} aria-hidden>
      {[0, 1, 2, 3, 4].map((i) => (
        <svg key={i} viewBox="0 0 24 24" width={size} height={size} className="shrink-0" fill="currentColor">
          <path d={STAR} />
        </svg>
      ))}
    </span>
  );
}

/** Five stars with partial fill. With count it adds "(128)" or the full label. */
export function Rating({ value, count, size = 14, showValue, href, className }: { value: number; count?: number; size?: number; showValue?: boolean; href?: string; className?: string }) {
  const locale = useLocale();
  const t = useTexts(TEXTS);
  const pct = round(Math.max(0, Math.min(5, value)) * 20, 1);
  const label = `${formatNumber(locale, value, 1)} ${t.outOf}${count !== undefined ? `, ${formatNumber(locale, count)} ${t.reviews}` : ''}`;
  const Tag = href ? 'a' : 'span';
  return (
    <Tag {...(href ? { href } : {})} className={cn('inline-flex items-center gap-2 text-[13px] text-muted-foreground', href && 'hover:text-foreground', className)}>
      <span className="relative inline-flex" role="img" aria-label={label}>
        <StarRow size={size} className="text-[color-mix(in_oklch,var(--foreground)_14%,transparent)]" />
        <span data-clip-ok className="absolute inset-y-0 left-0 overflow-hidden" style={{ width: `${pct}%` }}>
          <StarRow size={size} className="text-foreground" />
        </span>
      </span>
      {showValue && <span className="font-medium tabular-nums text-foreground" aria-hidden>{formatNumber(locale, value, 1)}</span>}
      {count !== undefined && <span className="tabular-nums" aria-hidden>({formatNumber(locale, count)})</span>}
    </Tag>
  );
}

/* ------------------------------------------------------------------ */
/* Quantity                                                            */
/* ------------------------------------------------------------------ */

/** Minus, number, plus. The buttons keep a 44 px hit area even in the small size. */
export function Quantity({ value, onChange, min = 1, max = 99, size = 'md', label, className }: { value: number; onChange: (n: number) => void; min?: number; max?: number; size?: 'sm' | 'md'; label?: string; className?: string }) {
  const t = useTexts(TEXTS);
  // The direction of the last step, so the number rolls up or down
  const [dir, setDir] = useState<0 | 1 | -1>(0);
  const btn = cn(
    'relative grid place-items-center text-muted-foreground transition-colors hover:bg-accent hover:text-foreground disabled:pointer-events-none disabled:opacity-35',
    'after:absolute after:-inset-1 after:content-[""]',
    // The small stepper keeps 44 px buttons on touch phones, the group clips any outside hit area
    size === 'sm' ? 'size-8 max-sm:size-11' : 'size-11',
  );
  return (
    <div role="group" aria-label={label ?? t.quantity} className={cn('inline-flex shrink-0 items-center overflow-hidden rounded-lg border border-border-strong bg-background shadow-[var(--shadow-sm)]', className)}>
      <ShopMotion />
      <button type="button" className={cn(btn, 'active:[&>svg]:scale-75 [&>svg]:transition-transform')} onClick={() => { setDir(-1); onChange(Math.max(min, value - 1)); }} disabled={value <= min} aria-label={t.decrease}>
        <Icon name="minus" size={size === 'sm' ? 14 : 16} />
      </button>
      <output aria-live="polite" className={cn('min-w-7 overflow-hidden text-center font-medium tabular-nums text-foreground [clip-path:inset(0)]', size === 'sm' ? 'text-[13px]' : 'min-w-9 text-[15px]')}>
        <span key={value} className={cn('inline-block', dir === 1 && 'animate-[kitshop-up_0.32s_var(--ease-kit)]', dir === -1 && 'animate-[kitshop-down_0.32s_var(--ease-kit)]')}>
          {value}
        </span>
      </output>
      <button type="button" className={cn(btn, 'active:[&>svg]:scale-75 [&>svg]:transition-transform')} onClick={() => { setDir(1); onChange(Math.min(max, value + 1)); }} disabled={value >= max} aria-label={t.increase}>
        <Icon name="plus" size={size === 'sm' ? 14 : 16} />
      </button>
    </div>
  );
}

/* ------------------------------------------------------------------ */
/* Color swatches                                                      */
/* ------------------------------------------------------------------ */

/** A radio group of color dots. Hit area 44 px, the dot itself 28 or 22 px. */
export function SwatchGroup({ colors, value, onChange, name, size = 'md', label, className }: { colors: ShopColor[]; value: string; onChange?: (name: string) => void; name: string; size?: 'sm' | 'md'; label?: string; className?: string }) {
  const t = useTexts(TEXTS);
  const group = useRef<HTMLDivElement>(null);
  // One ring that glides to the picked color. Until it is measured (server,
  // no JavaScript) every swatch draws its own ring.
  const [ring, setRing] = useState<{ x: number; y: number; ready: boolean } | null>(null);
  const index = colors.findIndex((c) => c.name === value);
  useEffect(() => {
    const el = group.current;
    if (!el) return;
    const update = () => {
      const lab = el.children[index] as HTMLElement | undefined;
      if (!lab || lab.tagName !== 'LABEL') return setRing(null);
      setRing((r) => ({ x: lab.offsetLeft, y: lab.offsetTop, ready: !!r }));
    };
    update();
    const ro = new ResizeObserver(update);
    ro.observe(el);
    return () => ro.disconnect();
  }, [index]);
  return (
    <div ref={group} role="radiogroup" aria-label={label ?? t.color} className={cn('relative flex flex-wrap', size === 'sm' ? '-m-1.5' : '-m-2', className)}>
      {colors.map((c) => {
        const on = c.name === value;
        return (
          <label key={c.name} className={cn('group/sw relative grid cursor-pointer place-items-center rounded-full', size === 'sm' ? 'size-8' : 'size-11')} title={c.name}>
            <input type="radio" name={name} value={c.name} checked={on} onChange={() => onChange?.(c.name)} className="peer sr-only" />
            <span className="sr-only">{c.name}</span>
            <span
              aria-hidden
              className={cn(
                'block rounded-full shadow-[inset_0_0_0_1px_color-mix(in_oklch,var(--foreground)_14%,transparent),inset_0_6px_8px_-4px_rgb(255_255_255/0.35)] transition-[box-shadow,transform] duration-200 group-hover/sw:scale-105',
                size === 'sm' ? 'size-[18px]' : 'size-7',
                'peer-focus-visible:outline-2 peer-focus-visible:outline-offset-4 peer-focus-visible:outline-[var(--ring)]',
              )}
              style={{ background: c.color }}
            />
            <span aria-hidden className={cn('pointer-events-none absolute rounded-full border-[1.5px] transition-colors', size === 'sm' ? 'size-[26px]' : 'size-9', on && !ring ? 'border-foreground' : 'border-transparent')} />
          </label>
        );
      })}
      {ring && (
        <span
          aria-hidden
          className={cn('pointer-events-none absolute left-0 top-0 grid place-items-center', size === 'sm' ? 'size-8' : 'size-11', ring.ready && 'transition-transform duration-500 ease-[var(--ease-kit)] motion-reduce:transition-none')}
          style={{ transform: `translate3d(${ring.x}px, ${ring.y}px, 0)` }}
        >
          <span className={cn('rounded-full border-[1.5px] border-foreground', size === 'sm' ? 'size-[26px]' : 'size-9')} />
        </span>
      )}
    </div>
  );
}

/* ------------------------------------------------------------------ */
/* Sizes                                                               */
/* ------------------------------------------------------------------ */

/**
 * Size buttons as a radio group. Sold out sizes stay visible, struck
 * through and disabled, so nobody wonders whether the size exists.
 * Put it inside a <fieldset> with a <legend>.
 */
export function SizeGroup({ sizes, value, onChange, name, className }: { sizes: (string | ShopSize)[]; value: string; onChange: (label: string) => void; name: string; className?: string }) {
  const t = useTexts(TEXTS);
  return (
    <div className={cn('grid grid-cols-4 gap-2 sm:grid-cols-7', className)}>
      {sizesOf(sizes).map((s) => {
        const out = !!s.soldOut;
        const on = value === s.label && !out;
        return (
          <label
            key={s.label}
            title={out ? `${s.label}, ${t.soldOut}` : undefined}
            className={cn(
              'relative grid h-11 place-items-center overflow-hidden rounded-lg border text-[13px] font-medium tabular-nums transition-[border-color,background-color,color] has-[:focus-visible]:outline-2 has-[:focus-visible]:outline-offset-2 has-[:focus-visible]:outline-[var(--ring)]',
              out && 'cursor-not-allowed border-border bg-surface text-subtle-foreground',
              !out && (on ? 'cursor-pointer border-foreground bg-foreground text-background' : 'cursor-pointer border-border-strong bg-background text-foreground hover:border-[color-mix(in_oklab,var(--foreground)_45%,var(--border-strong))]'),
            )}
          >
            <input type="radio" name={name} value={s.label} checked={on} disabled={out} onChange={() => onChange(s.label)} className="sr-only" />
            {s.label}
            {out && (
              <>
                <span className="sr-only">, {t.soldOut}</span>
                <svg aria-hidden className="absolute inset-0 size-full text-border-strong" preserveAspectRatio="none" viewBox="0 0 100 100">
                  <path d="M0 100 100 0" stroke="currentColor" strokeWidth="1" vectorEffect="non-scaling-stroke" />
                </svg>
              </>
            )}
          </label>
        );
      })}
    </div>
  );
}

/* ------------------------------------------------------------------ */
/* Product images                                                      */
/* ------------------------------------------------------------------ */

/**
 * Product colors for the drawn motifs and for swatches. These are product
 * colors, like the pixels of a photo, so they stay the same in both modes.
 * `accent` follows the project's accent, `ink` and `paper` follow the theme.
 */
export const PRODUCT_TONES = {
  clay: 'oklch(0.66 0.1 42)',
  sand: 'oklch(0.84 0.045 78)',
  kraft: 'oklch(0.72 0.07 68)',
  cream: 'oklch(0.94 0.022 85)',
  sage: 'oklch(0.72 0.05 152)',
  forest: 'oklch(0.46 0.06 162)',
  ocean: 'oklch(0.56 0.085 236)',
  mist: 'oklch(0.82 0.03 230)',
  stone: 'oklch(0.76 0.008 260)',
  graphite: 'oklch(0.36 0.012 260)',
  ochre: 'oklch(0.76 0.12 78)',
  berry: 'oklch(0.52 0.12 12)',
  blush: 'oklch(0.85 0.05 30)',
  accent: 'var(--primary)',
  ink: 'color-mix(in oklch, var(--foreground) 88%, var(--background))',
  paper: 'color-mix(in oklch, var(--background) 92%, var(--foreground))',
} as const;

export type ProductTone = keyof typeof PRODUCT_TONES;
export type ProductMotif = 'mug' | 'bowl' | 'vase' | 'candle' | 'lamp' | 'pouch' | 'bottle' | 'backpack' | 'sneaker' | 'headphones' | 'watch' | 'tote';
export const PRODUCT_MOTIFS: ProductMotif[] = ['mug', 'bowl', 'vase', 'candle', 'lamp', 'pouch', 'bottle', 'backpack', 'sneaker', 'headphones', 'watch', 'tote'];

/** Second color per motif: raw clay under the glaze, the cap of a bottle, the case of a watch */
const DETAIL: Record<ProductMotif, ProductTone> = {
  mug: 'sand',
  bowl: 'sand',
  vase: 'kraft',
  candle: 'cream',
  lamp: 'stone',
  pouch: 'cream',
  bottle: 'graphite',
  backpack: 'kraft',
  sneaker: 'cream',
  headphones: 'stone',
  watch: 'stone',
  tote: 'graphite',
};

const toneValue = (tone: ProductTone | string) => (tone in PRODUCT_TONES ? PRODUCT_TONES[tone as ProductTone] : tone);

const shade = (c: string, pct: number) => `color-mix(in oklch, ${c} ${pct}%, black)`;
const light = (c: string, pct: number) => `color-mix(in oklch, ${c} ${pct}%, white)`;

const A = 'var(--pi)';
const B = 'var(--pi2)';

/** Gradients shared by all motifs, one set per image so ids never collide */
function Defs({ p }: { p: string }) {
  const cyl = (id: string, c: string) => (
    <linearGradient id={p + id} x1="0" x2="1" y1="0" y2="0">
      <stop offset="0" style={{ stopColor: shade(c, 58) }} />
      <stop offset="0.14" style={{ stopColor: shade(c, 84) }} />
      <stop offset="0.33" style={{ stopColor: c }} />
      <stop offset="0.43" style={{ stopColor: light(c, 74) }} />
      <stop offset="0.56" style={{ stopColor: c }} />
      <stop offset="0.86" style={{ stopColor: shade(c, 80) }} />
      <stop offset="1" style={{ stopColor: shade(c, 64) }} />
    </linearGradient>
  );
  const vert = (id: string, c: string) => (
    <linearGradient id={p + id} x1="0" x2="0" y1="0" y2="1">
      <stop offset="0" style={{ stopColor: light(c, 84) }} />
      <stop offset="0.5" style={{ stopColor: c }} />
      <stop offset="1" style={{ stopColor: shade(c, 80) }} />
    </linearGradient>
  );
  return (
    <defs>
      {cyl('c', A)}
      {cyl('d', B)}
      {vert('v', A)}
      {vert('w', B)}
      <linearGradient id={p + 'in'} x1="0" x2="0" y1="0" y2="1">
        <stop offset="0" style={{ stopColor: shade(A, 55) }} />
        <stop offset="1" style={{ stopColor: shade(A, 85) }} />
      </linearGradient>
      <linearGradient id={p + 'g'} x1="0" x2="0" y1="0" y2="1">
        <stop offset="0" stopColor="#fff" stopOpacity="0.55" />
        <stop offset="1" stopColor="#fff" stopOpacity="0" />
      </linearGradient>
      <radialGradient id={p + 'f'}>
        <stop offset="0" stopColor="#000" style={{ stopOpacity: 'var(--pi-floor)' }} />
        <stop offset="1" stopColor="#000" stopOpacity="0" />
      </radialGradient>
      <radialGradient id={p + 'flame'} cx="0.5" cy="0.7" r="0.6">
        <stop offset="0" stopColor="oklch(0.98 0.06 95)" />
        <stop offset="0.55" stopColor="oklch(0.86 0.15 80)" />
        <stop offset="1" stopColor="oklch(0.7 0.18 50)" />
      </radialGradient>
      <radialGradient id={p + 'warm'}>
        <stop offset="0" stopColor="oklch(0.9 0.13 85)" stopOpacity="0.55" />
        <stop offset="1" stopColor="oklch(0.9 0.13 85)" stopOpacity="0" />
      </radialGradient>
      <linearGradient id={p + 'cone'} x1="0" x2="0" y1="0" y2="1">
        <stop offset="0" stopColor="oklch(0.95 0.09 88)" stopOpacity="0.5" />
        <stop offset="1" stopColor="oklch(0.95 0.09 88)" stopOpacity="0" />
      </linearGradient>
      <filter id={p + 'b'} x="-30%" y="-30%" width="160%" height="160%">
        <feGaussianBlur stdDeviation="9" />
      </filter>
    </defs>
  );
}

/** A soft shadow on the floor, wide and faint, with a tighter contact shadow */
function Floor({ p, cx = 200, rx }: { p: string; cx?: number; rx: number }) {
  return (
    <g aria-hidden>
      <ellipse cx={cx} cy={318} rx={rx * 1.5} ry={15} fill={`url(#${p}f)`} />
      <ellipse cx={cx} cy={317} rx={rx * 0.95} ry={5} fill={`url(#${p}f)`} />
    </g>
  );
}

type Draw = (p: string, text?: string) => React.ReactNode;
const u = (p: string, id: string) => `url(#${p}${id})`;

const SPECKS = [
  [152, 236], [171, 252], [196, 241], [224, 258], [247, 236], [181, 274], [214, 280], [139, 222], [262, 226], [204, 226], [233, 271], [161, 262],
];

const MOTIFS: Record<ProductMotif, { floor?: { cx?: number; rx: number }; draw: Draw }> = {
  mug: {
    floor: { cx: 196, rx: 64 },
    draw: (p) => (
      <>
        <path d="M246 182c46-4 50 78 2 80" fill="none" stroke={shade(A, 78)} strokeWidth="17" strokeLinecap="round" />
        <path d="M246 182c46-4 50 78 2 80" fill="none" stroke={A} strokeWidth="11" strokeLinecap="round" />
        <path d="M138 150h110v146a20 20 0 0 1-20 20h-70a20 20 0 0 1-20-20Z" fill={u(p, 'd')} />
        <path d="M138 150h110v132c-6 4-12 6-18 2s-12-4-18 2-14 4-20 0-12-5-18 1-12 3-18-1-12-2-18 0Z" fill={u(p, 'c')} />
        <rect x="156" y="164" width="9" height="104" rx="4.5" fill={u(p, 'g')} opacity="0.7" />
        <ellipse cx="193" cy="150" rx="55" ry="12" style={{ fill: light(A, 70) }} />
        <ellipse cx="193" cy="151.5" rx="48.5" ry="8.5" fill={u(p, 'in')} />
      </>
    ),
  },
  bowl: {
    floor: { rx: 70 },
    draw: (p) => (
      <>
        <path d="M172 296h56v14a6 6 0 0 1-6 6h-44a6 6 0 0 1-6-6Z" fill={u(p, 'd')} />
        <path d="M106 222h188c0 46-36 80-94 80s-94-34-94-80Z" fill={u(p, 'c')} />
        {SPECKS.map(([x, y], i) => (
          <circle key={i} cx={x} cy={y} r={i % 3 ? 1.2 : 1.7} style={{ fill: shade(A, 55) }} opacity="0.45" />
        ))}
        <path d="M130 236c10 26 30 44 52 50" fill="none" stroke="#fff" strokeOpacity="0.28" strokeWidth="5" strokeLinecap="round" />
        <ellipse cx="200" cy="222" rx="94" ry="21" style={{ fill: light(A, 72) }} />
        <ellipse cx="200" cy="223.5" rx="86" ry="16.5" fill={u(p, 'in')} />
        <ellipse cx="200" cy="228" rx="58" ry="8" style={{ fill: shade(A, 72) }} opacity="0.6" />
      </>
    ),
  },
  vase: {
    floor: { rx: 46 },
    draw: (p) => (
      <>
        <g fill="none" strokeLinecap="round" style={{ stroke: shade(B, 70) }} strokeWidth="2">
          <path d="M199 122c-4-34-14-56-32-78" />
          <path d="M202 122c6-30 18-50 36-64" />
          <path d="M200 122c0-24 2-44 6-60" />
        </g>
        <g style={{ fill: B }}>
          {[
            [176, 54, -40], [168, 66, -60], [181, 72, -35], [173, 84, -55], [186, 90, -30],
            [230, 62, 40], [224, 74, 55], [216, 82, 35], [212, 94, 60],
            [205, 66, 10], [204, 80, -12], [203, 94, 14],
          ].map(([x, y, r], i) => (
            <ellipse key={i} cx={x} cy={y} rx="3.4" ry="7.5" transform={`rotate(${r} ${x} ${y})`} />
          ))}
        </g>
        <path d="M182 118h36c-1 6-3 9-4 12 0 30 56 60 56 118 0 40-22 60-34 68h-72c-12-8-34-28-34-68 0-58 56-88 56-118-1-3-3-6-4-12Z" fill={u(p, 'c')} />
        <g fill="none" stroke="#000" strokeOpacity="0.07">
          <path d="M140 220c36 8 84 8 120 0" />
          <path d="M132 252c42 8 94 8 136 0" />
          <path d="M136 284c40 8 88 8 128 0" />
        </g>
        <path d="M156 200c-14 22-16 52-6 78" fill="none" stroke="#fff" strokeOpacity="0.3" strokeWidth="6" strokeLinecap="round" />
        <ellipse cx="200" cy="118" rx="18" ry="4" style={{ fill: shade(A, 50) }} />
      </>
    ),
  },
  candle: {
    floor: { rx: 64 },
    draw: (p, text) => (
      <>
        <circle cx="200" cy="168" r="44" fill={u(p, 'warm')} />
        <path d="M142 196h116v104a16 16 0 0 1-16 16h-84a16 16 0 0 1-16-16Z" fill={u(p, 'c')} />
        <rect x="158" y="208" width="8" height="96" rx="4" fill={u(p, 'g')} opacity="0.55" />
        <ellipse cx="200" cy="196" rx="58" ry="11" style={{ fill: light(A, 70) }} />
        <ellipse cx="200" cy="198.5" rx="52" ry="8" fill={u(p, 'w')} />
        <path d="M200 199v-12" style={{ stroke: shade(B, 30) }} strokeWidth="2.5" strokeLinecap="round" />
        <path d="M200 146c11 15 13 28 0 40-13-12-11-25 0-40Z" fill={u(p, 'flame')} />
        <rect x="166" y="232" width="68" height="50" rx="3" style={{ fill: B }} opacity="0.94" />
        {text ? (
          <text x="200" y="262" textAnchor="middle" fontSize="13" fontWeight="600" letterSpacing="1.5" style={{ fill: shade(B, 30) }}>
            {text}
          </text>
        ) : (
          <>
            <rect x="182" y="250" width="36" height="4" rx="2" style={{ fill: shade(B, 40) }} />
            <rect x="188" y="260" width="24" height="3" rx="1.5" style={{ fill: shade(B, 62) }} />
          </>
        )}
      </>
    ),
  },
  lamp: {
    floor: { rx: 54 },
    draw: (p) => (
      <>
        <path d="M130 196h140l52 120H78Z" fill={u(p, 'cone')} />
        <path d="M150 304a10 10 0 0 1 10-8h80a10 10 0 0 1 10 8v4a8 8 0 0 1-8 8h-84a8 8 0 0 1-8-8Z" fill={u(p, 'd')} />
        <rect x="196.5" y="190" width="7" height="108" rx="3.5" fill={u(p, 'd')} />
        <path d="M162 110h76l34 86H128Z" fill={u(p, 'c')} />
        <ellipse cx="200" cy="196" rx="72" ry="10" style={{ fill: 'oklch(0.96 0.07 90)' }} />
        <ellipse cx="200" cy="110" rx="38" ry="5.5" style={{ fill: shade(A, 62) }} />
        <path d="M166 122c-8 22-16 44-22 64" fill="none" stroke="#fff" strokeOpacity="0.3" strokeWidth="5" strokeLinecap="round" />
      </>
    ),
  },
  pouch: {
    floor: { rx: 66 },
    draw: (p, text) => (
      <>
        <path d="M144 118h112l8 182a16 16 0 0 1-16 16H152a16 16 0 0 1-16-16Z" fill={u(p, 'c')} />
        <path d="M144 98h112v22H144Z" style={{ fill: shade(A, 88) }} />
        <g style={{ stroke: shade(A, 60) }} strokeOpacity="0.5" strokeWidth="1.2">
          {Array.from({ length: 27 }, (_, i) => (
            <path key={i} d={`M${148 + i * 4} 101v16`} />
          ))}
        </g>
        <path d="M144 120h112" style={{ stroke: shade(A, 60) }} strokeOpacity="0.5" />
        <circle cx="200" cy="146" r="7" style={{ fill: shade(A, 70) }} />
        <circle cx="200" cy="146" r="3" style={{ fill: shade(A, 45) }} />
        <rect x="158" y="176" width="84" height="104" rx="5" style={{ fill: B }} />
        <rect x="158" y="176" width="84" height="104" rx="5" fill="none" style={{ stroke: shade(B, 80) }} strokeOpacity="0.5" />
        <text x="200" y="214" textAnchor="middle" fontSize="17" fontWeight="650" letterSpacing="-0.3" style={{ fill: shade(B, 22) }}>
          {text ?? 'Nº 7'}
        </text>
        <rect x="178" y="226" width="44" height="3" rx="1.5" style={{ fill: shade(B, 45) }} />
        <rect x="184" y="236" width="32" height="3" rx="1.5" style={{ fill: shade(B, 60) }} />
        <ellipse cx="200" cy="258" rx="7" ry="10" transform="rotate(-24 200 258)" style={{ fill: shade(B, 45) }} />
        <path d="M197 249c5 5-2 12 3 18" fill="none" style={{ stroke: light(B, 60) }} strokeWidth="1.6" strokeLinecap="round" />
      </>
    ),
  },
  bottle: {
    floor: { rx: 40 },
    draw: (p, text) => (
      <>
        <path d="M192 66c0-22 16-22 16 0" fill="none" style={{ stroke: shade(B, 70) }} strokeWidth="6" strokeLinecap="round" />
        <path d="M180 72a10 10 0 0 1 10-10h20a10 10 0 0 1 10 10v40h-40Z" fill={u(p, 'd')} />
        <rect x="177" y="104" width="46" height="10" rx="3" style={{ fill: shade(B, 70) }} />
        <path d="M168 136c0-14 8-20 16-22h32c8 2 16 8 16 22v164a16 16 0 0 1-16 16h-32a16 16 0 0 1-16-16Z" fill={u(p, 'c')} />
        <rect x="181" y="134" width="7" height="166" rx="3.5" fill={u(p, 'g')} opacity="0.65" />
        <path d="M168 288h64" style={{ stroke: shade(A, 70) }} strokeOpacity="0.5" />
        {text && (
          <text x="0" y="0" transform="translate(206 226) rotate(-90)" textAnchor="middle" fontSize="12" fontWeight="600" letterSpacing="2.5" style={{ fill: light(A, 30) }} opacity="0.85">
            {text}
          </text>
        )}
      </>
    ),
  },
  backpack: {
    floor: { rx: 72 },
    draw: (p) => (
      <>
        <rect x="124" y="120" width="16" height="170" rx="7" style={{ fill: shade(A, 72) }} />
        <rect x="260" y="120" width="16" height="170" rx="7" style={{ fill: shade(A, 62) }} />
        <path d="M186 88c0-24 28-24 28 0" fill="none" style={{ stroke: shade(A, 70) }} strokeWidth="7" strokeLinecap="round" />
        <path d="M134 120c0-22 18-34 38-34h56c20 0 38 12 38 34v180a16 16 0 0 1-16 16H150a16 16 0 0 1-16-16Z" fill={u(p, 'c')} />
        <path d="M134 142c26 14 106 14 132 0" fill="none" style={{ stroke: shade(A, 68) }} strokeWidth="1.6" strokeDasharray="4 4" />
        <rect x="185" y="166" width="30" height="22" rx="4" style={{ fill: B }} />
        <path d="M150 220a8 8 0 0 1 8-8h84a8 8 0 0 1 8 8v70a12 12 0 0 1-12 12h-76a12 12 0 0 1-12-12Z" style={{ fill: shade(A, 90) }} />
        <path d="M150 222c30-6 70-6 100 0" fill="none" style={{ stroke: shade(A, 55) }} strokeWidth="2" />
        <rect x="226" y="219" width="7" height="16" rx="2" style={{ fill: B }} />
        <rect x="150" y="128" width="9" height="150" rx="4.5" fill={u(p, 'g')} opacity="0.45" />
      </>
    ),
  },
  sneaker: {
    floor: { cx: 214, rx: 126 },
    draw: (p) => (
      <>
        {/* Outsole and a slim midsole with a rocker at the toe */}
        <path d="M94 302h234c9 0 14 5 10 10-3 4-8 6-16 6H106c-8 0-12-5-12-11Z" style={{ fill: shade(B, 50) }} />
        <path d="M90 291c0-8 6-14 15-14h200c22 0 38 7 42 17 2 7-4 11-14 11H104c-8 0-14-6-14-14Z" fill={u(p, 'w')} />
        <path d="M98 284c56-3 150-3 238 2" fill="none" style={{ stroke: shade(B, 72) }} strokeOpacity="0.55" strokeWidth="1.2" strokeDasharray="3 4" />
        {/* Upper */}
        <path d="M100 279c-8-24-10-48-2-66 5-11 15-17 27-12 14 7 30 9 44 2l14-30c4-8 14-9 20-3l12 14c24 26 58 46 94 58 20 7 30 18 30 37Z" fill={u(p, 'v')} />
        {/* Heel counter, toe cap and a side panel in deeper and lighter shades */}
        <path d="M100 279c-8-24-9-46-1-63 15 14 27 38 30 63Z" style={{ fill: shade(A, 82) }} />
        <path d="M270 237c26 8 52 18 62 28 6 6 6 14 6 14h-72c-4-16-2-30 4-42Z" style={{ fill: shade(A, 86) }} />
        <path d="M150 279c10-28 32-50 60-64l30 22c-22 10-40 26-50 42Z" style={{ fill: light(A, 78) }} opacity="0.5" />
        {/* Collar lining and pull tab */}
        <path d="M101 205c9-9 20-10 33-3 14 7 28 8 38 1" fill="none" style={{ stroke: shade(A, 45) }} strokeWidth="5" strokeLinecap="round" />
        <path d="M96 215c-4-12-1-22 6-24l5 2 1 20Z" style={{ fill: B }} />
        {/* Eyelet stay and laces */}
        <path d="M193 176c18 22 42 40 70 52" fill="none" style={{ stroke: shade(A, 74) }} strokeWidth="12" strokeLinecap="round" />
        <g style={{ stroke: light(B, 40) }} strokeWidth="3" strokeLinecap="round">
          <path d="M191 188l12-15" />
          <path d="M205 200l12-14" />
          <path d="M220 211l11-14" />
          <path d="M235 220l11-13" />
          <path d="M250 228l10-13" />
        </g>
        <path d="M186 166c-2-12 6-19 15-16l10 10-8 10Z" style={{ fill: light(A, 62) }} />
        {/* Light along the top line and the sole */}
        <path d="M218 182c26 24 60 42 96 52" fill="none" stroke="#fff" strokeOpacity="0.32" strokeWidth="3" strokeLinecap="round" />
        <path d="M112 297h56" stroke="#fff" strokeOpacity="0.55" strokeWidth="2.5" strokeLinecap="round" />
      </>
    ),
  },
  headphones: {
    floor: { rx: 100 },
    draw: (p) => (
      <>
        <path d="M120 232c0-120 160-120 160 0" fill="none" style={{ stroke: shade(B, 70) }} strokeWidth="14" strokeLinecap="round" />
        <path d="M120 232c0-120 160-120 160 0" fill="none" style={{ stroke: B }} strokeWidth="9" strokeLinecap="round" />
        <path d="M152 146c24-22 72-22 96 0" fill="none" style={{ stroke: shade(A, 85) }} strokeWidth="20" strokeLinecap="round" />
        <path d="M156 140c22-16 66-16 88 0" fill="none" style={{ stroke: light(A, 72) }} strokeOpacity="0.5" strokeWidth="3" strokeLinecap="round" />
        <rect x="113" y="204" width="14" height="40" rx="5" fill={u(p, 'd')} />
        <rect x="273" y="204" width="14" height="40" rx="5" fill={u(p, 'd')} />
        <rect x="92" y="226" width="56" height="90" rx="26" fill={u(p, 'c')} />
        <rect x="252" y="226" width="56" height="90" rx="26" fill={u(p, 'c')} />
        <rect x="140" y="234" width="16" height="74" rx="8" style={{ fill: shade(A, 60) }} />
        <rect x="244" y="234" width="16" height="74" rx="8" style={{ fill: shade(A, 60) }} />
        <rect x="104" y="240" width="7" height="60" rx="3.5" fill={u(p, 'g')} opacity="0.6" />
        <rect x="264" y="240" width="7" height="60" rx="3.5" fill={u(p, 'g')} opacity="0.6" />
      </>
    ),
  },
  watch: {
    draw: (p, text) => {
      const ticks = Array.from({ length: 12 }, (_, i) => {
        const a = (i / 12) * Math.PI * 2;
        const r1 = i % 3 === 0 ? 38 : 42;
        return [round(200 + Math.sin(a) * r1), round(200 - Math.cos(a) * r1), round(200 + Math.sin(a) * 47), round(200 - Math.cos(a) * 47), i % 3 === 0] as const;
      });
      return (
        <>
          <g filter={u(p, 'b')} opacity="0.5">
            <rect x="178" y="80" width="56" height="260" rx="10" fill="#000" style={{ opacity: 'var(--pi-floor)' }} />
            <circle cx="208" cy="214" r="66" fill="#000" style={{ opacity: 'var(--pi-floor)' }} />
          </g>
          <path d="M174 60h52l-5 92h-42Z" style={{ fill: shade(A, 72) }} />
          <path d="M179 248h42l5 92h-52Z" style={{ fill: shade(A, 72) }} />
          <g style={{ fill: shade(A, 45) }}>
            <circle cx="200" cy="290" r="2.5" />
            <circle cx="200" cy="306" r="2.5" />
            <circle cx="200" cy="322" r="2.5" />
          </g>
          <rect x="260" y="191" width="12" height="18" rx="3" fill={u(p, 'd')} />
          <circle cx="200" cy="200" r="64" fill={u(p, 'd')} />
          <circle cx="200" cy="200" r="57" style={{ fill: shade(B, 60) }} />
          <circle cx="200" cy="200" r="53" style={{ fill: A }} />
          {ticks.map(([x1, y1, x2, y2, major], i) => (
            <path key={i} d={`M${x1} ${y1}L${x2} ${y2}`} style={{ stroke: light(A, 20) }} strokeWidth={major ? 3 : 1.5} strokeLinecap="round" />
          ))}
          {text && (
            <text x="200" y="232" textAnchor="middle" fontSize="8" fontWeight="600" letterSpacing="1.5" style={{ fill: light(A, 30) }} opacity="0.8">
              {text}
            </text>
          )}
          <path d="M200 200 186 177" style={{ stroke: light(A, 15) }} strokeWidth="4" strokeLinecap="round" />
          <path d="M200 200 233 186" style={{ stroke: light(A, 15) }} strokeWidth="3" strokeLinecap="round" />
          <path d="M200 200 196 236" stroke="oklch(0.68 0.17 40)" strokeWidth="1.5" strokeLinecap="round" />
          <circle cx="200" cy="200" r="4" style={{ fill: light(A, 15) }} />
          <path d="M156 170a52 52 0 0 1 50-24" fill="none" stroke="#fff" strokeOpacity="0.28" strokeWidth="6" strokeLinecap="round" />
        </>
      );
    },
  },
  tote: {
    floor: { rx: 92 },
    draw: (p) => (
      <>
        <path d="M170 172c0-80 60-80 60 0" fill="none" style={{ stroke: shade(A, 62) }} strokeWidth="10" strokeLinecap="round" />
        <path d="M128 168h144l10 140a10 10 0 0 1-10 10H128a10 10 0 0 1-10-10Z" fill={u(p, 'c')} />
        <path d="M128 168h144l1 12H127Z" style={{ fill: shade(A, 82) }} />
        <path d="M200 182v130" style={{ stroke: shade(A, 80) }} strokeOpacity="0.25" strokeWidth="2" />
        <path d="M156 186c0-90 88-90 88 0" fill="none" style={{ stroke: shade(A, 85) }} strokeWidth="11" strokeLinecap="round" />
        <path d="M156 186c0-90 88-90 88 0" fill="none" style={{ stroke: light(A, 60) }} strokeOpacity="0.45" strokeWidth="2" strokeDasharray="3 4" />
        <rect x="150" y="176" width="13" height="18" rx="2" style={{ fill: shade(A, 78) }} />
        <rect x="237" y="176" width="13" height="18" rx="2" style={{ fill: shade(A, 78) }} />
        <rect x="186" y="262" width="28" height="18" rx="2" style={{ fill: B }} />
        <rect x="140" y="184" width="10" height="120" rx="5" fill={u(p, 'g')} opacity="0.4" />
      </>
    ),
  },
};

export type ProductView = 'front' | 'side' | 'close' | 'scene';
export type ProductBackdrop = 'soft' | 'tinted' | 'plain';

export interface ProductImageProps {
  motif: ProductMotif;
  /** Main color: a key of PRODUCT_TONES or any CSS color */
  tone?: ProductTone | (string & {});
  /** Second color: clay foot, bottle cap, watch case, sneaker sole */
  detail?: ProductTone | (string & {});
  /** front, side (mirrored, light from the right), close (detail crop), scene (on a plinth) */
  view?: ProductView;
  /** soft: neutral surface. tinted: a pale wash of the product color. plain: no background. */
  backdrop?: ProductBackdrop;
  /** Scale the product inside its frame, 0.8 leaves more room around it */
  zoom?: number;
  /** Move the product down (positive) or up, in percent of the frame height */
  shiftY?: number;
  /** Move the product right (positive) or left, in percent of the frame width */
  shiftX?: number;
  /** Short text on the label, engraving or dial */
  text?: string;
  /** Alt text. Without it the image is decorative. */
  label?: string;
  className?: string;
}

const VIEWBOX: Record<ProductView, string> = {
  front: '36 36 328 328',
  side: '36 36 328 328',
  close: '80 70 240 240',
  scene: '0 20 400 400',
};

/**
 * A drawn product on soft studio light. Fills its parent when the parent
 * has a size (as in ProductMedia), otherwise it is square.
 */
export function ProductImage({ motif, tone = 'clay', detail, view = 'front', backdrop = 'soft', zoom = 1, shiftY = 0, shiftX = 0, text, label, className }: ProductImageProps) {
  const [vx, vy, vw, vh] = VIEWBOX[view].split(' ').map(Number);
  const w = vw / zoom;
  const h = vh / zoom;
  const viewBox = [vx - (w - vw) / 2 - (shiftX / 100) * w, vy - (h - vh) / 2 - (shiftY / 100) * h, w, h].map((n) => round(n)).join(' ');
  const p = 'pi' + useId().replace(/[^a-zA-Z0-9]/g, '');
  const m = MOTIFS[motif];
  const main = toneValue(tone);
  const second = toneValue(detail ?? DETAIL[motif]);
  const mirrored = view === 'side';
  const object = (
    <>
      {m.floor && <Floor p={p} cx={m.floor.cx} rx={m.floor.rx} />}
      {m.draw(p, mirrored ? undefined : text)}
    </>
  );
  return (
    <div
      data-clip-ok
      role={label ? 'img' : undefined}
      aria-label={label}
      aria-hidden={label ? undefined : true}
      className={cn(
        'relative isolate aspect-square w-full overflow-hidden [--pi-floor:0.2] dark:[--pi-floor:0.55]',
        '[--pi-plinth-a:color-mix(in_oklab,var(--foreground)_3%,var(--surface))] [--pi-plinth-b:var(--background)] [--pi-plinth-c:color-mix(in_oklab,var(--foreground)_9%,var(--surface-2))] [--pi-plinth-top:var(--background)] [--pi-plinth-edge:rgb(255_255_255/0.9)]',
        'dark:[--pi-plinth-a:color-mix(in_oklab,var(--foreground)_10%,var(--surface-2))] dark:[--pi-plinth-b:color-mix(in_oklab,var(--foreground)_16%,var(--surface-2))] dark:[--pi-plinth-c:color-mix(in_oklab,var(--foreground)_5%,var(--surface-2))] dark:[--pi-plinth-top:color-mix(in_oklab,var(--foreground)_22%,var(--surface-2))] dark:[--pi-plinth-edge:rgb(255_255_255/0.14)]',
        backdrop === 'soft' && 'bg-surface-2',
        className,
      )}
      style={{ '--pi': main, '--pi2': second, ...(backdrop === 'tinted' ? { background: `color-mix(in oklab, ${main} 16%, var(--surface-2))` } : {}) } as React.CSSProperties}
    >
      {backdrop !== 'plain' && (
        <>
          <div
            aria-hidden
            className={cn(
              'absolute inset-0 -z-10',
              mirrored
                ? 'bg-[radial-gradient(80%_70%_at_72%_16%,rgb(255_255_255/0.8),transparent_70%)] dark:bg-[radial-gradient(80%_70%_at_72%_16%,rgb(255_255_255/0.11),transparent_70%)]'
                : 'bg-[radial-gradient(80%_70%_at_28%_16%,rgb(255_255_255/0.8),transparent_70%)] dark:bg-[radial-gradient(80%_70%_at_28%_16%,rgb(255_255_255/0.11),transparent_70%)]',
            )}
          />
          <div aria-hidden className="absolute inset-x-0 bottom-0 -z-10 h-2/5 bg-[linear-gradient(to_top,color-mix(in_oklch,var(--foreground)_5%,transparent),transparent)]" />
        </>
      )}
      <svg viewBox={viewBox} preserveAspectRatio="xMidYMid meet" className="absolute inset-0 size-full" aria-hidden>
        <Defs p={p} />
        {view === 'scene' && (
          <g aria-hidden>
            {/* A round plinth, lit from the upper left like the product */}
            <linearGradient id={p + 'pl'} x1="0" x2="1" y1="0" y2="0">
              <stop offset="0" style={{ stopColor: 'var(--pi-plinth-a)' }} />
              <stop offset="0.38" style={{ stopColor: 'var(--pi-plinth-b)' }} />
              <stop offset="1" style={{ stopColor: 'var(--pi-plinth-c)' }} />
            </linearGradient>
            <radialGradient id={p + 'ball'} cx="0.36" cy="0.32" r="0.75">
              <stop offset="0" style={{ stopColor: light(second, 55) }} />
              <stop offset="0.55" style={{ stopColor: second }} />
              <stop offset="1" style={{ stopColor: shade(second, 62) }} />
            </radialGradient>
            <path d="M80 312v120h240V312Z" fill={u(p, 'pl')} />
            <ellipse cx="200" cy="312" rx="120" ry="16" style={{ fill: 'var(--pi-plinth-top)' }} />
            <path d="M80 312a120 16 0 0 0 240 0" fill="none" style={{ stroke: 'var(--pi-plinth-edge)' }} strokeWidth="1.5" />
            <ellipse cx="292" cy="316" rx="20" ry="4" fill={u(p, 'f')} />
            <circle cx="292" cy="298" r="16" fill={u(p, 'ball')} />
          </g>
        )}
        {mirrored ? <g transform="translate(400 0) scale(-1 1)">{object}</g> : view === 'scene' ? <g transform="translate(-14 0)">{object}</g> : object}
      </svg>
    </div>
  );
}

/**
 * The frame for every product image in the shop blocks: radius, crop and a
 * calm surface while an image loads. Children fill it, <img> covers.
 */
export function ProductMedia({ children, className, style }: { children: React.ReactNode; className?: string; style?: React.CSSProperties }) {
  return (
    <div className={cn('relative overflow-hidden rounded-xl bg-surface-2 *:size-full *:object-cover', className)} style={style}>
      {children}
    </div>
  );
}